US3747729A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Friction drive establishing device clearance control mechanism
Assignee: Motors Liquidation Co
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Filing: 1972-01-21
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Granted: 1973-07-24
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Expires: 1992-01-21
Abstract
Abstract A method and apparatus for establishing a predetermined clearance disc-type drive establishing friction device. The friction disc and a backing or pressure plate having openings therein assembled in a housing. A threaded member is inserted into the opening and threaded into the housing until all of the clearance between the discs is removed and then unthreaded until the desired clearance between the discs is established. A removable stop member on the threaded member permits the backing or pressure plate to be removed and reinstalled so that a return spring can be assembled circumjacent the threaded member without affecting the preset clearance. The clearance may also be established by using shims to control clearance when the threaded member is threaded into the housing.
Inventors
- 👤 J Storer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:10
CPC Classifications
F; F16; F16D; F16D25/00; F16D25/06; F16D25/062; F16D25/063; F16D25/0635; F16D25/0638; F16D25/10; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/4984
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
155 words
A method of establishing clearance in a disc-type drive establishing friction device having alternately spaced friction discs adapted to be drivingly connected to a housing and a gear component respectively, said method comprising: locating said friction discs in said housing; locating a backing member in said housing adjacent the outermost one of said friction discs; securing a stop member on a threaded fastener; threading said threaded fastener into said housing through openings in said backing member and said friction discs until said stop member abuts said backing member and said backing member and said friction discs are in abutting relationship; unthreading said fastener from said housing until the desired clearance is established between said backing member and said friction discs; removing said stop member and said backing member from said fastener; placing a return spring on said fastener; and reassembling said backing member and said stop member on said fastener to compress said return spring.
Claim 2
Independent Claim
155 words
A method of establishing clearance in a disc-type drive establishing friction device having alternately spaced friction discs adapted to be drivingly connected to a housing and a gear component respectively, said method comprising: locating said friction discs in said housing; locating a backing member in said housing adjacent the outermost one of said friction discs; securing a stop member on a threaded fastener; threading said threaded fastener into said housing through openings in said backing member and said friction discs until said stop member abuts said backing member and said backing member and said friction discs are in abutting relationship; unthreading said fastener from said housing until the desired clearance is established between said backing member and said friction discs; removing said stop member and said backing member from said fastener; placing a return spring on said fastener; and reassembling said backing member and said stop member on said fastener to compress said return spring.
Claim 3
Dependent Claim
228 words
A disc-type drive establishing frictin device having a predetermined free-running clearance comprising: a housing having an radial wall; drive connecting means extending axially from said radial wall; first disc members drivingly connected to said drive connecting means; second disc members alternately spaced of said first disc members; pressure plate means adjacent one of said disc members spaced furthest from said radial wall and being drivingly connected to said drive connecting means; aperture means in said pressure plate; fluid operated piston means slidably disposed in said housing adjacent said pressure plate means for selectively moving said pressure plate means toward said radial wall into abutting relationship with said one of said disc members; threaded fastener means threadably engaged in said radial wall and extending axially therefrom through said aperture means and having a grooved portion spaced from said radial wall; stop means secured to said threaded fastener means in said grooved portion a predetermined distance from said radial wall adjacent said pressure plate means for limiting the movement of said pressure plate means in one direction away from said radial wall for establishing a predetermined clearance between said disc members and said pressure plate means; and spring means compressed between said radial wall and said pressure plate means circumjacent said threaded fastener for urging said pressure plate means in said one direction into abutting relation with said stop means.
Claim 4
Dependent Claim
228 words
A disc-type drive establishing frictin device having a predetermined free-running clearance comprising: a housing having an radial wall; drive connecting means extending axially from said radial wall; first disc members drivingly connected to said drive connecting means; second disc members alternately spaced of said first disc members; pressure plate means adjacent one of said disc members spaced furthest from said radial wall and being drivingly connected to said drive connecting means; aperture means in said pressure plate; fluid operated piston means slidably disposed in said housing adjacent said pressure plate means for selectively moving said pressure plate means toward said radial wall into abutting relationship with said one of said disc members; threaded fastener means threadably engaged in said radial wall and extending axially therefrom through said aperture means and having a grooved portion spaced from said radial wall; stop means secured to said threaded fastener means in said grooved portion a predetermined distance from said radial wall adjacent said pressure plate means for limiting the movement of said pressure plate means in one direction away from said radial wall for establishing a predetermined clearance between said disc members and said pressure plate means; and spring means compressed between said radial wall and said pressure plate means circumjacent said threaded fastener for urging said pressure plate means in said one direction into abutting relation with said stop means.
Claim 5
Independent Claim
129 words
A method of establishing clearance in a disc-type drive establishing friction device having alternately spaced friction discs adapted to be drivingly connected to a housing and a gear component respectively, said method comprising: locating said friction discs in said housing; locating a backing member in said housing adjacent the outermost one of said friction discs; securing a stop member on a threaded fastener; threading said threaded fastener into said housing through openings in said backing member and said friction discs until the desired clearance is established between said backing member and said friction discs; removing said stop member and said backing member from said fastener; placing a return spring on said fastener; and reassembling said backing member and said stop member on said fastener to compress said return spring.
Claim 6
Independent Claim
129 words
A method of establishing clearance in a disc-type drive establishing friction device having alternately spaced friction discs adapted to be drivingly connected to a housing and a gear component respectively, said method comprising: locating said friction discs in said housing; locating a backing member in said housing adjacent the outermost one of said friction discs; securing a stop member on a threaded fastener; threading said threaded fastener into said housing through openings in said backing member and said friction discs until the desired clearance is established between said backing member and said friction discs; removing said stop member and said backing member from said fastener; placing a return spring on said fastener; and reassembling said backing member and said stop member on said fastener to compress said return spring.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-23 | 1977-01-22 | 1977-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-23 | 1981-01-22 | 1981-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-23 | 1985-01-22 | 1985-07-24 | $7700.00 | Window Closed / Lapsed |