Patent US4903323A successfully refreshed from Google Patents.
Patent US3858698A successfully refreshed from Google Patents.
US3858698A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unitary spring for stroking transmission servo motor
Assignee: Motors Liquidation Co
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Filing: 1973-05-16
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Granted: 1975-01-07
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Expires: 1993-05-16
Abstract
Abstract A continuous one-piece wire return spring having a serpentined frusto-conical shape is operatively disposed between each of the hydraulically operated servos and a multi-plate friction device in a transmission. Preferably each spring is made from annealed spring wire stock of circular cross section cut to length. Each part is hooped into a circle and the facing free end portions of the circled part are butt welded together. The circled part is waved into the general configuration of a frustum having a plurality of equally-spaced radia spring arms. The arms have central and inwardly curved contact segments forming the smaller end of the frustum and peripheral outwardly curved contact segments forming the base of the frustum.
Inventors
- 👤 Gilbert K Hause
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:40
CPC Classifications
F; F16; F16H; F16H63/00; F16H63/02; F16H63/30; F16H63/3023; F16H63/3026; B; B60; B60T; B60T1/00; B60T1/02; B60T1/06; B60T1/065; F16D; F16D25/00; F16D25/06; F16D25/062; F16D25/063; F16D25/0635; F16D25/0638; F16F; F16F1/00; F16F1/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
128 words
In a transmission having an input and an output, a gear unit operatively connecting said input to said output, a selectively engageable friction device operatively connected to said gear unit for selectively changing the input/output speed ratio of said transmission, motor means movably mounted in said transmission for effecting the engagement of said friction device, spring means operatively disposed between said motor means and said friction device, said spring means comprising a symmetrical one-piece wire spring of uniform cross section which is waved to have inwardly curved inner contact portions and to have outwardly curved peripheral contact portions and shaped into a serpentined wire frustum so that said inner contact portions form one end of said frustum and said outer contact portion forms a base of said frustum.
Claim 2
Dependent Claim
128 words
In a transmission having an input and an output, a gear unit operatively connecting said input to said output, a selectively engageable friction device operatively connected to said gear unit for selectively changing the input/output speed ratio of said transmission, motor means movably mounted in said transmission for effecting the engagement of said friction device, spring means operatively disposed between said motor means and said friction device, said spring means comprising a symmetrical one-piece wire spring of uniform cross section which is waved to have inwardly curved inner contact portions and to have outwardly curved peripheral contact portions and shaped into a serpentined wire frustum so that said inner contact portions form one end of said frustum and said outer contact portion forms a base of said frustum.
Claim 3
Dependent Claim
157 words
In a transmission having an input and an output, a gear unit operatively connecting said input to said output, a selectively engageable friction device operatively connected to said gear unit for changing the input/output speed ratio of said transmission, piston means mounted for movement in said transmission for effecting the engagement of said friction device, spring means operatively disposed between said motor means and said friction device for moving said motor means in one direction, said spring means comprising a symmetrical and continuous one-piece wire spring of uniform cross section which is circled and waved to have a plurality of radially extendIng spring arms with alternating inner and outer curved contact portions, and said spring means being shaped into a serpentined wire frustum with said inner contact portions forming one end of said frustum and said outer contact portions forming a base offset from said one end and means operatively securing said spring means within said transmission.
Claim 4
Dependent Claim
157 words
In a transmission having an input and an output, a gear unit operatively connecting said input to said output, a selectively engageable friction device operatively connected to said gear unit for changing the input/output speed ratio of said transmission, piston means mounted for movement in said transmission for effecting the engagement of said friction device, spring means operatively disposed between said motor means and said friction device for moving said motor means in one direction, said spring means comprising a symmetrical and continuous one-piece wire spring of uniform cross section which is circled and waved to have a plurality of radially extendIng spring arms with alternating inner and outer curved contact portions, and said spring means being shaped into a serpentined wire frustum with said inner contact portions forming one end of said frustum and said outer contact portions forming a base offset from said one end and means operatively securing said spring means within said transmission.
Claim 5
Dependent Claim
165 words
In a transmission having an input and an output, a gear unit operatively connecting said input to said output, a selectively engageable friction device operatively connected to said gear unit for changing the input/output speed ratio of said transmission, piston means mounted for movement from a retracted position to an apply position within said transmission for directly contacting and engaging said friction device, spring means for moving said motor means to said retracted position, said spring means comprising a symmetrical and continuous one-piece wire spring of uniform cross section which is circled and waved to have a plurality of radially extending spring arms with alternating inner and outer curved contact portions, and said spring means being frusto-conical in shape with said inner contact portions forming one end of said spring means and said outer contact portions forming a base offset from said one end, and means operatively mounting said spring means in said transmission in direct alignment with said piston means and said friction device.
Claim 6
Dependent Claim
165 words
In a transmission having an input and an output, a gear unit operatively connecting said input to said output, a selectively engageable friction device operatively connected to said gear unit for changing the input/output speed ratio of said transmission, piston means mounted for movement from a retracted position to an apply position within said transmission for directly contacting and engaging said friction device, spring means for moving said motor means to said retracted position, said spring means comprising a symmetrical and continuous one-piece wire spring of uniform cross section which is circled and waved to have a plurality of radially extending spring arms with alternating inner and outer curved contact portions, and said spring means being frusto-conical in shape with said inner contact portions forming one end of said spring means and said outer contact portions forming a base offset from said one end, and means operatively mounting said spring means in said transmission in direct alignment with said piston means and said friction device.
References Cited (Backward Citations)
US2725964A
Cited
US3237739A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-06 | 1978-07-08 | 1979-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-06 | 1982-07-08 | 1983-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-06 | 1986-07-08 | 1987-01-07 | $7700.00 | Window Closed / Lapsed |