US1971952A - Device for handling stacks of cases by trucks - Google Patents

Device for handling stacks of cases by trucks Download PDF

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US1971952A
US1971952A US524503A US52450331A US1971952A US 1971952 A US1971952 A US 1971952A US 524503 A US524503 A US 524503A US 52450331 A US52450331 A US 52450331A US 1971952 A US1971952 A US 1971952A
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cases
truck
fingers
stack
hand
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US524503A
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Harry A Towneend
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B1/00—Hand carts having only one axis carrying one or more transport wheels; Equipment therefor
    • B62B1/10—Hand carts having only one axis carrying one or more transport wheels; Equipment therefor in which the load is intended to be transferred totally to the wheels
    • B62B1/14—Hand carts having only one axis carrying one or more transport wheels; Equipment therefor in which the load is intended to be transferred totally to the wheels involving means for grappling or securing in place objects to be carried; Loading or unloading equipment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B1/00—Hand carts having only one axis carrying one or more transport wheels; Equipment therefor
    • B62B1/10—Hand carts having only one axis carrying one or more transport wheels; Equipment therefor in which the load is intended to be transferred totally to the wheels
    • B62B1/14—Hand carts having only one axis carrying one or more transport wheels; Equipment therefor in which the load is intended to be transferred totally to the wheels involving means for grappling or securing in place objects to be carried; Loading or unloading equipment
    • B62B1/142—Hand carts having only one axis carrying one or more transport wheels; Equipment therefor in which the load is intended to be transferred totally to the wheels involving means for grappling or securing in place objects to be carried; Loading or unloading equipment with object clamping means being movable substantially parallel to the ground surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B2202/00—Indexing codes relating to type or characteristics of transported articles
    • B62B2202/12—Boxes, Crates

Definitions

  • My invention relates to a device for handling stacks of cases by trucks, and has for its object to provide simple and eflicient means whereby a truck such as a hand-truck can be presented to the perpendicular face of a stack of cases,
  • the entire stack may be readily lifted and handled as a unit.
  • a further object of my invention is-to provide means for clamping the top of the stack of cases which will operate in conjunction with the aforesaid fingers so that when the fingers are inserted in the hand-holds of the bottom case'and the stops are clamped thereto, the top clamping member will simultaneously be seated upon the top case, and in this manner the stack of cases be firmly held together to be swung over on the truck.
  • Fig. 1 is a side view of a truck having my invention applied thereto as the same is presented to a stack of cases.
  • Fig. 2 illustrates what is shown in Fig. 1 after the truck has been swung over. so as to transport the stack of cases.
  • FIG. 3 is a section detail on line 3-3 of Fig. 1. Fig...
  • Fig. ' 4 is a sectional plan view on line 4-4 ofFigIl.
  • Fig. 5 is a sectional plan view on line 5-5 of Fig. 4.
  • Fig. 6 is an elevation view similar to Fig. 1 showing extensible members for adapting the device to clamp tall stacks of cases.
  • Fig. '7 is a sectional elevation view of a portion of what is shown in Fig. '6.
  • Fig. 8 is a sectional plan view on line 8-8 of Fig. 7.
  • Fig. 9 is a sectional fragmentary view on line 9-9 of Fig. 8.
  • a hand-truck 10 embodying handles 11 and supporting wheels 12 is; or may be, of usual construction except that in addition to the side bars 13, 14 of said truck there will be a center bar '15, preferably of wider face than 00 the side bars 13, 14, against which the side walls of the stack of cases 16 will engage when said cases are thrown over upon the truck, as shown in Fig.2.
  • a boxing 18 which extends 5 transversely across the truck and provides ways or guides for bars or rods 19, 20 which are adapted to slide laterally toward and from one ankeepers 30 and 31 which take in the oppositelytumed spiral grooves 32 and 33 of a rotary rod 34 mounted to rotate in bearings 35 and 36' formed on trunnion-like end extensions of said rod.
  • the rod is provided at its center with a pinion 37 which is engaged by a rack '38 on a bar 39 slidable through a way formed in a plate 40, as clearly shown in Figs. 1, 2 and 3, said bar being provided with a hand member 41 by which it may be operated in either direction.
  • the rack bar 38 is mounted to slide in a way formed by angle members 42 and 43, as'clearly shown in Figs. 4 and 5.
  • a second bar 44 which is provided with a rack 45. engaging the opposite side of the spur gear 3'7 from that engaged by the rack 38 of the bar 39.
  • This bar 44 carries adjacent its top a piece 46 adapted to overhang the top case of the stack, both of the bars 38 and 44 passing through guide openings in the bracket member 40.
  • Figs. 6 to 9 inclusive differs from that in Figs. 1 to 5 in that the longitudinal .rest member 15'ofthe second-named set of figures has applied thereto.
  • a piece of channel iron 47 13 adapted to telescope over the bar 15 and to be held in proper elevated position by means of countersunk bolts 48 extending through the channel and the longitudinal supporting member 15, the bracket 40 being carried by the member 47 and raised and lowered with it.
  • the supporting member may be increased in elevation the equivalent of three or more cases to adapt the truck to grip and seize tall stacks of cases, all as clearly shown in Figs. 6 and 8.
  • the bar 44 is correspondingly made extensible by a telescoping section 49 applied thereto which carries the overhangin grip piece 46. This section is held in adjusted position by means of a pair of bolts 50 which take in holes 51 in the bar 44.
  • the bar 44 takes the place of the bar 39,-so that there is but one bar, and the downward movement thereof causes the fingers 23, 24 to move inwardly into the hand-hold openings so as to seat the stops 26 and 27 against the end walls of the cases at the same time that the top piece 46 engages and clasps the edges of the top case of the stack.
  • This top piece is preferably provided with a rubber pad 51.
  • the operation of my device will be apparent from the foregoing description.
  • the truck is brought up to a stack of cases and the face of the truck presented in vertical position thereto, as in Fig. 1.
  • the handle 41 is depressed, in which position the bars 19, 20, arms 21, 22 and fingers 23, 24 are in the position shown in Fig. 4, such that they may pass outside of the end walls of the cases.
  • the handle 41 and bar 39 attached thereto is then drawn up from the full-line position of Fig. 1 to the dotted-line position of Fig. 1 and the full-line position of Fig. 2, which results in causing the fingers 23 to enter the hand-hold slots 25 and the contact pieces 26 and 2'1 to engage the end walls of the bottom case, as shown in dotted lines in Fig. 4.
  • the construction can be usedwithout the top piece 46, in which case, by placing a hand upon the top case of the stack, the entire stack may be thrown over upon the face of the truck, resting upon the frame bar 15,
  • the device is selflocking since the action of the keepers 30 and 31 upon the worm slots 32 and 33 is not such as to permit automatic or unintentioned movement thereof. At the same time release is effected with the utmost ease. There is nothing which enters in upon the body of the case, no hooks or other devices which might damage the walls of the case.
  • the invention is applicable to'a hand truck of ordinary dimensions, but where the extensible contact frame piece and grip piece carrier are employed, the device is practicable to handle high stacks of cases, and the handling of stacks of any customary or practicable height is well within the scope of my invention and, of course, I do not wish to restrict myself to the precise details of the invention herein shown and de scribed.
  • a device for handling stacks of bottle cases having handhold slots embodying a hand truck adapted to have its face positioned against a face of said stack, fingers adapted to enter the slots of the bottom case, and means including a rack and pinion and oppositely-turned worm slots ro tated thereby for operating said fingers.
  • a device for handling stacks of bottle cases having handhold slots embodying a hand truck adapted to have its face positioned against a face of said stack, horizontally extending fingers positioned above the lower end of the truck so as to be adapted to enter the slots of the bottom case,
  • a device for handling stacks of bottle cases having handhold slots embody a hand truck adapted to have its face positioned against a face of said stack, fingers adapted to enter the slots of the bottom. case, said fingers being provided with rigid stops so that the length of the fingers beyond said stops is not greater than the depth of the slots, and means for operating the fingers to cause them to enter the slots and to bring the stops against the ends of the bottom case for holding said fingers clamped in the slots.
  • a device for handling stacks of bottle cases having handhold slots embodying a hand truck adapted to have its face positioned against a face of said stack, bars adapted to move horizontally, a rotary member having oppositely-turned spiral slots a pinion thereon, studs on the respective bars entering the respective slots, a bar adapted to be moved by hand at right angles to said pinion having a rack engaging the same, and fingers on said first-named bars adapted to enter the slots of the bottom case when said rack bar is operated.
  • a device for handling stacks of bottle cases having means engageable with the bottom case
  • a device for handling stacks of bottle cases having means engageable with the bottom case
  • top engaging means engageable with the top case, a slide for operating the top engaging means, means connected therewith iorr simultaneously operating said bottom engaging means, and extensible supports for said cases and said top engaging means adapted to beadjusted for, different heights of stacks.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Handcart (AREA)

Description

1934- v H. A. TOWNSEND 1,971,952
DEVICE FOR HANDLING STAGKS 0F CASES BY TRUCKS Filed Marc h 23, 1931 Z'Sheets-Sheet -1 H. A. TOWNSEND DEVICE FOR HANDLING STACKS 0F CASES BY TRUCKS Aug. 28, 1934.
Filed March 23. 1931 2- Sheets-Sheet 2 rrl Patented Aug. 28, 1934 UNITED srArEs IMLQSZ DEVICE FOR HANDLING STAGES OI CASES I BY TRUCKS Harry A. Towmend,
Application March 2:, 1931, Serial No. 524,503 8 Claims. (cl. 214-055) My invention relates to a device for handling stacks of cases by trucks, and has for its object to provide simple and eflicient means whereby a truck such as a hand-truck can be presented to the perpendicular face of a stack of cases,
such, for example, as contain bottles of soft drinks, and by means of members engaging the sides of the case and within the hand-holds oi -such cases, the entire stack may be readily lifted and handled as a unit.
It is a particular object of my invention to provide in connection with a hand-truck'arm devices with inwardly-projecting fingers adapted to be moved in and out laterally to embrace the longitudinal extent of a case of bottles such as a case including bottles of soft drinks, and to provide means for moving said arms laterally toward one another so that fingers thereon may enter the hand-openings of the cases, and members adjacent said fingers may engage the ends of said case whereby the bottom case will be clamped to the truck and the whole stack can be lifted and swung upon the face of the truck and be thus conveniently transported.
A further object of my invention is-to provide means for clamping the top of the stack of cases which will operate in conjunction with the aforesaid fingers so that when the fingers are inserted in the hand-holds of the bottom case'and the stops are clamped thereto, the top clamping member will simultaneously be seated upon the top case, and in this manner the stack of cases be firmly held together to be swung over on the truck.
The full objects and advantages of my invention will appear in connection with the detailed description thereoi, and its novel features are particularly pointed out in the claims.
In the drawings, illustrating an application of my invention in one form,-
Fig. 1 is a side view of a truck having my invention applied thereto as the same is presented to a stack of cases. Fig. 2 illustrates what is shown in Fig. 1 after the truck has been swung over. so as to transport the stack of cases. Fig.
3 is a section detail on line 3-3 of Fig. 1. Fig..
' 4 is a sectional plan view on line 4-4 ofFigIl. Fig. 5 is a sectional plan view on line 5-5 of Fig. 4. Fig. 6 is an elevation view similar to Fig. 1 showing extensible members for adapting the device to clamp tall stacks of cases. Fig. '7 is a sectional elevation view of a portion of what is shown in Fig. '6. Fig. 8 is a sectional plan view on line 8-8 of Fig. 7. Fig. 9 is a sectional fragmentary view on line 9-9 of Fig. 8.
As illustrated, .a hand-truck 10 embodying handles 11 and supporting wheels 12 is; or may be, of usual construction except that in addition to the side bars 13, 14 of said truck there will be a center bar '15, preferably of wider face than 00 the side bars 13, 14, against which the side walls of the stack of cases 16 will engage when said cases are thrown over upon the truck, as shown in Fig.2. Secured by bolts 17 to the sides of the frame piece 13, 14 is a boxing 18 which extends 5 transversely across the truck and provides ways or guides for bars or rods 19, 20 which are adapted to slide laterally toward and from one ankeepers 30 and 31 which take in the oppositelytumed spiral grooves 32 and 33 of a rotary rod 34 mounted to rotate in bearings 35 and 36' formed on trunnion-like end extensions of said rod. The rod is provided at its center with a pinion 37 which is engaged by a rack '38 on a bar 39 slidable through a way formed in a plate 40, as clearly shown in Figs. 1, 2 and 3, said bar being provided with a hand member 41 by which it may be operated in either direction. The rack bar 38 is mounted to slide in a way formed by angle members 42 and 43, as'clearly shown in Figs. 4 and 5. g
As shown in Figs. 1 to 5 inclusive, and adapted for the handling of comparatively low stackssay five or six cases-there is provided a second bar 44 which isprovided with a rack 45. engaging the opposite side of the spur gear 3'7 from that engaged by the rack 38 of the bar 39. This bar 44 carries adjacent its top a piece 46 adapted to overhang the top case of the stack, both of the bars 38 and 44 passing through guide openings in the bracket member 40. g 1
The form shown in Figs. 6 to 9 inclusive differs from that in Figs. 1 to 5 in that the longitudinal .rest member 15'ofthe second-named set of figures has applied thereto. a piece of channel iron 47 13 adapted to telescope over the bar 15 and to be held in proper elevated position by means of countersunk bolts 48 extending through the channel and the longitudinal supporting member 15, the bracket 40 being carried by the member 47 and raised and lowered with it. By this means the supporting member may be increased in elevation the equivalent of three or more cases to adapt the truck to grip and seize tall stacks of cases, all as clearly shown in Figs. 6 and 8. The bar 44 is correspondingly made extensible by a telescoping section 49 applied thereto which carries the overhangin grip piece 46. This section is held in adjusted position by means of a pair of bolts 50 which take in holes 51 in the bar 44.
In this construction the bar 44 takes the place of the bar 39,-so that there is but one bar, and the downward movement thereof causes the fingers 23, 24 to move inwardly into the hand-hold openings so as to seat the stops 26 and 27 against the end walls of the cases at the same time that the top piece 46 engages and clasps the edges of the top case of the stack. This top piece is preferably provided with a rubber pad 51.
The operation of my device will be apparent from the foregoing description. The truck is brought up to a stack of cases and the face of the truck presented in vertical position thereto, as in Fig. 1. The handle 41 is depressed, in which position the bars 19, 20, arms 21, 22 and fingers 23, 24 are in the position shown in Fig. 4, such that they may pass outside of the end walls of the cases. The handle 41 and bar 39 attached thereto is then drawn up from the full-line position of Fig. 1 to the dotted-line position of Fig. 1 and the full-line position of Fig. 2, which results in causing the fingers 23 to enter the hand-hold slots 25 and the contact pieces 26 and 2'1 to engage the end walls of the bottom case, as shown in dotted lines in Fig. 4. The construction can be usedwithout the top piece 46, in which case, by placing a hand upon the top case of the stack, the entire stack may be thrown over upon the face of the truck, resting upon the frame bar 15,
and beheld by a hand or arm. However, the construction shown, where the grip piece 46 is brought down upon the edges of the top case simultaneously with the setting of the fingers in the hand-hold openings, is more efficient and satisfactory. When that is used the stack of cases is literally locked to the truck, and this makes possible (with the extensions provided) the bandling of very tall stacks of cases, ten or a dozen high, in which event it maybe necessary for two men to operate the truck. Whenever the appliances have been operated in the manner just described, the truck and its contents can quickly be rolled to a place of deposit, such, for example, as within the body of a motor truck or railway car, or upon a desired platform, and the stack of cases there be deposited in position for loading or transportation. Unloading may be effected in the same way. cases may be handled with the utmost despatch and with little effort or loss of time.
The advantages of my invention will be apparent from the foregoing detailed description. The construction can be applied to hand trucks of common manufacture. It is not expensive and does not require any modification of the handtruck further than the supplying of the central longitudinal frame-bar 15 when that is not present. The operation of the device is simple and effective. When the fingers 23 and 24 positioned in the hand slots 25 of the cases and the contact pieces 26 and 2'? are clamped upon the ends thereof by simply pulling up on the handle 41, the bottom case is securely locked to the truck." At the same time, the grip piece 46 will cause its rubber pad to seat upon the upper edges of the stack In this manner the stacked of cases and hold them firmly together and firmly upon the face of the truck. The device is selflocking since the action of the keepers 30 and 31 upon the worm slots 32 and 33 is not such as to permit automatic or unintentioned movement thereof. At the same time release is effected with the utmost ease. There is nothing which enters in upon the body of the case, no hooks or other devices which might damage the walls of the case.
The invention is applicable to'a hand truck of ordinary dimensions, but where the extensible contact frame piece and grip piece carrier are employed, the device is practicable to handle high stacks of cases, and the handling of stacks of any customary or practicable height is well within the scope of my invention and, of course, I do not wish to restrict myself to the precise details of the invention herein shown and de scribed.
I claim:
1. A device for handling stacks of bottle cases having handhold slots, embodying a hand truck adapted to have its face positioned against a face of said stack, fingers adapted to enter the slots of the bottom case, and means including a rack and pinion and oppositely-turned worm slots ro tated thereby for operating said fingers.
2. A device for handling stacks of bottle cases having handhold slots, embodying a hand truck adapted to have its face positioned against a face of said stack, horizontally extending fingers positioned above the lower end of the truck so as to be adapted to enter the slots of the bottom case,
means for operating the fingers to cause them to enter the slots, and means associated with the fingers to limit the extent of penetration within the slots.
3. A device for handling stacks of bottle cases having handhold slots, embody a hand truck adapted to have its face positioned against a face of said stack, fingers adapted to enter the slots of the bottom. case, said fingers being provided with rigid stops so that the length of the fingers beyond said stops is not greater than the depth of the slots, and means for operating the fingers to cause them to enter the slots and to bring the stops against the ends of the bottom case for holding said fingers clamped in the slots.
4. A device for handling stacks of bottle cases having handhold slots, embodying a hand truck adapted to have its face positioned against a face of said stack, bars adapted to move horizontally, a rotary member having oppositely-turned spiral slots a pinion thereon, studs on the respective bars entering the respective slots, a bar adapted to be moved by hand at right angles to said pinion having a rack engaging the same, and fingers on said first-named bars adapted to enter the slots of the bottom case when said rack bar is operated.
5. A device for handling stacks of bottle cases having means engageable with the bottom case,
'1. A device for handling stacks of bottle cases having means engageable with the bottom case,
means engageable with the top case, a slide for operating the top engaging means, means connected therewith iorr simultaneously operating said bottom engaging means, and extensible supports for said cases and said top engaging means adapted to beadjusted for, different heights of stacks.
8. A device for handling stacks of bottle cases of customary form with hand-hold openings located at points near the tops of said cases and extending through the end walls thereof parallel ---with the bottoms of said cases, a hand truck embodying a supporting platform free from material-engaging or holding projections throughout its length adapted to be positioned with said platform in substantially. vertical engagement with one or more of said cases, horizontally ex-
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Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2514972A (en) * 1947-10-06 1950-07-11 Robert S Reed Hand truck
US2533352A (en) * 1947-10-25 1950-12-12 Kolstad Company Case carrying hand truck
US2536151A (en) * 1946-02-25 1951-01-02 Clark Equipment Co Material handling apparatus
US2561896A (en) * 1949-02-19 1951-07-24 Weiss Samuel Industrial truck attachment
US2566863A (en) * 1948-07-06 1951-09-04 Geuder Paeschke & Frey Co Load retaining means for industrial vehicles
US2578016A (en) * 1949-01-29 1951-12-11 Rike Siles Elmer Brick handling fork mechanism
US2578802A (en) * 1948-12-06 1951-12-18 Fred C Heidrick Material handling industrial truck
US2603367A (en) * 1952-07-15 Hand truck
US2611497A (en) * 1947-08-23 1952-09-23 Clark Equipment Co Material handling device
US2629507A (en) * 1946-07-29 1953-02-24 Olson Oscar Jelmer Car parking mechanism
US2678744A (en) * 1951-08-10 1954-05-18 Frode A Kruse Wheeled lifter for beehive frame sections
US2740542A (en) * 1954-07-29 1956-04-03 William Rauch Article handling trucks
US2778516A (en) * 1954-10-08 1957-01-22 Robert G Knight Easy lift produce truck
US3066813A (en) * 1960-03-30 1962-12-04 Nestaway Inc Lift truck for stacked racks
DE3225770A1 (en) * 1982-07-09 1984-01-12 Kleindienst GmbH, 8900 Augsburg DRIVING DEVICE FOR MOVING A LOAD CARRIAGE OVER STAIRS
US4492505A (en) * 1982-01-27 1985-01-08 Dunning Donald T Clamping device for use on hand truck
EP0184406A2 (en) * 1984-12-04 1986-06-11 Cascade Corporation Load clamp having motor-powered screw-type clamping actuator capable of accurate positioning and high clamping force
US5427493A (en) * 1993-12-03 1995-06-27 Lucy; Patrick Hand truck with horizontally spreadable arms
US5632592A (en) * 1995-02-23 1997-05-27 Magline, Inc. Extensor wing latch mechanism for a two-wheeled hand truck
US6530584B1 (en) 2001-09-28 2003-03-11 Patrick C. Lucy Hand truck with selectively moveable arms
GB2392417A (en) * 2002-08-27 2004-03-03 David William Radford Trolley
US20080149425A1 (en) * 2006-12-20 2008-06-26 Lucy Patrick C Tire lift
US20110274526A1 (en) * 2010-02-12 2011-11-10 Kusick Richard L Dock dolly
US10604168B2 (en) * 2017-07-24 2020-03-31 Escalera, Inc. Lifter for stacked trays
AU2020227044B2 (en) * 2019-11-05 2021-11-18 Simpro Handling Equipment Limited A Crate Transporter

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2603367A (en) * 1952-07-15 Hand truck
US2536151A (en) * 1946-02-25 1951-01-02 Clark Equipment Co Material handling apparatus
US2629507A (en) * 1946-07-29 1953-02-24 Olson Oscar Jelmer Car parking mechanism
US2611497A (en) * 1947-08-23 1952-09-23 Clark Equipment Co Material handling device
US2514972A (en) * 1947-10-06 1950-07-11 Robert S Reed Hand truck
US2533352A (en) * 1947-10-25 1950-12-12 Kolstad Company Case carrying hand truck
US2566863A (en) * 1948-07-06 1951-09-04 Geuder Paeschke & Frey Co Load retaining means for industrial vehicles
US2578802A (en) * 1948-12-06 1951-12-18 Fred C Heidrick Material handling industrial truck
US2578016A (en) * 1949-01-29 1951-12-11 Rike Siles Elmer Brick handling fork mechanism
US2561896A (en) * 1949-02-19 1951-07-24 Weiss Samuel Industrial truck attachment
US2678744A (en) * 1951-08-10 1954-05-18 Frode A Kruse Wheeled lifter for beehive frame sections
US2740542A (en) * 1954-07-29 1956-04-03 William Rauch Article handling trucks
US2778516A (en) * 1954-10-08 1957-01-22 Robert G Knight Easy lift produce truck
US3066813A (en) * 1960-03-30 1962-12-04 Nestaway Inc Lift truck for stacked racks
US4492505A (en) * 1982-01-27 1985-01-08 Dunning Donald T Clamping device for use on hand truck
DE3225770A1 (en) * 1982-07-09 1984-01-12 Kleindienst GmbH, 8900 Augsburg DRIVING DEVICE FOR MOVING A LOAD CARRIAGE OVER STAIRS
US4566706A (en) * 1982-07-09 1986-01-28 Kleindienst Gmbh Easy-adjust stair climber for wheelchair
EP0184406A2 (en) * 1984-12-04 1986-06-11 Cascade Corporation Load clamp having motor-powered screw-type clamping actuator capable of accurate positioning and high clamping force
EP0184406A3 (en) * 1984-12-04 1987-09-02 Cascade Corporation Load clamp having motor-powered screw-type clamping actuator capable of accurate positioning and high clamping force
US5427493A (en) * 1993-12-03 1995-06-27 Lucy; Patrick Hand truck with horizontally spreadable arms
US5632592A (en) * 1995-02-23 1997-05-27 Magline, Inc. Extensor wing latch mechanism for a two-wheeled hand truck
US6530584B1 (en) 2001-09-28 2003-03-11 Patrick C. Lucy Hand truck with selectively moveable arms
GB2392417A (en) * 2002-08-27 2004-03-03 David William Radford Trolley
GB2392417B (en) * 2002-08-27 2005-12-07 David William Radford Trolley
US20080149425A1 (en) * 2006-12-20 2008-06-26 Lucy Patrick C Tire lift
US20110274526A1 (en) * 2010-02-12 2011-11-10 Kusick Richard L Dock dolly
US10604168B2 (en) * 2017-07-24 2020-03-31 Escalera, Inc. Lifter for stacked trays
AU2020227044B2 (en) * 2019-11-05 2021-11-18 Simpro Handling Equipment Limited A Crate Transporter

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