US3750535A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary actuator
Assignee: CHUKYO GIJUTSU CENTER KK
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Filing: 1971-10-01
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Granted: 1973-08-07
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Expires: 1991-10-01
Abstract
Abstract In a rotary actuator, seal material of, for example, synthetic resin, is provided on internal periphery of the cylinder and/or external periphery of the shaft, the seal material is axially compressed by a pair of end covers closing the ends of the cylinder, and square packings are provided to the movable and stationary vanes. The seal material and the square packings cooperatively form prefect right angles at corners of contact surfaces within the cylinder to prevent internal leakage of fluid within the cylinder.
Inventors
- 👤 Y Higuchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:45
CPC Classifications
F; F15; F15B; F15B15/00; F15B15/08; F15B15/12; B; B60; B60G; B60G2202/00; B60G2202/20; B60G2202/22
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
115 words
A rotary actuator which comprises in combination, a cylinder, end covers disposed on opposite open portions of said cylinder, a rotary shaft supported by said end covers and disposed through said cylinder, a stationary vane and a movable vane disposed relative said shaft and within the cylinder, seal material composed of synthetic resin and mounted on the inner periphery of said cylinder and on the external periphery of said shaft, said seal material having a normal length a little greater than that of said cylinder and having squared edge portions, said seal material being compressed in the axial direction by the end covers, and square packings disposed on said stationary vane and said movable vane.
Claim 2
Dependent Claim
115 words
A rotary actuator which comprises in combination, a cylinder, end covers disposed on opposite open portions of said cylinder, a rotary shaft supported by said end covers and disposed through said cylinder, a stationary vane and a movable vane disposed relative said shaft and within the cylinder, seal material composed of synthetic resin and mounted on the inner periphery of said cylinder and on the external periphery of said shaft, said seal material having a normal length a little greater than that of said cylinder and having squared edge portions, said seal material being compressed in the axial direction by the end covers, and square packings disposed on said stationary vane and said movable vane.
Claim 3
Dependent Claim
46 words
A rotary actuator as set forth in claim 1, wherein the seal materials to be mounted on the external periphery of said shaft are formed in an annular shape and are provided with holes in the axial direction for fixing said movable vane to said shaft.
Claim 4
Dependent Claim
61 words
A rotary actuator as set forth in claim 1, wherein one of said covers is fixed to said shaft, the movable vane is fixed to said one cover, a thrust bearing is mounted to the outside of the other cover, and said other cover is fastened axially through said thrust bearing by means of a nut threadably engaging with said shaft.
Claim 5
Dependent Claim
61 words
A rotary actuator as set forth in claim 1, wherein one of said covers is fixed to said shaft, the movable vane is fixed to said one cover, a thrust bearing is mounted to the outside of the other cover, and said other cover is fastened axially through said thrust bearing by means of a nut threadably engaging with said shaft.
References Cited (Backward Citations)
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US1965564A
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US2738775A
Cited
US3066654A
Cited
US3049103A
Cited
US3379100A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-06 | 1977-02-05 | 1977-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-06 | 1981-02-05 | 1981-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-06 | 1985-02-05 | 1985-08-07 | $7700.00 | Window Closed / Lapsed |