Patent US3718009A successfully refreshed from Google Patents.
US3718009A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Breakaway clutch
Assignee: American Velcro Inc
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Filing: 1971-03-26
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Granted: 1973-02-27
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Expires: 1991-03-26
Abstract
Abstract A power transmission clutch has driving and driven members which are interconnected by means of hooking elements and these members are so supported that they can move out of contact with each other if and when the torque transmitted exceeds the capacity of the hooking elements. The clutch can be used to transmit power to the propeller of a small boat from the shaft of the boat engine. In this case the device is so constructed that the propeller cannot be lost should disengagement of the hooking elements on the driving and driven members occur.
Inventors
- 👤 J Perina
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:14
CPC Classifications
F; F16; F16D; F16D7/00; Y; Y10; Y10S; Y10S464/00; Y10S464/902; Y10S464/903
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
202 words
A torque breakaway clutch for transmitting rotational torque from a driving shaft member to a driven shaft member comprising: a. driving and driven members having interengaging oppositely faced surfaces of mating hook and loop-type elements positioned in face-to-face relation, said hooks facing in substantially the same generally circumferential direction over the surface of at least one of said clutch members, the hooks and loops being of the type wherein a large number of hooks engage a large number of loops and resist separation parallel to the interfacial plane of engagement, but are readily separable by peeling forces substantially normal to the interfacial plane; and b. means for supporting said clutch members in face-to-face relation while a rotational torque is transmitted from the driving shaft member to the driven shaft member, said clutch members being characterized by the property that when a predetermined torque is applied sufficient to exceed the engagement of said elements in a direction parallel to the interfacial plane, the hook and loop-type elements breakaway and slip past one another during the application of said predetermined torque, but upon removal thereof, said elements reengage and resume transmission of rotational torque from the driving shaft member to the driven shaft member.
Claim 2
Dependent Claim
202 words
A torque breakaway clutch for transmitting rotational torque from a driving shaft member to a driven shaft member comprising: a. driving and driven members having interengaging oppositely faced surfaces of mating hook and loop-type elements positioned in face-to-face relation, said hooks facing in substantially the same generally circumferential direction over the surface of at least one of said clutch members, the hooks and loops being of the type wherein a large number of hooks engage a large number of loops and resist separation parallel to the interfacial plane of engagement, but are readily separable by peeling forces substantially normal to the interfacial plane; and b. means for supporting said clutch members in face-to-face relation while a rotational torque is transmitted from the driving shaft member to the driven shaft member, said clutch members being characterized by the property that when a predetermined torque is applied sufficient to exceed the engagement of said elements in a direction parallel to the interfacial plane, the hook and loop-type elements breakaway and slip past one another during the application of said predetermined torque, but upon removal thereof, said elements reengage and resume transmission of rotational torque from the driving shaft member to the driven shaft member.
Claim 3
Dependent Claim
73 words
The power transmission clutch according to claim 1 wherein the clutch members are circular flange members and the hook and loop-type hooking elements project from fabrics bonded to the surfaces of said clutch members, the hook-type elements of at least the driving member projecting from wedge-shaped sections of said fabric and arranged to be facing in the same generally circumferential direction of rotation, thereby facilitating a maximum torque breakaway value for said clutch.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-27 | 1976-08-28 | 1977-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-27 | 1980-08-28 | 1981-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-27 | 1984-08-28 | 1985-02-27 | $7700.00 | Window Closed / Lapsed |