US3894616A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Forklift
Assignee: Toyota Industries Corp
•
Filing: 1973-07-23
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Granted: 1975-07-15
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Expires: 1993-07-23
Abstract
Abstract The hydraulic conduits which operate an attachment on the carriage of a forklift pass vertically up in back of the carriage-lifting ram, then each pass over a pair of sheaves mounted above this ram, then pass down in front of the ram, always lying within the projection of the ram in the normal direction of travel. The sheaves are secured between a pair of brackets carried on the piston rod of the ram, on the extensible uprights within the forklift mass assembly, or on both of these elements. Tie rods adjacent the sheaves in their regions of contact with the conduits prevent these conduits from jumping off the sheaves.
Inventors
- 👤 Kunihisa Kawanishi
- 👤 Shuji Ohta
- 👤 Seigo Shimizu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:21
CPC Classifications
B; B66; B66F; B66F9/00; B66F9/06; B66F9/075; B66F9/08; B66F9/20; B66F9/205; Y; Y10; Y10S; Y10S414/00; Y10S414/131
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
211 words
A forklift comprising: a body adapted to travel along the ground in a normal travel direction; a mast assembly on said body including a pair of relatively fixed uprights and a pair of movable uprights vertically displaceable on said fixed uprights; a carriage vertically displaceable on said mast assembly; a fluid ram operatively connected to said carriage and disposed between said uprights, said fluid ram including an extensible piston rod; a cross-brace fixedly attached to said pair of movable uprights; a sprocket-wheel support fixedly mounted on said piston rod; a pair of spaced apart brackets secured to said cross-brace; a pair of sheaves journaled on said brackets including a forwardly disposed sheave and a rearwardly disposed sheave, at least one of said sheaves lying in the vertical projection of said piston rod and directly over said piston rod while being spaced below said cross-brace; a pair of fasteners interconnecting said cross-brace and said support; a fluid operated attachment on said carriage; and at least two flexible hydraulic conduits connected between said attachment and said body, said conduits being reeved over both of said sheaves and passing through said projection and between said fasteners, said sheaves being positioned to maintain the maximum bend of said conduits over either sheave at about 120*.
Claim 2
Dependent Claim
211 words
A forklift comprising: a body adapted to travel along the ground in a normal travel direction; a mast assembly on said body including a pair of relatively fixed uprights and a pair of movable uprights vertically displaceable on said fixed uprights; a carriage vertically displaceable on said mast assembly; a fluid ram operatively connected to said carriage and disposed between said uprights, said fluid ram including an extensible piston rod; a cross-brace fixedly attached to said pair of movable uprights; a sprocket-wheel support fixedly mounted on said piston rod; a pair of spaced apart brackets secured to said cross-brace; a pair of sheaves journaled on said brackets including a forwardly disposed sheave and a rearwardly disposed sheave, at least one of said sheaves lying in the vertical projection of said piston rod and directly over said piston rod while being spaced below said cross-brace; a pair of fasteners interconnecting said cross-brace and said support; a fluid operated attachment on said carriage; and at least two flexible hydraulic conduits connected between said attachment and said body, said conduits being reeved over both of said sheaves and passing through said projection and between said fasteners, said sheaves being positioned to maintain the maximum bend of said conduits over either sheave at about 120*.
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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) | 1978-07-14 | 1979-01-13 | 1979-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-14 | 1983-01-13 | 1983-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-14 | 1987-01-13 | 1987-07-15 | $7700.00 | Window Closed / Lapsed |