Patent US4189198A successfully refreshed from Google Patents.
US3801142A
Expired / Lapsed
US
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Fluid coupling
Assignee: Terumo BCT Inc
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Filing: 1972-06-30
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Granted: 1974-04-02
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Expires: 1992-06-30
Abstract
Abstract An improved fluid coupling permitting relative rotation between two rotatable fluid-tight seal elements, having confronting annular fluid-tight surfaces, maintained in a fluid-tight relationship by axial compression of a length of elastic tubing forming one of the fluid connections to said seal elements.
Inventors
- 👤 A Jones
- 👤 G Judson
- 👤 R Kellogg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 01:03
CPC Classifications
F; F16; F16L; F16L27/00; F16L27/08; F16L27/0804; F16L27/0808; F16L27/0812; F16L27/082; F16J; F16J15/00; F16J15/16; F16J15/34; F16J15/36; F16L27/0824; F16L27/0828
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
196 words
A rotatable fluid coupling comprising, in combination, a hollow seal body having a non-circular periphery and having an axially-aligned cavity therein, a first and a second ceramic seal element disposed in said cavity, said seal elements having confronting annular surfaces lapped to a fluid-tight smoothness, a first section of flexible elastic tubing disposed within said seal body, having one end thereof connected to one of said seal elements, a seal adapter element fixed in said seal body and having an axial bore therethrough, and a portion connected to said flexible tubing section, means for supporting said ceramic seal elements within said seal body, means for applying a compressional force to said ceramic seal elements by axially compressing said flexible elastic tubing comprising a weight which rests on said seal body when the coupling is operative, said weight having a non-circular cavity for receiving said seal body in a non-rotatable relationship, and having a slotted portion admitting a tubing connection to said body, and a second elastic tubing section external to said seal body for establishing a fluid connection to the seal element confronting the element connected to the section of elastic tubing within the seal body.
Claim 2
Dependent Claim
196 words
A rotatable fluid coupling comprising, in combination, a hollow seal body having a non-circular periphery and having an axially-aligned cavity therein, a first and a second ceramic seal element disposed in said cavity, said seal elements having confronting annular surfaces lapped to a fluid-tight smoothness, a first section of flexible elastic tubing disposed within said seal body, having one end thereof connected to one of said seal elements, a seal adapter element fixed in said seal body and having an axial bore therethrough, and a portion connected to said flexible tubing section, means for supporting said ceramic seal elements within said seal body, means for applying a compressional force to said ceramic seal elements by axially compressing said flexible elastic tubing comprising a weight which rests on said seal body when the coupling is operative, said weight having a non-circular cavity for receiving said seal body in a non-rotatable relationship, and having a slotted portion admitting a tubing connection to said body, and a second elastic tubing section external to said seal body for establishing a fluid connection to the seal element confronting the element connected to the section of elastic tubing within the seal body.
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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) | 1977-04-01 | 1977-10-01 | 1978-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-01 | 1981-10-01 | 1982-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-01 | 1985-10-01 | 1986-04-02 | $7700.00 | Window Closed / Lapsed |