US3695406A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coupling with carbon and beryllium friction surfaces
Assignee: SKW ACQUISITION Corp
•
Filing: 1970-11-02
•
Granted: 1972-10-03
•
Expires: 1990-11-02
Abstract
Abstract A brake or clutch for extreme heavy duty may have a friction material which is substantially all carbon and which, for periods of disengagement, is free floating rotationally between a pair of solid or segmented metal members. Said metal members may each rotate, or one may rotate while the other does not rotate. Axially short means may support the friction material and be used to serve as a visible warning of wear. Beryllium is a preferred opposing surface material when used with friction material which is substantially all carbon.
Inventors
- 👤 Glenn R Graham
- 👤 Robert W Biggs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:05
CPC Classifications
F; F16; F16D; F16D69/00; F16D69/02; F16D66/00; F16D66/02; F16D65/00; F16D65/02; F16D65/12; F16D65/125; F16D65/126
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
144 words
A brake or clutch mechanism having a main axis and having conventional splines coaxial thereabout and also having at least one friction which has an ''''A'''' material and, for selective engagement therewith, a ''''B'''' material, one of the A and B materials being substantially all carbon at its surface which mates with the other material of the couple, the other of the A and B materials being predominantly beryllium and existing as a homogenous, stand-alone member which is not only beryllium at an innermost core thereof which serves as its heat sink but which is also predominantly beryllium at a surface of said member which mates in rubbing engagement with the other material of the couple and which is also predominantly beryllium at another surface thereof which exposes itself for sliding restraint so that these surfaces present axial sliding and also provide circumferential torque.
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) | 1975-10-03 | 1976-04-03 | 1976-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-03 | 1980-04-03 | 1980-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-03 | 1984-04-03 | 1984-10-03 | $7700.00 | Window Closed / Lapsed |