US3672260A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compressed-air actuator
Assignee: Individual
•
Filing: 1970-12-14
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Granted: 1972-06-27
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Expires: 1990-12-14
Abstract
Abstract A compressed air actuator is provided which is capable of producing a limited angular displacement of an output shaft. The actuator comprises an air tight cylinder wherein two pistons are adapted to slide in opposite directions relative to each other. Each piston is integral with a slide-block which carries a roller engaging a fork of a pivotal lever mechanically coupled to the output shaft. The slide-blocks are guided by sleeves rotatably mounted on the output shaft and by an end guide flange with antifriction packings resting on the inner wall of the cylinder. Each slide-block carries an end guide lug capable of being received in a cavity of the opposite piston when the two pistons come close to each other.
Inventors
- 👤 Jean Gachot
- 👤 Fernand Perales
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:18
CPC Classifications
F; F15; F15B; F15B15/00; F15B15/02; F15B15/06; F15B15/066; B; B60; B60S; B60S1/00; B60S1/02; B60S1/04; B60S1/06; B60S1/10; F16; F16K; F16K31/00; F16K31/12; F16K31/16; F16K31/163; F16K31/1635; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18888; Y10T74/1892
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
168 words
A compressed-air actuator for effecting a limited angular displacement of an output shaft, said actuator comprising: a leak-tight cylinder, two pistons slidable in a leak-tight manner within said cylinder in opposite directions relative to each other, a pivotal lever rotationally coupled to said output shaft and having two oppositely extending forks, a slide-block carried by each said piston, a roller carried by each slide-block and engaging one of said forks, each said slide-block having thereon a cylindrical surface having a diameter slightly smaller than that of said cylinder, and a planar surface substantially parallel to the generatrices of said cylinder and slidable over said output shaft, and at the end remote from the piston a cylindrical guide flange having a diameter substantially equal to that of the cylinder and at least one guide lug, one face of which is coplanar with said planar surface of the slide-block, each said piston having a cavity adapted to receive the guide lug of the slide block carried by the other piston.
Claim 2
Dependent Claim
168 words
A compressed-air actuator for effecting a limited angular displacement of an output shaft, said actuator comprising: a leak-tight cylinder, two pistons slidable in a leak-tight manner within said cylinder in opposite directions relative to each other, a pivotal lever rotationally coupled to said output shaft and having two oppositely extending forks, a slide-block carried by each said piston, a roller carried by each slide-block and engaging one of said forks, each said slide-block having thereon a cylindrical surface having a diameter slightly smaller than that of said cylinder, and a planar surface substantially parallel to the generatrices of said cylinder and slidable over said output shaft, and at the end remote from the piston a cylindrical guide flange having a diameter substantially equal to that of the cylinder and at least one guide lug, one face of which is coplanar with said planar surface of the slide-block, each said piston having a cavity adapted to receive the guide lug of the slide block carried by the other piston.
Claim 3
Dependent Claim
36 words
A compressed-air actuator according to claim 1, wherein the pivotal lever is constituted by a circular disc whose diameter is close to the internal diameter of the cylinder, having two diametrically opposite notches comprising said forks.
Claim 4
Dependent Claim
23 words
An actuator according to claim 1, wherein the maximum length of the pivotal lever is substantially equal to the diameter of the cylinder.
Claim 5
Dependent Claim
35 words
An actuator according to claim 1, wherein the output shaft has a central portion of polygonal cross-section which engages within a bore of similar cross-section formed at the center of symmetry of the pivotal lever.
Claim 6
Dependent Claim
54 words
An actuator according to claim 1, wherein the output shaft is provided on each side of the pivotal lever with a cylindrical section for supporting a sleeve which is adapted to rotate freely with respect to said section and against which are applied the flat faces of the two slide-blocks and their guide lugs.
Claim 7
Dependent Claim
21 words
An actuator according to claim 5, wherein the cylindrical sections of the output shaft have different diameters relative to each other.
Claim 8
Dependent Claim
32 words
An actuator according to claim 1, wherein the cylindrical flanges for guiding the slide-blocks have a diameter which is slightly smaller than that of the cylinder and are fitted with antifriction packings.
Claim 9
Dependent Claim
36 words
An actuator according to claim 1, wherein each piston is fitted with an annular seal and a resilient centering member which is located on the side remote from the pivotal lever with respect to said seal.
Claim 10
Dependent Claim
28 words
An actuator according to claim 8, wherein the centering member is constituted by a ring of plastic material which is mounted within a peripheral groove of the piston.
Claim 11
Dependent Claim
27 words
An actuator according to claim 8, wherein the centering member is constituted by a plate of circular cross-section which is mounted on the extremity of the piston.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |