Patent US5346192A successfully refreshed from Google Patents.
US5346192A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic bearing with electromagnetically compensated chambers
Assignee: Carl Freudenberg KG
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Filing: 1993-02-08
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Granted: 1994-09-13
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Expires: 2013-02-08
Abstract
Abstract A rubber bearing, in which a liquid-filled working chamber is bounded by an expanding member and by a compensating wall that is capable of moving back and forth in the direction of the working chamber, wherein the compensating wall consists at least partially of a material that is capable of being moved by magnetic forces and extends relatively movably with one partial area into an air gap between a pair of coils comprised of two mutually opposing magnetic coils, which are rigidly supported in two coil braces and are capable of receiving an electric alternating current. The magnetic fluxes of the magnetic coils in the air gap are superimposed upon the magnetic flux of at least one permanent magnet, and the magnetic coils synchronously receive an electric current in such a way that the magnetic flux generated by the permanent magnet is strengthened on one side of the compensating wall and weakened on the other side of the compensating wall.
Inventors
- 👤 Uwe Weltin
- 👤 Ulrich Freudenberg
- 👤 Tillman Freudenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:21
CPC Classifications
F; F16; F16F; F16F13/00; F16F13/04; F16F13/26; F16F13/264
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
155 words
A rubber bearing comprising: a liquid-filled working chamber bounded by a compensating wall comprised at least partially of a material that is capable of being moved by magnetic forces and capable of moving back and forth in the direction of said working chamber; a first magnetic coil and a second magnetic coil, each of which is capable of receiving an electric alternating current, wherein the first magnetic coil is oriented to generate a first alternating magnetic flux and the second magnetic coil is oriented to generate a second alternating magnetic flux; and a permanent magnet arrangement, comprising at least one permanent magnet, generating a permanent magnet magnetic flux, whereby said permanent magnet arrangement is oriented so that the first alternating magnetic flux strengthens the permanent magnet magnetic flux on one side of said compensating wall and the second alternating magnetic flux weakens the permanent magnet magnetic flux on an opposite side of said compensating wall.
Claim 2
Dependent Claim
155 words
A rubber bearing comprising: a liquid-filled working chamber bounded by a compensating wall comprised at least partially of a material that is capable of being moved by magnetic forces and capable of moving back and forth in the direction of said working chamber; a first magnetic coil and a second magnetic coil, each of which is capable of receiving an electric alternating current, wherein the first magnetic coil is oriented to generate a first alternating magnetic flux and the second magnetic coil is oriented to generate a second alternating magnetic flux; and a permanent magnet arrangement, comprising at least one permanent magnet, generating a permanent magnet magnetic flux, whereby said permanent magnet arrangement is oriented so that the first alternating magnetic flux strengthens the permanent magnet magnetic flux on one side of said compensating wall and the second alternating magnetic flux weakens the permanent magnet magnetic flux on an opposite side of said compensating wall.
Claim 3
Dependent Claim
20 words
The rubber bearing according to claim 1, wherein said liquid-filled working chamber is also bounded by a resilient expanding member.
Claim 4
Dependent Claim
23 words
The rubber bearing according to claim 2, wherein each of said first and second magnetic coils is rigidly supported in a coil brace.
Claim 5
Dependent Claim
25 words
The rubber bearing according to claim 3, wherein said permanent magnet arrangement comprises at least one partial magnet which is embedded in said compensating wall.
Claim 6
Dependent Claim
37 words
The rubber bearing according to claim 3, wherein said permanent magnet arrangement is comprised of two partial magnets each of which is combined with one of said first and second magnetic coils to make up a unit.
Claim 7
Dependent Claim
25 words
The rubber bearing according to claim 2, wherein said permanent magnet arrangement comprises at least one partial magnet which is embedded in said compensating wall.
Claim 8
Dependent Claim
37 words
The rubber bearing according to claim 2, wherein said permanent magnet arrangement is comprised of two partial magnets each of which is combined with one of said first and second magnetic coils to make up a unit.
Claim 9
Dependent Claim
26 words
The rubber bearing according to claim 7, wherein each of said units further comprises a coil brace for supporting said partial magnet and said magnetic coil.
Claim 10
Dependent Claim
18 words
The rubber bearing according to claim 8, wherein each of said coil braces comprises a magnetically attracted part.
Claim 11
Dependent Claim
27 words
The rubber bearing according to claim 7, wherein each of said partial magnets has a curved shape and supports one of said first and second magnetic coils.
Claim 12
Dependent Claim
29 words
The rubber bearing according to claim 2, wherein said compensating wall further comprises an annual partial area around its periphery which extends between said first and second magnetic coils.
Claim 13
Dependent Claim
23 words
The rubber bearing according to claim 1, wherein each of said first and second magnetic coils is rigidly supported in a coil brace.
Claim 14
Dependent Claim
25 words
The rubber bearing according to claim 12, wherein said permanent magnet arrangement comprises at least one partial magnet which is embedded in said compensating wall.
Claim 15
Dependent Claim
37 words
The rubber bearing according to claim 12, wherein said permanent magnet arrangement is comprised of two partial magnets each of which is combined with one of said first and second magnetic coils to make up a unit.
Claim 16
Dependent Claim
25 words
The rubber bearing according to claim 1, wherein said permanent magnet arrangement comprises at least one partial magnet which is embedded in said compensating wall.
Claim 17
Dependent Claim
37 words
The rubber bearing according to claim 1, wherein said permanent magnet arrangement is comprised of two partial magnets each of which is combined with one of said first and second magnetic coils to make up a unit.
Claim 18
Dependent Claim
26 words
The rubber bearing according to claim 16, wherein each of said units further comprises a coil brace for supporting said partial magnet and said magnetic coil.
Claim 19
Dependent Claim
18 words
The rubber bearing according to claim 17, wherein each of said coil braces comprises a magnetically attracted part.
Claim 20
Dependent Claim
27 words
The rubber bearing according to claim 16, wherein each of said partial magnets has a curved shape and supports one of said first and second magnetic coils.
Claim 21
Dependent Claim
29 words
The rubber bearing according to claim 1, wherein said compensating wall further comprises an annual partial area around its periphery which extends between said first and second magnetic coils.
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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) | 1997-09-12 | 1998-03-14 | 1998-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-09-12 | 2002-03-14 | 2002-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-09-12 | 2006-03-14 | 2006-09-13 | $7700.00 | Window Closed / Lapsed |