Patent US2360997A successfully refreshed from Google Patents.
Patent US3770012A successfully refreshed from Google Patents.
US3770012A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Random access selection apparatus
Assignee: University of Illinois at Urbana-Champaign
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Filing: 1973-02-05
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Granted: 1973-11-06
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Expires: 1993-02-05
Abstract
Abstract Random access information retrieval apparatus for selecting a particular item from a plurality thereof including an improved pair of x-y coordinate digitally positionable devices which are driven by a four-way control valve. A polar coordinate random access information retrieval apparatus including a rotatable recording disc having information recorded on at least one surface thereof, a transducer for detecting said information, radial positioning means for moving said transducer radially along said disc, and angular positioning means coupled to said recording disc for incrementally rotating said disc to position desired information on said disc adjacent said transducer. An improved four-way control valve including a valve housing having a pair of inlet ports for connection to a pressure source and a pair of outlet ports for connection to a load, a first control chamber communicating one of said inlet ports with one of said outlet ports, a second control chamber immediately adjacent said first chamber and communicating the other of said inlet ports with the other of said outlet ports, a diaphragm intermediate said first and second chambers and forming a common wall therebetween, and a diapragm control means for moving said diaphragm to selectively seal one of said inlet ports in said respective first and second chambers to control the fluid flow between said inlet and outlet ports.
Inventors
- 👤 R Johnson
- 👤 D Skaperdas
- 👤 D Bitzer
- 👤 L Bandy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:16
CPC Classifications
F; F15; F15B; F15B11/00; F15B11/16; F15B11/18; F15B13/00; F15B13/02; F15B13/04; F15B13/042; F15B13/043; F16; F16K; F16K11/00; F16K11/02; F16K11/022; G; G03; G03B; G03B21/00; G03B21/10; G03B21/11; G03B21/115; G03B21/116; G11; G11B; G11B5/00; G11B5/48; G11B5/54; G11B5/55; G11B5/5521; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/265; Y10T137/2668; Y10T137/2678; Y10T137/8593; Y10T137/87169; Y10T137/87193; Y10T137/87209; Y10T137/877; Y10T137/87708; Y10T137/87764; Y10T137/87772
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
119 words
A four-way control valve comprising: a valve housing having a pair of inlet ports for connection to a pressure source and a pair of out-let ports for connection to a load; a first control chamber communicating one of said inlet ports with one of said outlet ports; a second control immediately adjacent said first chamber and communicating the other of said inlet ports with the other of said outlet ports; a diaphragm intermediate said first and second chambers and forming a common wall therebetween; and a diaphragm control means for moving said diaphragm to selectively seal one of said inlet ports in said respective first and second chambers to control the fluid flow between said inlet and outlet ports.
Claim 2
Dependent Claim
119 words
A four-way control valve comprising: a valve housing having a pair of inlet ports for connection to a pressure source and a pair of out-let ports for connection to a load; a first control chamber communicating one of said inlet ports with one of said outlet ports; a second control immediately adjacent said first chamber and communicating the other of said inlet ports with the other of said outlet ports; a diaphragm intermediate said first and second chambers and forming a common wall therebetween; and a diaphragm control means for moving said diaphragm to selectively seal one of said inlet ports in said respective first and second chambers to control the fluid flow between said inlet and outlet ports.
Claim 3
Dependent Claim
38 words
A four-way control valve according to claim 1, wherein said diaphragm control means comprises selectively actuable means connected to said pair of outlet ports for effecting selective movement of said diaphragm in sealing engagement with respective inlet ports.
Claim 4
Dependent Claim
94 words
A four-way control valve according to claim 2, wherein said selectively actuable means comprises a pair of exhaust control ports each coupled to a respective outlet port, and electrically actuated means including a double-ended solenoid sealing member operable between said exhaust control ports for sealing one exhaust control port while simultaneously unscaling the other exhaust control port, the unsealing of said exhaust control port slightly lowering the pressure in the associated control chamber and enabling said diaphragm to thereby seal the associated inlet port to transfer the fluid flow between the other inlet-outlet ports.
Claim 5
Dependent Claim
27 words
A four-way control valve according to claim 1, wherein within each of said control chambers, said inlet ports extend closer to said diaphragm than said outlet ports.
Claim 6
Dependent Claim
45 words
A 4-way control valve according to claim 4, wherein said diaphragm is flexed convexly towards one of said inlet ports in said first control chamber to seal said inlet port and thereby interrupt communication between respective inlet and outlet ports in said first control chamber.
Claim 7
Dependent Claim
29 words
A 4-way control valve according to claim 1, wherein the area of said diaphragm is larger than the opening of each of said inlet ports in said control chambers.
Claim 8
Dependent Claim
57 words
A four-way control valve according to claim 6, wherein the total pressure exerted on said diaphragm from said pressure source through the unsealed inlet port in said first control chamber is exerted upon substantially the entire area of said diaphragm to maintain said diaphragm in sealing position on the other inlet port in said second control chamber.
Claim 9
Dependent Claim
71 words
A four-way control valve according to claim 7, wherein said diaphragm control means includes means coupled to the outlet port communicating with said unsealed inlet port for rapidly exhausting said outlet port to lower the pressure on said diaphragm in said first control chamber below the pressure on said diaphragm in said second control chamber, thereby flexing said diaphragm into sealing position against the inlet port in said first control chamber.
Claim 10
Dependent Claim
174 words
A four-way valve structure comprising: a valve housing having a chamber therein bounded by inner walls; a pair of opposing outlet apertures on opposite inner walls in said chamber leading to respective outlet passageways within said valve housing forming first and second outlet ports; opposing projections adjacent said outlet apertures, each extending from said opposite inner walls towards the inner portion of said chamber; said projections each having inlet apertures leading to respective inlet passageways within said valve housing forming first and second inlet ports; a resilient diaphragm member mounted in said chamber intermediate said opposite inner walls and between said opposing projections; said diaphragm dividing said chamber into equal half sections each having a respective inlet and outlet aperture; and exhaust control means connected to respective outlet ports for flexing said diaphragm into engagement with one of said projections in one of said chamber half sections and sealing the corresponding inlet aperture from communication with the associated outlet aperture, thereby enabling communication between the other inlet-outlet apertures in the other chamber half section.
Claim 11
Dependent Claim
174 words
A four-way valve structure comprising: a valve housing having a chamber therein bounded by inner walls; a pair of opposing outlet apertures on opposite inner walls in said chamber leading to respective outlet passageways within said valve housing forming first and second outlet ports; opposing projections adjacent said outlet apertures, each extending from said opposite inner walls towards the inner portion of said chamber; said projections each having inlet apertures leading to respective inlet passageways within said valve housing forming first and second inlet ports; a resilient diaphragm member mounted in said chamber intermediate said opposite inner walls and between said opposing projections; said diaphragm dividing said chamber into equal half sections each having a respective inlet and outlet aperture; and exhaust control means connected to respective outlet ports for flexing said diaphragm into engagement with one of said projections in one of said chamber half sections and sealing the corresponding inlet aperture from communication with the associated outlet aperture, thereby enabling communication between the other inlet-outlet apertures in the other chamber half section.
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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) | 1976-11-05 | 1977-05-07 | 1977-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-05 | 1981-05-07 | 1981-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-05 | 1985-05-07 | 1985-11-06 | $7700.00 | Window Closed / Lapsed |