Dual pallet fork attachment for a lift truck
AssigneeSwingshift Manufacturing, Inc.
InventorsDaniel F. Chase, Robert J. Kroupa, Emmett C. Frison
Life of this patent
Estimating the term…
Abstract
The attachment (20) provides inner forks (54, 56) and outer forks (58, 60) that are directly and independently driven for handling juxtaposed pallets. The fork assembly (26) is carried by guide members (44, 48, 62, 66) that are constructed so that when two juxtaposed pallet loads are carried, there is substantially no downward deflection of the laterally outermost portions of the loads. A hydraulic control system is included for controlling the four operation functions performed by the attachment (20). The hydraulic control circuit is designed so that no electrical components need be mounted to the attachment (20).
Claims12
A lift truck attachment for handling loads, comprising:
- a frame having mounting means for releasable attachment to the carriage of a lift truck;
- a first pair of load lifting fork members, said frame having a lateral bearing surface and mounting means mounting said first pair of fork members to said bearing surface for independent lateral sliding movement of the fork members relative to each other on said frame;
- a second pair of load lifting fork members, and mounting means mounting said second pair of fork members to said bearing surface for independent slidable movement of the fork members relative to each other on said frame;
- first actuation means mounted between the fork members of the first pair of fork members for spacing and controlling the spacing between the fork members of the first pair of fork members;
- second actuation means mounted between the fork members of the second pair of fork members for spacing and controlling the spacing between the fork members of the second pair of fork members, the first and second actuation means being operable independently of one another;
- and
- third actuation means controlling the distance between the first pair of fork members and the second pair of fork members, and mounting means mounting said third actuation means to said frame and to each of said pairs of fork members for equal and simultaneous opposed lateral sliding movement of said first pair of fork members relative to said second pair of fork members and both of said fork members of both of said first and second pairs of fork members all being simultaneously moved by said third actuation means relative to said frame.
A lift truck attachment for handling loads, comprising:
- a frame and mounting means for releasable attachment of the frame to the carriage of a lift truck;
- a first pair of load lifting fork members, said frame having a lateral bearing surface and mounting means mounting said fork members to said bearing surface;
- a second pair of load lifting fork members, and mounting means mounting said fork members to said bearing surface;
- said first and second pairs of fork members mounted for lateral sliding movement relative to the frame and mounted for opposed lateral sliding movement relative to each other;
- and
- said lateral bearing surface of said frame defining a guide path that is slightly angled to guide the pairs of fork members respectively in an upwardly and oppositely directed path as the pair of fork members are extended laterally in opposed directions.
Dependencies are inferred from the claim text.