Patent US3726547A successfully refreshed from Google Patents.
US3726547A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Connector for flexible non-metallic conduit
Assignee: Ideal Industries Inc
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Filing: 1971-05-17
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Granted: 1973-04-10
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Expires: 1991-05-17
Abstract
Abstract This is concerned with a connector for joining non-metallic conduit or tubing to a terminus, for example a box, junction or the like. The connector takes the form of a housing with a tapered interior and an all-plastic pilot projecting therefrom at the large end with threads on the surface thereof which are constructed and adapted to bite into the inner surface of nonmetallic conduit. The tapered inner surface or bore of the housing also has threads which have the same pitch as the threads on the pilot. The pilot is joined to the small end of the passage through the housing by a non-rotatable joint and secured there so that the two parts will turn as one unit. The housing and pilot or insert are held by a free-wheeling connection on the flanged end of a body member by a nousing nut which may be either metal or plastic. The body element is constructed to be inserted into an opening in a box, junction or what-have-you and sealed in place.
Inventors
- 👤 J Cox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:22
CPC Classifications
F; F16; F16L; F16L47/00; F16L47/20; F16L47/24
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
163 words
In a connector assembly for joining non-metallic conduit to a terminus, an all-plastic generally cylindrical housing with a generally open interior passage, larger at one end than the other and generally tapered in between, a generally tubular all-plastic pilot in the passage extending beyond the large end thereof, means forming a non-rotatable joint between the inner end of the pilot and the small end of the passage, male threads on the pilot extending from outside the passage inwardly at least past the large end of the passage, and internal threads in the tapered portion of the housing passage overlapping the male threads on the pilot a limited extent with the internal threads extending inwardly a substantial distance beyond the male threads on the pilot, the male threads on the pilot extending outwardly a substantial distance beyond the internal threads in the housing passage, both sets of threads having a shallow leading flank and a steep trailing flank and being of the same pitch.
Claim 2
Dependent Claim
163 words
In a connector assembly for joining non-metallic conduit to a terminus, an all-plastic generally cylindrical housing with a generally open interior passage, larger at one end than the other and generally tapered in between, a generally tubular all-plastic pilot in the passage extending beyond the large end thereof, means forming a non-rotatable joint between the inner end of the pilot and the small end of the passage, male threads on the pilot extending from outside the passage inwardly at least past the large end of the passage, and internal threads in the tapered portion of the housing passage overlapping the male threads on the pilot a limited extent with the internal threads extending inwardly a substantial distance beyond the male threads on the pilot, the male threads on the pilot extending outwardly a substantial distance beyond the internal threads in the housing passage, both sets of threads having a shallow leading flank and a steep trailing flank and being of the same pitch.
Claim 3
Dependent Claim
42 words
The structure of claim 1 further characterized by and including a seal on the housing and movable therewith, the seal being a integral part of the housing and in the form of an annulus extending in the opposite direction from the pilot.
Claim 4
Dependent Claim
40 words
The structure of claim 1 further characterized in that the means forming the non-rotatable joint includes a series of flats on the inner end of the pilot engaging a corresponding series of flats in the small end of the housing.
Claim 5
Dependent Claim
23 words
The structure of claim 3 further characterized in that the flats on the pilot are ultrasonically welded to the flats on the housing.
Claim 6
Dependent Claim
161 words
A connector assembly for attaching flexible non-metallic conduit to a terminus, including a body, an all-plastic generally cylindrical housing with a generally open interior passage, larger at one end than at the other and generally tapered in between, external threads on the other end of the housing, a housing nut flanged to the body so as to freely rotate thereon having internal threads engaging the external threads on the housing so that rotation thereof relative to the housing will draw the housing toward the body, a generally tubular all-plastic pilot in the passage extending toward and beyond the large end thereof, means forming a non-rotatable joint between the inner end of the pilot and the small end of the passage, and male threads on the pilot projecting from said one end and adapted to be rotatably inserted into the end of flexible non-metallic conduit so as to draw the conduit into sealing engagement with the internal tapered surface in the housing.
Claim 7
Dependent Claim
161 words
A connector assembly for attaching flexible non-metallic conduit to a terminus, including a body, an all-plastic generally cylindrical housing with a generally open interior passage, larger at one end than at the other and generally tapered in between, external threads on the other end of the housing, a housing nut flanged to the body so as to freely rotate thereon having internal threads engaging the external threads on the housing so that rotation thereof relative to the housing will draw the housing toward the body, a generally tubular all-plastic pilot in the passage extending toward and beyond the large end thereof, means forming a non-rotatable joint between the inner end of the pilot and the small end of the passage, and male threads on the pilot projecting from said one end and adapted to be rotatably inserted into the end of flexible non-metallic conduit so as to draw the conduit into sealing engagement with the internal tapered surface in the housing.
Claim 8
Dependent Claim
17 words
The structure of claim 5 further characterized in that the housing nut is made of sheet metal.
Claim 9
Dependent Claim
16 words
The structure of claim 5 further characterized in that the housing nut is made of plastic.
References Cited (Backward Citations)
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US2782060A
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Cited
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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) | 1976-04-09 | 1976-10-09 | 1977-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-09 | 1980-10-09 | 1981-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-09 | 1984-10-09 | 1985-04-10 | $7700.00 | Window Closed / Lapsed |