US3727778A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Material handling system
Assignee: Drexel Industries Inc
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Filing: 1971-07-08
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Granted: 1973-04-17
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Expires: 1991-07-08
Abstract
Abstract A fork lift truck, in preferred form, has a base frame, a rack frame, a mast, and an operator''s platform. There is no center section at the bottom of the vehicle. The assembly is held together at the top with an arch formed by the mast and the truck rack frame. Two tie bars, one on each side on the vehicle, tie the frame together near the bottom. The tie bars are adjustable for height. A rigid mast supports an assembly which includes a carriage having a pivot-and-slide mechanism and a reach mechanism on which the fork is mounted. The pivot-and-slide mechanism permits the reach mechanism and its fork to be rotated and to be slidingly moved transversely from one side to the other. Thus, the mechanism permits the forks to deposit or to withdraw a load in both forward and side positions. An operator''s platform is mounted on the truck forward of the mast.
Inventors
- 👤 E Hollenbach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:39
CPC Classifications
B; B66; B66F; B66F9/00; B66F9/06; B66F9/075; B66F9/12; B66F9/14
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
203 words
A material handling fork lift vehicle for handling palletized loads, said vehicle comprising: a. a wheeled chassis; b. a rack tower on said chassis at one end thereof; c. said rack tower including a plurality of load-receiving compartments arranged vertically one above the other; d. a mast and an elevatable fork lift assembly on said mast and spaced from said rack tower; e. said fork lift assembly including a fork and means for pivoting said fork through 180* to direct said fork toward either side of said chassis or straight ahead towards said rack tower; f. means for effecting relative movement between said fork and said rack tower for moving said fork into and out of any selective one of said rack tower compartments, g. said means for effecting relative movement between said fork and said rack tower including means for contracting and expanding said chassis to move said rack tower and fork toward and away from each other, said fork being non-extensible relative to said mast; h. in the expanded condition of said chassis the space between the mast and the rack being greater than the length of the fork, the contraction of the chassis causing the fork to enter the rack.
Claim 2
Dependent Claim
203 words
A material handling fork lift vehicle for handling palletized loads, said vehicle comprising: a. a wheeled chassis; b. a rack tower on said chassis at one end thereof; c. said rack tower including a plurality of load-receiving compartments arranged vertically one above the other; d. a mast and an elevatable fork lift assembly on said mast and spaced from said rack tower; e. said fork lift assembly including a fork and means for pivoting said fork through 180* to direct said fork toward either side of said chassis or straight ahead towards said rack tower; f. means for effecting relative movement between said fork and said rack tower for moving said fork into and out of any selective one of said rack tower compartments, g. said means for effecting relative movement between said fork and said rack tower including means for contracting and expanding said chassis to move said rack tower and fork toward and away from each other, said fork being non-extensible relative to said mast; h. in the expanded condition of said chassis the space between the mast and the rack being greater than the length of the fork, the contraction of the chassis causing the fork to enter the rack.
Claim 3
Dependent Claim
25 words
Apparatus according to claim 1 wherein said means for contracting and expanding said chassis include rack and pinion means at each side of said chassis.
Claim 4
Dependent Claim
76 words
Apparatus according to claim 2 wherein said rack and pinion means include: a. a first pair of racks having one end fixed to said rack tower at each side of said chassis, said racks projecting toward said mast; b. a second pair of racks fixed to said mast; c. a pinion in mesh with racks of said first and second pairs at each side of said chassis; d. piston means for pulling and pushing said pinions.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-16 | 1976-10-16 | 1977-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-16 | 1980-10-16 | 1981-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-16 | 1984-10-16 | 1985-04-17 | $7700.00 | Window Closed / Lapsed |