Patent US3741247A successfully refreshed from Google Patents.
US3741247A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluidic pressure amplifier
Assignee: Automatic Switch Co
•
Filing: 1971-12-10
•
Granted: 1973-06-26
•
Expires: 1991-12-10
Abstract
Abstract A fluidic pressure amplifier comprising a body having a logic port for receiving a fluidic signal from a fluidic logic control circuit, an inlet port for connection to a source of fluid pressure higher than the pressure of the logic signal, an outlet port for connection to an interface device which controls fluid at a still higher working pressure, and an exhaust port. The body also includes a bore with which the inlet, outlet, and exhaust ports communicate, a valve seat between the inlet port and one end of the bore, and an opening in the bore wall communicating with the exhaust port. A unitary valve element includes a spool snugly but slidably arranged within the bore, a valve disk axially spaced from the spool, and a reduced diameter rod interconnecting the spool and disk. A diaphragm is connected to the end of the spool opposite the disk and is exposed to pressure at the logic port. This latter pressure urges the spool into a position wherein it covers the opening in the bore wall and separates the disk from the valve seat, whereby the inlet and outlet ports communicate, but not the outlet and exhaust ports. Pressure at the inlet port urges the spool into a position wherein it uncovers the opening and the disk engages the valve seat, whereby the outlet and exhaust ports communicate, but not the inlet and outlet ports.
Inventors
- 👤 H Kaemmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:42
CPC Classifications
F; F15; F15C; F15C3/00; F15C3/04; F16; F16K; F16K11/00; F16K11/02; F16K11/022; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/86622; Y10T137/8663
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
250 words
A fluidic pressure amplifier having no springs for use between a fluidic logic control circuit which yields a low pressure output signal and an interface device which controls the flow of fluid at a higher working pressure, consisting of: a. a body having a stationary valve seat, b. an inlet port in said body adapted to be connected to a source of fluid at an intermediate pressure between the fluidic output signal pressure and the working pressure, c. an outlet porT in said body adapted to be connected to the interface device, d. a logic port in said body adapted to receive the fluidic output signal, e. an exhaust port in said body, f. a unitary element movable within said body, said element being responsive in the absence of said low pressure output signal, to the intermediate pressure at said inlet port for engaging the stationary seat to prevent communication between said inlet and outlet ports while permitting communication between said outlet and exhaust ports, and g. means responsive to the fluidic output signal pressure at said logic port for moving said element out of engagement with the stationary seat to prevent communication between said outlet port and said exhaust port while permitting communication between said inlet port and outlet port, whereby the position of said element is controlled by the intermediate pressure and the fluidic output signal to provide an intermediate pressure output signal at the output port when the low pressure signal is applied to the logic port.
Claim 2
Dependent Claim
250 words
A fluidic pressure amplifier having no springs for use between a fluidic logic control circuit which yields a low pressure output signal and an interface device which controls the flow of fluid at a higher working pressure, consisting of: a. a body having a stationary valve seat, b. an inlet port in said body adapted to be connected to a source of fluid at an intermediate pressure between the fluidic output signal pressure and the working pressure, c. an outlet porT in said body adapted to be connected to the interface device, d. a logic port in said body adapted to receive the fluidic output signal, e. an exhaust port in said body, f. a unitary element movable within said body, said element being responsive in the absence of said low pressure output signal, to the intermediate pressure at said inlet port for engaging the stationary seat to prevent communication between said inlet and outlet ports while permitting communication between said outlet and exhaust ports, and g. means responsive to the fluidic output signal pressure at said logic port for moving said element out of engagement with the stationary seat to prevent communication between said outlet port and said exhaust port while permitting communication between said inlet port and outlet port, whereby the position of said element is controlled by the intermediate pressure and the fluidic output signal to provide an intermediate pressure output signal at the output port when the low pressure signal is applied to the logic port.
Claim 3
Dependent Claim
30 words
A fluidic pressure amplifier as defined in claim 1 wherein said responsive means (g) includes a diaphragm exposed to pressure at said logic port and operatively connected to said element.
Claim 4
Dependent Claim
51 words
A fluidic pressure amplifier as defined in claim 1 wherein said body includes a bore communicating with said inlet port, and said element includes a spool section snugly but slidably arranged within said bore, said spool section being movable axially within said bore by the intermediate pressure at said inlet port.
Claim 5
Dependent Claim
76 words
A fluidic pressure amplifier as defined in claim 3 wherein said outlet port communicates with said bore, wherein the valve seat is located between said bore and inlet port, and wherein the element includes a valve disk section cooperable with said valve seat, intermediate pressure at said inlet port urging movement of said spool section in a direction which causes said disk to engage said seat and thereby prevent communication between said inlet and outlet ports.
Claim 6
Dependent Claim
58 words
A fluidic pressure amplifier as defined in claim 4 wherein the element includes a reduced diameter rod extending axially within said bore and interconnecting said spool section and said disk section, the annular region of said bore surrounding said rod constituting a flow passage through which said outlet and exhaust ports communicate when said disk engages said seat.
Claim 7
Dependent Claim
96 words
A fluidic pressure amplifier as defined in claim 5 wherein said body includes a diaphragm chamber communicating with the end of said bore opposite to the end with which said valve seat communicates, said chamber also communicating with said logic port, and said responsive means (g) includes a diaphragm within said chamber connected to the end of said spool section opposite the end to which said valve disk section is connected, said diaphragm responding to pressure at said logic port for urging said spool in a direction tending to separate said disk section and valve seat.
Claim 8
Dependent Claim
65 words
A fluidic pressure amplifier as defined in claim 6 including an opening in the wall of said bore through which said exhaust port can communicate with said annular region of said bore, said spool section closing said opening when said disk section and valve seat separate and said spool section uncovering at least a portion of said opening when said disk engages said valve seat.
Claim 9
Dependent Claim
64 words
A fluidic pressure amplifier as defined in claim 3 wherein said responsive means (g) includes a diaphragm exposed to pressure at said logic port and operatively connected to said spool section, said diaphragm being responsive to pressure at said logic port for urging said spool section in a direction opposite to the direction in which pressure at said inlet port urges said spool section.
Claim 10
Dependent Claim
130 words
A fluidic pressure amplifier as defined in claim 8 wherein the valve seat is located between said bore and inlet port, wherein the member includes a valve disk section connected to said spool section and cooperable with said valve seat, and includiNg an opening in the wall of said bore communicating with said exhaust port, intermediate pressure at said inlet port urging movement of said spool section in a direction which causes said disk section to engage said seat and said spool section to at least partially uncover said opening, and a fluidic output signal at said logic port urging movement of said diaphragm and hence said spool section in a direction which causes said disk section and valve seat to separate and said spool section to cover said opening.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-25 | 1976-12-25 | 1977-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-25 | 1980-12-25 | 1981-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-25 | 1984-12-25 | 1985-06-26 | $7700.00 | Window Closed / Lapsed |