Patent US4645188A successfully refreshed from Google Patents.
US4645188A
Expired / Lapsed
US
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Resilient bearing with a hydraulic damper
Assignee: ZF Lemfoerder GmbH
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Filing: 1984-12-26
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Granted: 1987-02-24
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Expires: 2004-12-26
Abstract
Abstract A resilient bearing includes a cushioning member comprising an inner part, an annular element of a resilient material, and an outer part or shell, and a hydraulic damper having an inner space filled with a liquid and being divided by a partition into a working space and an equalizing space. The partition is provided with throttling passages for the liquid flowing therethrough, and the volumes of the separated spaces are variable. The hydraulic damper is accommodated in a housing which is independent of the cushioning member, and comprises a piston which is movable up and down in the working space, thereby varying the volume of the space, and is connected, directly or indirectly, to the inner part of the cushioning member.
Inventors
- 👤 Ernst-Gunter Jordens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:55
CPC Classifications
F; F16; F16F; F16F13/00; F16F13/04; F16F13/06
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
202 words
A resilient bearing and hydraulic damper combination comprising, an annular cushion assembly of an outer annular rigid shell, a rigid inner part having a central bore therethrough and an annular intermediate central part of resilient material arranged between and bonded to said inner and outer parts, a hydraulic damper part having a damper housing with an upstanding part engaged within said outer part of said annular cushion assembly and having a top opening aligned with the bore of said rigid inner part and having an interior fluid working space with liquid therein, a piston member having a rod portion extending through the bore of said rigid inner part and adjustably engaged therewith and extending through the opening of said damper housing and having a piston portion at its lower end disposed in said working space, a partition wall extending across said working space and dividing it into an upper hydraulic damper space above said wall and a lower equalizing space below said wall, and a flow throttle in said partition wall permitting controlled flow from said upper working space and said lower equalizing space and a flexible case covering said piston portion and isolating said piston portion relative to said damper housing.
Claim 2
Dependent Claim
202 words
A resilient bearing and hydraulic damper combination comprising, an annular cushion assembly of an outer annular rigid shell, a rigid inner part having a central bore therethrough and an annular intermediate central part of resilient material arranged between and bonded to said inner and outer parts, a hydraulic damper part having a damper housing with an upstanding part engaged within said outer part of said annular cushion assembly and having a top opening aligned with the bore of said rigid inner part and having an interior fluid working space with liquid therein, a piston member having a rod portion extending through the bore of said rigid inner part and adjustably engaged therewith and extending through the opening of said damper housing and having a piston portion at its lower end disposed in said working space, a partition wall extending across said working space and dividing it into an upper hydraulic damper space above said wall and a lower equalizing space below said wall, and a flow throttle in said partition wall permitting controlled flow from said upper working space and said lower equalizing space and a flexible case covering said piston portion and isolating said piston portion relative to said damper housing.
Claim 3
Dependent Claim
43 words
A resilient bearing and hydraulic damper combination according to claim 1, wherein said outer shell part of said cushion assembly includes an annular portion extending below said intermediate central part and engaged over a side of said damper housing and firmly connected thereto.
Claim 4
Dependent Claim
31 words
A resilient bearing and hydraulic damper combination according to claim 1, including means carried by said piston engaged with said inner part preventing rotation relative to said outer and inner part.
Claim 5
Dependent Claim
51 words
A resilient bearing and hydraulic damper combination according to claim 3, wherein said means connected to said piston rod comprises a collar around said piston rod having a rotationally symmetrical shape, said rigid inner part of said cushion assembly having a bottom face with a recess into which said collar extends.
Claim 6
Dependent Claim
40 words
A resilient bearing and hydraulic damper combination according to claim 4, wherein the recess of said inner part is bounded by a shoulder at its upper end limiting the upper motion of said piston rod relative to said inner part.
Claim 7
Dependent Claim
53 words
A resilient bearing and hydraulic damper combination according to claim 1, wherein said resilient intermediate part of said cushion assembly includes a downwardly extending portion forming a stop limiting the downward movement of the cushion assembly relative to the damper housing and the upper motion of the piston relative to the damper housing.
Claim 8
Dependent Claim
28 words
A resilient bearing and hydraulic damper combination according to claim 6, wherein said cushion assembly is constructed with unequally stiff resiliences in the vertical longitudinal and transverse directions.
Claim 9
Dependent Claim
19 words
A resilient bearing and hydraulic damper combination according to claim 1, wherein said piston rod comprises a safety bolt.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-02-23 | 1990-08-25 | 1991-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-23 | 1994-08-25 | 1995-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-23 | 1998-08-25 | 1999-02-24 | $7700.00 | Window Closed / Lapsed |