US3557833A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Micrometric capillary valve with tapered passage
Assignee: ROGER GILMONT INSTRUMENTS Inc
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Filing: 1968-04-16
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Granted: 1971-01-26
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Expires: 1988-04-16
Abstract
Abstract An adjustable valve for controlling fluid flow at appreciable rates comprises a tapered passage between inlet and outlet ports, in which passage an elongated member is axially slidable with appreciable clearance, thereby to vary the rate of fluid flow through said passage. In order to maintain the required members, radial orientation of the member within the passage, inwardly extending elements are provided in the passage which contact the outer surface of the member, while fluid flow clearances are defined between the member and the inner surface of the passage. The end of the passage remote from the member may be narrowed to define a seat with which the tip of the member cooperates to provide a positive-off feature.
Inventors
- 👤 Roger Gilmont
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:32
CPC Classifications
F; F16; F16K; F16K47/00; F16K47/04; F16K1/00; F16K1/32; F16K1/52; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86718; Y10T137/86734
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
183 words
An adjustable valve, comprising a body having a passage communicating between a fluid inlet port and a fluid outlet port, at least a section of said passage having a tapered inner diameter and at least two circumferentially spaced elements extending radially inwardly from said body and axially along said passage section and terminating radially in surfaces which are substantially pArallel to the axis of said passage section to define protrusions having nonradially tapering, engageable surfaces, and an elongated cylindrical member received in said passage and having an axially elongated smooth uninterrupted outer surface which engages and slides over said element surfaces, said element surfaces thereby effectively positioning said member within said passage, at least two axially tapered clearances being defined circumferentially between said elements and radially between said member and said body, the circumferential extent of said substantial axis-parallel surfaces engaged by said elongated member being only a small fraction of the circumferential extent of said tapered passage section, the total clearance between said member and said body varying from approximately 0.0005 to 0.004 inches at opposite ends of said tapered passage section.
Claim 2
Dependent Claim
183 words
An adjustable valve, comprising a body having a passage communicating between a fluid inlet port and a fluid outlet port, at least a section of said passage having a tapered inner diameter and at least two circumferentially spaced elements extending radially inwardly from said body and axially along said passage section and terminating radially in surfaces which are substantially pArallel to the axis of said passage section to define protrusions having nonradially tapering, engageable surfaces, and an elongated cylindrical member received in said passage and having an axially elongated smooth uninterrupted outer surface which engages and slides over said element surfaces, said element surfaces thereby effectively positioning said member within said passage, at least two axially tapered clearances being defined circumferentially between said elements and radially between said member and said body, the circumferential extent of said substantial axis-parallel surfaces engaged by said elongated member being only a small fraction of the circumferential extent of said tapered passage section, the total clearance between said member and said body varying from approximately 0.0005 to 0.004 inches at opposite ends of said tapered passage section.
Claim 3
Dependent Claim
22 words
The adjustable valve of claim 1, in which said element surfaces comprise flats arranged substantially equally circumferentially spaced about said passage section.
Claim 4
Dependent Claim
17 words
The adjustable valve of claim 2, in which said element surfaces comprise at least three said flats.
Claim 5
Dependent Claim
51 words
The adjustable valve of claim 2, in which said passage section defining a seat terminates in a radially reduced section, the end of said member being formed to snugly mate with said seat to form an effective seal in said passage section when said member is axially moved into engagement therewith.
Claim 6
Dependent Claim
35 words
The adjustable valve of claim 1, further comprising precision indicator means on said body operatively connected to said member and effective accurately to externally indicate the axial position of said member along said passage section.
Claim 7
Dependent Claim
51 words
The adjustable valve of claim 1, in which said passage section defining a seat terminates in a radially reduced section, the end of said member being formed to snugly mate with said seat to form an effective seal in said passage section when said member is axially moved into engagement therewith.
Claim 8
Dependent Claim
16 words
The adjustable valve of claim 6, in which said reduced radial section defines a frustoconical seat.
Claim 9
Dependent Claim
25 words
The adjustable valve of claim 1, in which said tapered passage section varies in diameter by approximately 0.003 inches per inch of its axial length.
Claim 10
Dependent Claim
37 words
The adjustable valve of claim 1, in which the equivalent diameter of said clearance is in excess of 1 percent of the diameter of said member for a major portion of the axial length of said member.
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) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |