US3948048A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coaxial cylindrical fluid drive
Assignee: Lawrence Peska Associates Inc
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Filing: 1975-04-21
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Granted: 1976-04-06
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Expires: 1995-04-21
Abstract
Abstract A fluid drive composed of three coaxial cylindrical members mounted coaxially within a cylindrical housing. The outer of the three coaxial members is fixedly secured to an output shaft and the inner of the three coaxial members is fixedly secured to an input shaft. The intermediate cylindrical member has vanes for fluid interaction with vanes on the inner and outer cylinders.
Inventors
- 👤 Elmer Lifka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:56
CPC Classifications
F; F16; F16D; F16D33/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
162 words
A fluid drive comprising: an elongated cylindrical housing having two end walls, colinear input and output shafts protruding centrally from opposite housing end walls, a first cylinder having exterior and interior walls coaxial with and radially spaced within said housing, said first cylinder being fixedly secured to said output shaft and being mounted rotatable with respect to said input shaft, said first cylinder having longitudinally directed vanes projecting inwardly from its interior walls, a second cylinder having interior and exterior walls coaxial with and radially spaced within said first cylinder, said second cylinder being mounted for rotation with respect to both said input and output shafts and having longitudinally directed vanes projecting outwardly from its exterior wall and inwardly from its interior wall, a third cylinder having an exterior wall radially spaced within and coaxial with said second cylinder and having longitudinally directed vanes projecting outward from its exterior wall and fluid within the radial spaces defined between the various aforementioned cylinders.
Claim 2
Dependent Claim
162 words
A fluid drive comprising: an elongated cylindrical housing having two end walls, colinear input and output shafts protruding centrally from opposite housing end walls, a first cylinder having exterior and interior walls coaxial with and radially spaced within said housing, said first cylinder being fixedly secured to said output shaft and being mounted rotatable with respect to said input shaft, said first cylinder having longitudinally directed vanes projecting inwardly from its interior walls, a second cylinder having interior and exterior walls coaxial with and radially spaced within said first cylinder, said second cylinder being mounted for rotation with respect to both said input and output shafts and having longitudinally directed vanes projecting outwardly from its exterior wall and inwardly from its interior wall, a third cylinder having an exterior wall radially spaced within and coaxial with said second cylinder and having longitudinally directed vanes projecting outward from its exterior wall and fluid within the radial spaces defined between the various aforementioned cylinders.
References Cited (Backward Citations)
GB191206787A
Cited
US2259208A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-04-06 | 1979-10-06 | 1980-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-06 | 1983-10-06 | 1984-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-06 | 1987-10-06 | 1988-04-06 | $7700.00 | Window Closed / Lapsed |