EP0396295A2 - Pince ou tenailles avec axes de pivotement composés - Google Patents

Pince ou tenailles avec axes de pivotement composés Download PDF

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Publication number
EP0396295A2
EP0396295A2 EP90304334A EP90304334A EP0396295A2 EP 0396295 A2 EP0396295 A2 EP 0396295A2 EP 90304334 A EP90304334 A EP 90304334A EP 90304334 A EP90304334 A EP 90304334A EP 0396295 A2 EP0396295 A2 EP 0396295A2
Authority
EP
European Patent Office
Prior art keywords
nippers
pliers
jaw members
members
jaw
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP90304334A
Other languages
German (de)
English (en)
Other versions
EP0396295A3 (fr
Inventor
Eric Rommerdale
Roger Huschelrath
Tilo Huschelrath
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
WE Bassett Co
Original Assignee
WE Bassett Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by WE Bassett Co filed Critical WE Bassett Co
Publication of EP0396295A2 publication Critical patent/EP0396295A2/fr
Publication of EP0396295A3 publication Critical patent/EP0396295A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING, OR HOLDING
    • B25B7/00—Pliers; Other hand-held gripping tools with jaws on pivoted limbs; Details applicable generally to pivoted-limb hand tools
    • A—HUMAN NECESSITIES
    • A45—HAND OR TRAVELLING ARTICLES
    • A45D—HAIRDRESSING OR SHAVING EQUIPMENT; EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
    • A45D29/00—Manicuring or pedicuring implements
    • A45D29/02—Nail clippers or cutters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING, OR HOLDING
    • B25B7/00—Pliers; Other hand-held gripping tools with jaws on pivoted limbs; Details applicable generally to pivoted-limb hand tools
    • B25B7/06—Joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING, OR HOLDING
    • B25B7/00—Pliers; Other hand-held gripping tools with jaws on pivoted limbs; Details applicable generally to pivoted-limb hand tools
    • B25B7/12—Pliers; Other hand-held gripping tools with jaws on pivoted limbs; Details applicable generally to pivoted-limb hand tools involving special transmission means between the handles and the jaws, e.g. toggle levers, gears
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B17/00—Hand cutting tools, i.e. with the cutting action actuated by muscle power with two jaws which come into abutting contact
    • B26B17/02—Hand cutting tools, i.e. with the cutting action actuated by muscle power with two jaws which come into abutting contact with jaws operated indirectly by the handles, e.g. through cams or toggle levers

Definitions

  • This invention relates to a pair of pliers or nippers incorporating multiple axes of rotation and, more particularly, to such nippers specially constructed for use in cutting toenails.
  • Plier-type cutters or nippers are well known in the prior art and have been employed for accomplishing a multitude of various functions. Particularly, these cutters or nippers are employed for household and garden use, such as cutting plants, three limbs, branches, stems, and the like, as well as wires, fastening nails, etc. In addition, such cutting pliers or nippers are also utilized by industry for cutting various components employed during manufacturing or production.
  • the prior art pliers typically incorporate a conventional construction having an elongated arm member incorporating a handle portion and a cutting portion, with both members being movable about an elongated arm member which incorporates a single pivot axis.
  • This construction is well known and has been universally employed in conventional cutting pliers and nippers.
  • each of the cooperating components must generally be constructed by forging or expensive production methods requiring subsequent machining such as milling, boring, stamping, and the like.
  • coatings such as chromium or nickel are also generally required in order to prevent galvanic deposition in connecting points. such as rivets and pivot joints.
  • such coatings generally only offer partial rust resistance or protection and, as a consequence, severe residual scale of soluble oil residues or hardening oils are not flushed out and do not provide permanent rust protection. As a result, premature wear and rust formation are generally associated with these prior art cutting pliers or nippers, causing such prior art systems to become useless.
  • a further problem found in the prior art is the complete lack of any toe nail nipper incorporating multiple axes of rotation.
  • no prior art nipper construction exists for use on toenails which enables the user to attain the required cutting force using reduced hand force.
  • This problem is particularly important to older individuals who experience reduced manual dexterity and strength, while also developing thicker toenails.
  • no prior art product exists to satisfy this need.
  • Another object of the present invention is to provide cutting pliers or nippers having the characteristic features described above which is easy to use and operate by all individuals, regardless of their manual strength.
  • Another object of the present invention is to provide cutting pliers or nippers having the characteristic features described above which provides the desired force compounding effect at the cutting blades while being specifically constructed for cutting toenails, thereby enabling older individuals to cut their toenails easily and conveniently.
  • a further object of the present invention is to provide a pair of cutting pliers or nippers having the characteristic features described above which prevents external contaminates and the user's fingers from contacting the internal operational components thereof, thereby assuring extended life and wear for the cutting pliers or nippers and preventing injury to the user.
  • the difficulties and drawbacks of the prior art are eliminated and a pair of pliers or nippers of increased utility is attained.
  • the pliers or nippers of this invention possess great robustness or inherent strength and utility due to the unique multi-rotational axis construction and the force compounding attained thereby.
  • the pliers or nipper construction of the present invention has been found to be particularly unique and useful as a toenail nipper, enabling individuals having reduced manual strength to easily and conveniently cut their toenails without requiring assistance from others.
  • the toenail nipper construction of the present invention is of particular importance and utility to individuals with advancing age. As individuals grow older, the toenails become thicker and, consequently, become increasingly more difficult to cut.
  • the present invention individuals with reduced hand strength are able to easily and conveniently cut toenails which have increased thickness, due to the force compounding attained by the nipper construction of the present invention and the ability.of the nippers of this invention to produce substantial cutting forces at the cutting edges of the jaws with a smaller force being required on the handles thereof than previously needed.
  • the handles comprise a universally applicable, palm-engaging shape which enhances their use and adds to the efficacy of the force compounding effect.
  • the pliers or nippers incorporate a pair of elongated arm members, each of which comprises a handle section and a force transmitting section.
  • the pair of elongated arm members are mounted to each other for cooperative, pivoting engagement about a common central pivot axis.
  • the handle section of each of the elongated arm members extends from the central pivot axis in a generally first direction, while the force transmitting sections of each elongated arm member extend in the opposite direction from the central pivot axis.
  • the pliers or nippers of this invention also incorporate a pair of jaw members, each of which com­prises a cutting or function-providing edge portion and a movement control portion, which forms a transitional region of the jaw member.
  • at least one elongated bar or fixing plate extends between the two jaw members, with each jaw member being connected to opposed ends thereof by jaw-holding pins or rivets.
  • two elongated bars or fixing plates may be employed.
  • each jaw member extends from each of the jaw holding pins or rivets in a first direction, while the movement control portion of each jaw member extends from the jaw-holding pins in the opposite direction. In this way, the jaw members are maintained in juxtaposed, spaced relationship in the precisely desired aligned, cooperating position.
  • the fixing plate also incorporates a cylindrical pin or ball positioned substantially mid-way therealong, between the jaw members.
  • This pin provides a jaw aligning and pressure receiving or bearing zone for the jaw members, while also establishing a secondary pivot axis for the jaw members.
  • the cylindrical pin extends substantially perpendicularly from the fixing bar and cooperatively engages both jaw members at their respective junctures of their cutting or function-providing portions and movement control portions.
  • the terminating end of the movement control portion of one jaw member is rotationally mounted to the terminating end of the force transmitting section of one of the elongated arm members, while the terminating end of the movement control portion of the second jaw member is rotationally mounted to the terminating end of the force transmitting section of the second elongated arm member. In this way, multi-axes of rotation are attained and the desired compound force generation is realized.
  • the securing means employed to rotationally interconnect the movement control portion of the jaw member to the force transmitting section of the arm member comprises removable securing means.
  • the jaw members are removably mounted to the arm member and easily replaced by any desired alternate jaw member.
  • the jaw members are made from hardened steel, in order to assure that the pliers or nipper construction is inherently strong and rigid for long term extensive use.
  • the handle sections of the elongated arm members are preferably formed from plastic or die casting.
  • the handle section preferably comprises a smoothly curved, rounded, eccentric shape which is easily held by the user, both comfortably and efficiently, while force is being applied and throughout its use.
  • This outer surface shape is particularly constructed to provide a universally employable palm-engaging configuration which positions the user's hand for maximum force application, while also being comfortable and natural.
  • each elongated arm member establishes the outer surface of each arm member, with the inside surface thereof comprising a substantially elongated, flat surface positioned in juxtaposed, spaced, facing relationship to the inside flat surface of the second handle sections.
  • handle sections are concentrically mounted to the central pivot axis, to pivot symmetrically therewith about the fixed, hinged pin construction.
  • each elongated arm member incorporates an impact point or pivot limiting abutment stop preferably positioned between the central pivot axis and the handle section, to provide a fixed terminating point for limiting the rotation of the arm members relative to the pivot axis.
  • the impact point or stop abutment surfaces also incorporate spring retaining zones formed therein in which a biasing spring is concealed for providing an outwardly biasing force to the handle members, causing said handle members to be biased outwardly, to provide enhanced ease of use and increased utility.
  • the precisely desired opening stroke is attained automatically upon release of the closing forces, thereby enabling the user to merely apply the required closing forces to attain the desired cutting force at the cutting edges of the jaw members.
  • a standard helical spring is employed in secure nested engagement in the spring receiving zones formed in each of the elongated arm members, directly adjacent the central pivot axis and the handle sections thereof.
  • a further advantageous development attained by the present invention is found in providing handles capable of being formed from plastic material, die-cast molding, or composite resin material.
  • handles capable of being formed from plastic material, die-cast molding, or composite resin material.
  • a peripherally surrounding shield or adapter and turn-lock safety fastener preferably formed as a separate component of the nippers.
  • the adapter and the turn-lock safety fastener peripherally encloses, secures and protects all moving internal functional parts of the nipper, completely eliminating the danger that individuals' fingers may become accidentally trapped in the internal components of the nippers.
  • the turn-lock fastener of the present invention the nippers will not spring open spontaneously if the pliers are dropped or incorrectly operated. Consequently, further use and user safety is attained.
  • any component made from plastic comprises fiber-reinforced material and in the case of components made from die casting, zinc or magnesium is preferably employed.
  • the peripherally surrounding shield or adapter is constructed to be removable from the pliers or nippers in order to enable the functional parts thereof to be interchangeable as well as permitting the cleaning and checking of the interior mechanism. This construction further enhances and increases the durability and utility of the present invention.
  • a multi-use system is attained in which standardized components can be produced on a modular principle, with a plurality of alternate jaw members being employable for changing from one type of pliers or nipper to an alternate jaw or functional component.
  • needle nose pliers, universal pliers, side-cutting inserts, etc. can all be constructed from one, single hand-held pair of pliers or nippers.
  • cutting pliers or nippers 100 of the present invention incorporate a pair of elongated arm members 102 and 103.
  • Arm member 102 incorporates a handle section 3 and a force transmitting section 18, while handle member 103 incorporates a handle section 3 and a force transmitting section 18′.
  • elongated arm members 102 and 103 are securely mounted to each other for cooperative, pivoting engagement about the axis defined by joint pin A.
  • handle section 3 of elongated arm members 102 and 103 extends from the central pivot axis defined by joint pin A in a generally first direction, while the force transmitting sections 18 and 18, of each elongated arm member extend in the opposite direction from joint pin A.
  • nippers 100 of the present invention also incorporate a pair of jaw members 105 and 106.
  • Jaw member 105 comprises a cutting or function-providing portion 4 and a movement control portion F, which forms the transitional region of jaw member 105.
  • jaw member 106 comprises a cutting or function-providing portion 4 and a movement control portion F′, forming the transitional region of jaw member 106.
  • the cutting or function-providing portions 4,4 of jaw members 105 and 106 extend in a first direction, while movement control portions F and F′ of jaw members 105 and 106 extends in the opposite direction.
  • the terminating end of movement control portion F of jaw member 105 is pivotally or rotationally mounted to the terminating end of force transmitting section 18 of arm member 102, by pin B.
  • the terminating end of movement control portion F′ of jaw member 106 is pivotally or rotationally mounted to the terminating end of force transmitting section 18′ of arm member 103 by pin B′.
  • pins B and B′ comprise removable pins, thereby enabling jaw members 105 and 106 to be removed from arm members 102 and 103 whenever desired.
  • other jaw member constructions or configurations are quickly and easily mounted to arm members 102 and 103.
  • an elongated bar or fixing plate E interconnects jaw members 105 and 106.
  • fixing plate E is mounted at each of its terminating ends to one of the jaw members by jaw holding or joint pins or rivets C and C′.
  • at least one fixing plate E is mounted to jaw member 105 by pin C, while the opposed end of fixing plate E is mounted to jaw member 106 by pin C′.
  • pins C and C′ preferably secure fixing plate E to jaw members 105 and 106 in a manner which allows both rotational and translational movement of jaw members 105 and 106 relative to the axes defined by pins C and C′.
  • jaw members 105 and 106 are positioned and securely maintained in juxtaposed spaced aligned relationship, lying in substantially a single plane, with fixing plate E securely interconnecting jaw members 105 and 106 in spaced, aligned planar relationship with each other, while being free to pivot and slide relative to the axis of the holding pins.
  • a steel ball or cylindrical pin D is securely retained and supportingly held substantially mid-way along fixing plate E, defining a jaw member aligning and pressure receiving or bearing zone, while also establishing the pivot axis for jaw members 105 and 106.
  • Steel ball or cylindrical pin D establishes the pivot axis for jaw members 105 and 106, while also providing a jaw member aligning and pressure receiving zone for providing the desired alignment and cooperative movement of jaw members 105 and 106 about the pivot axis established thereby.
  • two fixing plates may be mounted on opposed sides of the jaw members to further assure the maintenance of the desired aligned relationship.
  • jaw members 105 and 106 each comprise an arcuate cut-out portion formed in the inside edge thereof for peripherally surrounding pin D. In this way, jaw members 105 and 106 are securely held in the precisely desired position, and the cooperative movement of function-providing portion 4 of each jaw member is controllably assured.
  • the toenail nippers of the present invention are capable of being easily and conveniently employed by individuals with reduced manual strength to cut toenails, regardless of the thickness of the toenails.
  • the function-providing portions 4,4 of cutting pliers or nippers 100 incorporate a left-hand or a right-hand cutting blade.
  • Each blade is made up of the cutting-edge region SCH, running centrally from the tip S to the pressure-­receiving or thrust bearing zone D, with blade portions adjacent to each other, with both faces thereof lying in substantially the same plane, connected by fixing plate E and anchored using through-pins C and C′.
  • the back-edge region of each blade extends in a crescent shape formed along its outer front face as far as movement control portion or transitional region F and F′.
  • blade members or function-providing portions 4,4 are constructed with a substantially reduced thickness.
  • function-providing portions 4,4 are constructed with an overall thickness of about two thirds the thickness of conventional toenail nippers. In this way, the visibility of the area being trimmed or cut is substantially enhanced.
  • arm members 102 and 103 are pivotally mounted to each other, using conventional, overlapping, arcuate ring-shaped plates or an interlocking post in combination with a groove hinge pocket formed at the juncture of handle sections 3 and force transmitting sections 18 and 18′. This construction enables force transmitting sections 18, 18′ of arm members 102 and 103 to move away from each other as handle sections 3 are moved towards each other.
  • arm members 102 and 103 are preferably constructed from plastic or die-cast material, or a combination of both. Regardless of the material employed, arm members 102 and 103 each comprise a shank section 13 adjacent pivot pin A in handle section 3 which assures that the strength required is provided. Furthermore, handle section 3 of each arm member 102 and 103 is shaped to enable the user to easily attain a full, firm grip of both handle sections, while also being able to easily, comfortably and conveniently operate the handle sections to achieve the desired action at the jaw members.
  • the smoothly curved, round, eccentric shaped handle sections 3,3 of the elongated arm members 102 and 103 establish the outer surface of each arm member, with the inside facing surfaces thereof comprising substantially elongated, flat surfaces positioned in juxtaposed, spaced, facing relationship to each other.
  • the substantially flat surfaces of handle sections 3,3 define substantially straight lines.
  • each elongated arm member incorporates an impact point or pivot limiting stop abutment 9 which is preferably positioned between central pivot axis A and handle section 3, providing a fixed terminating point for limiting the rotation of the arm members about the pivot axis.
  • the impact point or stop abutment surface 9 of each arm member also incorporates a spring retaining zone 16/1 formed therein for retainingly supportingly holding biasing spring 16.
  • handle members 102 and 103 are provided with an outwardly biasing force, causing the handle members to be biased outwardly, when in a closed position, thereby enhancing the ease of use of the present invention.
  • spring member 16 comprises a standard helical spring positioned in secure, nested interengagement within retaining zones 16/1, with retaining zones 16/1 being positioned directly adjacent central pivot axis A and handle sections 3,3.
  • spring member 16 By employing spring member 16 the precisely desired open stroke position is attained automatically, upon release of the closing force. In this way, the user is merely required to apply the closing force needed to attain the desired cutting force at the cutting edges of the jaw members, without being required to separate the handle member for repeating the cutting process. In addition, by employing spring member 16 positioned in nested inter-­engagement in receiving and retaining zones 16/1, the opening stroke of pliers or nippers 100 is assured, and no adverse influence on the closing force required is realized.
  • each of the force transmitting sections 18 and 18′ is pivotally connected to the terminating end of one of the movement control portions F and F′ by hinge pins B and B′.
  • This construction in combination with the other pivot axes, achieves the force compounding, toggle-lever function attained by nippers 100 of this invention.
  • the central connection of this concentric arrangement is provided by the principal joint pin A with its hinge-like design (18 ⁇ in FIGURE 5), resulting in a fixed association between the shank sections 13,13 of handle portions 3,3 of arm members 102 and 103, and function providing portions 4,4 of jaw members 105 and 106.
  • the movement control portions or transitional region F and F′ are substantially flat and extend from their respective pivot axis B and B′ substantially parallel to each other toward the tip S.
  • the pressure applied position with handle sections closed, the transitional regions are splayed open and point at an acute angle to the straight line Y, FIGURE 2.
  • a cover or adapter 1 is constructed to assure that this inner splaying does not impair the cutting procedure, by spacing the inside adjacent surfaces of adapter 1 with sufficient breadth to assure that no contact or interference occurs between adapter 1 and movement control portions F and F′.
  • cutting pliers or nippers 100 of the present invention incorporate a protective cover or adapter 1 which peripherally surrounds and shields the multiple pivot axes of nipper 100. In this way, the difficulties encountered by prior art nippers from environmental contamination is completely eliminated.
  • cover or adapter 1 is manufactured from comparatively inexpensive material, such as plastic or die-cast metals in order to provide a safe, protective shield or cover which peripherally surrounds and encloses the multiple pivot axes of the nipper of the present invention, while being lightweight and comparatively inexpensive to produce.
  • adapter 1 incorporates a raised boss or pin 19 formed on an inside wall thereof, as depicted in FIGURES 1A and 6.
  • Pin 19 cooperatively engages with fixing plate E, to assure repeatability and consistency in securely positioning adapter 1 in the precisely desired location.
  • a turn-lock fastener 2 is mountable in adapter 1 for cooperative locking interengagement of handles 3 of arm members 102 and 103 in the closed position.
  • Turn-lock fastener 2 incorporates a radially extending or projecting stop lip 2/2 on the bottom portion thereof which securely, lockingly interengages about the turn-lock fastener bearing surface 22 of adapter 1.
  • projecting stop lip 2/2 is securely retained within overlapping flange 5 of adapter 1 in order to maintain turn-lock fastener 2 in rotating interengagement about bearing surface 22. In this way, the desired 90° rotation of turn-lock fastener 2 is assured, and the secure, fixed, locking interengagement of arm members 102 and 103 in the closed position is provided.
  • Handle section 3 of arm member 102 incorporates an upstanding pin or projection 17 located below central axis A, while handle section 3 of arm member 103 similarly comprises an upstanding pin or projection 17′ positioned below central pivot axis A.
  • upstanding projection 17 and 17′ of arm members 102 and 103 are preferably positioned between central pivot axis A and spring receiving recesses 16/1.
  • Turn-lock fastener 2 incorporates an elongated groove 2/3 formed on the bottom surface thereof which is positioned for cooperative engagement and disengagement with upstanding projection pins 17 and 17′.
  • pins 17 and 17′ are free to move within elongated groove 2/3 of turn-lock fastener 2.
  • groove 2/3 of turn-lock fastener 2 peripherally surrounds and lockingly holds upstanding projections 17 and 17 ⁇ , preventing handles 3 from moving outwardly from each other due to the spring forces of spring means 16.
  • arm members 102 and 103 are securely, lockingly held in the closed configuration, assuring both safety and positive locked retention in this position.
  • turn-lock fastener 2 also incorporates flute-like formations 6 formed on an outside surface thereof as a radially extending, outwardly projecting contact zone on face 8 of adapter 1, providing a readily accessible, easily employable surface by which turn-lock fastener 2 can be rotated between its two alternate positions.
  • a stop projection 7 is formed on face 8 of adapter 1, providing a positive stop for turn-lock fastener 2, preventing turn-lock fastener 2 from being unintentionally rotated during use and causing an interruption in the cutting procedure.
  • stop projection 7 is constructed to engage within arcuate slot 2/4 of turn-lock fastener 2 when turn-lock fastener 2 has been rotated into the open position. In this way, a positive, securely fixed position for turn-lock fastener 2 is attained, when in the open position, thereby preventing its accidental rotation into the closed position.
  • jaw members 105 and 106 are preferably prefabricated by known techniques, in order to obtain a secure, reliable, trouble-free jaw member.
  • both jaw members 105 and 106 comprise stainless steel and are preferably hardened and ground to obtain the desired reliable and dependable cutting action.
  • jaw members 105 and 106 are independently rotationally and translationally mounted to fixing plate E, while being mounted for pivotal movement about pivot-axis defining bearing surface D positioned therebetween.
  • jaw members 105 and 106 are mounted to plate E for both rotation and translation about their respective holding pins.
  • this construction assures that jaw members 105 and 106 are mounted to fixing plate E in a manner which assures jaw members 105 and 106 are incapable of twisting relative thereto, thereby assuring that the desired planar orientation of jaw members 105 and 106 is maintained.
  • the outer edges of function providing portions 4,4 of jaw members 105 and 106 incorporate swaged zones 21 ⁇ and 21. As best seen in FIGURE 5, swaged zones 21 ⁇ and 21 are formed on the outside edge of jaw members 105 and 106 in position for abutting contacting engagement with the upper edge of adapter 1.
  • blade facet 12 of each function providing portion 4 is offset from the cutting edge SCH and swaged obliquely at a precisely desired cutting angle shown in FIGURE 2 as X2-X.
  • This cutting angle is specifically designed to correspond to the travel distance of handle sections 3,3 of arm members 102 and 103 shown in FIGURE 2 as X1-X. In this way, the precisely desired relationship between these two angles is obtained, with the travel distance of handle sections 3,3 of arm members 102 and 103 being X1-X, while the corresponding cutting angle or travel distance between cutting edges SCH of jaw members 105 and 106 is X2-X.
  • the invention relates to a pair of pliers having in the working region steel inserts such as, for examples FIGURE 1 (4), cutting inserts and handles 3 of plastic or die-cast metal, receiving and transmission elements FIGURE 3 (18 and 18′) connected to the aforementioned and an adapter 1 with safety fastener 2, the adapter extending overlapping on all sides from the region of the inserts (cutting edges 4) via the transitional region FIGURE 3 F, the transmission region B and B′, spring region 16 as far as the centering region A, thus securing and protecting the entire movable internal mechanism, consequently the functional inserts freely movable in the insertion region 4, e.g.
  • FIGURE 1 stop cutting blades of steel, arranged adjacently, resting on flat and so as to hinge symmetrically and positioned and fittingly anchored on the left-hand and right-hand side by a fixing plate FIGURE 3 E by means of the joint pins C and C′ reaching through, and held (freely movably) centrally in the inner leading flank D (pressure zone) by a steel ball or a cylindrical pin.
  • the adapter checks this embedding region and all hinge-steel, plastic or die-cast connecting pins by its inner faces, running on flat, in the mechanism region.
  • the projecting stop in 19 stops and locks the adapter at the inner flank of the fixing plate and thus also guarantees the optimum mechanical sequence of motions as far as the turn-lock fastener bearing 22.
  • the symmetrical steel cutting-edge region 4, which lies on flat and is not offset, and the steel transitional region FIGURE 3 F and F′ extend in a receiving and transmission region 18 and 18′ sheathed in plastic or die-cast zinc and having a supported central pivot FIGURE 3 A, in which the principal joint pin 18 ⁇ , shaped like a hinge, fits at the inside of the receiving zone 18 and 18, and is locked by a cylindrical pin A.
  • jaw members 105 and 106 are pivotally mounted to arm members 102 and 103 by pins B and B′ in a manner which enables jaw members 105 and 106 to be removed from their respective pivotally engaged positions.
  • alternate jaw members are easily mounted to the same arm members for being pivotally interconnected with arm member 102 and 103 in substantially the identical position.
  • pliers or nippers 100 of the present invention can be quickly and easily converted for use with other function providing portions formed on the jaw members. Consequently, a plurality of jaw members with function providing portions such as clamps, needle nose pliers, side-cutting inserts, etc. can be employed with the same advantageous force compounding effects, while employing the same arm members 102 and 103.
  • alternate jaw member constructions are provided in fixed sets, with fixing plate E securely interconnecting the jaw members in the desired spaced, aligned, relationship.
  • jaw member aligning and pressure receiving and pivot axis establishing pin D is positioned between the jaw members to assure the smooth, continuous, trouble-free operation thereof when mounted to arm members 102 and 103.
  • pins B and B′ are preferably constructed as removable pin assemblies, thereby providing the desired jaw member removability easily and conveniently.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Scissors And Nippers (AREA)
  • Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)
EP19900304334 1989-05-03 1990-04-23 Pince ou tenailles avec axes de pivotement composés Withdrawn EP0396295A3 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE8905702U 1989-05-03
DE8905702 1989-05-03
US50893490A 1990-04-12 1990-04-12
US508934 1990-04-12

Publications (2)

Publication Number Publication Date
EP0396295A2 true EP0396295A2 (fr) 1990-11-07
EP0396295A3 EP0396295A3 (fr) 1991-09-18

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Application Number Title Priority Date Filing Date
EP19900304334 Withdrawn EP0396295A3 (fr) 1989-05-03 1990-04-23 Pince ou tenailles avec axes de pivotement composés

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001010610A1 (fr) * 1999-08-05 2001-02-15 Alterra Holdings Corporation Piece rapportee durcie pour outils coupants
EP1116454A1 (fr) * 2000-01-12 2001-07-18 Dino Rinaldi Outil pour l'hygiène et pour couper cuticules, ongles des mains et des pieds
FR2813033A1 (fr) * 2000-08-16 2002-02-22 Medic Instr Pince a becs interchangeables
AT501663A1 (de) * 2004-02-17 2006-10-15 Johann Friess Nagelschere
CN110583510A (zh) * 2019-10-11 2019-12-20 江苏农林职业技术学院 一种手持按压式半自动宠物猫指甲剪磨器

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US3680212A (en) * 1970-09-17 1972-08-01 Walter J Rozmus Pivot assembly for tools and the like
US4198749A (en) * 1978-04-05 1980-04-22 Utica Tool Company, Inc. Hand operated cutting tool

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001010610A1 (fr) * 1999-08-05 2001-02-15 Alterra Holdings Corporation Piece rapportee durcie pour outils coupants
US6725546B1 (en) 1999-08-05 2004-04-27 Alterra Holdings Corporation Hardened insert for cutting tools
EP1116454A1 (fr) * 2000-01-12 2001-07-18 Dino Rinaldi Outil pour l'hygiène et pour couper cuticules, ongles des mains et des pieds
US6473969B2 (en) 2000-01-12 2002-11-05 Dino Rinaldi Tool for the hygiene and cutting of cuticles, fingernails, and toe nails
FR2813033A1 (fr) * 2000-08-16 2002-02-22 Medic Instr Pince a becs interchangeables
AT501663A1 (de) * 2004-02-17 2006-10-15 Johann Friess Nagelschere
AT501663B1 (de) * 2004-02-17 2007-06-15 Johann Friess Nagelschere
CN110583510A (zh) * 2019-10-11 2019-12-20 江苏农林职业技术学院 一种手持按压式半自动宠物猫指甲剪磨器

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