Patent US3765519A successfully refreshed from Google Patents.
US3765519A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piston and retraction spring subassembly
Assignee: Motors Liquidation Co
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Filing: 1972-01-13
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Granted: 1973-10-16
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Expires: 1992-01-13
Abstract
Abstract The transmission illustrated includes a central support or web member having annular chambers formed in both end faces thereof, with an annular piston mounted in each chamber and a spring retainer plate mounted adjacent the outer edge of each chamber. Once assembled, the spring retainer plate is self-locking in that a conically shaped outer surface formed on a plurality of tabs located around the outer periphery of each of the spring retainers is urged into contact with respective oppositely disposed conical recesses formed just inside the web end faces by a spring which also urges the piston away from the retainer plate and into the chamber. The retainer plate is mounted in place by first inserting one or more of its ear portions within the conical recess and then bowing the retainer plate to insert the remaining ear portions therein. A cylindrical extension formed on the annular piston extends through the central opening of the retainer plate to selectively engage the adjacent clutch or brake plates.
Inventors
- 👤 N Kell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:31
CPC Classifications
F; F16; F16H; F16H57/00; F16H57/08; F16H57/10
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
287 words
For use in a transmission housing including a first and second brake means each operative to brake an element to establish ratio drives, a fluid actuator assembly adaptable to being preassembled and comprising a support member, an annular chamber formed adjacent each end face of said support member, a spring retainer ring mounted in each of said annular chambers, a first conical surface formed on the entire outer peripheral surface of each of a plurality of spaced ear portions formed on each of said spring retainer rings and a second conical surface formed on the entire surface of each of said annular chambers adjacent each of said respective end faces, said spring retainer ring being adaptable to being bowed for initial insertion into said annular chamber, annular piston means slidably mounted in each of said annular chambers, spring means mounted between said piston means and each of said spring retainer rings for urging said first conical surfaces of said ear portions of said spring retainer rings into engagement with said second conical surface in each of said annular chambers after being preassembled, and first and second extension means formed on each of said piston means and extending respectively past the inner periphery of each of said spring retainer rings and past the outer periphery thereof intermediate said spaced ear portions for selectively engaging each of said respective first and second brake means, and first and second snap rings mounted in said transmission housing adjacent said end faces of said support member of said fluid actuator assembly and in contact with said respective spring retainer rings for relieving the engagement of said first and second conical surfaces and providing full annular axial support for said spring retainer rings.
Claim 2
Dependent Claim
287 words
For use in a transmission housing including a first and second brake means each operative to brake an element to establish ratio drives, a fluid actuator assembly adaptable to being preassembled and comprising a support member, an annular chamber formed adjacent each end face of said support member, a spring retainer ring mounted in each of said annular chambers, a first conical surface formed on the entire outer peripheral surface of each of a plurality of spaced ear portions formed on each of said spring retainer rings and a second conical surface formed on the entire surface of each of said annular chambers adjacent each of said respective end faces, said spring retainer ring being adaptable to being bowed for initial insertion into said annular chamber, annular piston means slidably mounted in each of said annular chambers, spring means mounted between said piston means and each of said spring retainer rings for urging said first conical surfaces of said ear portions of said spring retainer rings into engagement with said second conical surface in each of said annular chambers after being preassembled, and first and second extension means formed on each of said piston means and extending respectively past the inner periphery of each of said spring retainer rings and past the outer periphery thereof intermediate said spaced ear portions for selectively engaging each of said respective first and second brake means, and first and second snap rings mounted in said transmission housing adjacent said end faces of said support member of said fluid actuator assembly and in contact with said respective spring retainer rings for relieving the engagement of said first and second conical surfaces and providing full annular axial support for said spring retainer rings.
Claim 3
Dependent Claim
224 words
A fluid actuator device comprising a web member; an annular chamber formed in a face of said web member; movable actuator means slidably mounted in said annular chamber and having a fluid-confining face facing in one axial direction, a spring seat facing in the opposite direction and an actuator portion formed radially inwardly of said spring seat and extending therefrom in said opposite direction; a conically shaped recess formed in said annular chamber and having the smallest diameter end thereof located at the plane of said face of said web member; a spring retainer ring having a plurality of spaced arcuate tabs formed at equal circumferential intervals on the outer periphery thereof and adapted to be flexed in order to be positioned within said conically shaped recess radially outwardly of said actuator portion, each of said arcuate tabs having an oppositely disposed conically shaped surface formed on the entire outer periphery thereof matching sAid conically shaped recess; and a spring positioned between said spring seat and said spring retainer ring for simultaneously urging said arcuate tabs into mating engaging contact with said conically shaped recess and said movable actuator means away from said spring retainer ring and toward the bottom of said annular chamber, cooperation between said tabs and recess forming the sole retention means for said spring retainer ring in said annular chamber.
Claim 4
Dependent Claim
224 words
A fluid actuator device comprising a web member; an annular chamber formed in a face of said web member; movable actuator means slidably mounted in said annular chamber and having a fluid-confining face facing in one axial direction, a spring seat facing in the opposite direction and an actuator portion formed radially inwardly of said spring seat and extending therefrom in said opposite direction; a conically shaped recess formed in said annular chamber and having the smallest diameter end thereof located at the plane of said face of said web member; a spring retainer ring having a plurality of spaced arcuate tabs formed at equal circumferential intervals on the outer periphery thereof and adapted to be flexed in order to be positioned within said conically shaped recess radially outwardly of said actuator portion, each of said arcuate tabs having an oppositely disposed conically shaped surface formed on the entire outer periphery thereof matching sAid conically shaped recess; and a spring positioned between said spring seat and said spring retainer ring for simultaneously urging said arcuate tabs into mating engaging contact with said conically shaped recess and said movable actuator means away from said spring retainer ring and toward the bottom of said annular chamber, cooperation between said tabs and recess forming the sole retention means for said spring retainer ring in said annular chamber.
Claim 5
Dependent Claim
199 words
For use in a transmission housing including friction discs alternately engageable and disengageable to establish ratio drives, a fluid actuator assembly comprising a support member, an annular chamber formed in an end face of said support member, a spring retainer ring mounted in said annular chamber adjacent said end face, a plurality of arcuate tabs formed on the outer periphery of said spring retainer ring, a conical surface formed on the entire outer peripheral surface of each of said arcuate tabs and an oppositely disposed matching conical surface formed in said annular chamber adjacent said end face, said conical surface of said annular chamber having its smallest diameter position located at said end face, annular piston means slidably mounted in said annular chamber, spring means mounted between said piston means and said spring retainer ring for urging said conical surfaces of said arcuate tabs into engagement with said conical surface in said annular chamber, and extension means formed on said piston means extending past the inner periphery of said spring retainer ring for selectively engaging said friction discs cooperation between said tabs and conical surface forming the sole retention means for said spring retainer ring in said annular chamber.
Claim 6
Dependent Claim
199 words
For use in a transmission housing including friction discs alternately engageable and disengageable to establish ratio drives, a fluid actuator assembly comprising a support member, an annular chamber formed in an end face of said support member, a spring retainer ring mounted in said annular chamber adjacent said end face, a plurality of arcuate tabs formed on the outer periphery of said spring retainer ring, a conical surface formed on the entire outer peripheral surface of each of said arcuate tabs and an oppositely disposed matching conical surface formed in said annular chamber adjacent said end face, said conical surface of said annular chamber having its smallest diameter position located at said end face, annular piston means slidably mounted in said annular chamber, spring means mounted between said piston means and said spring retainer ring for urging said conical surfaces of said arcuate tabs into engagement with said conical surface in said annular chamber, and extension means formed on said piston means extending past the inner periphery of said spring retainer ring for selectively engaging said friction discs cooperation between said tabs and conical surface forming the sole retention means for said spring retainer ring in said annular chamber.
Claim 7
Dependent Claim
56 words
The fluid actuator assembly described in claim 3, wherein said spring retainer ring is formed sufficiently thin enough to have one or more of said arcuate tabs inserted past said smallest diameter portion of said conical surface and to then permit being bowed to facilitate the insertion of the remaining arcuate tabs into said annular chamber.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |