Patent US4890937A successfully refreshed from Google Patents.
US4890937A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spring-loaded bearing
Assignee: Bal Seal Engineering LLC
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Filing: 1988-09-14
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Granted: 1990-01-02
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Expires: 2008-09-14
Abstract
Abstract A cartridge bearing assembly includes a non-resilient tubular bearing element and a spring for causing the tubular bearing element to float with a shaft therethrough within a surrounding housing. Because loading between the bearing element and the shaft is eliminated, very close tolerances can be held therebetween and wear between the bearing and the shaft therethrough is substantially reduced. Seals may be incorporated into the bearing member in applications where a pressure drop is desired across the bearing shaft interface.
Inventors
- 👤 Peter J. Balsells
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:31
CPC Classifications
F; F16; F16C; F16C27/00; F16C27/02
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
111 words
A cartridge bearing assembly for reciprocating shafts comprising: a non-resilient tubular bearing element having means defining an inside dynamic surface for engaging a reciprocating shaft; spring means for engaging an outside static surface of the tubular bearing element for causing the tubular bearing element and shaft to float within a surrounding housing, said tubular bearing element remaining stationary with regard to shaft reciprocal movement but moving with the shaft in any off-axial movement; first seal means for proving a seal between the tubular bearing element inside dynamic surface and said shaft, and second seal means for providing a seal between the tubular bearing element outside static surface and the surrounding housing.
Claim 2
Dependent Claim
111 words
A cartridge bearing assembly for reciprocating shafts comprising: a non-resilient tubular bearing element having means defining an inside dynamic surface for engaging a reciprocating shaft; spring means for engaging an outside static surface of the tubular bearing element for causing the tubular bearing element and shaft to float within a surrounding housing, said tubular bearing element remaining stationary with regard to shaft reciprocal movement but moving with the shaft in any off-axial movement; first seal means for proving a seal between the tubular bearing element inside dynamic surface and said shaft, and second seal means for providing a seal between the tubular bearing element outside static surface and the surrounding housing.
Claim 3
Dependent Claim
50 words
The cartridge bearing assembly according to claim 1 wherein the spring means comprises an annular radially resilient canted coil spring having a generally flat radial force-deflection characteristic in the deflection range defined by the difference in radius of the tubular bearing element outside static surface and a housing inside surface.
Claim 4
Dependent Claim
49 words
The cartridge bearing assembly according to claim 2 further comprising conduit means passing through said tubular bearing element along a radius thereof for introducing a lubricant between the shaft and tubular bearing element inside dynamic surface and between the housing inside surface and tubular bearing element outside static surface.
Claim 5
Dependent Claim
22 words
The cartridge bearing assembly according to claim 3 further comprising means for preventing spring overload by off axial movement of said shaft.
Claim 6
Dependent Claim
44 words
The cartridge bearing assembly according to claim 4 wherein said means for preventing spring overload comprises means defining a groove in the tubular bearing element outside dynamic surface having adjacent portions for limiting the compression of the spring to the depth of the groove.
Claim 7
Dependent Claim
106 words
A cartridge bearing assembly for reciprocating shafts comprising: a non-resilient tubular bearing element having inside surface means for bearing against a movable shaft inserted therethrough: spring means for centering the tubular bearing element within a housing and for absorbing shaft side loading, said spring being disposed between said tubular bearing element and an inside surface of said housing; tubular bearing element outside surface means for preventing spring overload; first seal means for providing a seal between the tubular bearing element inside surface means and said shaft; second seal means for providing a seal between the tubular bearing element outside surface means and the housing inside surface.
Claim 8
Dependent Claim
106 words
A cartridge bearing assembly for reciprocating shafts comprising: a non-resilient tubular bearing element having inside surface means for bearing against a movable shaft inserted therethrough: spring means for centering the tubular bearing element within a housing and for absorbing shaft side loading, said spring being disposed between said tubular bearing element and an inside surface of said housing; tubular bearing element outside surface means for preventing spring overload; first seal means for providing a seal between the tubular bearing element inside surface means and said shaft; second seal means for providing a seal between the tubular bearing element outside surface means and the housing inside surface.
Claim 9
Dependent Claim
49 words
The cartridge bearing assembly according to claim 6 wherein the spring means comprises an annular radially resilient canted coil spring having a generally flat radial force-deflection characteristic in the deflection range defined by the difference in radius of the tubular bearing element outside surface and the housing inside surface.
Claim 10
Dependent Claim
47 words
The cartridge bearing assembly according to claim 7 further comprising conduit means passing through said tubular bearing element along a radius thereof for introducing a lubricant between the shaft and tubular being element inside surface and between the housing inside surface and tubular bearing element outside surface.
Claim 11
Dependent Claim
43 words
The cartridge bearing assembly according to claim 8 wherein the means for preventing spring overload comprises means defining a groove in the tubular bearing element outside surface having adjacent portion for limiting the compressing of the spring to the depth of the groove.
Claim 12
Dependent Claim
102 words
A cartridge bearing assembly for reciprocating shafts comprising: a non-resilient tubular bearing element having means defining an inside dynamic surface for engaging a rotatable and/or reciprocal shaft; spring means for absorbing shaft loading said shaft loading being transmitted through said tubular bearing element, said spring means being disposed between an outside static surface of the tubular bearing element and a surrounding housing. first seal means for providing a seal between the tubular bearing element inside dynamic surface and said shaft; and second seal means for providing a seal between the tubular bearing element outside static surface and an inside surface of housing.
Claim 13
Dependent Claim
102 words
A cartridge bearing assembly for reciprocating shafts comprising: a non-resilient tubular bearing element having means defining an inside dynamic surface for engaging a rotatable and/or reciprocal shaft; spring means for absorbing shaft loading said shaft loading being transmitted through said tubular bearing element, said spring means being disposed between an outside static surface of the tubular bearing element and a surrounding housing. first seal means for providing a seal between the tubular bearing element inside dynamic surface and said shaft; and second seal means for providing a seal between the tubular bearing element outside static surface and an inside surface of housing.
Claim 14
Dependent Claim
50 words
The cartridge bearing assembly according to claim 10 wherein the spring means comprises an annular radially resilient canted coil spring having a generally flat radial force-deflection characteristic in the deflection range defined by the difference in radius of the tubular bearing element outside static surface and a housing inside surface.
Claim 15
Dependent Claim
49 words
The cartridge bearing assembly according to claim 11 further comprising conduit means passing through said tubular bearing element along a radius thereof for introducing a lubricant between the shaft and tubular bearing element inside dynamic surface and between the housing inside surface and tubular bearing element outside static surface.
Claim 16
Dependent Claim
22 words
The cartridge bearing assembly according to claim 12 further comprising means for preventing spring overload by off axial movement of said shaft.
Claim 17
Dependent Claim
44 words
The cartridge bearing assembly according to claim 13 wherein said means for preventing spring overload comprises means defining a groove in the tubular bearing element outside dynamic surface having adjacent portions for limiting the compressing of the spring to the depth of the groove.
References Cited (Backward Citations)
US2531079A
Cited
US2707135A
Cited
US2964339A
Cited
US3047299A
Cited
US3266855A
Cited
FR1305706A
Cited
US3485538A
Cited
US3592517A
Cited
US3665816A
Cited
US3727923A
Cited
US4406463A
Cited
US4630636A
Cited
US4655462A
Cited
DD249510A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-01-01 | 1993-07-03 | 1994-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-01-01 | 1997-07-03 | 1998-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-01-01 | 2001-07-03 | 2002-01-02 | $7700.00 | Window Closed / Lapsed |