US3771383A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Servo steering mechanism for vehicles
Assignee: Daimler Benz AG
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Filing: 1971-12-03
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Granted: 1973-11-13
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Expires: 1991-12-03
Abstract
Abstract A servo-steering mechanism for vehicles in which a steering nut spirally movably connected with the steering worm is rotatably supported in the working piston connected with the steering shaft while the steering nut is supported with respect to the working piston in both axial directions of the piston axis by way of compression springs, preferably cup spring pairs.
Inventors
- 👤 H Forster
- 👤 K Katz
- 👤 M Bulow
- 👤 A Scheuter
- 👤 J Bordovsky
- 👤 G Wuchter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:41
CPC Classifications
B; B62; B62D; B62D3/00; B62D3/02; B62D3/04; B62D3/06; B62D3/08; B62D5/00; B62D5/06; B62D5/20; B62D5/24
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
130 words
A servo-steering mechanism for vehicles, in which a steering nut means spirally movably connected with a steering worm means is supported so as to be movable in the rotary direction within a working piston means operatively connected with a steering shaft, said steering nut means being supported in both directions of the piston axis by way of compression spring means with respect to the working piston means, characterized by at least two compression spring means supporting the steering nut means in a given direction which possess differing spring constants, of which in the axial neutral position between steering nut means and working piston means the compression spring means with the higher spring constant is substantially stress-free and at least one compression spring means with lower spring constant is under prestress.
Claim 2
Dependent Claim
130 words
A servo-steering mechanism for vehicles, in which a steering nut means spirally movably connected with a steering worm means is supported so as to be movable in the rotary direction within a working piston means operatively connected with a steering shaft, said steering nut means being supported in both directions of the piston axis by way of compression spring means with respect to the working piston means, characterized by at least two compression spring means supporting the steering nut means in a given direction which possess differing spring constants, of which in the axial neutral position between steering nut means and working piston means the compression spring means with the higher spring constant is substantially stress-free and at least one compression spring means with lower spring constant is under prestress.
Claim 3
Dependent Claim
19 words
A servo-steering system according to claim 1, characterized in that the compression spring means are pairs of cup springs.
Claim 4
Dependent Claim
29 words
A servo-steering system according to claim 1, characterized in that at least one bearing means of the steering nut means is arranged in series with a compression spring means.
Claim 5
Dependent Claim
49 words
A servo-steering system according to claim 3, characterized in that the steering nut means is supported in the piston means by bearing means including an inclined ball bearing and an axial roller bearing, of which is least one bearing means is arranged in series with respective compression spring means.
Claim 6
Dependent Claim
22 words
A servo-steering system according to claim 4, characterized in that both bearing means are arranged in series with respect compression spring means.
Claim 7
Dependent Claim
20 words
A servo-steering system according to claim 5, characterized in that the compression spring means consist of pairs of cup springs.
Claim 8
Dependent Claim
49 words
A servo-steering system according to claim 1, characterized in that the steering nut means is supported in the piston means by bearing means including an inclined ball bearing and an axial roller bearing of which at least one bearing means is arranged in series with respective compression spring means.
Claim 9
Dependent Claim
22 words
A servo-steering system according to claim 7, characterized in that both bearing means are arranged in series with respect compression spring means.
Claim 10
Dependent Claim
20 words
A servo-steering system according to claim 7, characterized in that the compression spring means consist of pairs of cup springs.
Claim 11
Dependent Claim
103 words
A servo-steering mechanism for vehicles, in which a steering nut means spirally movably connected with a steering worm means is supported so as to be movable in the rotary direction within a working piston means operatively connected with a steering shaft, wherein the steering nut means is supported in at least one direction of the piston axis by way of resilient means with respect to the working piston means, and wherein said resilient means exhibits a variable effective spring constant which is dependent on the distance said steering nut means is from a neutral central position with respect to said working piston means.
Claim 12
Dependent Claim
103 words
A servo-steering mechanism for vehicles, in which a steering nut means spirally movably connected with a steering worm means is supported so as to be movable in the rotary direction within a working piston means operatively connected with a steering shaft, wherein the steering nut means is supported in at least one direction of the piston axis by way of resilient means with respect to the working piston means, and wherein said resilient means exhibits a variable effective spring constant which is dependent on the distance said steering nut means is from a neutral central position with respect to said working piston means.
Claim 13
Dependent Claim
47 words
A servo-steering mechanism according to claim 10 wherein said resilient means resiliently opposes movement of said steering nut means from said neutral central position, and wherein said spring constant is smaller for movement close to said neutral central position than for movement further from said neutral position.
Claim 14
Dependent Claim
23 words
A servo-steering mechanism according to claim 10, wherein said resilient means supports said steering nut means in both directions of the piston axis.
Claim 15
Dependent Claim
48 words
A servo-steering mechanism according to claim 12, wherein said resilient means resiliently opposes movement of said steering nut means from said neutral central position, and wherein said spring constant is smaller for movement close to said neutral central position than for movement further from said neutral central position.
Claim 16
Dependent Claim
64 words
A servo-steering mechanism according to claim 13, wherein said resilient means includes at least two spring means supporting the steering nut means in a given direction which possess different spring constants, the spring means with the lower spring constant being under prestress and the spring means with the higher spring constant being stress-free when the steering nut means is in said neutral central position.
Claim 17
Dependent Claim
14 words
A servo-steering mechanism according to claim 14, wherein said spring means are compression springs.
Claim 18
Dependent Claim
14 words
A servo-steering mechanism according to claim 15, wherein said spring means are cup springs.
References Cited (Backward Citations)
US2144489A
Cited
US3476203A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-12 | 1977-05-14 | 1977-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-12 | 1981-05-14 | 1981-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-12 | 1985-05-14 | 1985-11-13 | $7700.00 | Window Closed / Lapsed |