Patent US4283087A successfully refreshed from Google Patents.
US4283087A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Support unit for a driver's cab in a utility vehicle
Assignee: Fritzmeier AG
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Filing: 1979-12-12
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Granted: 1981-08-11
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Expires: 1999-12-12
Abstract
Abstract The invention provides a support unit for drivers' cabs which actively compensates for any relative movement between chassis and cab by providing at least one support cylinder which is axially rigidly mounted on the chassis with its support piston and flexibly supported on the cab by its cylinder, the cylinder forming a movement-producing unit with a directional control valve whose body alternately connects the front side of the support piston to the pressure side of a constant-pressure circuit or to a non-pressurized outlet and is attached to the cab.
Inventors
- 👤 Wolfgang Kauss
- 👤 Ludwig Muncke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:50
CPC Classifications
B; B62; B62D; B62D33/00; B62D33/06; B62D33/0604; B62D33/0608; Y; Y10; Y10S; Y10S280/00; Y10S280/01
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
144 words
An apparatus for compensating relative dynamic movement of the passenger space of a vehicle comprising; at least one support means mounted to the chassis of the vehicle, the support means having a piston supported by the passenger space by flexible means; a fluid circuit providing a source of pressure or a non-pressurized return; a directional control means for connecting the pressure side of the piston to either the source of pressure or to the non-pressurized return; a lever means supported by the passenger space, the lever means having a first arm means for actuating the directional control means and a second arm means; and an adjusting cylinder means having a piston connected to the second arm means, the pressure side of the adjusting cylinder piston being in fluid connection with the pressure side of the support means piston by an adjustable fluid throttling means.
Claim 2
Independent Claim
144 words
An apparatus for compensating relative dynamic movement of the passenger space of a vehicle comprising; at least one support means mounted to the chassis of the vehicle, the support means having a piston supported by the passenger space by flexible means; a fluid circuit providing a source of pressure or a non-pressurized return; a directional control means for connecting the pressure side of the piston to either the source of pressure or to the non-pressurized return; a lever means supported by the passenger space, the lever means having a first arm means for actuating the directional control means and a second arm means; and an adjusting cylinder means having a piston connected to the second arm means, the pressure side of the adjusting cylinder piston being in fluid connection with the pressure side of the support means piston by an adjustable fluid throttling means.
Claim 3
Dependent Claim
14 words
The apparatus according to claim 1 wherein the fluid circuit provides a constant pressure.
Claim 4
Dependent Claim
14 words
The apparatus according to claim 1 wherein the fluid circuit includes a fluid accumulator.
Claim 5
Dependent Claim
27 words
The apparatus according to claim 1 wherein the directional control means includes a slide valve which is responsive to the relative dynamic movement of the passenger space.
Claim 6
Dependent Claim
24 words
The apparatus according to claim 4 wherein upon compression of the flexible means the slide valve connects the fluid circuit to the non-pressurized return.
Claim 7
Dependent Claim
25 words
The apparatus according to claim 4 wherein upon extension of the flexible means the slide valve connects the fluid circuit to the source of pressure.
Claim 8
Dependent Claim
17 words
An apparatus according to claim 1 wherein the directional control means is affixed to the support means.
Claim 9
Dependent Claim
17 words
The apparatus according to claim 1 wherein the directional control means is affixed to the passenger space.
Claim 10
Dependent Claim
41 words
The apparatus according to claim 1 wherein there are at least two support means, at least one support means located at the front of the passenger space and at least one support means located at the rear of the passenger space.
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) | 1984-08-10 | 1985-02-09 | 1985-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-10 | 1989-02-09 | 1989-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-10 | 1993-02-09 | 1993-08-11 | $7700.00 | Window Closed / Lapsed |