US3841653A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilization means for motor vehicles
Assignee: Langen and Co
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Filing: 1972-06-15
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Granted: 1974-10-15
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Expires: 1992-06-15
Abstract
Abstract Stabilization means for motor vehicles provided with a pneumatic or hydro-pneumatic suspension system and a level-regulating device which, depending upon the distance between the wheel supports and the vehicle body, in a first control position supplies pressure medium from a pressure source into the working space of one or a plurality of resilient elements mounted between the wheel supports and the vehicle body, and in a second control position, removes the pressure medium from the working space while in a third control position which is in accordance with the level position, blocks the working space, together with a hydraulic servo-steering device with a pressure source, a control valve and a servo-motor so that a change-over valve having an influencing effect on the level-regulating device is activated during operation of the steering device, in which the change-over valve is series-connected with the level-regulating device suchwise that in a first position in accordance with driving along straight ways, the level-regulating device functions normally, while in a second position during driving along curving or winding roads, the effect of the level-regulating device is suspended, whereby the switching of the change-over valve from the first position into the second position is effected hydraulically with the assistance of the pressure-difference or the pressure-increase which develops within the servo-steering device during driving on curving or winding roads.
Inventors
- 👤 G Strauff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:38
CPC Classifications
B; B60; B60G; B60G17/00; B60G17/02; B60G17/04; B60G21/00; B60G21/10; B60G21/106
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
213 words
A Stabilization device for motor vehicles provided with a hydro-pneumatic suspension system and a level-regulating device which, depending on the distance between wheel supports and a vehicle body, in a first control position supplies pressure medium from a pressure source into a working space of at least one resilient element mounted between the wheel supports and the vehicle body, and in a second control position, removes pressure medium from the working space, while in a third control position which is in accordance with the level position, blocks the working space, a hydraulic servo-steering device provided with a pressure source, a control valve and a servo-motor whereby a change-over valve with an influencing effect on the levelregulation is activated during operation of the steering device, the improvement comprising said change-over valve being seriesconnected with the level-regulating device so that in a first position in accordance with driving along straight roads, the level-regulating device functions normally while in a second position during driving along curving or winding roads, the effect of the level-regulating device is suspended whereby the switching of the change-over valve from the first into the second position is effected hydraulically via the assistance of the pressure-difference or the pressure-increase which develops within the servo-steering device during driving on curving or winding roads.
Claim 2
Dependent Claim
213 words
A Stabilization device for motor vehicles provided with a hydro-pneumatic suspension system and a level-regulating device which, depending on the distance between wheel supports and a vehicle body, in a first control position supplies pressure medium from a pressure source into a working space of at least one resilient element mounted between the wheel supports and the vehicle body, and in a second control position, removes pressure medium from the working space, while in a third control position which is in accordance with the level position, blocks the working space, a hydraulic servo-steering device provided with a pressure source, a control valve and a servo-motor whereby a change-over valve with an influencing effect on the levelregulation is activated during operation of the steering device, the improvement comprising said change-over valve being seriesconnected with the level-regulating device so that in a first position in accordance with driving along straight roads, the level-regulating device functions normally while in a second position during driving along curving or winding roads, the effect of the level-regulating device is suspended whereby the switching of the change-over valve from the first into the second position is effected hydraulically via the assistance of the pressure-difference or the pressure-increase which develops within the servo-steering device during driving on curving or winding roads.
Claim 3
Dependent Claim
74 words
The stabilization device as claimed in claim 1 including a releasable check valve series-connected to the level-regulating device, in which the change-over valve is located in front of the level-regulating device and a control line branches between the change-over valve and the level-regulating device toward the releasable check valve, whereby the change-over valve in its second position separates the level-regulating device from a pressure source and connects the level-regulating device with a drain line.
Claim 4
Dependent Claim
42 words
The stabilization device as claimed in claim 1 in which the change-over valve is mounted between the level-regulating device and the resilient element, and in its first position has free passage while in its second position blocks at least the spring element.
Claim 5
Dependent Claim
43 words
The stabilization device as claimed in claim 1 in which the change-over valve is installed in a connecting line between working spaces of two resilient elements and in a first position has free passage while in a second position the passage is blocked.
Claim 6
Dependent Claim
45 words
The stabilization device as claimed in claim 4 in which a pipe from a level-regulating valve within the change-over valve in the latter''s first position terminates in the connection pipe between the working spaces of two resilient elements and is blocked in the second position.
Claim 7
Dependent Claim
46 words
The stabilization device as claimed in claim 1 in which the control valve is of open-center type, the pressure-increase in a line between the control valve and a pump for the pressure medium being utilized for switching the change-over valve against the action of a spring.
Claim 8
Dependent Claim
45 words
The stabilization device as claimed in claim 1 in which the control valve is of closed-center type and is provided with steering control, the pressure variation developing during steering in pipes between the control-valve and a cylinder, being utilized for switching of the change-over valve.
Claim 9
Dependent Claim
72 words
The stabilization device as claimed in claim 1 in which the control valve is provided with triangular steering and a differential cylinder, the change-over valve having a control piston, the effective areas of which function similar to the areas of the differential cylinder so that the smaller areas are always loaded by the pressure before the control valve and the larger area is always loaded by the pressure after the control valve.
Claim 10
Dependent Claim
31 words
The stabilization device as claimed in claim 8 in which the pressure medium deriving from the pressure source is diverted either pressureless or substantially pressureless when the change-over valve is interpolated.
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) | 1977-10-14 | 1978-04-15 | 1978-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-14 | 1982-04-15 | 1982-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-14 | 1986-04-15 | 1986-10-15 | $7700.00 | Window Closed / Lapsed |