US3880451A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Force transmitting coupling
Assignee: Individual
•
Filing: 1972-05-01
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Granted: 1975-04-29
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Expires: 1992-05-01
Abstract
Abstract A coupling for use with two relatively movable members to transmit force between said members comprising a resilient element having a plurality of convolutions positioned between the members and a solid core element positioned within the convolutions of said resilient element, said resilient element being positioned such that the relative movement of said members urges said convolutions into frictional engagement with both of said members. The solid core element is of a size such that when frictional engagement of said members with said convolutions occurs, the convolutions are prevented from being distorted beyond their elastic limit to thereby cause permanent set of the resilient element.
Inventors
- 👤 Robert B Kinzbach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:39
CPC Classifications
F; F16; F16L; F16L15/00; F16L15/001; F16L15/003; E; E21; E21B; E21B17/00; E21B17/02; E21B17/04; E21B17/06; E21B19/00; E21B19/16; F16D; F16D41/00; F16D41/06; F16D41/064; F16D41/066; F16L21/00; F16L21/08; F16L55/00; E21B19/10; E21B19/102
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
120 words
In combination with two relatively movable members concentrically engageable at abutting ends and having means for gradually urging said members together along their common axis, each of said members being provided with an annular raceway in axially registering relation to one another, a device for transmitting force between said members comprising an annular coil spring having a solid core element positioned within the convolutions of said spring, said convolutions being disposed between said axially registering raceways so as to be urged into gripping engagement with the raceway surfaces when said members are urged together, said solid core element being sized such as to prevent said convolutions from being distorted beyond their elastic limit thereby causing permanent set of said spring.
Claim 2
Dependent Claim
120 words
In combination with two relatively movable members concentrically engageable at abutting ends and having means for gradually urging said members together along their common axis, each of said members being provided with an annular raceway in axially registering relation to one another, a device for transmitting force between said members comprising an annular coil spring having a solid core element positioned within the convolutions of said spring, said convolutions being disposed between said axially registering raceways so as to be urged into gripping engagement with the raceway surfaces when said members are urged together, said solid core element being sized such as to prevent said convolutions from being distorted beyond their elastic limit thereby causing permanent set of said spring.
Claim 3
Dependent Claim
47 words
The combination of claim 1 wherein said raceways have a circular curvature and substantially the same radius of transverse curvature extending from a common annular element axis therebetween, and said convolutions are circular and have a radius of curvature less than the transverse radius of raceway curvature.
Claim 4
Dependent Claim
11 words
The combination of claim 2 wherein said members are elongate members.
Claim 5
Dependent Claim
21 words
The combination of claim 1 including means to retain said device on one of said members when said members are sepArated.
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) | 1978-04-28 | 1978-10-28 | 1979-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-28 | 1982-10-28 | 1983-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-28 | 1986-10-28 | 1987-04-29 | $7700.00 | Window Closed / Lapsed |