Patent US5129490A successfully refreshed from Google Patents.
US5129490A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for damping courses of motion between two suspension points
Assignee: Robert Bosch GmbH
•
Filing: 1991-02-21
•
Granted: 1992-07-14
•
Expires: 2011-02-21
Abstract
Abstract A shock absorber in which a damping force is to be adjusted separately for the tension and the compression directions in which the shock absorber is equipped with separate throttle valves, one for basic damping and one for supplementary damping. In the device, the adjustable parts of the two throttle valves are embodied in the form of magnetically controllable coaxial sheaths. This results in an especially space-saving design, the sheaths and magnetic coils which can be integrated directly into a piston (5) of the shock absorber. The device is used for damping relative motions of two masses, in particular in resilient wheel suspension systems in vehicles.
Inventors
- 👤 Walter Kuehle
- 👤 Roland Moennings
- 👤 Udo Neumann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:18
CPC Classifications
F; F16; F16F; F16F9/00; F16F9/32; F16F9/44; F16F9/46; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87265; Y10T137/87378; Y10T137/877; Y10T137/87708; Y10T137/87772
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
237 words
A device for damping courses of motion of two bodies or masses moving relative to one another and at variable speeds in their absolute positions, such as damping wheel suspension systems in vehicles, which comprises a cylinder, a piston displaceable in said cylinder, said piston divides said cylinder into first and second work chambers, said cylinder and the piston are each connected to one of the bodies, at least one valve device included in said piston for varying the flow of a pressure fluid out of one work chamber into the other work chamber, said at least one valve device is optionally triggered by control signals for operation thereof, said at least one valve device includes at least one basic damping throttle valve (115) which performs a basic damping function, at least one supplementary damping throttle valve (116) which performs a supplementary damping function, and a plurality of check valves (101, 102) which permit fluid flow from one work chamber to the other work chamber, wherein all fluid flow connections of the throttle and check valves from the work chambers are at least indirectly joined together with a flow chamber (106), and said throttle valves (115 and 116) are each equipped with one or more displaceable sheaths (66, 67, 68, 69), at least some of said sheaths (66, 67, 68, 69) have different diameters and at least some of said sheaths are displaced partway inside one another.
Claim 2
Independent Claim
237 words
A device for damping courses of motion of two bodies or masses moving relative to one another and at variable speeds in their absolute positions, such as damping wheel suspension systems in vehicles, which comprises a cylinder, a piston displaceable in said cylinder, said piston divides said cylinder into first and second work chambers, said cylinder and the piston are each connected to one of the bodies, at least one valve device included in said piston for varying the flow of a pressure fluid out of one work chamber into the other work chamber, said at least one valve device is optionally triggered by control signals for operation thereof, said at least one valve device includes at least one basic damping throttle valve (115) which performs a basic damping function, at least one supplementary damping throttle valve (116) which performs a supplementary damping function, and a plurality of check valves (101, 102) which permit fluid flow from one work chamber to the other work chamber, wherein all fluid flow connections of the throttle and check valves from the work chambers are at least indirectly joined together with a flow chamber (106), and said throttle valves (115 and 116) are each equipped with one or more displaceable sheaths (66, 67, 68, 69), at least some of said sheaths (66, 67, 68, 69) have different diameters and at least some of said sheaths are displaced partway inside one another.
Claim 3
Dependent Claim
21 words
A device as defined by claim 1, in which said sheaths (66, 67, 68, 69) are disposed coaxially with one another.
Claim 4
Dependent Claim
25 words
A device as defined by claim 2, in which said sheaths (66, 67, 68, 69) are actuabtable by cylindrically embodied magnet coils (44 and 48).
Claim 5
Dependent Claim
25 words
A device as defined by claim 3, in which said magnet coils (44 and 48) are disposed coaxially with the sheaths (66, 67, 68, 69).
Claim 6
Dependent Claim
29 words
A device as defined by claim 4, which includes at least one transverse hole (108) in a wall of at least one of the sheaths (66, 67, 68, 69).
Claim 7
Dependent Claim
34 words
A device as defined by claim 5, in which the wall of at least one sheath in the vicinity of at least one transverse hole (108) tapers off at least partly in blade-like fashion.
Claim 8
Dependent Claim
21 words
A device as defined by claim 1, inw hich said sheaths (66, 67, 68, 69) are disposed in the piston (5).
Claim 9
Dependent Claim
25 words
A device as defined by claim 7, in which said sheaths (66, 67, 68, 69) are actuatable by cylindrically embodied magnet coils (44 and 48).
Claim 10
Dependent Claim
22 words
A device as defined by claim 7, in which said sheaths (66, 67, 68, 69) are disposed coaxially with the piston (5).
Claim 11
Dependent Claim
25 words
A device as defined by claim 9, in which said sheaths (66, 67, 68, 69) are actuatable by cylindrically embodied magnet coils (44 and 48).
Claim 12
Dependent Claim
25 words
A device as defined by claim 1, in which said sheaths (66, 67, 68, 69) are actuatable by cylindrically embodied magnet coils (44 and 48).
Claim 13
Dependent Claim
29 words
A device as defined by claim 1, which includes at least one transverse hole (108) in a wall of at least one of the sheaths (66, 67, 68, 69).
Claim 14
Dependent Claim
34 words
A device as defined by claim 12, in which the wall of at least one sheath in the vicinity of at least one transverse hole (108) tapers off at least partly in blade-like fashion.
Claim 15
Dependent Claim
60 words
A device as defined in claim 1, in which said plurality of check valves (101, 102) include a first check valve (101) and a second check valve (102), said first check valve is subjected to fluid pressure in said first work chamber (11) and said second check valve (102) is subjected to fluid pressure in said second work chamber (12).
Claim 16
Dependent Claim
70 words
A device as defined by claim 1, in which a top plate (31) of said piston includes a first bore (118) and a bottom plate (36) includes a second bore (119) through which fluid can flow between said first and second chambers (11 and 12) in the event said at least one basic damping throttle valve (115) and said at least one supplementary damping throttle valve (116) are stuck closed.
References Cited (Backward Citations)
US3419113A
Cited
US4504039A
Cited
GB2126687A
Cited
US4726453A
Cited
US4936423A
Cited
DE3518327A1
Cited
EP0221602A1
Cited
DE3542097A1
Cited
DE3637714A1
Cited
US4786034A
Cited
US4923038A
Cited
DE3621709A1
Cited
DE3635894A1
Cited
US4893699A
Cited
US4838392A
Cited
US4974707A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-07-14 | 1996-01-13 | 1996-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-07-14 | 2000-01-13 | 2000-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-07-14 | 2004-01-13 | 2004-07-14 | $7700.00 | Window Closed / Lapsed |