US3596669A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure ratio device
Assignee: Individual
•
Filing: 1969-07-10
•
Granted: 1971-08-03
•
Expires: 1989-07-10
Abstract
Abstract A pressure ratio device having a first pressure-responsive diaphragm exposed at opposite sides to two different control pressures is operatively connected as by cooperating links and levers to a valve member which when actuated to one position produces a first output pressure signal and when actuated to a second position produces a second output pressure signal; a second reset type of pressure-responsive diaphragm is operatively connected to the first diaphragm and at times exposed at opposite sides thereof to the same two different control pressures and at other times exposed at opposite sides thereof to only one of the control pressures; the second reset diaphragm thereby functioning to develop a controlled hysteresis within the overall system thereby requiring a greater force to be exerted on the first diaphragm to move the valve member to the first position as compared to the force exerted on the first diaphragm required to move the valve member to its second position.
Inventors
- 👤 Julius Alberani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:15
CPC Classifications
F; F04; F04D; F04D27/00; F04D27/02; F04D27/0207; Y; Y10; Y10T; Y10T137/00; Y10T137/1842; Y10T137/1939; Y10T137/2012; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/86622; Y10T137/8663
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
265 words
A pressure ratio device, comprising a housing, first pressure-responsive means having first and second operating positions, said first pressure-responsive means being situated in said housing and exposed to first and second fluid control pressures for creating an actuating pressure differential thereacross, second pressure-responsive means operatively connected to said first pressure-responsive means and exposed to one of said control pressures, means for producing an output signal operatively connected to said first pressure-responsive means and effective for producing a first output signal when said first pressure-responsive means is moved to said first operating position and effective for producing a second output signal when said first pressure-responsive means is moved to said second operating position, said second pressure-responsive means being effective to move said first pressure-responsive means to said first operating position when said actuating pressure differential attains a first predetermined magnitude, third pressure-responsive reset means operatively connected to said first pressure-responsive means, said pressure-responsive reset means being exposed to at least one of said fluid control pressures and effective for producing a controlled hysteresis with respect to said first pressure-responsive means so as to thereby require said actuating pressure differentiation to be of a second predetermined magnitude before said first pressureresponsive means will move to said second operating position, said first pressure-responsive means comprising a first diaphragm assembly, said second pressure-responsive means comprising an evacuated bellows assembly, said third pressure-responsive reset means comprising a second diaphragm assembly having an effective pressure area less than the effective pressure area of said first diaphragm assembly, and first lever means operatively interconnecting said bellow assembly and said first diaphragm assembly.
Claim 2
Dependent Claim
265 words
A pressure ratio device, comprising a housing, first pressure-responsive means having first and second operating positions, said first pressure-responsive means being situated in said housing and exposed to first and second fluid control pressures for creating an actuating pressure differential thereacross, second pressure-responsive means operatively connected to said first pressure-responsive means and exposed to one of said control pressures, means for producing an output signal operatively connected to said first pressure-responsive means and effective for producing a first output signal when said first pressure-responsive means is moved to said first operating position and effective for producing a second output signal when said first pressure-responsive means is moved to said second operating position, said second pressure-responsive means being effective to move said first pressure-responsive means to said first operating position when said actuating pressure differential attains a first predetermined magnitude, third pressure-responsive reset means operatively connected to said first pressure-responsive means, said pressure-responsive reset means being exposed to at least one of said fluid control pressures and effective for producing a controlled hysteresis with respect to said first pressure-responsive means so as to thereby require said actuating pressure differentiation to be of a second predetermined magnitude before said first pressureresponsive means will move to said second operating position, said first pressure-responsive means comprising a first diaphragm assembly, said second pressure-responsive means comprising an evacuated bellows assembly, said third pressure-responsive reset means comprising a second diaphragm assembly having an effective pressure area less than the effective pressure area of said first diaphragm assembly, and first lever means operatively interconnecting said bellow assembly and said first diaphragm assembly.
Claim 3
Dependent Claim
158 words
A pressure ratio device according to claim 1 wherein there is additionally provided second lever means operatively interconnecting said second diaphragm assembly and said first diaphragm assembly, wherein said means for producing an output signal comprises a valve assembly having a valve member positionable in either of at least two operating positions and including an outlet, said valve member when in a first of said two positions being effective to complete communication between a source of relatively low fluid pressure and said outlet to thereby produce said first output signal, said valve member also being effective when in a second of said two positions to complete communication between a source of relatively high fluid pressure and said outlet to thereby produce said second output signal, and including additional lever means operatively interconnecting said valve member and said first diaphragm assembly for enabling said first diaphragm assembly to move said valve member to said first and said operating positions.
Claim 4
Dependent Claim
208 words
A pressure ratio device according to claim 1, wherein said first diaphragm assembly is situated within said housing as to define first and second variable but distinct pressure chambers on opposite sides of first diaphragm assembly, said first chamber being adapted for communication thereto of said first control pressure and said second pressure chamber being adapted for communication thereto of said second control pressure, wherein said evacuated bellows assembly is situated within said first pressure chamber, said first lever means is situated within said first pressure chambers, wherein said third pressure-responsive reset means is situated within said housing as to have one side thereof continually expand to the pressure within said second pressure chamber while the other side thereof Is continually exposed to the pressure within a third pressure chamber, including second lever means situated within said second chamber operatively interconnecting said first diaphragm assembly and said second diaphragm assembly, and valving means responsive to the presence of either said first or second output signals for in accordance therewith applying a pressure to said third chamber equivalent to said second control pressure or applying to said third chamber a pressure of a magnitude substantially less than the magnitude substantially less than the magnitude of said second control pressure.
Claim 5
Dependent Claim
185 words
A pressure ratio device according to claim 3 wherein said valving means comprises a valve member positionable in either of two operating positions, a first valve seat for determining a first of said two operating positions, a second valve seat for determining a second of said two operating positions, a valve outlet port, outlet conduit means communicating between said outlet port and said third pressure chamber, a first inlet communicating between a source of said first control pressure and said first valve seat, a second inlet communicating between a source of said second control pressure and said second valve seat, a pressure responsive actuator normally resiliently biased as to operatively engage and move said valve member against said second seat to thereby prevent communication of said second control pressure to said outlet port and simultaneously complete communication between said first control pressure and said outlet port, and additional resilient means effective for at times moving said valve member against said first valve seat to terminate said communication of said first control pressure and complete the communication of said second control pressure to said outlet port.
Claim 6
Dependent Claim
74 words
A pressure ratio device according to claim 1 including output signal responsive valving means for directing one of said first and second control pressures to opposite sides of said pressure responsive reset means when one of said first and second output signals is produced and for directing said first and second control pressures to opposite sides of said pressure responsive reset means when the other of said first and second output signals is produced.
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) | 1974-08-02 | 1975-02-01 | 1975-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-02 | 1979-02-01 | 1979-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-02 | 1983-02-01 | 1983-08-03 | $7700.00 | Window Closed / Lapsed |