US4210165A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure regulating equipment for air cushion
Assignee: TOKYO AUTOMATIC CONTROL KK
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Filing: 1978-04-19
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Granted: 1980-07-01
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Expires: 1998-04-19
Abstract
Abstract Pressure regulating equipment for an air cushion, which has a check valve, an outlet of which is connected with a large capacity air cushion such as a balancer, diecushion, etc. of a press. It also includes a pilot operated pressure regulator, an inlet of which is connected with the downstream side of said check valve and the pressure of the downstream side of which is regulated to the same pressure as the pilot air, a pilot pressure regulator giving pilot air to a pilot air receiving port of said pilot operated pressure regulator, a three way valve from which air is discharged by the pilot air and which is connected between the downstream side of said check valve and said air cushion, and a differential pressure operating valve which opens a passage from the upstream side of said pilot operated pressure regulator to a pilot air receiving port of said three way valve by differential pressure between the pilot air from said pilot pressure regulator and air pressure existing in a line between said check valve and said pilot operated pressure regulator.
Inventors
- 👤 Kentaro Kitsugi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:45
CPC Classifications
G; G05; G05D; G05D16/00; G05D16/14; G05D16/16; G05D16/163; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2544
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
210 words
Pressure regulating equipment for a large capacity air cushion, comprising: a pilot operated pressure regulator including a downstream side and a pilot air receiving port; a pilot pressure regulator being settable for a desired pilot pressure at its downstream side, said downstream side of said pilot pressure regulator being connected to said pilot air receiving port, said pilot operated pressure regulator being adapted to equalize the air pressure at said downstream side with the air pressure from said pilot pressure regulator at said pilot air receiving port; a check valve, said check valve including an inlet connected to said downstream side of said pilot operated pressure regulator and an outlet; a three way valve including a passage operable by an air pressure signal and connecting said outlet of said check valve with said air cushion; and a differential pressure operating valve having a first inlet communicating with said downstream side of said pilot operated pressure regulator and a second inlet communicating with said downstream side of said pilot pressure regulator, said differential pressure operating valve adapted to supply an air pressure signal at an outlet thereof by a pressure differential between said inlet ports, said outlet connected to said three way valve and said air pressure signal opening said passage.
Claim 2
Dependent Claim
210 words
Pressure regulating equipment for a large capacity air cushion, comprising: a pilot operated pressure regulator including a downstream side and a pilot air receiving port; a pilot pressure regulator being settable for a desired pilot pressure at its downstream side, said downstream side of said pilot pressure regulator being connected to said pilot air receiving port, said pilot operated pressure regulator being adapted to equalize the air pressure at said downstream side with the air pressure from said pilot pressure regulator at said pilot air receiving port; a check valve, said check valve including an inlet connected to said downstream side of said pilot operated pressure regulator and an outlet; a three way valve including a passage operable by an air pressure signal and connecting said outlet of said check valve with said air cushion; and a differential pressure operating valve having a first inlet communicating with said downstream side of said pilot operated pressure regulator and a second inlet communicating with said downstream side of said pilot pressure regulator, said differential pressure operating valve adapted to supply an air pressure signal at an outlet thereof by a pressure differential between said inlet ports, said outlet connected to said three way valve and said air pressure signal opening said passage.
Claim 3
Dependent Claim
76 words
Pressure regulating equipment for a large capacity air cushion as in claim 1 in which said pilot operated pressure regulator has a diaphragm, said diaphragm controlling the opening and closing of a valve positioned between an inlet passage and an outlet passage of said pilot operated pressure regulator, said diaphragm dividing an upper chamber and a lower chamber, said upper chamber connecting with said pilot air receiving port, and the lower chamber connecting said outlet passage.
Claim 4
Dependent Claim
52 words
Pressure regulator equipment for an air cushion as in claim 1 in which said pilot pressure regulator converts air pressure in that portion of said regulator connected with the upstream side of the pilot air operated pressure regulator into said set pressure, supplying said set pressure to the pilot air receiving port.
Claim 5
Dependent Claim
100 words
Pressure regulating equipment for an air cushion as in claim 1 or claim 3 in which said pilot pressure regulator has a valve, said valve opening and closing a passage between its inlet and its outlet, a diaphragm controlling said valve, a spring operating on said diaphragm, and an adjusting screw operating on said spring for adjusting the load pressure of said spring, one face of said diaphragm being pushed up by pressure in a chamber connected to an outlet flow passage of the regulator, and another face of said diaphragm being pushed down by the pressure of said spring.
Claim 6
Dependent Claim
53 words
Pressure regulating equipment for an air cushion as in claim 1 in which said differential pressure operating valve opens a passage between a third inlet and said outlet by excess pilot air pressure, and closes said passage and opens said outlet to the open air by a valve pushed up by a spring.
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) | 1983-07-01 | 1983-12-31 | 1984-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-07-01 | 1987-12-31 | 1988-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-07-01 | 1991-12-31 | 1992-07-01 | $7700.00 | Window Closed / Lapsed |