Patent US3736960A successfully refreshed from Google Patents.
US3736960A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Digital valve
Assignee: Elsag Bailey Inc
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Filing: 1971-05-24
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Granted: 1973-06-05
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Expires: 1991-05-24
Abstract
Abstract A snap-acting, fluid amplifying valve having an input pressure chamber actuating a spring loaded diaphragm. Depending on whether the input pressure is higher or lower than a preset level, the diaphragm, respectively, expands or contracts to restrict or relive a nozzle assembly mounted on a slidable piston, within the body of the valve, causing the piston to act in a digital manner. This digital action results from the positive feedback of pressure from the nozzle restriction to the driving side of the piston which forces the piston and nozzle to move farther in the direction of initiated motion. The slidable piston is rigidly connected to a second piston which alternately seals either a supply pressure port or a vent port of the outlet chamber and, in this way, a digital signal of supply pressure is obtained. The spring loading of the diaphragm is determined of nozzle restriction and consequently digital action occurs at pressure levels preset by the stiffness of the spring used.
Inventors
- 👤 K Cohen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:42
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/12; F16K31/36; F16K31/38; F16K31/383; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/86582; Y10T137/86622; Y10T137/8663
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
221 words
A snap-acting, fluid amplifying valve comprising: a pressure housing having a supply chamber, a driving chamber, a venting chamber and a signal input chamber; a piston assembly slidably positioned in said housing between the supply chamber and the venting chamber, said piston assembly including means for sealing the supply chamber to cut off the output signal therefrom; means, responsive to the pressure level in the input signal chamber, for pressurizing the driving chamber to drive said piston assembly so that the seal of said sealing means with the supply chamber is broken and the output signal therefrom is turned on; wherein said input chamber is sealed from said venting chamber by a diaphragm assembly responsive to the pressure in said input chamber; including a vent passageway open to the outside of said pressure housing and an output chamber open to said vent passageway when the output signal is cut off from said supply chamber to provide a vented output signal thereby; and wherein said piSton assembly includes a first piston slidably positioned between said venting chamber and said driving chamber, a second piston located in said output chamber and a connecting stem slidably positioned through part of said vent passageway and extending to join said first and second piston to provide that said first and second piston slide as an assembly.
Claim 2
Dependent Claim
221 words
A snap-acting, fluid amplifying valve comprising: a pressure housing having a supply chamber, a driving chamber, a venting chamber and a signal input chamber; a piston assembly slidably positioned in said housing between the supply chamber and the venting chamber, said piston assembly including means for sealing the supply chamber to cut off the output signal therefrom; means, responsive to the pressure level in the input signal chamber, for pressurizing the driving chamber to drive said piston assembly so that the seal of said sealing means with the supply chamber is broken and the output signal therefrom is turned on; wherein said input chamber is sealed from said venting chamber by a diaphragm assembly responsive to the pressure in said input chamber; including a vent passageway open to the outside of said pressure housing and an output chamber open to said vent passageway when the output signal is cut off from said supply chamber to provide a vented output signal thereby; and wherein said piSton assembly includes a first piston slidably positioned between said venting chamber and said driving chamber, a second piston located in said output chamber and a connecting stem slidably positioned through part of said vent passageway and extending to join said first and second piston to provide that said first and second piston slide as an assembly.
Claim 3
Dependent Claim
111 words
A snap-acting, fluid amplifying valve as set forth in claim 1 wherein said means for pressurizing the driving chamber includes: a nozzle located on said first piston facing said diaphragm assembly to provide communication between said driving chamber and said venting chamber therethrough; first spring means for retaining said piston assembly in a position sealing said supply chamber; below a preset pressure level in said driving chamber; second spring means regulating the motion of said diaphragm assembly to restrict said vent nozzle and pressurize said driving chamber thereby to co-ordinate the input signal level to driving chamber pressure required to break the seal of said piston assembly to said supply chamber.
Claim 4
Dependent Claim
60 words
A snap-acting fluid amplifying valve as set forth in claim 2 wherein said first piston has a groove with an O-ring therein around the periphery of said first piston rolling inside the groove and along the wall of the driving chamber of said pressure housing during movement of said piston assembly to seal said driving chamber from said venting chamber.
Claim 5
Dependent Claim
56 words
A snap-acting fluid amplifying valve as set forth in claim 3 wherein said connecting stem has a groove with an O-ring therein around the periphery of said stem rolling inside the groove and along the wall of said vent passageway with any movement of said piston assembly to seal said driving chamber from said vent passageway.
Claim 6
Dependent Claim
31 words
A snap-acting fluid amplifying valve as set forth in claim 4 including means, in said pressure housing for connecting said supply chamber and said driving chamber to a common supply pressure.
Claim 7
Dependent Claim
40 words
A snap-acting fluid amplifying valve as set forth in claim 5 wherein said means for sealing the supply chamber include a seal located on the face of said second piston suitable for sealing said output chamber from said supply chamber.
Claim 8
Dependent Claim
225 words
A snap-acting, fluid amplifying valve comprising: a pressure housing having a supply chamber, an output chamber, a driving chamber, a venting chamber, a vent passageway open to atmosphere, and a signal input chamber; a piston assembly slidably positioned in said housing between the supply chamber and the venting chamber, said piston assembly including means for sealing the vent passageway to prevent venting the output chamber therethrough; means, responsive to the pressure level in the input signal chamber, for relieving the driving chamber to drive said piston assembly to move so that the seal of said sealing means with the vent passageway is broken and the output chamber is vented thereby; wherein said input chamber is sealed from said venting chamber by a diaphragm assembly responsive to the pressure in said input chamber; and wherein said means for pressurizing the driving chamber includes: a nozzle located on said piston assembly facing said diaphragm assembly to provide communication between said driving chamber and said venting chamber therethrough; first spring means for driving said piston assembly away from a position sealing said vent passageway; second spring means regulating the motion of said diaphragm assembly to relieve said vent nozzle and relieve said driving chamber thereby to co-ordinate the input signal level to driving chamber pressure required to break the seal of said piston assembly to said vent passageway.
Claim 9
Dependent Claim
225 words
A snap-acting, fluid amplifying valve comprising: a pressure housing having a supply chamber, an output chamber, a driving chamber, a venting chamber, a vent passageway open to atmosphere, and a signal input chamber; a piston assembly slidably positioned in said housing between the supply chamber and the venting chamber, said piston assembly including means for sealing the vent passageway to prevent venting the output chamber therethrough; means, responsive to the pressure level in the input signal chamber, for relieving the driving chamber to drive said piston assembly to move so that the seal of said sealing means with the vent passageway is broken and the output chamber is vented thereby; wherein said input chamber is sealed from said venting chamber by a diaphragm assembly responsive to the pressure in said input chamber; and wherein said means for pressurizing the driving chamber includes: a nozzle located on said piston assembly facing said diaphragm assembly to provide communication between said driving chamber and said venting chamber therethrough; first spring means for driving said piston assembly away from a position sealing said vent passageway; second spring means regulating the motion of said diaphragm assembly to relieve said vent nozzle and relieve said driving chamber thereby to co-ordinate the input signal level to driving chamber pressure required to break the seal of said piston assembly to said vent passageway.
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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) | 1976-06-04 | 1976-12-04 | 1977-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-04 | 1980-12-04 | 1981-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-04 | 1984-12-04 | 1985-06-05 | $7700.00 | Window Closed / Lapsed |