Patent US3900223A successfully refreshed from Google Patents.
US3900223A
Expired / Lapsed
US
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Pipe coupling
Assignee: Sundstrand Corp
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Filing: 1974-01-23
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Granted: 1975-08-19
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Expires: 1994-01-23
Abstract
Abstract A coupling for connecting two sealed conduits as in an airconditioning system. A male member has a body with an outer sleeve closed by a diaphragm and a flow passage therethrough defined in part by a tube inside the body. A female coupling member has a body with a flow passage therethrough the end of which is closed by a diaphragm. As the parts are drawn together the end of the female member enters the outer sleeve of the male member rupturing the diaphragm and subsequently the end of the tube in the male member engages and ruptures the diaphragm across the end of the female member. The parts of the diaphragm are forced back out of the flow passage. A metal-to-metal seal between the tube and the female body member completes the flow passage and a resilient seal between the outer sleeve of the male member and the outside of the female member keeps moisture from the metal-to-metal joint.
Inventors
- 👤 James D Schafer
- 👤 Frederic W Pollman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:11
CPC Classifications
F; F16; F16L; F16L29/00; F16L29/005
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
201 words
A coupling for connecting conduits, comprising: a male member having a body with a flow passage therethrough and an outer cylindrical sleeve portion; a diaphragm across the end of said sleeve portion, closing the flow passage; a cylindrical tube inside said body defining a part of the flow passage, spaced inwardly from and concentric with the outer sleeve portion and having an end which is spaced inwardly of said diaphragm; a female member having a cylindrical body with a flow passage therethrough; a diaphragm on the end of the female body member closing the flow passage; and means for drawing the male and female body members together in coaxial relation, the end of the female body member engaging and rupturing the diaphragm over the end of the male body member and thereafter the end of the tube inside the sleeve of the male member engaging and rupturing the diaphragm over the end of the female member, establishing unobstructed communication between the flow passages, the ends of the cylindrical tube and the female body member and both diaphragms being in planes normal to the coupling axis whereby the tube and body member ends engage the respective diaphragms to apply hoop tension thereto.
Claim 2
Dependent Claim
201 words
A coupling for connecting conduits, comprising: a male member having a body with a flow passage therethrough and an outer cylindrical sleeve portion; a diaphragm across the end of said sleeve portion, closing the flow passage; a cylindrical tube inside said body defining a part of the flow passage, spaced inwardly from and concentric with the outer sleeve portion and having an end which is spaced inwardly of said diaphragm; a female member having a cylindrical body with a flow passage therethrough; a diaphragm on the end of the female body member closing the flow passage; and means for drawing the male and female body members together in coaxial relation, the end of the female body member engaging and rupturing the diaphragm over the end of the male body member and thereafter the end of the tube inside the sleeve of the male member engaging and rupturing the diaphragm over the end of the female member, establishing unobstructed communication between the flow passages, the ends of the cylindrical tube and the female body member and both diaphragms being in planes normal to the coupling axis whereby the tube and body member ends engage the respective diaphragms to apply hoop tension thereto.
Claim 3
Dependent Claim
100 words
The coupling of claim 1 in which the inner surface of the sleeve portion of the male body member has a diameter greater than the diameter of the outer surface of the female body member and the inner surface of the female body member has a diameter greater than the diameter of the outer surface of the tube inside the male body member, the sleeve portion and the tube telescoping outside and inside the female body member respectively on connection of the coupling members and the outer surfaces being spaced from the inner surfaces to accommodate the ruptured diaphragms therebetween.
Claim 4
Dependent Claim
35 words
The coupling of claim 2 in which each diaphragm has a pair of diametric scores on the inner surface thereof, at right angles to each other, the diaphragm rupturing in four sectors along the scores.
Claim 5
Dependent Claim
66 words
The coupling of claim 2 in which the end of the cylindrical tube is spaced inwardly from the diaphragm across the end of the sleeve a distance sufficient to permit the ruptured diaphragm to fold outwardly into the space between the outer surface of the female body member and the inner surface of the sleeve portion of the male body member without interference with the tube.
Claim 6
Dependent Claim
86 words
The coupling of claim 4 in which the female body member has an internal shoulder spaced inwardly from the diaphragm on the end of the female body member and against which the end of said tube seats to form a seal, the spacing of the shoulder from the female body member diaphragm being sufficient to permit the ruptured diaphragm to fold outwardly into the space between the inner surface of the female body member and the outer surface of the tube without interference with said shoulder.
Claim 7
Dependent Claim
160 words
A coupling for connecting conduits in a refrigeration system, comprising: a male member having a flow passage therethrough; a diaphragm closing said flow passage; a metal tube defining a part of the flow passage in said male member and having an end with a metal sealing surface; a female member having a body with a flow passage therethrough and a complementary metal sealing surface therein; a diaphragm on the end of the female body member closing the flow passage, means for drawing the male and female body members together in telescoped coaxial relation, rupturing said diaphragms and bringing said metal sealing surfaces into sealing engagement with each other providing a continuous refrigerant flow passage; and a resilient moistureproof seal between the telescoped surfaces of the male and female body members, sealing with each in a plane generally at right angles to the axis of the coupling, said metal-to-metal seal being between the refrigerant flow passage and said resilient moistureproof seal.
Claim 8
Dependent Claim
160 words
A coupling for connecting conduits in a refrigeration system, comprising: a male member having a flow passage therethrough; a diaphragm closing said flow passage; a metal tube defining a part of the flow passage in said male member and having an end with a metal sealing surface; a female member having a body with a flow passage therethrough and a complementary metal sealing surface therein; a diaphragm on the end of the female body member closing the flow passage, means for drawing the male and female body members together in telescoped coaxial relation, rupturing said diaphragms and bringing said metal sealing surfaces into sealing engagement with each other providing a continuous refrigerant flow passage; and a resilient moistureproof seal between the telescoped surfaces of the male and female body members, sealing with each in a plane generally at right angles to the axis of the coupling, said metal-to-metal seal being between the refrigerant flow passage and said resilient moistureproof seal.
Claim 9
Dependent Claim
45 words
The coupling of claim 6 in which said male member has an outer cylindrical sleeve portion which surrounds the female body member, said resilient moistureproof seal being located between the inner surface of said sleeve portion and the outer surface of said female body member.
Claim 10
Dependent Claim
62 words
The coupling of claim 7 in which the diaphragm closing the flow passage of the male member is carried across the end of said sleeve portion and said moistureproof seal is carried on the inner surface of said sleeve, outside said diaphragm and is engaged by the outer surface of the female body member as the female body member engages the diaphragm.
Claim 11
Dependent Claim
46 words
The coupling of claim 6 in which said metal-to-metal seal is formed between a rounded outer edge at the end of the tube of the male body member and an inwardly presented edge between a radial shoulder and an axial wall of the female body 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) | 1978-08-18 | 1979-02-17 | 1979-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-18 | 1983-02-17 | 1983-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-18 | 1987-02-17 | 1987-08-19 | $7700.00 | Window Closed / Lapsed |