US3915070A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for indicating the position of the piston of a fluidic actuator
Assignee: Paul Wurth SA
•
Filing: 1973-10-19
•
Granted: 1975-10-28
•
Expires: 1993-10-19
Abstract
Abstract Apparatus for providing an indication of the position of the piston within a fluidic actuator. The apparatus comprises means positioned within the actuator cylinder and coupled to the piston for converting longitudinal motion of the piston to rotary motion which is transmitted out of the cylinder to a suitable indicator.
Inventors
- 👤 Pierre H Mailliet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:56
CPC Classifications
F; F15; F15B; F15B15/00; F15B15/20; F15B15/28; F15B15/2815; F15B15/2823
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
170 words
Apparatus for determining the position of a piston of a fluid operated actuator, the piSton being movable longitudinally within a cylinder and being provided with a recess in a first end thereof, the position determining apparatus comprising: elongated gear means extending into the recess in the actuator piston; means mounting said gear means for rotation, said mounting means being at least in part supported from a wall of the actuator cylinder which faces the piston first end; drive means mounted on the actuator piston for movement therewith, said drive means engaging said gear means, longitudinal motion of the actuator piston with respect to said gear means being coupled to said gear means by said drive means and producing rotation of said gear means; means for transmitting the rotational motion of said gear means through said actuator cylinder wall, said motion transmitting means being coupled to said gear means; and means positioned exteriorly of the actuator cylinder and connected to said transmitting means for providing an indication of piston longitudinal position.
Claim 2
Dependent Claim
170 words
Apparatus for determining the position of a piston of a fluid operated actuator, the piSton being movable longitudinally within a cylinder and being provided with a recess in a first end thereof, the position determining apparatus comprising: elongated gear means extending into the recess in the actuator piston; means mounting said gear means for rotation, said mounting means being at least in part supported from a wall of the actuator cylinder which faces the piston first end; drive means mounted on the actuator piston for movement therewith, said drive means engaging said gear means, longitudinal motion of the actuator piston with respect to said gear means being coupled to said gear means by said drive means and producing rotation of said gear means; means for transmitting the rotational motion of said gear means through said actuator cylinder wall, said motion transmitting means being coupled to said gear means; and means positioned exteriorly of the actuator cylinder and connected to said transmitting means for providing an indication of piston longitudinal position.
Claim 3
Dependent Claim
42 words
The apparatus of claim 1 wherein said means mounting said gear means for rotation comprises: bearing means supported by said actuator cylinder wall; and means for preventing leakage of fluid between the interior and exterior of said cylinder about said bearing means.
Claim 4
Dependent Claim
33 words
The apparatus of claim 1 further comprising: means for preventing rotation of said gear means in response to rotational movements within the actuator, said rotation preventing means interconnecting said drive and mounting means.
Claim 5
Dependent Claim
35 words
The apparatus of claim 3 wherein said rotation preventing means comprises: a supporting member extending generally coaxially of said gear means, said supporting member limiting said drive means to longitudinal movement with the actuator piston.
Claim 6
Dependent Claim
54 words
The apparatus of claim 4 wherein said drive means comprises: ring means mounted for longitudinal movement with the actuator piston, said ring means being provided with at least a first passage which engages said elongated gear means, said ring means further being provided with at least a first projection which engages said supporting member.
Claim 7
Dependent Claim
42 words
The apparatus of claim 5 wherein said ring means comprises: a nut, said nut defining a pair of generally coaxial passages therethrough, the inner of said passages engaging said elongated gear means and the outer of said passages receiving said supporting member.
Claim 8
Dependent Claim
13 words
The apparatus of claim 6 wherein said supporting member comprises: a slotted tube.
Claim 9
Dependent Claim
42 words
The apparatus of claim 7 wherein said means mounting said gear means for rotation comprises: bearing means supported by said actuator cylinder wall; and means for preventing leakage of fluid between the interior and exterior of said cylinder about said bearing means.
References Cited (Backward Citations)
US243450A
Cited
US2704047A
Cited
US2936737A
Cited
US3077179A
Cited
US3186311A
Cited
US3386340A
Cited
US3633534A
Cited
US3766831A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-27 | 1979-04-28 | 1979-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-27 | 1983-04-28 | 1983-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-27 | 1987-04-28 | 1987-10-28 | $7700.00 | Window Closed / Lapsed |