Patent US3909158A successfully refreshed from Google Patents.
US3909158A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vane type fluid motor
Assignee: Individual
•
Filing: 1973-11-16
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Granted: 1975-09-30
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Expires: 1993-11-16
Abstract
Abstract A motor for producing power from a pressurized fluid, incorporating an elongated stator housing with an interior surface against which the vanes seal. The vanes are mounted in a rotor housing and are biased into sealing contact with the walls of the stator housing by a pneumatic compensator. The pneumatic compensator incorporates a bladder which is pressurized to produce a radially outward bias, on the vanes. The net volume of the compensator is constant due to the opposite movement of adjacent pairs of vanes.
Inventors
- 👤 William A Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:06
CPC Classifications
F; F01; F01C; F01C21/00; F01C21/08; F01C21/0809; F01C21/0818; F01C21/0854; F01C21/0872; F01C1/00; F01C1/30; F01C1/34; F01C1/344; F01C1/3446; F01C21/0827; F01C21/0845
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
114 words
A rotary fluid driven motor comprising: a stator housing, a rotor mounted within said stator housing for relative rotation to said stator housing, said rotor comprising a rotor housing, a plurality of rotor vanes, and a pneumatic compensator means for maintaining a radially outward bias on said rotor vanes, said rotor vanes being mounted for reciprocating radial movement and having an outer end including seal means for sealing against the inner walls of said stator housing during rotation of said rotor, said pneumatic compensator means being mounted in said rotor housing and contacting the inner ends of said rotor vanes, said pneumatic compensator means comprising a bladder means for containing compressible fluid under pressure.
Claim 2
Dependent Claim
114 words
A rotary fluid driven motor comprising: a stator housing, a rotor mounted within said stator housing for relative rotation to said stator housing, said rotor comprising a rotor housing, a plurality of rotor vanes, and a pneumatic compensator means for maintaining a radially outward bias on said rotor vanes, said rotor vanes being mounted for reciprocating radial movement and having an outer end including seal means for sealing against the inner walls of said stator housing during rotation of said rotor, said pneumatic compensator means being mounted in said rotor housing and contacting the inner ends of said rotor vanes, said pneumatic compensator means comprising a bladder means for containing compressible fluid under pressure.
Claim 3
Dependent Claim
39 words
The rotary fluid driven motor according to claim 1 wherein said stator housing includes intake ports and exhaust ports, and said exhaust ports having a greater angular extent along the walls of said stator housing than said intake ports.
Claim 4
Dependent Claim
28 words
The rotary fluid driven motor according to claim 1 wherein said bladder means comprises a flexible cord reinforced bladder with an air intake portion penetrating said stator housing.
Claim 5
Dependent Claim
19 words
The rotary fluid driven motor according to claim 1 wherein said stator housing comprises two diametrically opposed working chambers.
Claim 6
Dependent Claim
46 words
The rotary driven motor according to claim 4, wherein: said stator housing includes intake ports and exhaust ports, and said exhaust ports are canted toward an associated working chamber and have a greater angular extent along the walls of said stator housing than said intake ports.
Claim 7
Dependent Claim
21 words
The rotary fluid driven motor according to claim 1 wherein said rotor includes substantially cylindrical end plates with integral shaft extensions.
Claim 8
Dependent Claim
18 words
The rotary fluid driven motor according to claim 6 wherein said vanes are sealed against said end plates.
Claim 9
Dependent Claim
27 words
The rotary fluid driven motor according to claim 6 wherein said vanes in the maximum diameter portions of said rotor housiNg sweep across substantially half-moon shaped inserts.
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) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |