US3601153A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gear change mechanisms
Assignee: Wabco Automotive UK Ltd
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Filing: 1969-01-23
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Granted: 1971-08-24
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Expires: 1989-01-23
Abstract
Abstract A manual control device for a fluid-pressure actuated gear change mechanism, said device comprising a hand lever, movable in at least two directions in a valve housing containing at least four valves, and a casing adapted to be secured to a gearbox and housing at least four cylinders, each of said cylinders being connected via one of said valves to a source of pressure fluid; wherein movement of the hand lever to a position to select a gear is effective to exhaust the pressure fluid from at least one of the cylinders and the pressure fluid acting on pistons in the remaining cylinders being effective to select the said gear and to maintain the hand lever in the selected bar position.
Inventors
- 👤 Wilbur Mills Page
- 👤 Ralph Coupland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:39
CPC Classifications
F; F16; F16H; F16H61/00; F16H61/26; F16H61/28; F16H61/30; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87056; Y10T137/87072; Y10T137/87169; Y10T137/87233; Y10T137/87241
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
211 words
A manual control device for a fluid-pressure actuated gear change mechanism, said device comprising a housing containing at least four valves arranged in opposing pairs, each valve including a piston; a hand lever mounted in said housing, said hand lever being movable in at least two directions and being engageable with said valve pistons; a casing adapted to be secured to a Gearbox and having at least four cylinders, said cylinders being arranged in pairs and each cylinder having a piston and at least one fluid port; and pressure fluid lines connecting each of said cylinders to a respective valve; each of said pistons in the valve housing containing a valve member arranged to engage a valve seat on the piston in one position of the valve and to engage a second valve seat in a second position of the valve when said piston is engaged and displaced by the hand lever, the valve member in said second position connecting the associated cylinder to atmosphere via the respective pressure fluid connecting line, and said hand lever being movable to engage a valve piston in order to select a gear in said gearbox and being held in said gear-selected position by pressure fluid acting on the opposing valve piston of the pair.
Claim 2
Dependent Claim
211 words
A manual control device for a fluid-pressure actuated gear change mechanism, said device comprising a housing containing at least four valves arranged in opposing pairs, each valve including a piston; a hand lever mounted in said housing, said hand lever being movable in at least two directions and being engageable with said valve pistons; a casing adapted to be secured to a Gearbox and having at least four cylinders, said cylinders being arranged in pairs and each cylinder having a piston and at least one fluid port; and pressure fluid lines connecting each of said cylinders to a respective valve; each of said pistons in the valve housing containing a valve member arranged to engage a valve seat on the piston in one position of the valve and to engage a second valve seat in a second position of the valve when said piston is engaged and displaced by the hand lever, the valve member in said second position connecting the associated cylinder to atmosphere via the respective pressure fluid connecting line, and said hand lever being movable to engage a valve piston in order to select a gear in said gearbox and being held in said gear-selected position by pressure fluid acting on the opposing valve piston of the pair.
Claim 3
Dependent Claim
41 words
A device as claimed in claim 1, the valves of each pair lying on a common axis and the two axes being disposed in planes that are at right angles to each other with one axis arranged vertically above the other.
Claim 4
Dependent Claim
27 words
A device as claimed in claim 1, in which the casing contains four cylinders arranged in pairs, the cylinders of each pair lying on a common axis.
Claim 5
Dependent Claim
24 words
A device as claimed in claim 3, in which the two axes are disposed in planes that are at right angles to each other.
Claim 6
Dependent Claim
57 words
A device as claimed in claim 3, in which the piston in each cylinder is arranged to act on a gearbox striker, whereby operation of the hand lever to a selected gear position is effective to cause at least one of the pistons to move the gearbox striker to select the selected gear in the associated gearbox.
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) | 1974-08-23 | 1975-02-22 | 1975-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-23 | 1979-02-22 | 1979-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-23 | 1983-02-22 | 1983-08-24 | $7700.00 | Window Closed / Lapsed |