US3688929A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lift truck with rotatable carriage
Assignee: DELTA RESOURCES INCORPORATED A CORP OF WA
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Filing: 1970-09-30
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Granted: 1972-09-05
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Expires: 1990-09-30
Abstract
Abstract The lift truck described herein includes a front-mounted fork lift carriage supported by a pivot member positioned to one side of its center. To the pivot member is attached a large lift arm supported at its opposite end on a mast at the right rear of the truck chassis, which arm is moved upwardly by means of a hydraulic motor carried on the truck chassis. The operator''s cab is located on the left side of the centerline of the truck, and the engine, transmission and differential are essentially centered in the chassis. A linkage carried on the lift arm permits the carriage to be kept level or tilted as needed during raising or lowering of the load. When elevated, the carriage and load may be rotated around the pivot member to place the load in a laterally facing position above the operator''s cab. When so rotated, the center of gravity of the load is carried well within the maximum width of the vehicle, and no portion of the carriage or lift mechanism extends significantly beyond the maximum tread width as defined by the outside edges of the tires, although the load may extend beyond the tread width.
Inventors
- 👤 Maurice J Mcintyre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:05
CPC Classifications
B; B66; B66F; B66F9/00; B66F9/06; B66F9/065
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
192 words
A lift truck comprising a chassis and rearwardly and forwardly mounted wheel assemblies fastened to said chassis, an operator''s cab mounted on said chassis between said wheel assemblies and to one side of said chassis such that its lowest point is not substantially above the axis of rotation of said wheel assemblies, a prime mover carried on said chassis and drivably connected to at least one of said wheel assemblies, a vertically extending support mast mounted toward the rear of said chassis and at the opposite side from said cab, a lift carriage for lifting and carrying a load to be picked up at the front of said truck and a pivot arm connecting said carriage to said support member, said connection including a pivot member permitting said carriage to rotate around a substantially vertical axis, and first motor means fastened between said pivot member and said carriage to effect said rotation such that said load is carried above said cab with its center of gravity well within the tread width of said truck; and second motor means for raising and lowerIng said pivot arm to raise and lower said lift carriage.
Claim 2
Dependent Claim
192 words
A lift truck comprising a chassis and rearwardly and forwardly mounted wheel assemblies fastened to said chassis, an operator''s cab mounted on said chassis between said wheel assemblies and to one side of said chassis such that its lowest point is not substantially above the axis of rotation of said wheel assemblies, a prime mover carried on said chassis and drivably connected to at least one of said wheel assemblies, a vertically extending support mast mounted toward the rear of said chassis and at the opposite side from said cab, a lift carriage for lifting and carrying a load to be picked up at the front of said truck and a pivot arm connecting said carriage to said support member, said connection including a pivot member permitting said carriage to rotate around a substantially vertical axis, and first motor means fastened between said pivot member and said carriage to effect said rotation such that said load is carried above said cab with its center of gravity well within the tread width of said truck; and second motor means for raising and lowerIng said pivot arm to raise and lower said lift carriage.
Claim 3
Dependent Claim
34 words
A lift truck as set forth in claim 1 including a linkage connected between said lift carriage and said pivot member and third motor means connected in said linkage for tilting said lift carriage.
Claim 4
Dependent Claim
24 words
A lift truck as set forth in claim 2 wherein said linkage is a parallelogram linkage and said motor means is a hydraulic motor.
Claim 5
Dependent Claim
34 words
A lift truck as set forth in claim 1 wherein said prime mover is an engine connected between said wheel assemblies, forward of said support mast, and substantially centered relative to said wheel assemblies.
Claim 6
Dependent Claim
22 words
A lift truck as set forth in claim 1 wherein stanchion members are fastened to said chassis for supporting the rotated load.
Claim 7
Dependent Claim
26 words
A lift truck as set forth in claim 1 wherein said support member and pivot arm are located within the maximum tread width of said truck.
Claim 8
Dependent Claim
25 words
A lift truck as set forth in claim 1 wherein said second motor means is a hydraulic motor pivotally mounted with respect to said chassis.
Claim 9
Dependent Claim
42 words
A lift truck as set forth in claim 2 wherein said pivot member includes a pair of spaced, vertically aligned bearing structures and a lever attached at one end to said carriage and at its opposite end to said first motor means.
Claim 10
Dependent Claim
40 words
A lift truck as set forth in claim 8 wherein said pivot member includes a pair of spaced, horizontally aligned bearing structures, and pivotable support means is carried in said bearing structures connecting said lift arm to said pivot member.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-05 | 1976-03-06 | 1976-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-05 | 1980-03-06 | 1980-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-05 | 1984-03-06 | 1984-09-05 | $7700.00 | Window Closed / Lapsed |