Patent US3777782A successfully refreshed from Google Patents.
US3777782A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Double ended shut off coupling
Assignee: Crawford Fitting Co
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Filing: 1972-06-15
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Granted: 1973-12-11
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Expires: 1992-06-15
Abstract
Abstract The specification and drawings disclose a double ended quick connect shut off coupling which includes a hollow-valved male stem which releasably connects to a hollow-valved female body by a ball-type detent arrangement. The male stem is provided with a valve having a portion which extends out of the stem. The hollow female body includes a plug-type valve member spring biased toward the end of the coupling and having a flat end face with a peripheral lip or flange. The end of the male stem is arranged so as to be received within the lip when the bodies are interconnected. The configuration of the plug is such that a substantially longer biasing spring can be used and valve flutter or chatter eliminated.
Inventors
- 👤 A Shendure
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:05
CPC Classifications
F; F16; F16L; F16L37/00; F16L37/28; F16L37/30; F16L37/32; F16L37/22; F16L37/23; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87917; Y10T137/87925; Y10T137/87941
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
217 words
A shut-off guick-connect tube coupling comprising in combination: a hollow male stem having a through flow passage; a hollow female body having a through flow passage; means for releasably connecting said male stem in said female body; said male stem including a stem valve member carried for reciprocation therein and having an operating portion extending out of its through flow passage; said male stem having an outer diameter substantially less than the diameter of said seat and extending through said seat when in the coupled position; a plug valve member carried in said female body and continually biased toward said seat by a coil spring, said plug valve member having an end face which is engaged by the end of said stem and the operating portion of said stem valve, an axially extending peripheral flange surrounding said end face for circumferentially engaging the end of said stem and a recess in said end face for closely receiving said operating portion, the outer wall of said flange defining a sealing surface adapted to engage said seat, the side of said plug opposite said end face tapering radially inward and being received in said coil spring, said flange and said opening serving to stabilize said plug valve member while said coupling is being connected and while it is connected.
Claim 2
Dependent Claim
217 words
A shut-off guick-connect tube coupling comprising in combination: a hollow male stem having a through flow passage; a hollow female body having a through flow passage; means for releasably connecting said male stem in said female body; said male stem including a stem valve member carried for reciprocation therein and having an operating portion extending out of its through flow passage; said male stem having an outer diameter substantially less than the diameter of said seat and extending through said seat when in the coupled position; a plug valve member carried in said female body and continually biased toward said seat by a coil spring, said plug valve member having an end face which is engaged by the end of said stem and the operating portion of said stem valve, an axially extending peripheral flange surrounding said end face for circumferentially engaging the end of said stem and a recess in said end face for closely receiving said operating portion, the outer wall of said flange defining a sealing surface adapted to engage said seat, the side of said plug opposite said end face tapering radially inward and being received in said coil spring, said flange and said opening serving to stabilize said plug valve member while said coupling is being connected and while it is connected.
Claim 3
Dependent Claim
48 words
A coupling as defined in claim 1 wherein said end face is generally planar and the inner wall of said flange is inclined, the end of said stem having a taper corresponding to the incline of the inner wall of said flange and adapted to closely mate therewith.
Claim 4
Dependent Claim
20 words
The coupling as defined in claim 2 wherein said sealing surface is convex and said end face is generally flat.
Claim 5
Dependent Claim
36 words
The coupling as defined in claim 3 including a shoulder formed at the juncture between said sealing surface and said radially inwardly tapering end of said plug, said coil spring being in engagement with said shoulder.
Claim 6
Dependent Claim
38 words
The coupling as defined in claim 1 wherein said plug member has a maximum diameter substantially less than the diameter of the through flow passage in said female body but larger than the diameter of said coil spring.
Claim 7
Dependent Claim
34 words
The coupling as defined in claim 5 wherein said plug member is of a total length greater than its diameter and wherein a major portion of its length is received within said coil spring.
Claim 8
Dependent Claim
23 words
The coupling as defined in claim 5 wherein said plug member is supported and guided only by said spring and said male stem.
References Cited (Backward Citations)
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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) | 1976-12-10 | 1977-06-11 | 1977-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-10 | 1981-06-11 | 1981-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-10 | 1985-06-11 | 1985-12-11 | $7700.00 | Window Closed / Lapsed |