US3796232A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary direction flow control valve
Assignee: Westran Corp
•
Filing: 1972-10-19
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Granted: 1974-03-12
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Expires: 1992-10-19
Abstract
Abstract A rotary valve for selectively controlling the direction of fluid flow between a source of pressure fluid and a fluid user. The rotary valve comprises a housing having a stator with a valve face having four diametrically opposed and arcuately spaced ports adapted to register in a selected manner with a plurality of arcuately spaced ports formed in the adjacent face of a coaxially disposed rotor. One of the stator ports is adapted to be communicated to a source of fluid pressure, while a second diametrically opposed port is adapted to be communicated to a reservoir. The remaining diametrically opposed ports in the valve face of the stator are each adapted to be communicated to a fluid user. The rotor has a T-shaped passage connecting three of the ports and a pair of separated transversely extending passages connecting pairs of ports disposed intermediate the ports connected with the T-shaped passages. The transverse passages are disposed at a different depth than the T-shaped passages so that there is no intersection between the passages.
Inventors
- 👤 T Dalton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:07
CPC Classifications
F; F15; F15B; F15B13/00; F15B13/02; F15B13/04; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/86638; Y10T137/86839; Y10T137/86863
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
219 words
A rotary directional flow control valve for use in controlling a fluid user, said valve comprising: a stator and a rotor coaxially disposed and having substantially parallel opposing end surfaces adapted for relative sliding engagement as said rotor is rotated with respect to said stator about their common axis; a plurality of passages in said stator adapted to be connected respectively to a source of pressure fluid, a reservoir and the fluid user, said passages opening to said rotor in positions equally radially spaced from the axis of rotation of the rotor; and a plurality of ports disposed in said rotor in a position to register with said stator passages upon rotation of said rotor with respect to said stator, said ports comprising a first set of three ports all connected by a first passage formed in said rotor, a second set of ports connected by a second passage in said rotor and a third set of ports connected by a third passage in said rotor, said passages in said rotor being separated from one another and said ports being arranged such that when any one port of any of said sets of ports in said rotor is connected with one of said stator passages then all of said ports in that set are also connected with stator passages.
Claim 2
Dependent Claim
219 words
A rotary directional flow control valve for use in controlling a fluid user, said valve comprising: a stator and a rotor coaxially disposed and having substantially parallel opposing end surfaces adapted for relative sliding engagement as said rotor is rotated with respect to said stator about their common axis; a plurality of passages in said stator adapted to be connected respectively to a source of pressure fluid, a reservoir and the fluid user, said passages opening to said rotor in positions equally radially spaced from the axis of rotation of the rotor; and a plurality of ports disposed in said rotor in a position to register with said stator passages upon rotation of said rotor with respect to said stator, said ports comprising a first set of three ports all connected by a first passage formed in said rotor, a second set of ports connected by a second passage in said rotor and a third set of ports connected by a third passage in said rotor, said passages in said rotor being separated from one another and said ports being arranged such that when any one port of any of said sets of ports in said rotor is connected with one of said stator passages then all of said ports in that set are also connected with stator passages.
Claim 3
Dependent Claim
37 words
The valve as defined in claim 1 and in which said first passage is at a distance from said rotor end surface different than the distances of said second and third passages from said rotor end surface.
Claim 4
Dependent Claim
112 words
The valve as defined in claim 1 and in which said rotor is rotatable to a position in which one of said ports of said second set of ports is connected with the passage in said stator connected with said source of pressure fluid, and another of said ports in said second set of ports is connected with a passage of said stator connected with said fluid user; and one of said ports of said third set of ports is connected with a passage in said stator connected with said reservoir, while another of said third set of ports is connected with a passage in said stator connected with said fluid user.
Claim 5
Dependent Claim
39 words
The valve as defined in claim 1 and in which said rotor passages include straight sections extending perpendicular to the axis of rotation of said rotor and straight sections extending parallel to the axis of rotation of said rotor.
Claim 6
Dependent Claim
47 words
The valve as defined in claim 4 and in which the straight sections of the passages connecting said second and third sets of ports are spaced differently from said end face of said rotor than the straight section of the passage connecting said first set of ports.
Claim 7
Dependent Claim
235 words
A rotary directional flow control valve for use in controlling a fluid user, said valve comprising: a stator and a rotor coaxially disposed and having substantially parallel opposing end surfaces adapted for relative sliding engagement as said rotor is rotated with respect to said stator about their common axis; a plurality of passages in said stator adapted to be connected respectively to a source of pressure fluid, a reservoir and the fluid user, said passages opening to said rotor in positions equally radially spaced from the axis of rotation of the rotor; a plurality of ports disposed in said rotor in a position to register with said stator passages upon rotation of said rotor with respect to said stator, said ports comprising a first set of ports all connected by a first passage formed in said rotor, a second set of ports connected by a second passage in said rotor and a third set of ports connected by a third passage in said rotor, said first passage is T-shaped and the number of ports in said first set of ports is three, said passages in said rotor being separated from one another and said ports being arranged such that when any one port of any of said set of ports in said rotor is connected with one of said stator passages then all of said ports in that set are also connected with stator passages.
Claim 8
Dependent Claim
235 words
A rotary directional flow control valve for use in controlling a fluid user, said valve comprising: a stator and a rotor coaxially disposed and having substantially parallel opposing end surfaces adapted for relative sliding engagement as said rotor is rotated with respect to said stator about their common axis; a plurality of passages in said stator adapted to be connected respectively to a source of pressure fluid, a reservoir and the fluid user, said passages opening to said rotor in positions equally radially spaced from the axis of rotation of the rotor; a plurality of ports disposed in said rotor in a position to register with said stator passages upon rotation of said rotor with respect to said stator, said ports comprising a first set of ports all connected by a first passage formed in said rotor, a second set of ports connected by a second passage in said rotor and a third set of ports connected by a third passage in said rotor, said first passage is T-shaped and the number of ports in said first set of ports is three, said passages in said rotor being separated from one another and said ports being arranged such that when any one port of any of said set of ports in said rotor is connected with one of said stator passages then all of said ports in that set are also connected with stator passages.
Claim 9
Dependent Claim
66 words
The valve as defined in claim 6 and in which said rotor is rotatable to a position in which two of the ports of said first set of ports are connected to passages in said stator connected with said fluid user, and the third port in said first set of ports is connected with the passage in said stator connected with said source of pressure fluid.
Claim 10
Dependent Claim
88 words
The valve as defined in claim 6 and in which said rotor is rotatable to a position in which one of said ports of said first set of ports is connected with passages in said stator connected with said source of fluid pressure, the second port in said first set of ports is connected with a passage in said stator connected with said fluid reservoir, and the third port in said first set of ports is connected with a passage in said stator connected with said fluid user.
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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) | 1977-03-11 | 1977-09-10 | 1978-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-11 | 1981-09-10 | 1982-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-11 | 1985-09-10 | 1986-03-12 | $7700.00 | Window Closed / Lapsed |