US3786776A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alarm device on a clutch
Assignee: Jean Wallerscheild dt GmbH
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Filing: 1972-09-05
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Granted: 1974-01-22
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Expires: 1992-09-05
Abstract
Abstract The clutch is provided with a driven hub on which is mounted a sleeve having a number of leaf springs attached in such a manner that the free ends of the springs are freely moveable and the springs are positioned at an increasing radial distance from the periphery of the sleeve. The clutch housing as the driven member, is provided with a ring having a plurality of axial extensions which are engaged by the free ends of the leaf springs. Relative movement between the driven and driving members causes the free ends of the leaf springs to move rapidly over the axial extensions and produce an audible signal indicating the relative movement.
Inventors
- 👤 T Buthe
- 👤 M Kugler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:25
CPC Classifications
F; F16; F16D; F16D7/00; F16D7/02; F16D7/024; F16D7/025; A; A01; A01B; A01B61/00; A01B61/02; A01B61/025; F16D2300/00; F16D2300/20
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
152 words
In a clutch having an alarm device for indicating relative movement between the driving and driven members of the clutch, the combination of a clutch hub defining a driving member, a sleeve fixed coaxially on said hub and having its outer periphery spaced from the hub, a plurality of leaf springs having one ends thereof attached to the outer periphery of said sleeve and their other ends projecting freely so as to be moveable, a clutch housing defining a driven member, means for drivingly engaging said driving and driven members, a ring mounted on said housing for rotation therewith, and a plurality of axial extensions on said ring extending over said leaf springs and engageable by the free ends of said leaf springs whereby relative movement between said driving and driven members causes said leaf spring free ends to move over said axial extensions to produce an audible signal indicating relative movement.
Claim 2
Dependent Claim
152 words
In a clutch having an alarm device for indicating relative movement between the driving and driven members of the clutch, the combination of a clutch hub defining a driving member, a sleeve fixed coaxially on said hub and having its outer periphery spaced from the hub, a plurality of leaf springs having one ends thereof attached to the outer periphery of said sleeve and their other ends projecting freely so as to be moveable, a clutch housing defining a driven member, means for drivingly engaging said driving and driven members, a ring mounted on said housing for rotation therewith, and a plurality of axial extensions on said ring extending over said leaf springs and engageable by the free ends of said leaf springs whereby relative movement between said driving and driven members causes said leaf spring free ends to move over said axial extensions to produce an audible signal indicating relative movement.
Claim 3
Dependent Claim
35 words
In a clutch as claimed in claim 1 wherein two leaf springs extend at increasing radial distances from the periphery of the sleeve and their free ends extend beyond the periphery of said axial extensions.
Claim 4
Dependent Claim
40 words
In a clutch as claimed in claim 1 wherein said hub has a notch in the periphery thereof, said sleeve has a depressed portion seated in said hub notch to secure said sleeve against rotation with respect to said hub.
Claim 5
Dependent Claim
23 words
In a clutch as claimed in claim 1 wherein said leaf springs taper inwardly from their attached ends toward toward their free ends.
Claim 6
Dependent Claim
87 words
In a clutch as claimed in claim 1 wherein said sleeve comprises a first axial portion having a diameter conforming to that of said hub so as to fit closely thereover and an annular portion extending outwardly of one end of said first axial portion, a second axial portion being positioned at the outer periphral edge of said annular portion and having a greater diameter than that of said first axial portion, said leaf springs being attached on the outer peripheral surface of said second axial portion.
References Cited (Backward Citations)
US2411600A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |