Patent US3556157A successfully refreshed from Google Patents.
US3556157A
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US
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Linear fluid restrictor having a variable coefficient of restriction and method for making the same
Assignee: Corning Glass Works
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Filing: 1968-11-22
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Granted: 1971-01-19
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Expires: 1988-11-22
Abstract
Abstract A fluid flow restrictor having a resilient compressible body containing one or more fluid conductive passages is disclosed. The passages are of sufficient length with respect to their cross-sectional areas to insure laminar fluid flow therein when the body is in either a compressed or uncompressed state. The coefficient of restriction of the restrictor can be varied over a range of values, without altering the linearity of the fluid volume flow-to-pressure drop relationship thereof, by placing the body in various stages of compression.
Inventors
- 👤 Herbert M Eckerlin
- 👤 Lawrence W Langley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:46
CPC Classifications
F; F16; F16L; F16L55/00; F16L55/02; F16L55/027; F16L55/02763; A; A61; A61M; A61M39/00; A61M39/22; A61M39/28; F15; F15D; F15D1/00; F15D1/02; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87265; Y10T137/8741; Y10T137/87434
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
76 words
A fluid restrictor having a variable coefficient of restriction comprising: a body of resilient compressible material containing at least one fluid passage therethrough, said passage having a lengthto cross-sectional-area relationship so as to permit laminar flow to be maintained therethrough; and means for compressing said body substantially perpendicular to the longitudinal axis thereof along at least a portion of the length of said passage whereby a linear relationship between flow volume and pressure drop is maintained.
Claim 2
Dependent Claim
76 words
A fluid restrictor having a variable coefficient of restriction comprising: a body of resilient compressible material containing at least one fluid passage therethrough, said passage having a lengthto cross-sectional-area relationship so as to permit laminar flow to be maintained therethrough; and means for compressing said body substantially perpendicular to the longitudinal axis thereof along at least a portion of the length of said passage whereby a linear relationship between flow volume and pressure drop is maintained.
Claim 3
Dependent Claim
21 words
The restrictor according to claim 1 further comprising terminating means attached to said body for providing fluid access to said passage.
Claim 4
Dependent Claim
31 words
The restrictor according to claim 1 wherein said body is in the shape of the cylinder, said at least one passage extending through said body parallel to the longitudinal axis thereof.
Claim 5
Dependent Claim
23 words
The restrictor of claim 1 wherein said resilient compressible material is selected from the group consisting of rubber, silicone rubber, teflon, and urethane.
Claim 6
Dependent Claim
50 words
A lInear fluid restrictor having a variable coefficient of restriction comprising: an elongated parallelepiped body of resilient compressible material containing at least one fluid passage extending therethrough parallel to the longitudinal axis thereof; and means for compressing said body along at least a portion of the length of said passage.
Claim 7
Dependent Claim
50 words
A lInear fluid restrictor having a variable coefficient of restriction comprising: an elongated parallelepiped body of resilient compressible material containing at least one fluid passage extending therethrough parallel to the longitudinal axis thereof; and means for compressing said body along at least a portion of the length of said passage.
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) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |