US3496807A - Tweezers - Google Patents

Tweezers Download PDF

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Publication number
US3496807A
US3496807A US694011A US3496807DA US3496807A US 3496807 A US3496807 A US 3496807A US 694011 A US694011 A US 694011A US 3496807D A US3496807D A US 3496807DA US 3496807 A US3496807 A US 3496807A
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US
United States
Prior art keywords
jaw
jaws
legs
tool
leg
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.)
Expired - Lifetime
Application number
US694011A
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English (en)
Inventor
Price D Jones
Sidney W Ploeckelmann
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.)
Swiss American Precision Imports Inc
Original Assignee
Swiss American Precision Imports Inc
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 Swiss American Precision Imports Inc filed Critical Swiss American Precision Imports Inc
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Publication of US3496807A publication Critical patent/US3496807A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B25B9/00—Hand-held gripping tools other than those covered by group B25B7/00
    • B25B9/02—Hand-held gripping tools other than those covered by group B25B7/00 without sliding or pivotal connections, e.g. tweezers, onepiece tongs

Definitions

  • the device is a tweezers or tool particularly constructed and adapted for picking up and handling thin, fragile objects such as silicon wafers.
  • the leg portions of the tweezers may be of generally conventional construction, the noses or jaws of the tweezer parts or leg being particularly configurated for the purpose intended.
  • the jaws include one jaw which is offset from its leg and having an extended tapering nose tapering to a knife edge, the taper being on the inside of the jaw and the other side of the jaw being flat adapting it to engage a flat horizontal surface.
  • the other jaw comprises a jaw in an angular position with respect to its leg located so that when the jaws are brought together this jaw is in a position adjacent to the-offset of the other jaw, whereby the object can be grasped between the jaws at a position adjacent to the offset and at the edge of the object.
  • the device of the invention is an improved tweezers or tool particularly adapted and configurated for the handling of thin, fragile objects such as, for example, silicon wafers that may have electrical circuitry etched thereon.
  • the tweezers or tool is particularly adapted for picking up such objects or items from a fiat horizontal surface without scratching the etched circuitry beyond A3 inch from the outer edge of the object or wafer.
  • the legs of the tweezers or tool may be of generally conventional construction, either having intermediate crossing portions or not having intermediate crossing portions.
  • the tool legs have intermediate crossing portions, when the handle portions of the legs are pressed together the jaws open and the jaws close when these portions are released.
  • the improvement of the invention resides particularly in the form and configuration of the jaws, at the ends of the legs of the tool or tweezers.
  • these jaws comprise a first jaw on one leg which is offset from the leg and which has an extending jaw portion which is tapered to a knife edge, the taper being on the inside of the jaw and the other side of the jaw being flat for engaging a flat horizontal surface.
  • the other jaw is positioned at an angle to its leg and located so that when the jaws close this jaw comes into a position generally parallel to the offset of the other jaw and in a position to grasp the edge of the object between the jaws.
  • This type of configuration of the jaws greatly facilitates picking up, or scooping thin delicate object such as silicon wafers from a fiat horizontal surface on which they may be lying.
  • the primary object of the invention is to facilitate this particular purpose in picking up and handling objects of this type.
  • the offset in the lower jaw that is, the portion which offsets the jaw itself from the leg, provides a shoulder or stop which prevents scratching of the upper surface of the wafer beyond A; inch from the edge during its handling.
  • the jaws are relatively wide, providing relanited States Patent tively wide positive contacting area to thereby prevent damage and cracking of the delicate or fragile wafer or object, and whereby the object may be held firmly in any position at any time.
  • the realization of this end constitutes a further object of the invention.
  • FIGURE 1 is a perspective view of a preferred form of the invention.
  • FIGURE 2 is a side view of the jaws of the tweezer or tool of FIGURE 1.
  • FIGURE 3 is a view like FIGURE 2 illustrating the picking up or scooping of a thin fragile wafter.
  • FIGURE 4 is a sectional view through the jaws of the tweezer or tool of FIGURES 1 to 3, illustrating the offset of the jaws.
  • FIGURE 5 is a perspective view of a slightly modified form of tool, wherein the legs are of slightly different configuration.
  • FIGURE 6 is a sectional view through the offset jaws of the tool or tweezers of FIGURE 5.
  • FIGURE 7 is a perspective view of a modified form of tool or tweezers wherein the legs have intermediate crossed portions so that the jaws open upon applying pressure to the legs.
  • FIGURE 8 is a side view of the tool of FIGURE 7 illustrating the grasping of a thin wafer.
  • FIGURE 9 is a view like that of FIGURE 8 showing the jaws closed on the wafer.
  • FIGURE 10 is a sectional view through one leg of the tool or tweezers of FIGURE 9.
  • numeral 10 designates a preferred form of the tool or tweezers having legs 12 and 14 which are similar and generally symmetrical and having different forms of jaws at their ends.
  • the legs may be made from a non-magnetic, stainless, acid-resistant steel.
  • the legs are joined at the end opposite the jaws, preferably by spot welding at the area designated by the numeral 16.
  • FIGURES 2, 3 and 4 illustrate the configuration of the jaws of the tool.
  • the legs 12 and 14 at the jaw ends are tapered as shown at 18 and 20, the sides of the tapered parts being generally arcuate.
  • the jaw 24 At the end of the tapered part 18 is the jaw 24 which has a portion having the same width as the end portion of the tapered part 18 and positioned at an angle, substantially a right angle, relative to the leg 12.
  • the jaw 26 At the end of the tapered part 20 of the leg 14 is the jaw 26.
  • This jaw is at the end of an offset portion 28 which is at an angle of substantially degrees to the tapered end toward 20 of the leg 14.
  • the jaw 26 At the end of the offset or offset portion 28 is the jaw 26 which has a width the same as the width of the end part of the tapered portion 20.
  • the upper side of this jaw is tapered as shown at 32 to a knife edge 34 at its end.
  • the lower surface of this jaw as designated at 36 is flat adapting it to be placed flat against a horizontal surface or table as shown.
  • the jaw of 24 is approximately parallel to the offset or offset portion 28 and spaced therefrom as shown.
  • the offset 28 provides a stop or shoulder preventing the jaws from engaging the flat, delicate object or wafer such as shown at 40 more than approximately inch inwardly from the edge thereof.
  • FIGURE shows a slightly modified form of the invention, wherein the jaws of the tool are like those of FIGURES 1 to 4.
  • the legs in this form of the invention are slightly different, however.
  • the upper leg 42 has a configuration as shown in FIGURE 5, having an intermediate outwardly bowed and ribbed or knurled part 44.
  • the lower leg 46 is generally symmetrical except for the jaw part having a similar intermediate outwardly bowed and ribbed or knurled part 48.
  • the operation of the tool or tweezers of FIGURE 5 is similar, the jaws coming together for grasping a thin, fragile object when pressure is applied to the legs, that is, when the legs are squeezed together.
  • FIGURE 5 shows the tool scooping or picking up a postage stamp 50.
  • the jaws in the tool of FIGURES 7 to 10 are like those of the previous embodiment.
  • the tool has a leg 60 and another leg 62.
  • the leg 60 has an intermediate angular narrowed offset part 64 joined to tapered end part 66, at the end of which is the jaw 26.
  • the offset part 64 has a cut out portion 70 positioned at the intermediate area where the legs cross each other.
  • the leg 62 has a similar angular offset 64 connected to tapered end portion 72 at the end of which is the jaw 24.
  • the angular offset part 64 has in it a cut out 70', the two cut outs being adjacent to each other at the intermediate part of the legs where they cross.
  • FIGURES 7 to 10 The operation of the tool of FIGURES 7 to 10 is similar to that of the previous embodiments.
  • this form of the invention as illustrated in FIGURES 8 and 9, when the legs 60 and 62 are squeezed together the jaws separate as illustrated in FIGURE 8, by reason of the legs having the offsets therein and their crossing each other at an intermediate point. When pressure is released on the legs, the jaws come together as shown in FIGURE 9 for grasping of fragile objects.
  • the form of the invention as shown in FIGURES 7 to 10 accomplishes the same objects and has advantages similar to those of the previous embodiment.
  • a tweezer tool comprising:
  • one of said legs having an offset portion adjacent its free end, extending generally laterally thereof away from the other leg and defining a shoulder facing said free end;
  • first jaw at the outer end of said offset portion, said jaw being of substantial width and extending generally perpendicular thereto and having upper and lower opposed flat faces tapering toward each other to define a knife edge at the outer end thereof;
  • the other leg having a second jaw portion at its free end extending laterally thereof toward said one leg outwardly of and generally parallel to said shoulder and having a broad end surface, said second jaw portion being of such length that its end surface may engage the upper of said faces when said free ends are moved together.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)
US694011A 1967-12-08 1967-12-27 Tweezers Expired - Lifetime US3496807A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US69401167A 1967-12-08 1967-12-08

Publications (1)

Publication Number Publication Date
US3496807A true US3496807A (en) 1970-02-24

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Family Applications (1)

Application Number Title Priority Date Filing Date
US694011A Expired - Lifetime US3496807A (en) 1967-12-08 1967-12-27 Tweezers

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US (1) US3496807A (de)
CH (1) CH462067A (de)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3981527A (en) * 1975-04-07 1976-09-21 Interconsal Associates, Inc. Tweezers for use with semi-conductor wafers
US4009899A (en) * 1975-10-16 1977-03-01 Fluoroware, Inc. Wafer tongs
USRE30124E (en) * 1975-04-07 1979-10-23 Interconsal Associates, Inc. Tweezers for use with semi-conductor wafers
US4410209A (en) * 1982-03-11 1983-10-18 Trapani Silvio P Wafer-handling tool
US4717190A (en) * 1986-10-30 1988-01-05 Witherspoon Linda L Wafer handling and placement tool
US4799326A (en) * 1986-12-08 1989-01-24 Mertens Miles A Fish hook eye cleaner
US4892333A (en) * 1987-06-04 1990-01-09 Krulich Ronald F Window pocket insertion device and method of use therefor
USD326803S (en) 1990-09-10 1992-06-09 Studex, Inc. Tweezer
US5176701A (en) * 1988-05-27 1993-01-05 Jarmila Dusek Medical forceps instrument for implanting intraocular lenses
US20100004678A1 (en) * 2006-08-18 2010-01-07 Valeria Querol Garica Ambidextrous grasping system for a medical instrument
JP6452773B1 (ja) * 2017-09-18 2019-01-16 重行 判谷 挟持具

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US450266A (en) * 1891-04-14 Surgical instrument
US745071A (en) * 1903-03-21 1903-11-24 William Frank Mckibben Instrument for holding artificial teeth.
US784803A (en) * 1904-11-16 1905-03-14 Alexander M Moylan Combined pan and stove-lid lifter.
US3218696A (en) * 1964-05-06 1965-11-23 Dritz Arthur Zipper repair tool

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US450266A (en) * 1891-04-14 Surgical instrument
US745071A (en) * 1903-03-21 1903-11-24 William Frank Mckibben Instrument for holding artificial teeth.
US784803A (en) * 1904-11-16 1905-03-14 Alexander M Moylan Combined pan and stove-lid lifter.
US3218696A (en) * 1964-05-06 1965-11-23 Dritz Arthur Zipper repair tool

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3981527A (en) * 1975-04-07 1976-09-21 Interconsal Associates, Inc. Tweezers for use with semi-conductor wafers
USRE30124E (en) * 1975-04-07 1979-10-23 Interconsal Associates, Inc. Tweezers for use with semi-conductor wafers
US4009899A (en) * 1975-10-16 1977-03-01 Fluoroware, Inc. Wafer tongs
US4410209A (en) * 1982-03-11 1983-10-18 Trapani Silvio P Wafer-handling tool
US4717190A (en) * 1986-10-30 1988-01-05 Witherspoon Linda L Wafer handling and placement tool
US4799326A (en) * 1986-12-08 1989-01-24 Mertens Miles A Fish hook eye cleaner
US4892333A (en) * 1987-06-04 1990-01-09 Krulich Ronald F Window pocket insertion device and method of use therefor
US5176701A (en) * 1988-05-27 1993-01-05 Jarmila Dusek Medical forceps instrument for implanting intraocular lenses
USD326803S (en) 1990-09-10 1992-06-09 Studex, Inc. Tweezer
US20100004678A1 (en) * 2006-08-18 2010-01-07 Valeria Querol Garica Ambidextrous grasping system for a medical instrument
JP6452773B1 (ja) * 2017-09-18 2019-01-16 重行 判谷 挟持具
WO2019053914A1 (ja) * 2017-09-18 2019-03-21 重行 判谷 挟持具
CN110809417A (zh) * 2017-09-18 2020-02-18 判谷重行 夹具
EP3685698A4 (de) * 2017-09-18 2021-09-01 Simian Ltd. Greifer
US11344096B2 (en) 2017-09-18 2022-05-31 Simian Ltd. Tweezers

Also Published As

Publication number Publication date
CH462067A (de) 1968-08-31

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