US3691906A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pneumatically operated actuator
Assignee: Robertshaw Controls Co
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Filing: 1970-05-04
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Granted: 1972-09-19
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Expires: 1990-05-04
Abstract
Abstract A pneumatically actuated operator for altering the stresses in a piezoelectric crystal means for spark igniting purposes and the like, the actuator having a movable wall that cooperates with a housing to define a chamber therebetween. The actuator has a first passage provided with a valve seat leading to the chamber and is adapted to be interconnected to a pneumatic source. The actuator has a second passage provided with a valve seat leading to the chamber and is adapted to be interconnected to the atmosphere. A single valve member is movably carried by the housing for opening the valve seat of the first passage and closing the valve seat of the second passage when the movable wall is in a predetermined deactuated stroke position thereof. The single valve member is adapted to close the valve seat of the first passage and open the valve seat of the second passage when the movable wall is in a predetermined actuated stroke position thereof whereby the movable wall is cycled between the predetermined positions thereof as long as the pneumatic source is interconnected to a chamber.
Inventors
- 👤 Kenneth G Kreuter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:32
CPC Classifications
F; F23; F23Q; F23Q3/00; F23Q3/002; F15; F15B; F15B21/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
194 words
A pneumatically operated actuator comprising a housing means carrying a movable wall that cooperates therewith to define a chamber therebetween, said actuator having a first passage means leading to said chamber and being adapted to be interconnected to a pneumatic source, said actuator having a second passage means leading to said chamber and being adapted to be interconnected to the atmosphere, a single valve member movably carried by said housing means for opening said first passage means and closing said second passage means when said movable wall is in a predetermined deactuated stroke position thereof and for closing said first passage means and opening said second passage means when said movable wall is in a predetermined actuated stroke position thereof whereby said movable wall is cycled between said predetermined positions thereof as long as said source is interconnected to said chamber, said first passage means passing through said movable wall and said second passage passing through said housing, and a spring means carried by said housing means and being operatively interconnected to said valve member to tend to move said valve member to close said second passage means and open said first passage means.
Claim 2
Dependent Claim
194 words
A pneumatically operated actuator comprising a housing means carrying a movable wall that cooperates therewith to define a chamber therebetween, said actuator having a first passage means leading to said chamber and being adapted to be interconnected to a pneumatic source, said actuator having a second passage means leading to said chamber and being adapted to be interconnected to the atmosphere, a single valve member movably carried by said housing means for opening said first passage means and closing said second passage means when said movable wall is in a predetermined deactuated stroke position thereof and for closing said first passage means and opening said second passage means when said movable wall is in a predetermined actuated stroke position thereof whereby said movable wall is cycled between said predetermined positions thereof as long as said source is interconnected to said chamber, said first passage means passing through said movable wall and said second passage passing through said housing, and a spring means carried by said housing means and being operatively interconnected to said valve member to tend to move said valve member to close said second passage means and open said first passage means.
Claim 3
Dependent Claim
277 words
A pneumatically operated actuator comprising a housing means carrying a movable wall that cooperates therewith to define a chamber therebetween, said actuator having a first passage means leading to said chamber and being adapted to be interconnected to a pneumatic source, said actuator having a second passage means leading to said chamber and being adapted to be interconnected to the atmosphere, and a single valve member movably carried by said housing means for opening said first passage means and closing said second passage means when said movable wall is in a predetermined deactuated stroke position thereof and for closing said first passage means and opening said second passage means when said movable wall is in a predetermined actuated stroke position thereof whereby said movable wall is cycled between said predetermined positions thereof as long as said source is interconnected to said chamber, said first passage means passing through said movable wall and said second passage passing through said housing, said first passage means terminating at a first valve seat carried by said movable wall and projecting into said chamber, said valve member being flexible, said housing means having a second valve seat at the terminal end of said second passage means and projecting into said chamber so as to face said first valve seat whereby said valve member is movable between said seats, said first and second valve seats being annular and said first valve seat having a greater diameter than the diameter of said second valve seat whereby said valve member is adapted to be bowed away from seating engagement with said second valve seat when said first valve seat also seats against said valve member.
Claim 4
Dependent Claim
277 words
A pneumatically operated actuator comprising a housing means carrying a movable wall that cooperates therewith to define a chamber therebetween, said actuator having a first passage means leading to said chamber and being adapted to be interconnected to a pneumatic source, said actuator having a second passage means leading to said chamber and being adapted to be interconnected to the atmosphere, and a single valve member movably carried by said housing means for opening said first passage means and closing said second passage means when said movable wall is in a predetermined deactuated stroke position thereof and for closing said first passage means and opening said second passage means when said movable wall is in a predetermined actuated stroke position thereof whereby said movable wall is cycled between said predetermined positions thereof as long as said source is interconnected to said chamber, said first passage means passing through said movable wall and said second passage passing through said housing, said first passage means terminating at a first valve seat carried by said movable wall and projecting into said chamber, said valve member being flexible, said housing means having a second valve seat at the terminal end of said second passage means and projecting into said chamber so as to face said first valve seat whereby said valve member is movable between said seats, said first and second valve seats being annular and said first valve seat having a greater diameter than the diameter of said second valve seat whereby said valve member is adapted to be bowed away from seating engagement with said second valve seat when said first valve seat also seats against said valve member.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-19 | 1976-03-20 | 1976-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-19 | 1980-03-20 | 1980-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-19 | 1984-03-20 | 1984-09-19 | $7700.00 | Window Closed / Lapsed |