Patent US4781362A successfully refreshed from Google Patents.
US4781362A
Expired / Lapsed
US
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Hydraulically damping elastic bearing
Assignee: ZF Friedrichshafen AG
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Filing: 1987-07-17
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Granted: 1988-11-01
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Expires: 2007-07-17
Abstract
Abstract Hydraulically damping elastic bearing with two rigid end walls opposite one another in the axial direction, and at least two chambers located one behind the other and containing damping fluid, at least one of which has a circumferential wall designed as an elastic spring element, whereby the chambers are separated from one another by a partition which is at least partly elastic exhibiting slits for an exchange of fluids. The elastic partition should thereby be designed so that when there is flow against the membrane from different chambers at the same pressure, a different pressure reduction is possible. For this purpose, the elastic partition is asymmetrical in cross section in relation to its center line, at least in the area of the slits, so that the opposite surfaces of the elastic partition are at different distances from the center plane in the area of a slit.
Inventors
- 👤 Horst Reuter
- 👤 Jorn-Rainer Quast
- 👤 Heinz Brenner
- 👤 Peter Maier
- 👤 Heinrich Meyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:58
CPC Classifications
F; F16; F16F; F16F13/00; F16F13/04; F16F13/06; F16F13/08; F16F13/10; F16F13/105; F16F13/106
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
121 words
A hydraulically damping elastic bearing for providing an axial damping action, comprising: a housing; a partition being at least partially elastic and being mounted within said housing so as to divide the interior of said housing into first and second chambers, and at least one slit provided in said partition; said partition comprising: an outer annular substantially rigid partition member; and a central elastic partition member provided with said slit; said central elastic partition member being asymmetrical in cross section, at least in the area of said slit, with respect to its central plane such that the opposing surfaces of said central elastic partition member are disposed at substantially unequal distances from said central plane in the area of said slit.
Claim 2
Dependent Claim
121 words
A hydraulically damping elastic bearing for providing an axial damping action, comprising: a housing; a partition being at least partially elastic and being mounted within said housing so as to divide the interior of said housing into first and second chambers, and at least one slit provided in said partition; said partition comprising: an outer annular substantially rigid partition member; and a central elastic partition member provided with said slit; said central elastic partition member being asymmetrical in cross section, at least in the area of said slit, with respect to its central plane such that the opposing surfaces of said central elastic partition member are disposed at substantially unequal distances from said central plane in the area of said slit.
Claim 3
Dependent Claim
26 words
The bearing according to claim 1, wherein said partition further comprises a flexible membrane attached to the outer periphery of said outer annular rigid partition member.
Claim 4
Dependent Claim
20 words
The bearing according to claim 2, further comprising resonance tuned damping means for damping a resonance produced by a motor.
Claim 5
Dependent Claim
32 words
The bearing according to claim 3, wherein said resonance tuned damping means comprises an annular passage formed in said outer annular substantially rigid partition member and interconnecting said first and second chambers.
Claim 6
Dependent Claim
34 words
The bearing according to claim 2, wherein said slit is provided with an opening having an inclined surface, said inclined surface being inclined with respect to one of said opposing surfaces of said partition.
Claim 7
Dependent Claim
54 words
The bearing according to claim 2, wherein said opposing surfaces of said central elastic partition member are disposed substantially parallel to one another and wherein at least one of said opposing surfaces is chosen from a configuration, chosen from the group consisting essentially of inclined, concave or convex, in the area of said slit.
Claim 8
Dependent Claim
41 words
The bearing according to claim 2, wherein at least one of said opposing surfaces of said central elastic partition member is chosen from a configuration, chosen from the group consisting essentially of spherical, concave or convex over substantially its entire area.
Claim 9
Dependent Claim
20 words
The bearing according to claim 1, further comprising resonance tuned damping means for damping a resonance produced by a motor.
Claim 10
Dependent Claim
27 words
The bearing according to claim 8, wherein said resonance tuned damping means comprises an annular passage formed in said partition and interconnecting said first and second chambers.
Claim 11
Dependent Claim
20 words
The bearing according to claim 1, further comprising resonance tuned damping means for damping a resonance produced by a motor.
Claim 12
Dependent Claim
32 words
The bearing according to claim 10, wherein said resonance tuned damping means comprises an annular passage formed in said outer annular substantially rigid partition member and interconnecting said first and second chambers.
Claim 13
Dependent Claim
34 words
The bearing according to claim 1, wherein said slit is provided with an opening having an inclined surface, said inclined surface being inclined with respect to one of said opposing surfaces of said partition.
Claim 14
Dependent Claim
34 words
The bearing according to claim 1, wherein said slit is provided with an opening having an inclined surface, said inclined surface being inclined with respect to one of said opposing surfaces of said partition.
Claim 15
Dependent Claim
51 words
The bearing according to claim 1, wherein said opposing surfaces of said partition are disposed substantially parallel to one another and wherein at least one of said opposing surfaces is chosen from a configuration, chosen from the group consisting essentially of inclined, concave or convex, in the area of said slit.
Claim 16
Dependent Claim
54 words
The bearing according to claim 1, wherein said opposing surfaces of said central elastic partition member are disposed substantially parallel to one another and wherein at least one of said opposing surfaces is chosen from a configuration, chosen from the group consisting essentially of inclines, concave or convex, in the area of said slit.
Claim 17
Dependent Claim
41 words
The bearing according to claim 1, wherein at least one of said opposing surfaces of said central elastic partition member is chosen from a configuration, chosen from the group consisting essentially of spherical, concave or convex over substantially its entire area.
Claim 18
Dependent Claim
159 words
A hydraulically damping elastic bearing for providing an axial damping action, said bearing comprising: a housing; a partition mounted within said housing so as to divide the interior of said housing into first and second chambers, said partition being at least partially elastic and comprising: an outer annular elastic membrane; an inner annular substantially rigid partition member, said inner annular substantially rigid partition member being provided with an annular passage formed therein and interconnecting said first and second chambers; and a central elastic partition member provided with at least one slit, said central elastic partition member being asymmetrical in cross section, at least in the area of said slit, with respect to its central plane such that the opposing surfaces of said central elastic partition member are disposed at substantially unequal distances from said central plane in the area of said slit; at least one of said first and second chambers being provided with a circumferential elastic spring member.
Claim 19
Dependent Claim
159 words
A hydraulically damping elastic bearing for providing an axial damping action, said bearing comprising: a housing; a partition mounted within said housing so as to divide the interior of said housing into first and second chambers, said partition being at least partially elastic and comprising: an outer annular elastic membrane; an inner annular substantially rigid partition member, said inner annular substantially rigid partition member being provided with an annular passage formed therein and interconnecting said first and second chambers; and a central elastic partition member provided with at least one slit, said central elastic partition member being asymmetrical in cross section, at least in the area of said slit, with respect to its central plane such that the opposing surfaces of said central elastic partition member are disposed at substantially unequal distances from said central plane in the area of said slit; at least one of said first and second chambers being provided with a circumferential elastic spring member.
Claim 20
Dependent Claim
155 words
A hydraulically damping elastic bearing for providing an axial damping action, said bearing comprising: a housing: a partition mounted within said housing so as to divide the interior of said housing into first and second chambers, said partition being at least partially elastic, said partition comprising: an outer annular substantially rigid partition member, said outer annular substantially rigid partition member being provided with an annular passage formed therein and interconnecting said first and second chambers: and a central elastic partition member provided with at least one slit, said central elastic partition member being asymmetrical in cross section, at least in the area of said slit, with respect to its central plane such that the opposing surfaces of said central elastic partition member are disposed in substantially unequal distances from said central plane in the area of said slit; at least one of said first and second chambers being provided with a circumferential elastic spring member.
Claim 21
Dependent Claim
155 words
A hydraulically damping elastic bearing for providing an axial damping action, said bearing comprising: a housing: a partition mounted within said housing so as to divide the interior of said housing into first and second chambers, said partition being at least partially elastic, said partition comprising: an outer annular substantially rigid partition member, said outer annular substantially rigid partition member being provided with an annular passage formed therein and interconnecting said first and second chambers: and a central elastic partition member provided with at least one slit, said central elastic partition member being asymmetrical in cross section, at least in the area of said slit, with respect to its central plane such that the opposing surfaces of said central elastic partition member are disposed in substantially unequal distances from said central plane in the area of said slit; at least one of said first and second chambers being provided with a circumferential elastic spring member.
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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) | 1991-11-01 | 1992-05-02 | 1992-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-11-01 | 1996-05-02 | 1996-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-11-01 | 2000-05-02 | 2000-11-01 | $7700.00 | Window Closed / Lapsed |