Patent US2228643A successfully refreshed from Google Patents.
Patent US4010618A successfully refreshed from Google Patents.
Patent US3700293A successfully refreshed from Google Patents.
US3700293A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piston type thrust bearing
Assignee: United States Department of the Navy
•
Filing: 1971-04-07
•
Granted: 1972-10-24
•
Expires: 1991-04-07
Abstract
Abstract The invention is a piston type thrust bearing wherein the rotating shaft has a radially extending plate attached thereto which defines a piston in a cylinder having fluid pressure acting axially on opposite sides of said piston to absorb thrust loads.
Inventors
- 👤 James F Dray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:06
CPC Classifications
F; F16; F16C; F16C32/00; F16C32/06; F16C32/0681; F16C32/0692
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
120 words
A thrust bearing comprising: a hollow housing; a rotatably mounted shaft extending through opposite ends of said housing; piston means concentrically mounted on and extending radially from said shaft and in sliding engagement with the inside wall of said housing, said piston means defining two chambers within said housing, one on each side of said piston means; inlet and outlet valves connected to each of said chambers to control the flow of fluid under pressure into and out of said chambers, said fluid acting on said piston means to balance axial thrust of said shaft; and a microswitch contacting said piston means to sense the position of said piston means so that valves can be actuated to balance axial thrust.
Claim 2
Dependent Claim
120 words
A thrust bearing comprising: a hollow housing; a rotatably mounted shaft extending through opposite ends of said housing; piston means concentrically mounted on and extending radially from said shaft and in sliding engagement with the inside wall of said housing, said piston means defining two chambers within said housing, one on each side of said piston means; inlet and outlet valves connected to each of said chambers to control the flow of fluid under pressure into and out of said chambers, said fluid acting on said piston means to balance axial thrust of said shaft; and a microswitch contacting said piston means to sense the position of said piston means so that valves can be actuated to balance axial thrust.
Claim 3
Dependent Claim
14 words
A device as in claim 1, wherein said valves are electrically actuated servo valves.
References Cited (Backward Citations)
US303813A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-24 | 1976-04-24 | 1976-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-24 | 1980-04-24 | 1980-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-24 | 1984-04-24 | 1984-10-24 | $7700.00 | Window Closed / Lapsed |