US3572530A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Industrial truck
Assignee: Eaton Corp
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Filing: 1969-04-16
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Granted: 1971-03-30
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Expires: 1989-04-16
Abstract
Abstract In an industrial truck a carriage is mounted for vertical movement on a pair of spaced uprights. An arm base roll is mounted on said carriage for movement transversely of the truck. A load arm rotates on said base on a generally vertical axis so as to be movably positionable with respect to an axis extending transversely of the truck. A load carrier is pivoted on a generally vertical axis at the end of the load arm opposite its pivot on the arm base. By rotating both the load carrier and the load arm, a load on the carrier may be moved to one side or the other of the truck and also forwardly, without at any time moving the load relatively to the truck to a position where it will greatly effect the stability of the truck.
Inventors
- 👤 Frederick F Ohntrup
- 👤 Russell A Cornwall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:51
CPC Classifications
B; B66; B66F; B66F9/00; B66F9/06; B66F9/075; B66F9/12; B66F9/14; B66F9/147
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
111 words
For use with a truck of the class described: a carriage; an arm base mounted on the carriage for generally horizontal movement therealong; first means for moving the arm base along the carriage; a load arm pivotably mounted on said arm base; second means for pivoting the load arm relatively to the arm base; a load carrier pivotably mounted on the load arm; third means for pivoting the load carrier relative to the load arm; a frame pivotably mounted on the load arm; a load fork slidably mounted on the frame; and fourth means operatively associated with the frame and the fork for moving the load fork horizontally along the frame.
Claim 2
Dependent Claim
111 words
For use with a truck of the class described: a carriage; an arm base mounted on the carriage for generally horizontal movement therealong; first means for moving the arm base along the carriage; a load arm pivotably mounted on said arm base; second means for pivoting the load arm relatively to the arm base; a load carrier pivotably mounted on the load arm; third means for pivoting the load carrier relative to the load arm; a frame pivotably mounted on the load arm; a load fork slidably mounted on the frame; and fourth means operatively associated with the frame and the fork for moving the load fork horizontally along the frame.
Claim 3
Dependent Claim
55 words
The combination of claim 1, wherein the load arm further comprises: a first beam pivotably mounted on the arm base for pivotal movement about a vertical axis; a second beam pivotably mounted on the first beam for pivotal movement about a horizontal axis; and fifth means for pivoting the second beam about said horizontal axis.
Claim 4
Dependent Claim
36 words
The combination of claim 1, wherein the first means, the second means and third means are operatively interconnected and including control means for synchronously controlling the operation of the first means, second means and third means.
Claim 5
Dependent Claim
98 words
In a truck of the class described including a wheeled frame section and vertical upright thereon, the improved combination comprising: a carriage mounted on the upright for substantially vertical movement therealong; an arm base mounted on the carriage for horizontal movement thereacross; a load arm pivotably mounted about a substantially vertical axis on the arm base for pivotal movement with respect thereto; a load carrier pivotally mounted about a substantially vertical axis on the load arm for pivotal movement with respect thereto; and hydraulic means for effecting controlled relative compound movement between the load carrier and the carriage.
Claim 6
Dependent Claim
98 words
In a truck of the class described including a wheeled frame section and vertical upright thereon, the improved combination comprising: a carriage mounted on the upright for substantially vertical movement therealong; an arm base mounted on the carriage for horizontal movement thereacross; a load arm pivotably mounted about a substantially vertical axis on the arm base for pivotal movement with respect thereto; a load carrier pivotally mounted about a substantially vertical axis on the load arm for pivotal movement with respect thereto; and hydraulic means for effecting controlled relative compound movement between the load carrier and the carriage.
Claim 7
Dependent Claim
49 words
The combination of claim 4 wherein the load arm further comprises: a first beam pivotably mounted on the arm base; a second beam pivotably mounted on the first beam for pivotal movement about a substantially horizontal axis; and means for effecting pivotal movement between the first and second beams.
Claim 8
Dependent Claim
21 words
The combination of claim 4 wherein the arm base, load arm and load carrier are synchronously driven by the hydraulic means.
Claim 9
Dependent Claim
88 words
The combination of claim 6 wherein the hydraulic means comprise; first means for moving the arm base along the carriage; second means for pivoting the load arm relative to the arm base and hydraulically connected to the first means in parallel; third means for pivoting the load carrier relative to the load arm and hydraulically connected to the second means in series; a pump for supplying hydraulic fluid to the first means; and a control valve for regulating hydraulic fluid flow from the pump to the first means.
Claim 10
Dependent Claim
43 words
The combination of claim 4 wherein the load carrier comprises: a frame pivotably mounted on the load arm; a load fork slidably mounted on the frame; and means operatively associated with the frame and the fork for moving the fork along the frame.
References Cited (Backward Citations)
US3106305A
Cited
US3356241A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-29 | 1974-09-28 | 1975-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-29 | 1978-09-28 | 1979-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-29 | 1982-09-28 | 1983-03-30 | $7700.00 | Window Closed / Lapsed |