Patent US3902745A successfully refreshed from Google Patents.
US3902745A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical connector
Assignee: ELECTRICAL FITTINGS CORP
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Filing: 1974-01-02
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Granted: 1975-09-02
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Expires: 1994-01-02
Abstract
Abstract A coupling for a flexible electrical conduit having a resilient yieldable protective sheath includes a tubular metal body member having at one end a threaded connector section and at the other end a conduit coupling sleeve provided with an external helical ridge have the same pitch as a helical groove in the conduit inside face. A collar having a tapered inside face threaded at a pitch less than that of the helical ridge is provided with an inner annular end wall having a groove mating and engaging the sleeve helical ridge. The collar tapered face engages the conduit outer face and the conduit is compressed between the confronting faces of the collar and sleeve.
Inventors
- 👤 Thomas Mooney
- 👤 Richard A Bauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:48
CPC Classifications
F; F16; F16L; F16L33/00; F16L33/24; F16L33/01; H; H02; H02G; H02G3/00; H02G3/02; H02G3/06
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
66 words
A fitting for helically wound flexible conduit having a yieldable sheath comprising a sleeve having a helical ridge on its outer face of a pitch corresponding to that of said helically wound conduit and a collar coaxial with said sleeve and having an internal thread adapted to engage said sheath and an inner annular end wall provided with a helical groove engaging said sleeve helical ridge.
Claim 2
Dependent Claim
66 words
A fitting for helically wound flexible conduit having a yieldable sheath comprising a sleeve having a helical ridge on its outer face of a pitch corresponding to that of said helically wound conduit and a collar coaxial with said sleeve and having an internal thread adapted to engage said sheath and an inner annular end wall provided with a helical groove engaging said sleeve helical ridge.
Claim 3
Dependent Claim
21 words
The fitting of claim 1 wherein the pitch of said collar internal thread is less than that of said helical ridge.
Claim 4
Dependent Claim
16 words
The fitting of claim 2 wherein the threaded inside face of said collar is axially tapered.
Claim 5
Dependent Claim
13 words
The fitting of claim 3 wherein said sleeve is longer than said collar.
Claim 6
Dependent Claim
19 words
The fitting of claim 1 comprising an externally threaded tubular coupling section integrally formed and coaxial with said sleeve.
Claim 7
Dependent Claim
23 words
The fitting of claim 5 comprising a tool accommodating section integrally formed and coaxial with and disposed between said sleeve and coupling section.
Claim 8
Dependent Claim
115 words
In combination with a helically wound flexible conduit having a yieldable sheath and a helical groove along its inside face, a fitting having a helical ridge on its outer face of a pitch corresponding to that of said helical groove and a collar coaxial with said sleeve and having an internal thread and an inner annular end wall provided with a helical groove engaging said sleeve helical ridge, an end of said conduit being sandwiched between and compressed by the confrontery faces of said collar and said sleeve, said sheath being engaged by said collar internally threaded face and said sleeve helical ridge engaging the helical groove disposed along the inside face of said conduit.
Claim 9
Dependent Claim
115 words
In combination with a helically wound flexible conduit having a yieldable sheath and a helical groove along its inside face, a fitting having a helical ridge on its outer face of a pitch corresponding to that of said helical groove and a collar coaxial with said sleeve and having an internal thread and an inner annular end wall provided with a helical groove engaging said sleeve helical ridge, an end of said conduit being sandwiched between and compressed by the confrontery faces of said collar and said sleeve, said sheath being engaged by said collar internally threaded face and said sleeve helical ridge engaging the helical groove disposed along the inside face of said conduit.
Claim 10
Dependent Claim
21 words
The combination of claim 7 wherein the pitch of said collar internal thread is less than that of said helical ridge.
Claim 11
Dependent Claim
22 words
The combination of claim 8 wherein the threaded inside face of said collar is axially tapered toward said end of said conduit.
Claim 12
Dependent Claim
22 words
The combination of claim 7 wherein the end face of said conduit abuts the confronting end face of said collar annular wall.
References Cited (Backward Citations)
US1006671A
Cited
US1266416A
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US3281869A
Cited
US3393267A
Cited
US3549177A
Cited
US3647934A
Cited
US3659880A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-01 | 1979-03-03 | 1979-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-01 | 1983-03-03 | 1983-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-01 | 1987-03-03 | 1987-09-02 | $7700.00 | Window Closed / Lapsed |