US3575269A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid coupling
Assignee: Eagle Parts Co Inc
•
Filing: 1969-09-12
•
Granted: 1971-04-20
•
Expires: 1989-09-12
Abstract
Abstract A fluid coupling of the type having relatively rotatable slightly spaced members operating in a viscous shear medium such as silicone fluid and whereby torque is transmitted from one member to the other at relatively low speeds. The present invention is characterized by indentations in one or both of the members where they face each other so as to entrap some of the fluid and thereby increase the shearing effect.
Inventors
- 👤 Scott G Sherman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:47
CPC Classifications
F; F16; F16D; F16D35/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
55 words
A fluid coupling including a rotatable housing containing viscous fluid, an input shaft extending into said housing, a rotor rigidly mounted on the inner end of said shaft, said housing and said shaft having circular opposing working surfaces, and radially spaced indentations having continuously closed peripheries therearound in at least one of said working surfaces.
Claim 2
Dependent Claim
55 words
A fluid coupling including a rotatable housing containing viscous fluid, an input shaft extending into said housing, a rotor rigidly mounted on the inner end of said shaft, said housing and said shaft having circular opposing working surfaces, and radially spaced indentations having continuously closed peripheries therearound in at least one of said working surfaces.
Claim 3
Dependent Claim
24 words
A fluid coupling as defined in claim 1 and wherein said indentations are comprised of radial slots about the axis of said working surfaces.
Claim 4
Dependent Claim
36 words
A fluid coupling as defined in claim 1 and wherein said rotor has openings therethrough, at least some of which communicate with the inner edges of said indentations relative to the axes of said working surfaces.
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) | 1974-04-19 | 1974-10-19 | 1975-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-19 | 1978-10-19 | 1979-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-19 | 1982-10-19 | 1983-04-20 | $7700.00 | Window Closed / Lapsed |