Patent US3842620A successfully refreshed from Google Patents.
US3842620A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Torque transmission device
Assignee: Addmaster Corp
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Filing: 1973-10-29
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Granted: 1974-10-22
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Expires: 1993-10-29
Abstract
Abstract An inexpensive torque transmission device is provided which is applicable as either a brake or a clutch and comprises a conical friction element axially slidable between two relatively rotatable members. The element has a friction surface engageable with one of the members and a toroidal tension spring is tensioned between its conical face and the other of the members to exert a yieldable force urging the element into frictional engagement with the first member thereby transmitting a predetermined torque between the two members. The spring also reduces any tendency for the friction element to rotate relative to the second member.
Inventors
- 👤 M Scozzafava
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:54
CPC Classifications
F; F16; F16D; F16D7/00; F16D7/02
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
88 words
A torque transmission device comprising a pair of spaced members relatively rotatable about an axis, a friction element engageaBle with a first one of said members, said element having an at least substantially conical surface facing the other of said members, means forming a slide bearing supporting said element for movement toward and away from said first member, and an toroidal spring member tensioned over and surrounding said conical surface and engaging said other member whereby to urge said friction element into frictional engagement with said first member.
Claim 2
Dependent Claim
88 words
A torque transmission device comprising a pair of spaced members relatively rotatable about an axis, a friction element engageaBle with a first one of said members, said element having an at least substantially conical surface facing the other of said members, means forming a slide bearing supporting said element for movement toward and away from said first member, and an toroidal spring member tensioned over and surrounding said conical surface and engaging said other member whereby to urge said friction element into frictional engagement with said first member.
Claim 3
Dependent Claim
20 words
A torque transmission device as defined in claim 1 wherein said spring member comprises a helically wound wire tension spring.
Claim 4
Dependent Claim
29 words
A torque transmission device as defined in claim 1 wherein said means comprises a cylindrical post rotatably supporting at least one of said members for movement about said axis.
Claim 5
Dependent Claim
90 words
A torque transmission device comprising a pair of spaced members, means on one of said members forming a bearing, the other of said members being rotatably supported by said bearing, a friction element intermediate said members, said element having an at least substantially conical surface extending concentric with the axis of said bearing and facing the other of said members, and an expansible toroidal spring member tensioned over surrounding said conical surface and engaging said other member whereby to urge said friction element into frictional engagement with said first member.
Claim 6
Dependent Claim
90 words
A torque transmission device comprising a pair of spaced members, means on one of said members forming a bearing, the other of said members being rotatably supported by said bearing, a friction element intermediate said members, said element having an at least substantially conical surface extending concentric with the axis of said bearing and facing the other of said members, and an expansible toroidal spring member tensioned over surrounding said conical surface and engaging said other member whereby to urge said friction element into frictional engagement with said first member.
Claim 7
Dependent Claim
19 words
A torque transmission device as defined in claim 1 wherein said friction element is slidably supported by said bearing
Claim 8
Dependent Claim
21 words
A torque transmission device as defined in claim 5 wherein said conical surface extends concentric with said axis of said bearing.
Claim 9
Dependent Claim
105 words
A torque transmission device comprising a pair of spaced members having parallel facing surfaces, means on one of said members forming a bearing having an axis extending perpendicular to said surfaces, said bearing rotatably supporting the other of said members, a friction element having a surface frictionally engageable with a first one of said facing surfaces, said element having an at least substantially conical surface facing the other of said facing surfaces, and an expansible toroidal spring member tensioned over and surrounding said conical surface and engaging said other facing surface whereby to urge said friction element into frictional engagement with said first facing surface.
Claim 10
Dependent Claim
105 words
A torque transmission device comprising a pair of spaced members having parallel facing surfaces, means on one of said members forming a bearing having an axis extending perpendicular to said surfaces, said bearing rotatably supporting the other of said members, a friction element having a surface frictionally engageable with a first one of said facing surfaces, said element having an at least substantially conical surface facing the other of said facing surfaces, and an expansible toroidal spring member tensioned over and surrounding said conical surface and engaging said other facing surface whereby to urge said friction element into frictional engagement with said first facing surface.
Claim 11
Dependent Claim
108 words
A printing ribbon spool support comprising a support member, a bearing member carried by said support member, a ratchet wheel rotatably supported by said beainr member, a ribbon spool rotatably supported by said bearing member, means operatively connecting said spool to said ratchet wheel, a conical friction element intermediate said member and said ratchet wheel, said friction element being slidably supported by said bearing member, said friction element having a frictional surface engageable with said ratchet wheel, and an expansible toroidal spring member tensioned over and surrounding said conical surface and engaging said support member whereby to urge said friction element into frictional engagement with said ratchet wheel.
Claim 12
Dependent Claim
108 words
A printing ribbon spool support comprising a support member, a bearing member carried by said support member, a ratchet wheel rotatably supported by said beainr member, a ribbon spool rotatably supported by said bearing member, means operatively connecting said spool to said ratchet wheel, a conical friction element intermediate said member and said ratchet wheel, said friction element being slidably supported by said bearing member, said friction element having a frictional surface engageable with said ratchet wheel, and an expansible toroidal spring member tensioned over and surrounding said conical surface and engaging said support member whereby to urge said friction element into frictional engagement with said ratchet wheel.
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) | 1977-10-21 | 1978-04-22 | 1978-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-21 | 1982-04-22 | 1982-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-21 | 1986-04-22 | 1986-10-22 | $7700.00 | Window Closed / Lapsed |