Patent US4503753A successfully refreshed from Google Patents.
US4503753A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic power-assistance actuating mechanisms, especially for servo-assisted steering systems
Assignee: AlliedSignal Automotive Espana SA
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Filing: 1982-09-17
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Granted: 1985-03-12
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Expires: 2002-09-17
Abstract
Abstract The actuating mechanism comprises a force step-up transmission with an output member (25) and an input member (17) connected to a control system via a hydraulic distributor (16), these input and output members being coaxial, the step-up transmission consisting of a coaxial train of epicyclic gears (32, 37, 38), and the double-acting power-assistance motor comprises a likewise coaxial rotor (9) with blades (10) which is connected to the output member (25) and which rotates in a cavity (7) formed by the box (4) of the mechanism.
Inventors
- 👤 Juan S. Bacardit
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:05
CPC Classifications
B; B62; B62D; B62D5/00; B62D5/06; B62D5/10; B62D5/14
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
198 words
A hydraulic power-assistance actuating mechanism comprising: a casing housing a force step-up transmission having a rotary output member intended to be connected to a driven system to be actuated and a rotary input member intended to be connected to a driven system, a hydraulic distributor having a rotor member coupled for rotation with said input member and a stator member coupled for rotation with said output member, said rotor member and stator member being capable of a limited relative rotational displacement to selectively actuate at least one double-acting assistance hydraulic motor coupled to said output member, characterized in that said input and output members of the mechanism are coaxially aligned, and the force step-up transmission comprises a coaxial epicyclic gear train which includes a sun gear coupled for rotation with the stator member of the distributor and at least one planet gear carried by a transverse arm coupled to said output member, the double-acting assistance hydraulic motor comprising a bladed rotor coaxial with the input and output members and having radially extending blades, the bladed rotor coupled for rotation with said output member and sealingly and slidingly rotating in a cavity formed in the casing of said mechanism.
Claim 2
Dependent Claim
198 words
A hydraulic power-assistance actuating mechanism comprising: a casing housing a force step-up transmission having a rotary output member intended to be connected to a driven system to be actuated and a rotary input member intended to be connected to a driven system, a hydraulic distributor having a rotor member coupled for rotation with said input member and a stator member coupled for rotation with said output member, said rotor member and stator member being capable of a limited relative rotational displacement to selectively actuate at least one double-acting assistance hydraulic motor coupled to said output member, characterized in that said input and output members of the mechanism are coaxially aligned, and the force step-up transmission comprises a coaxial epicyclic gear train which includes a sun gear coupled for rotation with the stator member of the distributor and at least one planet gear carried by a transverse arm coupled to said output member, the double-acting assistance hydraulic motor comprising a bladed rotor coaxial with the input and output members and having radially extending blades, the bladed rotor coupled for rotation with said output member and sealingly and slidingly rotating in a cavity formed in the casing of said mechanism.
Claim 3
Dependent Claim
33 words
The mechanism according to claim 1, characterized in that the stator member of the distributor has an end part rotatingly received in an axial recess formed in the output member of the mechanism.
Claim 4
Dependent Claim
49 words
The mechanism according to claim 2, characterized in that the planet gear has an inner portion extending in a radial side aperture in the output member so as to engage with the sun gear formed on said end part of the stator member which extends in said axial recess.
Claim 5
Dependent Claim
19 words
The mechanism according to claim 1, characterized in that the distributor is mounted within the casing of the mechanism.
Claim 6
Dependent Claim
33 words
The mechanism according to claim 4, in which the stator member surrounds the rotor member, characterized in that the stator member is received partially in a coaxial central bore of the bladed rotor.
Claim 7
Dependent Claim
29 words
The mechanism according to claim 3, characterized in that the planet gear intermeshes with a peripheral toothed ring formed on the inner surface of the casing of the mechanism.
Claim 8
Dependent Claim
25 words
The mechanism according to claim 6, characterized in that the output member of the mechanism is rotatingly supported in a front cover of the casing.
Claim 9
Dependent Claim
34 words
The mechanism according to claim 1, characterized in that the cavity in which the bladed rotor rotates has stationary radial partitions interacting in leakproof contact engagement with a hub portion of the bladed rotor.
Claim 10
Dependent Claim
18 words
The mechanism according to claim 6, characterized in that gears of the epicyclic gear train have straight toothing.
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) | 1988-03-11 | 1988-09-10 | 1989-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-03-11 | 1992-09-10 | 1993-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-03-11 | 1996-09-10 | 1997-03-12 | $7700.00 | Window Closed / Lapsed |