Patent US3561577A successfully refreshed from Google Patents.
US3561577A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple disc clutch with automatic wear adjuster
Assignee: ZF Friedrichshafen AG
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Filing: 1969-03-14
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Granted: 1971-02-09
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Expires: 1989-03-14
Abstract
Abstract A double-plate friction clutch in which the axial movement of the spring-loaded intermediate driving plate away from the flywheel is limited by an improved mechanism. An abutment member is axially slidably mounted on the intermediate disc in axial alignment with two abutments on the flywheel which are oppositely offset from the abutment member. A friction brake on the intermediate disc prevents axial shifting of the abutment member under the pressure of the relatively weak springs pushing the intermediate plate away from the flywheel, but cannot prevent shifting of the abutment member by the more powerful pressure plate springs so that the position of the abutment member on the intermediate disc is adjusted during each clutch adjustment for wear of the friction facing on the driven disc on the flywheel side.
Inventors
- 👤 Richard Binder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:51
CPC Classifications
F; F16; F16D; F16D13/00; F16D13/22; F16D13/38; F16D13/385
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
281 words
In a friction clutch for a motor vehicle and the like, the clutch having an axis, two axially spaced driving pressure members (3,7) connected for joint rotation about said axis; an intermediate plate member (9) axially movable between said pressure members and secured to the same for rotation with the same; two driven friction discs (5a, 5b) axially movably interposed between said pressure members respectively and said plate member; first yieldably resilient means (30) biasing one of said pressure members (3) toward the other pressure member (7) for simultaneous frictional engagement of said discs with the respective pressure members and with said plate member; clutchreleasing means 4, 8 for moving said one pressure member away from the other pressure member against the restraint of said yieldably resilient means; second yieldably resilient means (20) biasing said plate member away from said other pressure member with a force smaller than the force of said first yieldably resilient means; and limiting means for limiting the axial movement of said plate member; the improvement in said limiting means which comprises: a. an abutment member (15) mounted on said plate member (9) for axial movement relative thereto; b. two abutment means (32,33) fixed on said other pressure member (7) in axial alignment with said abutment member and offset from the same in opposite axial directions; and c. friction means 11, 12 on said plate member, engaging said abutment member with a frictional force sufficient for overcoming the force of said second yieldably resilient means (20), but not sufficient for preventing said axial movement of the abutment member by engagement with one of said abutment means (33) under the force of said first yielDably resilient means (30).
Claim 2
Dependent Claim
281 words
In a friction clutch for a motor vehicle and the like, the clutch having an axis, two axially spaced driving pressure members (3,7) connected for joint rotation about said axis; an intermediate plate member (9) axially movable between said pressure members and secured to the same for rotation with the same; two driven friction discs (5a, 5b) axially movably interposed between said pressure members respectively and said plate member; first yieldably resilient means (30) biasing one of said pressure members (3) toward the other pressure member (7) for simultaneous frictional engagement of said discs with the respective pressure members and with said plate member; clutchreleasing means 4, 8 for moving said one pressure member away from the other pressure member against the restraint of said yieldably resilient means; second yieldably resilient means (20) biasing said plate member away from said other pressure member with a force smaller than the force of said first yieldably resilient means; and limiting means for limiting the axial movement of said plate member; the improvement in said limiting means which comprises: a. an abutment member (15) mounted on said plate member (9) for axial movement relative thereto; b. two abutment means (32,33) fixed on said other pressure member (7) in axial alignment with said abutment member and offset from the same in opposite axial directions; and c. friction means 11, 12 on said plate member, engaging said abutment member with a frictional force sufficient for overcoming the force of said second yieldably resilient means (20), but not sufficient for preventing said axial movement of the abutment member by engagement with one of said abutment means (33) under the force of said first yielDably resilient means (30).
Claim 3
Dependent Claim
43 words
In a clutch as set forth in claim 1, said abutment member having two axially spaced abutment faces respectively opposite said abutment means, and the axil axial spacing of said abutment faces being smaller than the axial spacing of said two abutment means.
Claim 4
Dependent Claim
23 words
In a clutch as set forth in claim 2, said abutment member being axially elongated, and said abutment faces thereof being longitudinally spaced.
Claim 5
Dependent Claim
58 words
In a clutch as set forth in claim 1, mounting means securing said abutment member to a circumferential face of said plate member, said friction means including two elements of high friction material, said abutment member being radially interposed between said two elements, and third yieldably resilient means urging said elements into frictional engagement with said abutment member.
Claim 6
Dependent Claim
56 words
In a clutch as set forth in claim 4, said mounting means including a strap member releasably fastened to said plate member, a pin member mounted on said strap member and being received in an axially elongated opening of said abutment member, said third yieldably resilient means including a spring member abutting against said pin member.
Claim 7
Dependent Claim
26 words
In a clutch as set forth in claim 5, said strap member being U-shaped, the bight of said U-shape receiving said abutment member in guiding engagement.
Claim 8
Dependent Claim
31 words
In a clutch as set forth in claim 5, said plate member being formed with a radial bore, said pin member and said spring member being partly received in said bore.
Claim 9
Dependent Claim
22 words
In a clutch as set forth in claim 4, adjusting means for adjusting the urging force of said third yieldably resilient means.
Claim 10
Dependent Claim
23 words
In a clutch as set forth in claim 1, mounting means securing said abutment member to a circumferential face of said plate member.
Claim 11
Dependent Claim
21 words
In a clutch as set forth in claim 9, said mounting means releasably securing said abutment member to said circumferential face.
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) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |