Patent US3680982A successfully refreshed from Google Patents.
US3680982A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary actuator
Assignee: GREE HYDRAULICS OF CALIFORNIA Inc
•
Filing: 1971-03-03
•
Granted: 1972-08-01
•
Expires: 1991-03-03
Abstract
Abstract The invention relates to a rotary actuator of the type having a movable vane positioned in a cylindrical casing and secured to and extending radially outward from a shaft extending axially through the casing and a fixed vane extending radially in the casing toward the axial shaft, so that the fixed vane and the movable vane define two variable volume cavities in each of which a deformable bladder is positioned, with means being provided to permit fluid under pressure to pass into and out of said bladders, to effect expansion of one of the bladders for consequent movement of said movable vane and the shaft to which it is secured, with resultant compression of the other bladder and expulsion of the fluid therefrom.
Inventors
- 👤 Alphonse A Jacobellis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:46
CPC Classifications
F; F15; F15B; F15B15/00; F15B15/08; F15B15/10; F15B15/103; F15B15/12
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
159 words
A rotary actuator comprising a cylindrical casing closed at both ends, a shaft extending axially through said casing and rotatably mounted with respect thereto, said casing having a vane fixed at one end thereto and extending radially inward from the inner wall of the casing toward the axis thereof, said vane extending the entire length of said casing, the inner end of said vane defining a seat for said shaft, said shaft having a vane rigid at one end therewith and extending radially outward from the axis of said shaft, the free end of said shaft vane being positioned closely adjacent the inner surface of said cylindrical casing, whereby said shaft and the vane carried thereby is free to rotate in both a clockwise or counterclockwise direction, said fixed vane and said movable vane defining a chamber on each side thereof, a deformable bladder positioned in each of said chambers, each of said bladders having a port leading thereinto.
Claim 2
Dependent Claim
159 words
A rotary actuator comprising a cylindrical casing closed at both ends, a shaft extending axially through said casing and rotatably mounted with respect thereto, said casing having a vane fixed at one end thereto and extending radially inward from the inner wall of the casing toward the axis thereof, said vane extending the entire length of said casing, the inner end of said vane defining a seat for said shaft, said shaft having a vane rigid at one end therewith and extending radially outward from the axis of said shaft, the free end of said shaft vane being positioned closely adjacent the inner surface of said cylindrical casing, whereby said shaft and the vane carried thereby is free to rotate in both a clockwise or counterclockwise direction, said fixed vane and said movable vane defining a chamber on each side thereof, a deformable bladder positioned in each of said chambers, each of said bladders having a port leading thereinto.
Claim 3
Dependent Claim
71 words
The combination set forth in claim 1 in which said shaft vane is of width slightly less than the longitudinal distance between the closed ends of said casing and of radial length just slightly less than the radius of said casing thereby providing minimum clearance between thE side edges of said vane and said closed ends of said casing and between the outer end of said vane and said casing wall.
Claim 4
Dependent Claim
31 words
The combination set forth in claim 2 in which the outer end of said vane is arcuately curved to conform to the curvature of the inner surface of said cylindrical casing.
Claim 5
Dependent Claim
56 words
The combination set forth in claim 1 in which each of said bladders is of resilient material capable of stretching and contracting and a fitting is secured at one end to each of said bladders adjacent the outer end of said fixed vane, said fitting extending through the wall of said casing and defining said port.
Claim 6
Dependent Claim
29 words
The combination set forth in claim 1 in which means are provided to limit the angular rotation of said movable vane in both a clockwise and a counterclockwise direction.
Claim 7
Dependent Claim
81 words
The combination set forth in claim 1 in which said shaft has a portion protruding from one of the closed ends of said casing, said protruding portion having a radially extending rigid member aligned with the movable vane, and the closed end of said casing through which the shaft extends, has an abutment extending outwardly therefrom aligned with the rigid vane, engagement of said abutment by said rigid member limiting rotation of said movable vane in a clockwise and counterclockwise direction.
Claim 8
Dependent Claim
29 words
The combination set forth in claim 1 in which said cylindrical casing has end plates removably secured to the associated ends of said casing to close the ends thereof.
Claim 9
Dependent Claim
123 words
The combination set forth in claim 1 in which said bladder comprises a cup-shaped portion of resilient material having end walls adapted to be positioned near the closed ends of said casing and having a floor adapted to be positioned against the associated curved portion of the inner surface of said cylindrical casing, each of said bladders having a pair of rigid strips adapted to be aligned with one side of said fixed vane and said movable vane respectively, means connecting the periphery of said cup-shaped member to the outer edges of said rigid strips and a strip of resilient material connected to the inner edges of said rigid strips and to the associated portion of the end walls of said cup-shaped member.
References Cited (Backward Citations)
US2569640A
Cited
US2428619A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |