Patent US3415797A successfully refreshed from Google Patents.
Patent US3918544A successfully refreshed from Google Patents.
US3918544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motor vehicle steering gear
Assignee: ZF Friedrichshafen AG
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Filing: 1974-10-22
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Granted: 1975-11-11
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Expires: 1994-10-22
Abstract
Abstract A vehicle steering gear in which an angle drive interconnects transversely disposed steering wheel shaft and actuator screw spindle. The housing enclosing the screw spindle extends only rearwardly of the vehicle from the gear casing enclosing the angle drive and prevents axial and radial displacement of the screw spindle. Angular twist of the actuator is prevented by means located adjacent the rear end of the housing.
Inventors
- 👤 Erich Jablonsky
- 👤 Wolfgang Pfundstein
- 👤 Dieter Elser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:51
CPC Classifications
B; B62; B62D; B62D5/00; B62D5/06; B62D5/20; B62D5/24
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
188 words
A steering gear assembly adapted for motor vehicles or the like, comprising a steering shaft (5), a screw spindle (7) disposed transversely of the steering shaft, intermeshing bevel gears (4 and 6) respectively connected to the steering shaft and the screw spindle, a gear casing (3) enclosing the bevel gears and rotatably supporting the steering shaft, an elongated housing (8) connected to the gear casing and enclosing the screw spindle, means for rotatably supporting the screw spindle within the housing while preventing axial and radial displacement thereof, a steering nut (9) drivingly engaged with the screw spindle and axially displaceable within the housing, a piston (11) fixedly connected to the nut, a tubular actuator (12) connected to the piston and axially displaceable therewith relative to the housing, means (25) for preventing angular displacement of the actuator relative to the housing, a fluid chamber (21) enclosed within the actuator, means (22) mounted on tHe screw spindle for sealing said fluid chamber in axially spaced relation to the gear casing, and pressure compensating means (23) for establishing fluid communication between the chamber and the gear casing through the screw spindle.
Claim 2
Dependent Claim
188 words
A steering gear assembly adapted for motor vehicles or the like, comprising a steering shaft (5), a screw spindle (7) disposed transversely of the steering shaft, intermeshing bevel gears (4 and 6) respectively connected to the steering shaft and the screw spindle, a gear casing (3) enclosing the bevel gears and rotatably supporting the steering shaft, an elongated housing (8) connected to the gear casing and enclosing the screw spindle, means for rotatably supporting the screw spindle within the housing while preventing axial and radial displacement thereof, a steering nut (9) drivingly engaged with the screw spindle and axially displaceable within the housing, a piston (11) fixedly connected to the nut, a tubular actuator (12) connected to the piston and axially displaceable therewith relative to the housing, means (25) for preventing angular displacement of the actuator relative to the housing, a fluid chamber (21) enclosed within the actuator, means (22) mounted on tHe screw spindle for sealing said fluid chamber in axially spaced relation to the gear casing, and pressure compensating means (23) for establishing fluid communication between the chamber and the gear casing through the screw spindle.
Claim 3
Dependent Claim
49 words
The combination of claim 1 wherein said means preventing angular displacement of the actuator includes a cross-sectionally polygonal external profile (25) on the actuator and means (8a) located adjacent an axial end of the housing opposite the gear casing in slide bearing relation to said profile of the actuator.
Claim 4
Dependent Claim
20 words
The combination of claim 2 wherein said housing extends rearwardly only from the gear casing relative to the motor vehicle.
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) | 1978-11-10 | 1979-05-12 | 1979-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-10 | 1983-05-12 | 1983-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-10 | 1987-05-12 | 1987-11-11 | $7700.00 | Window Closed / Lapsed |