Patent US4813705A successfully refreshed from Google Patents.
US4813705A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spring system for vehicles, especially motor vehicles
Assignee: Bayerische Motoren Werke AG
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Filing: 1987-11-09
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Granted: 1989-03-21
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Expires: 2007-11-09
Abstract
Abstract In a vehicle spring system, the rear wheel spring system is constructed as active spring system and the front wheel spring system as passive spring system. The control pulses for the active rear wheel spring system are supplied from the vehicle front wheels which act as road surface sensors.
Inventors
- 👤 Hans Hagen
- 👤 Rudolf Mueller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:38
CPC Classifications
B; B60; B60G; B60G17/00; B60G17/015; B60G17/016; B60G17/0165
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
137 words
A spring system for vehicles, especially motor vehicles, which is arranged between vehicle wheels and a body means, comprising a rear wheel spring system contructed exclusively as an active spring system means for adjusting the distance between the rear wheels and the body, a front wheel spring system constructed exclusively as a passive spring system means for adjusting the spring effect of the front wheels, and the vehicle front wheels being contructed as road sensor means and are operatively connected with the active rear wheel spring system means by way of regulating means to effect an adjustment of the height between the rear wheels and the body within a period of time it takes for the rear wheels to attain the position of the front wheels when the front wheel sensor sensed a need for height adjustment.
Claim 2
Dependent Claim
137 words
A spring system for vehicles, especially motor vehicles, which is arranged between vehicle wheels and a body means, comprising a rear wheel spring system contructed exclusively as an active spring system means for adjusting the distance between the rear wheels and the body, a front wheel spring system constructed exclusively as a passive spring system means for adjusting the spring effect of the front wheels, and the vehicle front wheels being contructed as road sensor means and are operatively connected with the active rear wheel spring system means by way of regulating means to effect an adjustment of the height between the rear wheels and the body within a period of time it takes for the rear wheels to attain the position of the front wheels when the front wheel sensor sensed a need for height adjustment.
Claim 3
Dependent Claim
35 words
A spring system according to claim 1, further comprising adjustable shock absorber means coordinated to the passive spring system means of the front wheels, said adjustable shock absorber means being selectively adjustable within given limits.
Claim 4
Dependent Claim
39 words
A spring system according to claim 2, further comprising control means for controlling the shock absorber means from the active spring system means of the rear wheels in response to height changes between the rear wheels and the body.
Claim 5
Dependent Claim
24 words
A spring system according to claim 3, wherein for a quasi-stationary condition said control means adjusts the shock absorber means in correct phase relationship.
References Cited (Backward Citations)
DE192178C
Cited
US3124368A
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DE2738455A1
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DE3308011A1
Cited
DE3424979A1
Cited
DE3434757A1
Cited
US4690429A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-03-20 | 1992-09-19 | 1993-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-03-20 | 1996-09-19 | 1997-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-03-20 | 2000-09-19 | 2001-03-21 | $7700.00 | Window Closed / Lapsed |