US3785691A - Automatic lifting device - Google Patents

Automatic lifting device Download PDF

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Publication number
US3785691A
US3785691A US00278568A US3785691DA US3785691A US 3785691 A US3785691 A US 3785691A US 00278568 A US00278568 A US 00278568A US 3785691D A US3785691D A US 3785691DA US 3785691 A US3785691 A US 3785691A
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US
United States
Prior art keywords
piston
chamber
cam
assembly
cylinder
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
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US00278568A
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English (en)
Inventor
G Sperry
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.)
FKI Industries Inc
Original Assignee
American Chain and Cable Co Inc
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Filing date
Publication date
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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
    • B66C1/02—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 suction means
    • B66C1/0256—Operating and control devices
    • B66C1/0275—Operating and control devices actuated by lifting action
    • 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
    • B66C1/02—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 suction means
    • B66C1/0212—Circular shape
    • 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
    • B66C1/02—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 suction means
    • B66C1/0256—Operating and control devices
    • B66C1/0262—Operating and control devices for rotation
    • 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
    • B66C1/02—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 suction means
    • B66C1/0293—Single lifting units; Only one suction cup

Definitions

  • the present invention is directed to improvements thereover and, in brief, provides a simplified vacuum actuated lifting deivce for attachment to a hoist or crane utilizing a piston and cylinder arrangement in which the capacity of the vacuum generating chamber responds generally in direct proportion to the weight of the load being lifted so that as load increases, vacuum increases.
  • Limitation on lifting capacity is present by the design area of the vacuum gripping element which cooperates with the vacuum generating chamber.
  • valve means are embodied for effecting automatic application and release of vacuum forces without the need for manual interference; the operation of the valve means being effected in accordance with relative movement between the lifting cylinder and piston occasioned by the engagement of the lifting device with the object or load to be lifted.
  • Another object of this invention is to provide an improved lifting device, as aforesaid, employing automatically operable valve means for controlling the evacuation and venting of a vacuum chamber therefor.
  • Another important object of this invention is to provide an improved vacuum actuated lifting device which is dependable in operation and exhibits economies of manufacture and maintenance.
  • FIG. 1 is a top plan view of a lifting device according to this invention
  • FIG. 2 is a front elevational view thereof
  • FIG. 3 is an enlarged cross-sectional view with parts in full elevation taken substantially along vantage line 3-3 of FIG. 1 and looking in the direction of the arrows thereon;
  • FIG. 4 is a partial enlarged elevational view with portions thereof in section of the valve means and associated elements positioned for lifting operation;
  • FIG. 5 is a partial enlarged developed view of the cam means employed in the assembly illustrated in FIG. 4 taken substantially from vantage line 55 of FIG. 4 and looking in the direction of the arrows thereon;
  • FIG. 6 is another view similar to view 4 illustrating the positioning of the valve means and associated elements conditioned for disengaging the device from the load;
  • FIG. 7 is a view similar to FIG. 5 showing the operating relationship of the cam means as viewed from vantage line 7--7 of FIG. 6 and looking in the direction of the arrows thereon;
  • FIG. 8 is another view similar to FIG. 4 showing the relationship of the valve means and associated elements, in condition for actively releasing the device of this invention from the load;
  • FIG. 9 is the schematic view similar to FIGS. 5 and 7 taken substantially along vantage line 9-9 of FIG. 8 and looking in the direction of the arrows thereon to illustrate the relationship of the cam means in the operating condition therefor as illustrated in FIG. 8.
  • a lifting device indicated generally by numeral 20 comprises a lifting cylinder assembly 21 having a hoist ring 22 for attachment to hook means 23 of an overhead crane or hoist.
  • a piston assembly 24 (see FIG.3) is mounted internally of the cylinder assembly and is attached to a gripper assembly 25 located coaxially beneath the cylinder assembly, by an intervening piston rod and plunger assembly 26.
  • the latter assembly contains a cam actuated valve assembly 27, for selectively sealing off and venting the upper interior of the cylinder comprising a vacuum chamber which is coupled to the gripper assembly by an interconnecting conduit means 28.
  • the cylinder assembly 21 is made up of a main cylinder body 30, preferably of cast metal to formulate cylindrical sidewalls 31 having air cooling ribs 32 on its exterior circumference and defining with the top wall 33 thereof, an internal cylindrical chamber 34 which is closed over at its bottom side by a bottom plate 35 fixed to the bottom edge of the sidewall 31 as by cap screws 36 so as to seal internal chamber 34.
  • top wall 33 of the cylinder body 30 is provided with four upwardly extending rib portions 37 disposed diagonally thereof along four quadrants to merge with a central cylindrical hub portion 38 having a central bore opening 39 (see FIG. 3).
  • a diametrically extending recessed portion 40 is formed at the outer end of hub portion 38 directly beneath attachment block 41 affixed to the hub portion 38 as by a welding, cap screws, or similar fasteners.
  • the hoist ring 22 is fastened to the block 41; the same comprising a continuous annular ring member for engagement by the hoist hook 23, as previously mentioned.
  • a countersunk valve seat 42 respective of a vent valve 43 which has an enlarged end and seal at its upper end.
  • Valve 43 floats freely in bore 39 with the seal thereof engaging the seat 42.
  • a vacuum gauge 45 is mounted on the upper side of top wall 33 for the cylinder, beneath a U-shaped guard bracket 46, the gauge communicating directly with the upper interior of chamber 34 in operation.
  • the piston assembly 24 is mounted within the upper interior of the cylinder assembly and, more specifically, is located at the upper end of chamber 34 therein being affixed to the upper end of the piston rod and plunger assembly 26.
  • the piston assembly comprises a generally cylindrical metal piston plate having a diametrical dimension slightly less than the interior diameter of chamber 34 and carrying at its periphery a molded piston seal ring of annular configuration designated 51.
  • the seal is fixed in an annular groove 52 formed inwardly of the outer periphery of the piston member 50 to present a depending elastic lip portion 53 thereof to the interior sidewall of chamber 34 with flexible sealed engagement.
  • a vent passageway opening 54 comprising a cylindrical bore, is formed centrally of the piston plate 50 in registering alignment with the central bore 39 through the head end of the cylinder body.
  • the piston plate 50 is fixed concentrically over the upper end of a tubular piston rod 55 comprising one element of the piston and plunger assembly 26; the piston rod 55 extending coaxially through chamber 34 and a cylinder opening 56 formed coaxially of a central hub portion 57 of the bottom plate 35.
  • the outer walls of the piston rod 55 are closely fitted within and guided by a sleeve bushing 58 pressed into opening 56.
  • piston and plunger assembly 26 comprises the tubular piston rod 55 and a coaxially mounted cylindrical plunger rod or shaft 60 slightly movable within and relative to the lower end of the piston rod 55 between limits.
  • a pair of diametrically opposed slotted openings 61-61 are formed through the tubular sidewalls of the piston rod for engaging the ends of a cylindrical pin connector 62, which extends through the plunger rod 60 so that its opposite ends project outwardly into the opposed slotted openings 61-61 thereby to slidingly interconnect the cylindrical piston rod 55 and the plunger 60.
  • the gripper assembly 25 is mounted coaxially beneath the cylinder assembly and, more specifically, is fastened to the lower end of the plunger member 60 as best shown in FIGS. 2 and 3.
  • the gripper assembly comprises a cast metal lift plate 65 having a generally circular body portion 66 formed with a chamfered periphery 67 and a centrally located upwardly extending cylindrical boss portion 68.
  • Portion 68 is distinguished by a central bore 69 receptive of a ball ended connector stud 70 and a threading ball retainer sleeve 71 therefor whereby to provide a ball and socket or universal swivel connection between the plunger 60 and the lift plate.
  • the stud connector 70 has a threaded shank 72 which receives a lock nut 73 and a lock washer 74, beneath a four armed generally U-shaped indicator bracket 75.
  • Four upwardly extending arm portions 76 of the bracket pass outwardly along the exterior walls of cylinder body 30, passing through cutaway opening 77 (see FIG. 1) in the air-cooling ribs 32.
  • the threaded shank 72 of the stud .and plunger assembly, the outer ends of the arm 76 thereof provide a visual indicator of the approximate location of the piston in chamber 34 thereby indicating the degree of operating vacuum to the user.
  • a resilient elastomeric seal ring 80 having an angularly depending seal lip portion 81 of tapered cross-sectional configuration for engaging the upper surface 82 of a planar work piece or object 83 to be lifted.
  • an annular planar mounting flange portion 84 Extending radially inwardly of the upper end of the seal rings lip portion 81 is an annular planar mounting flange portion 84 adapted to overlie the upper marginal surface 85 of the lift plate.
  • An annular clamping ring 86 is mounted over the flange portion 84 and is held tightly thereagainst by a plurality of cap screw connectors 87 thereby securely fastening the seal ring 80 to the lift plate.
  • the angularly extending lip portion 81 of the seal ring forms with the lift plate and the upper surface 82 of the work piece a generally truncated conical sub-chamber 90 forming a secondary vacuum chamber which communicates directly with the upper portion of the cylinder chamber 34 via the conduit means 28.
  • a generally truncated conical sub-chamber 90 forming a secondary vacuum chamber which communicates directly with the upper portion of the cylinder chamber 34 via the conduit means 28.
  • connection of the upper interior of the cylinder chamber 34 is effected via an elbow member 92 threaded through an opening in the sidewalls 31 of the cylinder.
  • Elbow 92 is joined to an air filter member 93 and a long rigid nipple or pipe 94 leading to a second elbow 95 located at the lower end of nipple 94.
  • Elbow 95 in turn is coupled to flexible hose 96 by a clamp connector means 97.
  • the lower end of the hose 96 in turn is connected to a third elbow fitting 98 mounted in an opening extending through the left plate 65 to communicate with the chamber 90 therebeneath.
  • any atmosphere within the upper end of the cylinder chamber 34 is communicated directly to the chamber spacing 90 beneath the lift plate 65.
  • a suitable vent and air filter 99 is mounted in the lower bottom plate 35 of the cylinder assembly as at threaded opening 100 (see F IG. 3) whereby to vent the lower portion of chamber 34 beneath the piston assembly to atmosphere.
  • piston rod and plunger assembly 26 comprising the interconnected cylindrical piston rod 55 and plunger rod 60 previously described, it will be understood from FIG. 3, in particular, that the upper interior of the piston rod houses the valve assembly 27 which will now be described.
  • a lower cylindrical cam member 104 mounted over the upper end of the plunger rod 60 and more specifically pinned to an extending core portion 102 thereof by connector pin 103, is a lower cylindrical cam member 104 which is adapted to reciprocate with the latter within and relative to the piston'rod 55.
  • Cam 104 is prevented from rotating relative to piston rod 55 by virtue of the connector pin 62 which rides in the slotted opening 61-61 as previously described.
  • the upper end of the cam 104 is formed with a plurality of camming teeth 105 of like formation which extend around the upper end thereof, each of which is distinguished by elongated cam face 106 and a shorter cam face 107 (see FIGS. 59).
  • the lower cam 104 is further provided with at least one elongated slotted opening 108 milled in its outer cylindrical wall for reception of an index pin 109 projecting through the sidewall of the tubular piston rod 55 at opening 110 (see FIGS. 4, 6 and 8).
  • upper cam 114 Disposed coaxially over lower cam 104 is a similar upper cam 114.
  • upper cam 114 is provided with a plurality of camming teeth 115 on its lower end, such teeth 115 being identical in formation to teeth 105 in the lower cam and therefore each comprising an elongated cam face or surface 116 intersecting a shorter cam face 117.
  • adjacent teeth of the upper cam in FIGS. 5, 7 and 9 are designated 115, 1150, 115b and 1156.
  • the upper cam is distinguished by a plurality of elongated openings 118 (corresponding to openings 108 in the lower cam) and a plurality of shorter slotted openings 119; the openings 118 and 119 being formed at the base apex of alternately adjacent cam teeth for alternate sequential engagement with the index pin 109.
  • valve means 120 Rotatably and slidingly mounted on the upper cam 114 and extending coaxially upwardly therefrom is a valve means 120 having a cylindrical stem body 121 (see FIGS. 4, 6 and 8).
  • the valve stem passes through a cylindrical bore 122 formed coaxially through the body of the upper cam member to communicate with an enlarged counterbore 123 opening inwardly of the lower end thereof.
  • An annular spacer ring 124 is mounted over the valve stem body 121 beneath the bottom wall ofthe counterbore 123 and a snap retainer ring 125 engages a groove cut in the valve stem 121 to maintain the spacer in position.
  • the valve stem is coupled with the upper cam member.
  • valve stem 121 The upper or outer end of the valve stem 121 is distinguished by an enlarged cylindrical valve head portion 126 having a resilient seal 127 over its upper face.
  • valve seal 127 effectively seals off the vent opening 54 formed coaxially through the piston body inasmuch as the diameter of the valve head and seal is greater than the diameter of the opening 54. Blocking opening 54, of course, prevents passage of air therethrough as is illustrated in FIG. 3, for example.
  • a spring 128 closely surrounds the valve stem 121 between the lower face of its head 126 and the upper end of cam 114 to normally bias the valve head and stem portion away from the upper cam member.
  • a larger upper cam spring 130 coaxially surrounds the valve stem and valve spring to extend between the lower face of the piston body 50 and the upper end of the upper cam member 114, being coaxially guided on the latter by reason of an annular guide recess 131 formed in the upper periphery of the cam member 1 14.
  • the lower end of spring 130 rides on a washer 132 to assist rotation of cam 114 reative thereto.
  • Spring 130 acts to normally bias the upper cam member downwardly away from the piston body and maintain the same tightly against the index pin in operation as the upper cam member is periodically rotatably indexed with counterclockwise movement (as viewed from above) as will appear in greater particular hereinafter.
  • tubular piston member 55 is importantly provided with several ports or vent openings 135 spaced about its upper end immediately adjacent to the valve head 127. Additionally secondary vent openings 136 also are provided immediately of the ends of the piston rod to assist in the flow of air past the valve head in operation.
  • the device 20 is in a position to effect lifting of the work piece 83 with the valve means 120 positioned with its head seal 127 tightly over the vent openings 54. This prevents the inflow of air into the portions of cylinder chamber 34 above the piston assembly 24.
  • the plunger member 60 in this position of operation, has previously drifted downwardly to its lower limit of movement relative to the piston rod 55 as dictated by the engagement of pin 62 with the bottom ends of the slotted openings 61.
  • FIGS. 4 and 5 This condition of operation is illustrated best in FIGS. 4 and 5 with the latter showing the relationship of the two cam members associated with the valve assembly 27. It is to be noted in particular from FIG. 5, that the index pin 109 is shown engaged with one of the shorter slotted openings 119 intermediate two adjacent teeth a and 115b of the upper cam in this operating condition.
  • the cam spring is in a semi-compressed state and the valve spring 128 is compressed, tightly holding the valve seal 127 over the vent opening 54 during this first operational condition for lifting the work piece.
  • piston rod 55 Upon raising the load, piston rod 55 will move downwardly to draw a vacuum in the upper side of chamber 34.
  • FIG. 6 a second operational condition is illustrated as occurs after the load has been lifted and moved to a designated resting position. Lowering action by the hoist effectively relieves the weight of the load or work piece from the lifting device 20. As this takes place, plunger rod 60, as illustrated in FIG. 6, moves upwardly within the cylindrical piston rod 55, forcing the lower cam 104 into engagement with upper cam 114 and fully compressing both the cam spring 130 and the valve spring 128. With such upward movement of the cams, particularly the upper cam 114, the index pin 109 is disengaged from the shorter slotted opening 119 (see FIGS. 4 and 5). Disengagement of the indexing pin and the inter-engagement of the cam teeth of the two cams, as shown in FIG.
  • the upper cam moves downward rapidly and in so doing disengages the valve means, more particularly the head and seal 126 and 127 thereof from the vent opening 54.
  • This permits pressurized or atmospheric air within the lower portions of cylinder chamber 34 to flow through the vent openings 135 and 136, past the cam spring 130 and outwardly through the vent opening 54 to the upper side of the piston plate 50, or in other words, into the evacuated portion of chamber 34 above the piston, pressurizing the formerly evacuated portion of chamber 34. Pressurized air also flows upwardly through the central vent bore 39 in the top 0k head end of the cylinder, lifting the vent valve 43 from its seat 42 (see FIG. 3).
  • the subatmospheric chamber 90 beneath the gripper assembly 23 is also pressurized, thus releasing the vacuum grip with the surface of the work piece. Disengagement of the lifting device from the latter occurs upon continued upward movement of the device 20.
  • a vacuum actuated lifting attachment for coupling a hoist to flat surfaced objects comprising: a lifting cylinder attachable to the hoist for actuating movements thereby and enclosing an internal chamber, a piston assembly movable within said chamber, a gripper assembly exteriorly beneath said cylinder including resilient seal means for gripping and forming a sealed subchamber with a planar surface, a tubular piston rod and plunger rod assembly, interconnecting said piston and gripper assemblies, the piston rod being connected to said piston assembly and the plunger rod being connected to said piston rod and gripper assembly for reciprocating movement with and relative to said piston assembly, a pair of valve means, one on said cylinder and one associated with said piston assembly for controllably sealing and venting said chamber above said piston assembly, conduit means communicating between said sub-chamber and said chamber above said piston, and a pair of cam elements mounted within said piston rod, one being reciprocally movable with said plunger rod relative thereto and the other being rotatably driven by said one element to operatively control said valve means associated with
  • said spring means being controlled by axial positioning of said cam elements within said piston rod.
  • a vacuum actuated lifting device for automatically coupling and detaching flat surfaced objects to an overhead hoist comprising: a cylinder having top and bottom walls enclosing an internal chamber and including means for attaching the same to a hoist for vertical raising and lowering movements therewith, said top and bottom walls being provided with central passageways therethrough; first vent valve means mounted in the top wall passageway and operable to close and open responsively with the evacuation and pressurization of said chamber, piston means movably mounted in said chamber, including seal means engaging the internal side walls of the cylinder, said piston means having a vent opening communicating between the upper and lower sides thereof and said chamber being openly vented to atmosphere beneath said piston means; a tubular piston rod having its upper end fixed to said piston means so that its hollow interior communicates with said vent opening and said chamber above said piston means while the lower end thereof communicates with atmosphere beneath said piston means and slidably passes through the passageway in the bottom wall of said cylinder; a plunger rod, slidingly mounted within said piston rod for limited coaxial reciprocating movement relative thereto

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manipulator (AREA)
  • Load-Engaging Elements For Cranes (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
  • Hooks, Suction Cups, And Attachment By Adhesive Means (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
US00278568A 1972-08-07 1972-08-07 Automatic lifting device Expired - Lifetime US3785691A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US27856872A 1972-08-07 1972-08-07

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US3785691A true US3785691A (en) 1974-01-15

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US00278568A Expired - Lifetime US3785691A (en) 1972-08-07 1972-08-07 Automatic lifting device

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JP (1) JPS504751A (cs)
DE (1) DE2337667C3 (cs)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD271586S (en) 1981-04-30 1983-11-29 Myotoku Ltd. Combined vacuum pump and control valve therefor
USD271587S (en) 1981-04-30 1983-11-29 Myotoku Ltd. Combined vacuum pump and control valve therefor
US4635988A (en) * 1982-03-24 1987-01-13 Michel Potters Procedure and device for gripping parcels
US4925225A (en) * 1989-06-19 1990-05-15 Dost Incorporated Vacuum lifting device for handling sheet material
US5284416A (en) * 1990-09-26 1994-02-08 Adolf Schmidt Vacuum lifter
US5664617A (en) * 1995-03-24 1997-09-09 Columbia Aluminum Corporation Sow lifter
GB2320010A (en) * 1996-12-03 1998-06-10 Smc Kk Suction gripper
US6039530A (en) * 1998-04-21 2000-03-21 J. Schmalz Gmbh Vacuum manipulation device
US20060119117A1 (en) * 2003-09-02 2006-06-08 Commissariat A L'energie Atomique Barrel handling device
US7543868B1 (en) 2005-04-13 2009-06-09 The Caldwell Group, Inc. Mechanically actuated vacuum lifting device
US20100052343A1 (en) * 2007-01-26 2010-03-04 Richard Lester Hallett Fitting, crane hook, and crane hook assembly
US20110036673A1 (en) * 2009-08-12 2011-02-17 Hiroshi Kasuga Load weighting control apparatus
US20170113904A1 (en) * 2015-10-22 2017-04-27 Vacuworx Global, LLC Truck-Mounted Vacuum Material Handler and Quick Disconnect
US11359664B2 (en) * 2020-01-06 2022-06-14 Lih Yann Industrial Co., Ltd. Suction cup
US11892119B1 (en) * 2023-02-13 2024-02-06 Tilta Inc. Suction-operated device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1294103A (en) * 1917-07-19 1919-02-11 Pittsburgh Plate Glass Co Vacuum lifting device.
US3347327A (en) * 1963-05-21 1967-10-17 Hasenclever Ag Maschf Pneumatic lifting device and weighing means for flat goods
US3431010A (en) * 1966-11-04 1969-03-04 Vacu Lift Maschbau Vacuum lifting device,preferably for flat objects

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1294103A (en) * 1917-07-19 1919-02-11 Pittsburgh Plate Glass Co Vacuum lifting device.
US3347327A (en) * 1963-05-21 1967-10-17 Hasenclever Ag Maschf Pneumatic lifting device and weighing means for flat goods
US3431010A (en) * 1966-11-04 1969-03-04 Vacu Lift Maschbau Vacuum lifting device,preferably for flat objects

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD271586S (en) 1981-04-30 1983-11-29 Myotoku Ltd. Combined vacuum pump and control valve therefor
USD271587S (en) 1981-04-30 1983-11-29 Myotoku Ltd. Combined vacuum pump and control valve therefor
US4635988A (en) * 1982-03-24 1987-01-13 Michel Potters Procedure and device for gripping parcels
US4925225A (en) * 1989-06-19 1990-05-15 Dost Incorporated Vacuum lifting device for handling sheet material
US5284416A (en) * 1990-09-26 1994-02-08 Adolf Schmidt Vacuum lifter
US5664617A (en) * 1995-03-24 1997-09-09 Columbia Aluminum Corporation Sow lifter
GB2320010A (en) * 1996-12-03 1998-06-10 Smc Kk Suction gripper
GB2320010B (en) * 1996-12-03 1999-01-13 Smc Kk Workpiece holding device
US5879040A (en) * 1996-12-03 1999-03-09 Smc Kabushiki Kaisha Workpiece attracting device
US6039530A (en) * 1998-04-21 2000-03-21 J. Schmalz Gmbh Vacuum manipulation device
US20060119117A1 (en) * 2003-09-02 2006-06-08 Commissariat A L'energie Atomique Barrel handling device
US7264288B2 (en) * 2003-09-02 2007-09-04 Commissariat A L'energie Atomique Barrel handling device
US7543868B1 (en) 2005-04-13 2009-06-09 The Caldwell Group, Inc. Mechanically actuated vacuum lifting device
US20100052343A1 (en) * 2007-01-26 2010-03-04 Richard Lester Hallett Fitting, crane hook, and crane hook assembly
US8313131B2 (en) * 2007-01-26 2012-11-20 Airbus Operations Limited Fitting, crane hook, and crane hook assembly
US8662549B2 (en) 2007-01-26 2014-03-04 Airbus Operations Limited Fitting, crane hook, and crane hook assembly
US20110036673A1 (en) * 2009-08-12 2011-02-17 Hiroshi Kasuga Load weighting control apparatus
US7938467B2 (en) * 2009-08-12 2011-05-10 Hiroshi Kasuga Load weighting control apparatus
US20170113904A1 (en) * 2015-10-22 2017-04-27 Vacuworx Global, LLC Truck-Mounted Vacuum Material Handler and Quick Disconnect
US11359664B2 (en) * 2020-01-06 2022-06-14 Lih Yann Industrial Co., Ltd. Suction cup
US11892119B1 (en) * 2023-02-13 2024-02-06 Tilta Inc. Suction-operated device

Also Published As

Publication number Publication date
DE2337667C3 (de) 1980-06-12
JPS504751A (cs) 1975-01-18
DE2337667A1 (de) 1974-02-28
DE2337667B2 (de) 1979-09-27

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