US3791680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
End fittings for flexible metallic conduits
Assignee: Smiths Group PLC
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Filing: 1972-06-28
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Granted: 1974-02-12
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Expires: 1992-06-28
Abstract
Abstract An end fitting for a flexible metallic conduit comprises a metal tube having an external thread at one end to enable the tube to be screwed into an end of the conduit, and first and second tubular members embracing the tube and disposed end to end along the tube. The tube has a plurality of projections spaced apart around the tube and disposed between the threaded end of the tube and the other end of the tube, and the second tubular member has a plurality of projections which interengage with the projections on the tube to enable the second tubular member to impart rotary movement to the tube. The second member has an inwardly directed flange which bears against the side of the projections on the tube remote from the threaded end thereof, and the first member is disposed between the flange and said other end of the tube, which end of the tube is turned outwardly captively to mount the first and second members on the tube. The first member is rotatable about the tube and has an external thread to facilitate mounting of the end fitting on a support.
Inventors
- 👤 I Cleare
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:33
CPC Classifications
F; F16; F16L; F16L33/00; F16L33/26; H; H02; H02G; H02G3/00; H02G3/02; H02G3/06; H02G3/0616
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
313 words
An end fitting for a flexible metallic conduit, comprising a tubular metal body which is outwardly flared at one end, said body including an externally screw threaded portion adjacent the other end thereof to enable the tubular body to be screwed into an end of a flexible metallic conduit, a plurality of outwardly extending projections spaced apart around the periphery of said tubular body at a location intermediate said flared end and the said externally screw threaded portion thereof, first and second tubular members coextensively embracing the said tubular body and disposed end to end along the tubular body, the said first tubular member being of metal and externally screw threaded and being rotatably mounted on the said tubular body between its said flared end and its said plurality of outwardly extending projections, and the said second tubular member comprising a sleeve which embraces at least a part of the said external screw threaded portion of said tubular body, said second tubular member including an inwardly directed flange which bears against the side of the said plurality of outwardly extending projections remote from the said screw threaded portion of the tubular body, said second tubular member further including a plurality of inwardly directed projections which interengage with the said outwardly extending projections on the tubular body to enable said tubular body to be screwed into the flexible metallic conduit by appropriately rotating the said second tubular member while maintaining the said first tubular member stationary, and a resilient sealing means positioned between the said first and second tubular members to provide a liquid-tight seal therebetween, said resilient sealing means being stressed to urge the said first tubular member against the said flared end of the tubular body and to urge the said inwardly directed flange of the second tubular member against the side of the said outwardly extending projections on said tubular body.
Claim 2
Dependent Claim
313 words
An end fitting for a flexible metallic conduit, comprising a tubular metal body which is outwardly flared at one end, said body including an externally screw threaded portion adjacent the other end thereof to enable the tubular body to be screwed into an end of a flexible metallic conduit, a plurality of outwardly extending projections spaced apart around the periphery of said tubular body at a location intermediate said flared end and the said externally screw threaded portion thereof, first and second tubular members coextensively embracing the said tubular body and disposed end to end along the tubular body, the said first tubular member being of metal and externally screw threaded and being rotatably mounted on the said tubular body between its said flared end and its said plurality of outwardly extending projections, and the said second tubular member comprising a sleeve which embraces at least a part of the said external screw threaded portion of said tubular body, said second tubular member including an inwardly directed flange which bears against the side of the said plurality of outwardly extending projections remote from the said screw threaded portion of the tubular body, said second tubular member further including a plurality of inwardly directed projections which interengage with the said outwardly extending projections on the tubular body to enable said tubular body to be screwed into the flexible metallic conduit by appropriately rotating the said second tubular member while maintaining the said first tubular member stationary, and a resilient sealing means positioned between the said first and second tubular members to provide a liquid-tight seal therebetween, said resilient sealing means being stressed to urge the said first tubular member against the said flared end of the tubular body and to urge the said inwardly directed flange of the second tubular member against the side of the said outwardly extending projections on said tubular body.
Claim 3
Dependent Claim
15 words
An end fitting according to claim 1, wherein said resilient sealing means is an O-ring.
Claim 4
Dependent Claim
315 words
An end fitting for a flexible metallic conduit, comprising a tubular metal body which is outwardly flared at one end, said body including an externally screw threaded portion adjacent the other end thereof to enable the tubular body to be screwed into an end of a flexible metallic conduit, at least one outwardly extending projection on the said tubular body at a location intermediate said flared end and the said externally screw threaded portion thereof, first and second tubular members coextensively embracing the said tubular body, the said first tubular member being of metal, externally screw threaded, and being rotatably mounted on the said tubular body between its said flared end and its said at least one outwardly extending projection, and the said second tubular member comprising a sleeve which embraces at least a part of the said externally screw threaded portion of said tubular body, said second tubular member including inwardly directed flange means positioned to bear against the side of the said at least one outwardly extending projection remote from the said screw threaded portion of the tubular body, said second tubular member further including at least one inwardly directed projection which interengages with the said at least one outwardly extending projection on the tubular body to enable said tubular body to be screwed into the flexible metallic conduit by appropriately rotating the said second tubular member while maintaining the said first tubular member stationary, and a resilient sealing means positioned between the said first and second tubular members to provide a liquid-tight seal therebetween, said resilient sealing means being stressed to exert pressure which urges the said first tubular member against the said flared end of the tubular body and to exert pressure which urges the said inwardly directed flange means of the second tubular member against the side of the said at least one outwardly extending projection on said tubular body.
Claim 5
Dependent Claim
315 words
An end fitting for a flexible metallic conduit, comprising a tubular metal body which is outwardly flared at one end, said body including an externally screw threaded portion adjacent the other end thereof to enable the tubular body to be screwed into an end of a flexible metallic conduit, at least one outwardly extending projection on the said tubular body at a location intermediate said flared end and the said externally screw threaded portion thereof, first and second tubular members coextensively embracing the said tubular body, the said first tubular member being of metal, externally screw threaded, and being rotatably mounted on the said tubular body between its said flared end and its said at least one outwardly extending projection, and the said second tubular member comprising a sleeve which embraces at least a part of the said externally screw threaded portion of said tubular body, said second tubular member including inwardly directed flange means positioned to bear against the side of the said at least one outwardly extending projection remote from the said screw threaded portion of the tubular body, said second tubular member further including at least one inwardly directed projection which interengages with the said at least one outwardly extending projection on the tubular body to enable said tubular body to be screwed into the flexible metallic conduit by appropriately rotating the said second tubular member while maintaining the said first tubular member stationary, and a resilient sealing means positioned between the said first and second tubular members to provide a liquid-tight seal therebetween, said resilient sealing means being stressed to exert pressure which urges the said first tubular member against the said flared end of the tubular body and to exert pressure which urges the said inwardly directed flange means of the second tubular member against the side of the said at least one outwardly extending projection on said tubular body.
References Cited (Backward Citations)
US609383A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-11 | 1977-08-13 | 1978-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-11 | 1981-08-13 | 1982-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-11 | 1985-08-13 | 1986-02-12 | $7700.00 | Window Closed / Lapsed |