US3752167A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid switching device
Assignee: Shimadzu Corp
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Filing: 1971-06-30
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Granted: 1973-08-14
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Expires: 1991-06-30
Abstract
Abstract A rotary valve having a stationary member formed therein with a plurality of fluid passages and a rotary member formed therein with at least one channel adapted to communicate one of said fluid passages to another therethrough upon rotation of said rotary member. To facilitate a satisfactorily smooth rotation of said rotary member in contact with the stationary member, both the stationary member and the rotary member are made of materials of dissimilar quality having relatively higher and lower hardness, respectively, and, in addition thereto, the contact surfaces there of are polished very accurately.
Inventors
- 👤 H Makabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:42
CPC Classifications
F; F16; F16K; F16K11/00; F16K11/02; F16K11/06; F16K11/072; F16K11/074; F16K11/0743; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86815; Y10T137/86823; Y10T137/86863
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
316 words
A fluid switching device which comprises a stationary member rigidly carried by a framework and having a flat contact surface; a plurality of fluid passages independently formed in said stationary member and extending across the entire width of said stationary member, each of said fluid passages having an opening formed on said flat contact surface of said stationary member; a rotary member rotatably carried by the framework and having a flat contact surface slidably contacting said flat contact surface of said stationary member; at least one switching passage formed in said rotary member and haVing both openings thereof formed on said flat contact surface thereof, such that one of said fluid passages in said stationary member can be selectively connected with another one of said fluid passages in said stationary member through said switching passage upon rotation of said rotary member; either of said stationary and rotary members being formed of hard glass or glass ceramic material while the other member is formed of a fluorocarbon polymer material; resilient means disposed between said framework and a surface of said rotary member opposite to said contact surface thereof for urging said rotary member toward said stationary member and to cause said contact surface of said rotary member to tightly, but slidably, contact said contact surface of said stationary member; one of said fluid passages having an opening thereof situated in alignment with the axis of rotation of said rotary member; and the other fluid passages having the openings thereof formed on said contact surface of said stationary member spaced equidistantly with respect to said opening of said one of said fluid passages in a circular arrangement, the distance between said opening of said one of said fluid passages and any one of the openings of said other fluid passages being equal to the distance between said both openings of said switching passage formed in said rotary member.
Claim 2
Dependent Claim
316 words
A fluid switching device which comprises a stationary member rigidly carried by a framework and having a flat contact surface; a plurality of fluid passages independently formed in said stationary member and extending across the entire width of said stationary member, each of said fluid passages having an opening formed on said flat contact surface of said stationary member; a rotary member rotatably carried by the framework and having a flat contact surface slidably contacting said flat contact surface of said stationary member; at least one switching passage formed in said rotary member and haVing both openings thereof formed on said flat contact surface thereof, such that one of said fluid passages in said stationary member can be selectively connected with another one of said fluid passages in said stationary member through said switching passage upon rotation of said rotary member; either of said stationary and rotary members being formed of hard glass or glass ceramic material while the other member is formed of a fluorocarbon polymer material; resilient means disposed between said framework and a surface of said rotary member opposite to said contact surface thereof for urging said rotary member toward said stationary member and to cause said contact surface of said rotary member to tightly, but slidably, contact said contact surface of said stationary member; one of said fluid passages having an opening thereof situated in alignment with the axis of rotation of said rotary member; and the other fluid passages having the openings thereof formed on said contact surface of said stationary member spaced equidistantly with respect to said opening of said one of said fluid passages in a circular arrangement, the distance between said opening of said one of said fluid passages and any one of the openings of said other fluid passages being equal to the distance between said both openings of said switching passage formed in said rotary member.
Claim 3
Dependent Claim
32 words
A fluid switching device as claimed in claim 1, wherein the periphery of the contact area formed by said contact surfaces of said stationary and rotary members is exposed to the atmosphere.
Claim 4
Dependent Claim
82 words
A fluid switching device as claimed in claim 1, wherein said one of said fluid passages having an opening which is in alignment with the axis of rotation of said rotary member is connected with a pressurized gas source whereby, when said one of said passages is connected with any one of said remaining fluid passages through said switching passage, the residual of fluid medium present in said switching passage and said any one of said remaining fluid passages can be removed.
Claim 5
Dependent Claim
29 words
A fluid switching device as claimed in claim 1, wherein said fluid switching device is a switching valve in combination with a system for the preparation of synthetic peptide.
Claim 6
Dependent Claim
35 words
A fluid switching device as claimed in claim 1, wherein the ends of the openings, opening into the contact area between said contact surfaces of said member formed of a fluorocarbon polymer material are recessed.
Claim 7
Dependent Claim
36 words
A fluid switching device as claimed in claim 1, further comprising drive means including a connecting rod for rotating said rotary member and wherein said resilient member is a compression spring mounted round said connecting rod.
Claim 8
Dependent Claim
41 words
A fluid switching device as claimed in claim 13, wherein said connecting rod is provided at a substantially intermediate portion thereof with a clutch for selectively interrupting the transmission of a rotational force from said drive means to said rotary member.
Claim 9
Dependent Claim
55 words
A fluid switching device as claimed in claim 1, wherein said one of said fluid passages having an opening which is in alignment with the axis of rotation of said rotary member is connected with a chemical reaction bath and said other fluid passages are respectively connected with sources of chemical solutions of different composition.
Claim 10
Dependent Claim
17 words
A fluid switching device as claimed in claim 8, wherein said chemical solutions are chemical corrosive materials.
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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) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |