Patent US4289223A successfully refreshed from Google Patents.
US4289223A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shiftable friction clutch for gear drives
Assignee: ZF-HURTH MARINE SpA
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Filing: 1979-05-24
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Granted: 1981-09-15
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Expires: 1999-05-24
Abstract
Abstract A shiftable friction clutch for gear drives, in which a shift collar is arranged axially movably on a carrier sleeve which is mounted on the shaft which must be coupled to a gear, and in which at least one axially movable friction ring is provided, which belongs to a first clutch half and which cooperates through clutch friction surfaces with a second clutch half and which is supported through rolling elements on the carrier sleeve for producing the contact pressure by means of pressure surfaces which are arranged on the front surfaces remote from the clutch surfaces and which are inclined with respect to the plane of rotation. The friction clutch is constructed as a spring-loaded safety clutch, in which the friction members which are pressed onto one another during the starting or engagement operation are supported against a spring.
Inventors
- 👤 Richard Strehler
- 👤 Max Bartl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:40
CPC Classifications
F; F16; F16D; F16D7/00; F16D7/02; F16D7/024; F16D7/028; F16D13/00; F16D13/04; F16D13/22; F16D13/24; F16D13/26; F16D21/00; F16D21/02; F16D21/04; F16D47/00; F16D47/02
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
152 words
In a shiftable friction clutch for gear drives comprising a shift collar axially movably supported on a carrier sleeve mounted on a shaft and which must be coupled to a gear, at least one axially movable friction ring constituting a first clutch half and cooperating with a second clutch half through clutch friction surfaces, said first clutch half being axially movably supported through rolling elements engaging inclined surfaces on axially mutually facing sides of said carrier sleeve and said friction ring, said inclined surfaces being inclined with respect to the plane of rotation, the improvement comprising wherein said carrier sleeve is mounted for axial movement on said shaft and wherein a supporting spring is provided on the side of said carrier sleeve remote from said clutch friction surfaces between said carrier sleeve and said shaft for limiting the maximum transmittable torque when said clutch friction surfaces are in engagement with each other.
Claim 2
Dependent Claim
152 words
In a shiftable friction clutch for gear drives comprising a shift collar axially movably supported on a carrier sleeve mounted on a shaft and which must be coupled to a gear, at least one axially movable friction ring constituting a first clutch half and cooperating with a second clutch half through clutch friction surfaces, said first clutch half being axially movably supported through rolling elements engaging inclined surfaces on axially mutually facing sides of said carrier sleeve and said friction ring, said inclined surfaces being inclined with respect to the plane of rotation, the improvement comprising wherein said carrier sleeve is mounted for axial movement on said shaft and wherein a supporting spring is provided on the side of said carrier sleeve remote from said clutch friction surfaces between said carrier sleeve and said shaft for limiting the maximum transmittable torque when said clutch friction surfaces are in engagement with each other.
Claim 3
Dependent Claim
52 words
The shiftable friction clutch according to claim 1, wherein the axial movement of said friction ring which is moved axially by said rolling elements which run onto said inclined surfaces is limited in direction toward said clutch friction surface in the direction of clutch engagement by at least a first stop means.
Claim 4
Dependent Claim
27 words
The shiftable friction clutch according to claim 2, wherein a second stop means is provided for limiting the movement of said friction ring in the peripheral direction.
Claim 5
Dependent Claim
59 words
The shiftable friction clutch according to claim 1, wherein said supporting spring is housed in an annular chamber defined substantially by the axially facing and opposed sides of said carrier sleeve and an axially fixed structural part on said shaft on a side of said carrier sleeve remote from said clutch friction surfaces, and the periphery of said shaft.
References Cited (Backward Citations)
US2546712A
Cited
US2874817A
Cited
US3189147A
Cited
US3203525A
Cited
DE1625849C3
Cited
US3703226A
Cited
DE2225096C3
Cited
US4118996A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-09-14 | 1985-03-16 | 1985-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-14 | 1989-03-16 | 1989-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-14 | 1993-03-16 | 1993-09-15 | $7700.00 | Window Closed / Lapsed |