Patent US4799034A successfully refreshed from Google Patents.
Patent US3731597A successfully refreshed from Google Patents.
US3731597A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary operator
Assignee: ARCAS CO
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Filing: 1972-02-16
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Granted: 1973-05-08
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Expires: 1992-02-16
Abstract
Abstract A rotary operator for operating a valve or the like by rotating same a partial revolution in either rotational direction, wherein the operator has a pair of self-centering floating pistons movable by an arcuately curved piston rod in a tubular insert assembly mounted in a housing, and wherein each piston has a double O-ring seal which prevents misalignment and resultant binding of pistons during arcuate floating movement controlled by fluid pressure introduced into the insert assembly. The tubular insert assembly is made from conventional tubing which is bent to an arcuate shape so as to eliminate machining and other relatively expensive manufacturing costs.
Inventors
- 👤 G Payne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:27
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/12; F15; F15B; F15B15/00; F15B15/08; F15B15/12; F15B15/125
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
147 words
A rotary operator for a valve or the like, comprising a housing having a circular operating chamber internally thereof; a tubular insert assembly including a single metal tube bent to an arcuate shape and disposed in a portion of said operating chamber to form two arcuate piston chambers; a divider plate disposed in and fixed to the bore of said tube at substantially the mid-point thereof for dividing said tube into said two arcuate piston chambers; an arcuate piston rod disposed in said operating chamber and having its ends positioned in said arcuate piston chambers formed by said tube; a piston having annular seal means therewith disposed at each of said ends of said piston rod but separate therefrom and having no connection therewith; and fluid pressure means for alternately applying fluid pressure to each of said pistons for moving same and said piston rod arcuately therewith.
Claim 2
Dependent Claim
147 words
A rotary operator for a valve or the like, comprising a housing having a circular operating chamber internally thereof; a tubular insert assembly including a single metal tube bent to an arcuate shape and disposed in a portion of said operating chamber to form two arcuate piston chambers; a divider plate disposed in and fixed to the bore of said tube at substantially the mid-point thereof for dividing said tube into said two arcuate piston chambers; an arcuate piston rod disposed in said operating chamber and having its ends positioned in said arcuate piston chambers formed by said tube; a piston having annular seal means therewith disposed at each of said ends of said piston rod but separate therefrom and having no connection therewith; and fluid pressure means for alternately applying fluid pressure to each of said pistons for moving same and said piston rod arcuately therewith.
Claim 3
Dependent Claim
33 words
The structure set forth in claim 1, wherein: said fluid pressure means includes a pipe disposed on each side of said divider and communicating with each of said piston chambers in said tube.
Claim 4
Dependent Claim
21 words
The structure set forth in claim 1, wherein: said tube forms a liner for the major portion of said operating chamber.
Claim 5
Dependent Claim
64 words
The structure set forth in claim 1, wherein said annular seal means on each of said pistons includes: a pair of seal rings spaced from each other and providing the only contact by each piston with the inner surface of said piston chamber in which it moves for preventing each piston from cocking as it moves in the arcuate path defined by said tube.
Claim 6
Dependent Claim
23 words
The structure set forth in claim 4, wherein: each of said seal rings is an O-ring formed of rubber or a rubber-like material.
Claim 7
Dependent Claim
45 words
The structure set forth in claim 2, wherein: said housing is formed in two halves split so as to provide a semi-cylindrical annular groove in each which join together when said two halves are assembled to form a cylindrical annular groove defining said operating chamber.
References Cited (Backward Citations)
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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) | 1976-05-07 | 1976-11-06 | 1977-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-07 | 1980-11-06 | 1981-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-07 | 1984-11-06 | 1985-05-08 | $7700.00 | Window Closed / Lapsed |