Patent US4094340A successfully refreshed from Google Patents.
US4094340A
Expired / Lapsed
US
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Assignee: BWB Controls Inc
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Filing: 1976-12-13
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Granted: 1978-06-13
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Expires: 1996-12-13
Abstract
Abstract Device for providing a first signal to an actuator as a function of a further signal received from a further member, wherein on said device blocking said first signal, means other than said further signal are required to cause unblocking of said first signal.
Inventors
- 👤 Ned A. Bergeron
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:29
CPC Classifications
F; F16; F16K; F16K17/00; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86485; Y10T137/86493; Y10T137/86574; Y10T137/86582; Y10T137/86622; Y10T137/8663
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
192 words
A device for controlling a first fluid signal from an actuator fluid supply to an actuator as a function of a further fluid signal received from a further fluid supply, comprising: an axially bored housing; said housing including further fluid signal inlet means communicating with said further fluid supply, first fluid signal outlet means communicating with said actuator, and first fluid signal inlet means; slide valve member movable within said housing bore from a first position allowing communication between said actuator fluid supply and said actuator, to a second position blocking communication between said actuator fluid supply and said actuator; and means preventing a fluid signal through said further fluid signal inlet means from causing said slide valve member to move from said second position to said first position, said preventing means including a) means for causing said fluid signal through said further fluid signal inlet to bias said slide valve member toward said second position whenever said slide valve member is in said second position, and b) means for causing said fluid signal from said actuator fluid supply to bias said slide valve member toward said second position at all times.
Claim 2
Independent Claim
192 words
A device for controlling a first fluid signal from an actuator fluid supply to an actuator as a function of a further fluid signal received from a further fluid supply, comprising: an axially bored housing; said housing including further fluid signal inlet means communicating with said further fluid supply, first fluid signal outlet means communicating with said actuator, and first fluid signal inlet means; slide valve member movable within said housing bore from a first position allowing communication between said actuator fluid supply and said actuator, to a second position blocking communication between said actuator fluid supply and said actuator; and means preventing a fluid signal through said further fluid signal inlet means from causing said slide valve member to move from said second position to said first position, said preventing means including a) means for causing said fluid signal through said further fluid signal inlet to bias said slide valve member toward said second position whenever said slide valve member is in said second position, and b) means for causing said fluid signal from said actuator fluid supply to bias said slide valve member toward said second position at all times.
Claim 3
Dependent Claim
27 words
The device of claim 1, and including means exterior of said housing for effecting movement of said slide valve member from said second to said first position.
Claim 4
Dependent Claim
52 words
The device of claim 2, wherein said preventing means includes first larger and a second smaller piston on said slide valve member, each said piston being in fluid communication with said further fluid signal inlet means and sealingly engaged with said bore when said slide valve member is in said second position.
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) | 1981-06-12 | 1981-12-12 | 1982-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-12 | 1985-12-12 | 1986-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-12 | 1989-12-12 | 1990-06-13 | $7700.00 | Window Closed / Lapsed |