US3401739A - Apparatus to be used with ingots - Google Patents

Apparatus to be used with ingots Download PDF

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Publication number
US3401739A
US3401739A US602901A US60290166A US3401739A US 3401739 A US3401739 A US 3401739A US 602901 A US602901 A US 602901A US 60290166 A US60290166 A US 60290166A US 3401739 A US3401739 A US 3401739A
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Prior art keywords
piston
ram
cylinder
conduit
auxiliary
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US602901A
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English (en)
Inventor
Opletal Bohuslav
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CHEPOS SDRUZENI CHEMICKEHO A P
CHEPOS SDRUZENI CHEMICKEHO A POTRAVINARSKEHO STROJIRENSTVI
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CHEPOS SDRUZENI CHEMICKEHO A P
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
    • B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
    • B66C1/42—Gripping members engaging only the external or internal surfaces of the articles
    • B66C1/425—Gripping members engaging only the external or internal surfaces of the articles motor actuated
    • B66C1/427—Gripping members engaging only the external or internal surfaces of the articles motor actuated by hydraulic or pneumatic motors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D29/00—Removing castings from moulds, not restricted to casting processes covered by a single main group; Removing cores; Handling ingots
    • B22D29/04—Handling or stripping castings or ingots
    • B22D29/06—Strippers actuated by fluid pressure

Definitions

  • the apparatus of the invention includes a support means that has a main cylinder in which a main piston is slidable, said main cylinder extending vertically during use of the apparatus with the main piston which is slidable in the main cylinder being fixed to a piston rod that extends upwardly beyond the main cylinder and carries at its upper end a suspending means by which the piston rod and all of the remaining structure of the invention is suspended from a suitable lifting and lowering device, such as a crane.
  • the main piston carries a nonreturn valve means which provides for flow of fluid from the space in the main cylinder beneath the main piston to the space in the main cylinder over the main piston, while preventing flow of fluid in the reverse direction from the space over the main piston to the space beneath the latter.
  • a lower conduit communicates with the space in the main cylinder beneath the main piston, and a reservoir which contains a suitable hydraulic liquid is in permanent communication with the lower conduit which communicates permanently with the space in the main cylinder beneath the main piston therein.
  • An upper conduit communicates permanently with the space in the main cylinder over the main piston, and a second nonreturn valve means is carried by and coacts with this upper conduit to provide for flow of fluid out of the space in the main cylinder over the main piston and through the upper conduit, while preventing flow of fluid in the reverse direction through the upper conduit into the space over the main piston.
  • the present invention relates to apparatus which is to be used with ingots.
  • it relates to an apparatus which may be used for stripping ingot molds from ingots as well as for transporting ingot molds and ingots.
  • the apparatus of this invention is particularly adapted for use with a lifting and lowering device, such as a crane which has a lifting capacity suflicient to carry the apparatus of the invention as well as the ingot and mold.
  • a primary object of the present invention is to provide a stripping apparatus capable of stripping an ingot mold from an ingot while operating exclusively in response to lifting and lowering movements of a crane or the like from which the apparatus of the invention is suspended.
  • Another object of the invention is to provide a device of the referred to type which is completely self-contained with its own closed hydraulic circuit and which is capable of automatically controlling the moving parts of the device in response to lifting and lowering movements.
  • a further object of the invention is to provide a device of the aforementioned type which is simple in construction and can be operated in a simple manner that does not require the use of any separate control assemblies.
  • a releasable holding means is provided to act on a part 3,401,739 Patented Sept. 17, 1968 which is to be worked on by the apparatus of the invention, and this releasable holding means is displaceable between a holding position holding this part and a release position releasing the latter part.
  • An auxiliary cylinder is carried by the support means, and an auxiliary piston is slidable in the auxiliary cylinder and carries an auxiliary piston rod which coacts with the releasable holding means for displacing the latter between its release and holding positions in response to movement of the auxiliary piston and auxiliary cylinder one with respect to the other.
  • An auxiliary conduit communicates with the auxiliary cylinder to direct fluid into and out of the latter during movement of the auxiliary piston in opposite directions therein.
  • a return flow conduit communicates with the reservoir, and a distributing valve means of the invention communicates with the upper conduit, the auxiliary conduit, and the return flow conduit to provide in one position of the distributing valve means communication between the upper conduit and the auxiliary conduit, while preventing communication between the auxiliary conduit and the return flow conduit, so that during a reduction in the volume of the space in the main cylinder over the main piston therein the fluid will flow from the upper conduit through the distributing valve means into the auxiliary conduit to actuate the auxiliary piston.
  • the distributing valve means has another position where it places the auxiliary conduit in communication with the return flow conduit while cutting ofl communication between the auxiliary conduit and the upper conduit, so that at this time fluid can return from the auxiliary cylinder to the reservoir.
  • a ram cylinder is also carried by the support means, this ram cylinder being situated at an elevation lower than the main cylinder and having in its interior a ram piston to which a ram means is fixedly connected, this ram means extending downwardly beyond the ram cylinder to the exterior thereof and pressing against a part which is to be worked upon by the apparatus of the invention during an increase in the volume of the space in the ram cylinder that is situated over the ram piston.
  • the space in the ram cylinder beneath the ram piston communicates with the outer atmosphere, and a ram conduit communicates with the space in the ram cylinder over the ram piston and with the distributing valve means to receive fluid from the upper conduit through the distributing valve means when the latter is in its position providing communication between the auxiliary conduit and the return flow conduit, so that at this time fluid will flow from the space in the main cylinder over the main piston into the space in the ram cylinder over the ram piston.
  • the distributing valve means when the distributing valve means is in its position providing communication between the upper conduit and the auxiliary conduit, the distributing valve means simultaneously places the ram conduit in communication with the return flow conduit, so that at this time the fluid can flow out of the space in the ram cylinder over the ram piston and back to the reservoir.
  • An actuating means is operatively connected on the one hand to the distributing valve means and on the other hand to the main piston rod for displacing the distributing valve means between its positions in response to movement of the main piston rod through a given stroke.
  • FIG. 1 is a sectional front elevation of one embodiment of a stripping apparatus according to the invention, this embodiment being adapted for stripping ingot molds from ingots where the ingot and mold taper so as to have upper ends which are smaller than the lower ends;
  • FIG. 2 is a fragmentary side elevation of the structure of FIG. 1;
  • FIG. 3 is a schematic illustration of the manner in which the structure of FIGS. 1 and 2 operates, the parts being shown during connection of the apparatus of the invention to an ingot mold;
  • FIG. 4 shows the position which the parts of FIG. 3 take, also in a schematic manner, during actual stripping of the mold from the ingot;
  • FIG. 5 is a partly sectional front elevation of a second embodiment of a stripping device in accordance with the invention, this embodiment being adapted for use with an ingot and mold assembly which have upper ends larger than the lower ends;
  • FIG. 6 is a partly sectional side elevation of the structure of FIG. 5;
  • FIG. 7 is a schematic representation of the manner in which the embodiment of FIGS. 5 and 6 operates during connection of the apparatus of the invention to an ingot;
  • FIG. 8 shows schematically the position which the parts of FIGS. 5-7 take during actual stripping of the mold from the ingot.
  • FIG. 9 shows details, a ratchet and pawl arrangement and a distributing valve means and is explanatory of the connection of the ratchet to the distributing valve means.
  • the apparatus illustrated in FIGS. 1 to 4 includes a support means S which includes a main cylinder 5 that extends vertically during use of the apparatus.
  • a main piston 3 is slidable within the main cylinder 5.
  • a piston rod 2 is fixed to the main piston 3 and extends therefrom in a fluid-tight manner through the top wall of the cylinder 5 to an elevation above the latter where the upper end of the piston rod 2 is fixed to a suspending means 1 by means of which the entire apparatus is suspended from a lifting and lowering device C which may take the form of a crane having a hook to which the suspending means 1 can be attached.
  • this suspending means 1 may take the form of a suitable shackle, eye, or the like, fixed to the top end of the piston rod 2 and receiving a hook of the lifting and lowering device C.
  • the piston 3 carries a nonreturn valve means 4 which provides for flow of hydraulic liquid or other suitable fluid from the space in the main cylinder 5 beneath the piston 3 therein to the space in the main cylinder 5 over the main piston 3, while this nonreturn valve means 4 prevents the reverse flow of fluid from the space over the piston 3 to the space beneath the latter.
  • a lower conduit 30 is in permanent communication with the space in the cylinder 5 beneath the piston 3 therein, and a reservoir 6 which surrounds the main cylinder 5 and which is carried by the support means S is in permanent communication with the lower conduit 30, as shown particularly in a schematic manner in FIGS. 3 and 4. In this way, in response to movement of the piston 3 and cylinder 5 one with respect to the other liquid can flow freely at any time into and out of the space in the cylinder 5 beneath the piston 3.
  • An upper conduit 32 communicates with the space in the main cylinder 5 over the piston 3 therein, and this upper conduit 32 carries a nonreturn valve means 19 which provides for flow of fluid out of the space in the cylinder 5 over the piston 3 and through the upper conduit 32.
  • the nonreturn valve means 19 prevents the reverse flow of fluid from the upper conduit 32 into the main cylinder 5.
  • a ram cylinder 7 is fixedly carried by the support means S, and in the embodiment of FIGS. 14, this ram cylinder 7 is coaxial with the main cylinder 5 while being situated at an elevation lower than the main cylinder 5.
  • a ram piston 8 is slidable in the ram cylinder 7, and a ram means 9 takes the form of a piston rod fixed to and extending from the piston 9 in a fluid-type manner through and beyond the bottom end of the ram cylinder 8, the lower end of the ram means 9 being adapted to directly engage and press against the top end of the ingot 21.
  • a ram conduit 34 communicates permanently with the space in the ram cylinder 7 over the ram piston 8, while the space in the ram cylinder 7 beneath the piston 8 communicates permanently with the outer atmosphere as, for example, through an opening 36 shown in FIG. 3 and 4.
  • the support means S also carries a releasable holding means H for releasably holding a part which is to be worked on by the apparatus of the invention, this part being the ingot mold 20 in the example of FIGS. 1-4.
  • the ingot mold 20 has at its top end a pair of opposed lugs 38 which are engaged by the releasable holding means H.
  • This releasable holding means includes a pair of bell crank levers pivotally carried by a pair of opposed extensions which project from opposite sides of the cylinder 7, which forms part of the support means S.
  • Each of these bell cranks of the releasable holding means includes a lever arm 10 of a substantially U-shaped configuration having a lower end portion adapted to extend beneath and engage a lug 38, and each of the bell cranks has an upper arm 11 which extends substantially horizontally, these arms being disposed at opposite sides of the cylinder 7 with the latter extending between the arms 11 of the pair of bell cranks.
  • the bell cranks include projections 12, respectively, fixed to the arms 10 thereof and adapted to engage the upper end face of the mold 20 at opposed parts thereof, as described below.
  • the support means S fixedly carries over the pair of arms 11 of the pair of bell cranks a pair of auxiliary cylinders 13 which respectively have auxiliary pistons 14 slidable therein, and these pistons 14 are respectively fixed with a pair of auxiliary piston rods 40 the bottom ends of which engage the arms 11, respectively.
  • An auxiliary conduit 42 communicates with each auxiliary cylinder 13 and more particularly with the space therein situated over the auxiliary piston 14, while the space in each cylinder 13 beneath the piston 14 communicates with the outer atmosphere, as through an opening 44 shown in FIG. 3.
  • a distributing valve means 15 is carried by the support means S directly next to the reservoir 6, and this distributing valve means 15, in addition to communicating with the upper conduit 32, the ram conduit 34, and the auxiliary conduit 42, communicates with a return flow conduit 46 which. is in permanent communication with the reservoir 6 for the hydraulic liquid.
  • This distributing valve means 15 is displaceable between the positions thereof shown in FIGS. 3 and 4. In the position of FIG. 3 the distributing valve means 15 places the upper conduit 32 in communication with the auxiliary conduit 42, while the ram conduit 34 communicates with the return fiow conduit 46, and in the position of FIG. 4 the distributing valve means 15 places the auxiliary conduit 42 in communication with the return flow conduit 46 while at the same time placing the upper conduit 32 in communication with the ram conduit 34.
  • An actuating means A is provided for automatically actuating the distributing valve means 15 so as to successively displace it between the positions thereof shown in FIGS. 3 and 4.
  • This actuating means A includes a ratchet wheel 16 which is operatively connected with the rotary valve member of the distributing valve means 15 and which is situated at the exterior of the latter, as shown in FIG. 1.
  • a pawl 18 coacts with the ratchet wheel 16 and is carried by the lower end of one of a plurality of guide bars 17 which are fixed to and extend downwardly from the suspending means 1, these bars being guided through suitable openings in a flange projecting from the top end of the main cylinder 5, as shown in FIG. 1.
  • the actuating means A is connected on the one hand to the distributing valve means 15 and on the other hand to the main piston rod 2 so that in response to a given stroke of the latter the actuating means will displace the distributing valve means 15 between its positions.
  • FIG. 1 it will be seen that when the piston rod 2 has been lowered sufliciently the pawl 18 will engage the ratchet wheel 16 and turn it through an increment which will displace the distributing valve means 15 between the positions thereof shown in FIGS. 3 and 4.
  • the apparatus of the invention is suspended by the suspending means 1 on a lifting and lowering device C, such as on the hook of a suitable crane, as indicated schematically at the upper part of FIG. 1.
  • a lifting and lowering device C such as on the hook of a suitable crane, as indicated schematically at the upper part of FIG. 1.
  • the main cylinder 5 will simply slide downwardly along the main piston 3, and since the non-return valve means 4 is closed at this time liquid will flow from the reservoir 6 through the lower conduit 30 into the space of the cylinder 5 beneath the piston 3 so as to fill the space in the cylinder 5 beneath the piston 3 during an increase in the volume of this latter space.
  • the distributing valve means 15 in the position of FIG.
  • the apparatus of the invention is then lowered onto a mold 20 with the ram means 9 aligned with the top end of the ingot 21.
  • the ram 9 engages the ingot 21
  • the ram 9 and the ram piston 8 will remain stationary while the ram cylinder 7 together with the support means S and the main cylinder 5 are lowered so that the space in the ram cylinder 7 above the ram piston 8 diminishes in its volume and the liquid at this time is displaced out of this latter space through the ram conduit 34 and the distributing valve means 15, which still has the position of FIG. 3, into the return flow conduit 46 and thus back into the reservoir 6.
  • the operator can simply lower the piston 3 in the cylinder 5 so as to displace liquid through the nonreturn valve means 4 into the space over the piston 3, and this operation will take place because the nonreturn valve means 19 prevents fluid from entering through the conduit 32 into the cylinder 5.
  • care is taken at this time to lower the piston rod 2 through a stroke which is too short to provide for displacement of the distributing valve means 15, so that the parts will remain in the position of FIG. 4.
  • FIGS. 1-4 can also be used simply to transport molds 20 in which case the ram means 9 would simply remain in its position extending from the cylinder 7 without engaging any ingot and the structure otherwise operating in the manner described above.
  • the structure can be designed simply as a mold transporting device, omitting the ram structure. In this event when the parts have the position of FIG. 4 and a mold has been transported to a desired location the piston rod 2 can be lowered until the actuating means A displaces the valve means 15 to the position of FIG.
  • FIGS. 5-8 The embodiment of FIGS. 5-8 is adapted to be used with ingots and molds whose upper ends are larger than their lower ends, these ingots 21 having a dead head at its upper end.
  • the releasable holding means H is in the form of a lazy tongs composed of the linkage which has upper links pivotally connected to the support means S and which have lower shear-type links pivotally connected by a vertically displaceable pivot pin which is connected to the bottom end of the piston rod 14a which projects from the auxiliary piston 14 in this embodiment.
  • the pair of piston rods 14a are pivotally connected to opposite ends of the vertically displaceable pin of the lazy-tongs 10'.
  • ram conduit 34 of this embodiment communicates with both of the cylinders 7 over the pistons 8, respectively, and in addition it will be noted from FIGS. 7 and 8 that in this embodiment the ram conduits 34 branch from the auxiliary conduits 42 which communicate with the spaces in the cylinders 13 over the pistons 14 therein.
  • This embodiment also has additional auxiliary conduits 50 respectively communicating with the spaces in the cylinders 13 beneath the pistons 14 and with the distributing valve means 15, so that in this embodiment the cylinders 13 and pistons 14 are double-acting.
  • FIGS. 58 is the same as that of FIGS. 1-4 and operates in the following manner:
  • the apparatus is now lowered onto a mold with the pair of ram means 9 engaging the top end of the mold at opposed parts thereof, and as the cylinders 7 move downwardly with respect to the pistons 8 the fluid is displaced through the ram conduits 34 and the distributing valve means 15 along the return flow conduit 46 back to the reservoir 6.
  • the piston rod 2 continues to move down so that the actuating means A actuates the distributing valve means 15 to displace it from the position of FIG. 7 into the position of FIG. 8.
  • the ingot 21 is stripped from the mold 241 and can be transported to any desired location after which the crane is again lowered so as to displace the piston rod 2 downwardly to cause the actuating means A to return the distributing valve means 15 to the position of FIG. 7, whereupon during the subsequent upward movement of the piston rod 2 the releasable holding means H will be returned to its release position releasing the ingot. Now the above operations can be repeated.
  • the diameters of the cylinders 5 and 7 and of rod 2 are selected so as to provide a proper the development of the force required to clamp and strip the mold therefrom. This force is automatically by the weight of the apparatus, that of the mold and ingot, without the use of the piston ratio for the ingot developed including any other driving structure. All of the stripping operations are brought about exclusively by the up and down movements of the lifting and lowering device C, which can be any suitable crane. Thus, the operation of the apparatus of the invention is exceedingly simple, and its structure is inexpensive.
  • the apparatus can be suspended from any standard lifting and lowering device. It can easily be removed from the crane which can then be used for other purposes.
  • the crane can be provided with a turnable frame so that with the apparatus of the invention the molds can be turned, and thus a very expensive stripper crane can be replaced by the apparatus of the invention. It is apparent that the structure of the invention will save considerable investment as well as handling and maintenance costs.
  • FIGS. 5-8 also can be used only with the releasable holding means H and the auxiliary cylinders 13 and pistons 14 for actuating the releasable holding means, in which case the ram assemblies can either be omitted or simply not used.
  • the lazy tongs can simply be used for transporting ingots.
  • the tongs can be placed in the open position of FIG. 7 in the manner described above and lowered onto an ingot.
  • the subsequent raising of the piston rod 2 will result in automatic gripping of the ingot which can then be transferred to any desired location.
  • the apparatus is lowered so that the distributing valve means 15 will be returned to the position of FIG. 7, thus resulting during subsequent raising of the piston rod 2 in opening of the tongs 10 and release of the ingot.
  • support means including a main cylinder which extends substantially vertically during use of the apparatus
  • nonreturn valve means carried by said main piston and providing communication between spaces in said main cylinder above and below said main piston, said nonreturn valve means providing for free flow of fluid from the space in said main cylinder beneath said main piston to the space in said main cylinder over said main piston during movement of said main piston and main cylinder one with respect to the other in a direction which reduces the volume of the space beneath said main piston while increasing the volume of the space thereover, said nonreturn valve means preventing flow of fluid from the space over said main piston back to the space beneath said main piston during movement of said main piston and main cylinder one with respect to the other in a direction which reduces the volume of the space over (f) a lower conduit (1) an auxiliary piston slidable said main piston while the volume therebeneath increases,
  • second nonreturn valve means operatively con-
  • releasable holding means for releasably holding a part which is to be worked on by the apparatus, said releasable holding means being carried by said support means and being displaceable between a holding position where said releasable holding means securely holds the part and a release position where said releasable holding means releases the part,
  • auxiliary piston rod fixed to said auxiliary piston and extending therefrom outwardly beyond said auxiliary cylinder
  • said auxiliary piston rod coacting at the exterior of said auxiliary cylinder with said releasable holding means for displacing the latter from one to the other of said positions thereof during movement of said auxiliary piston and said auxiliary cylinder one with respect to the other in one direction
  • auxiliary conduit communicates with the space in said auxiliary cylinder which is situated over said auxiliary piston, the space in said auxiliary cylinder beneath said auxiliary piston communicating with the outer atmosphere and said auxiliary conduit when receiving fluid from said upper conduit directing the fluid into said space of said auxiliary cylinder over said auxiliary piston to actuate said auxiliary piston rod to move said releasable holding means from said holding to said release position thereof.
  • said releasable holding means includes at least one bell crank pivotally carried by said support means, having one arm adapted to engage a lug of an ingot mold, and having another arm engaged by said auxiliary piston rod.
  • said releasable holding means includes a second bell crank having a lug-engaging arm for engaging a second lug of an ingot mold and having a second arm, a second auxiliary cylinder and auxiliary piston slidable therein with a second auxiliary piston rod engaging said second arm of said second bell crank, and a second auxiliary conduit communicating with said auxiliary cylinder and with said distributing valve means to be controlled simultaneously with and in the same way as said first mentioned auxiliary conduit to provide actuation of said second bell crank in unison with said first mentioned bell crank.
  • auxiliary cylinder has a space therein beneath said auxiliary piston communicating with said auxiliary conduit for raising said auxiliary piston rod when said auxiliary conduit communicates through said distributing valve means with said upper conduit, said releasable holding means having the construction of a lazy tongs the free ends of which are adapted to grip an end of an ingot, and said auxiliary piston rod coacting with said lazy tongs for displacing the latter to a release pOSitiOn during movement of said auxiliary piston in said auxiliary cylinder in an upward direction while said auxiliary conduit receives fluid from said upper conduit, and a second auxiliary conduit communicating with the space in said auxiliary cylinder over said auxiliary piston therein and also communicating with said distributing valve means to receive fluid from said upper conduit when said distributing valve means is in said other position connecting said first mentioned auxiliary conduit with said return flow conduit, whereby when said distributing valve means is in said other position thereof fluid under pressure will be received from said upper conduit and delivered to the space over said auxiliary piston to displace
  • said actuating means includes a rotary ratchet fixed to said distributing valve means for displacing the latter between said positions in response to turning of said ratchet, and a pawl actuating said ratchet and connected to said main piston rod for movement therewith.
  • said actuating means includes an elongated bar carrying said pawl at one end thereof and carried at its other end by said main piston rod, and said support means guiding said bar for longitudinal movement to direct said pawl along a path where it Will engage said ratchet wheel.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Casting Devices For Molds (AREA)
  • Load-Engaging Elements For Cranes (AREA)
  • Actuator (AREA)
US602901A 1965-12-22 1966-12-19 Apparatus to be used with ingots Expired - Lifetime US3401739A (en)

Applications Claiming Priority (1)

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CS768765 1965-12-22

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US (1) US3401739A (de)
AT (1) AT267094B (de)
CH (1) CH456862A (de)
DE (1) DE1290308B (de)
FR (1) FR1503425A (de)
GB (1) GB1166093A (de)

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US3950020A (en) * 1973-03-29 1976-04-13 Fried. Krupp Gesellschaft Mit Beschrankter Haftung Gripping device
US4012938A (en) * 1974-06-07 1977-03-22 Ab Bofors Device for inserting or removing a hot blank in a drop hammer
US4416480A (en) * 1981-09-08 1983-11-22 Cranston Machinery Co., Inc. Pneumatic release for load hook
US6241298B1 (en) * 1997-02-18 2001-06-05 Easylift Limited Release mechanism
CN103112775A (zh) * 2013-02-22 2013-05-22 谭晓婧 电渣锭自动挂、脱钩装置
US20140208666A1 (en) * 2013-01-27 2014-07-31 Conxtech, Inc. Dual-function, sequential-task, lug-registry, pick and stack-align building-component handling system
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USD796774S1 (en) 2015-03-30 2017-09-05 Conxtech, Inc. Rail pallet
US9803380B2 (en) 2013-01-24 2017-10-31 Conxtech, Inc. Plural-story, pipe-support frame system with modular, removably attachable lateral-worker-support scaffolding
US11085194B2 (en) 2018-02-09 2021-08-10 Conxtech, Inc. Moment connection component lifting tool assembly
US11555317B2 (en) 2018-02-09 2023-01-17 Conxtech, Inc. Moment connection component clamping tool
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US9010126B2 (en) 2008-02-20 2015-04-21 United Technologies Corporation Gas turbine engine with variable area fan nozzle bladder system
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US3950020A (en) * 1973-03-29 1976-04-13 Fried. Krupp Gesellschaft Mit Beschrankter Haftung Gripping device
US4012938A (en) * 1974-06-07 1977-03-22 Ab Bofors Device for inserting or removing a hot blank in a drop hammer
US4416480A (en) * 1981-09-08 1983-11-22 Cranston Machinery Co., Inc. Pneumatic release for load hook
US6241298B1 (en) * 1997-02-18 2001-06-05 Easylift Limited Release mechanism
US9109874B2 (en) 2012-12-29 2015-08-18 Conxtech, Inc. Modular, six-axis-adjustable, concrete-pour form-structure system
US10066403B2 (en) 2012-12-29 2018-09-04 Conxtech, Inc. Modular, six-axis-adjustable, concrete-pour form-structure system
US9803380B2 (en) 2013-01-24 2017-10-31 Conxtech, Inc. Plural-story, pipe-support frame system with modular, removably attachable lateral-worker-support scaffolding
CN105102735B (zh) * 2013-01-27 2017-06-23 康克斯科技公司 双功能、顺序任务、凸耳配准、拾取和堆叠对准建筑部件处理系统
WO2014116993A1 (en) * 2013-01-27 2014-07-31 Conxtech, Inc. Dual-function, sequential-task, lug-registry, pick and stack-align building-component handling system
CN105102735A (zh) * 2013-01-27 2015-11-25 康克斯科技公司 双功能、顺序任务、凸耳配准、拾取和堆叠对准建筑部件处理系统
US9103132B2 (en) * 2013-01-27 2015-08-11 Conxtech, Inc. Dual-function, sequential-task, lug-registry, pick and stack-align building-component handling system
US20140208666A1 (en) * 2013-01-27 2014-07-31 Conxtech, Inc. Dual-function, sequential-task, lug-registry, pick and stack-align building-component handling system
CN103112775A (zh) * 2013-02-22 2013-05-22 谭晓婧 电渣锭自动挂、脱钩装置
US9416807B2 (en) 2013-03-13 2016-08-16 Conxtech, Inc. Modular, faceted, block-and-shell node system for connecting elongate frame elements
US9493326B2 (en) 2014-01-13 2016-11-15 Conxtech, Inc. Clasp-and-lug system
USD768466S1 (en) 2015-03-30 2016-10-11 Conxtech, Inc. Rail pocket
USD796774S1 (en) 2015-03-30 2017-09-05 Conxtech, Inc. Rail pallet
USD777947S1 (en) 2015-03-30 2017-01-31 Conxtech, Inc. Modular ladder
USD768420S1 (en) 2015-03-30 2016-10-11 Conxtech, Inc. Toe kick
US11085194B2 (en) 2018-02-09 2021-08-10 Conxtech, Inc. Moment connection component lifting tool assembly
US11555317B2 (en) 2018-02-09 2023-01-17 Conxtech, Inc. Moment connection component clamping tool
US11761560B2 (en) 2020-02-19 2023-09-19 Conxtech, Inc. Modular pipe rack system
US12331862B2 (en) 2020-02-19 2025-06-17 Conxtech, Inc. Modular pipe rack system

Also Published As

Publication number Publication date
DE1290308B (de) 1969-03-06
GB1166093A (en) 1969-10-01
CH456862A (de) 1968-05-31
AT267094B (de) 1968-12-10
FR1503425A (fr) 1967-11-24

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