US3803532A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical conduit
Assignee: Cyprus Mines Corp
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Filing: 1973-03-19
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Granted: 1974-04-09
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Expires: 1993-03-19
Abstract
Abstract A coupling for a pair of electrically conductive tubular conduits, in which the first conduit is upset at one end to receive the end of the second conduit, the upset portion of the first conduit being provided with a bayonet groove to receive a projection adjacent the end of the second conduit.
Inventors
- 👤 F Taxon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:23
CPC Classifications
H; H02; H02G; H02G3/00; H02G3/02; H02G3/06
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
190 words
In a coupling for electrical conduit, the combination of: a first tubular conduit section having at one end an upset cylindrical portion of greater internal diameter than the external diameter of the body of such section and connected thereto by a tapered annulus, such cylindrical portion being provided with an internal groove extending from the outer end of such cylindrical portion towards the other end of said first conduit section and decreasing in depth; a second tubular conduit section of approximately the same external diameter as that of the body of said first conduit section, and having adjacent one end an externally projecting button adapted to fit into said groove of the first conduit section, relative longitudinal and rotational movement of said conduit sections causing said sections to lock together; and said conduit sections being formed of electrically conductive material and said upset cylindrical portion of the first conduit section being internally coated with a layer of enamel for corrosion protection, said relative movement of the sections causing a portion of the second conduit section to pierce through said layer and establish electrical contact therethrough with the first conduit section.
Claim 2
Dependent Claim
190 words
In a coupling for electrical conduit, the combination of: a first tubular conduit section having at one end an upset cylindrical portion of greater internal diameter than the external diameter of the body of such section and connected thereto by a tapered annulus, such cylindrical portion being provided with an internal groove extending from the outer end of such cylindrical portion towards the other end of said first conduit section and decreasing in depth; a second tubular conduit section of approximately the same external diameter as that of the body of said first conduit section, and having adjacent one end an externally projecting button adapted to fit into said groove of the first conduit section, relative longitudinal and rotational movement of said conduit sections causing said sections to lock together; and said conduit sections being formed of electrically conductive material and said upset cylindrical portion of the first conduit section being internally coated with a layer of enamel for corrosion protection, said relative movement of the sections causing a portion of the second conduit section to pierce through said layer and establish electrical contact therethrough with the first conduit section.
Claim 3
Dependent Claim
235 words
In a coupling for electrical conduit, the combination of: a first tubular conduit section having at one end an upset cylindrical portion of greater internal diameter than the external diameter of the body of such section and connected thereto by a tapered annulus, such cylindrical portion being provided with an internal groove extending from the outer end of such cylindrical portion towards the other end of said first conduit section; said groove including a first portion generally parallel to the axis of said first conduit section, and a second portion communicating with the inner end of said first portion and extending at an angle thereto to cause said relative movement between said conduit sections to lock the same together; a second tubular conduit section of approximately the same external diameter as that of the body of said first conduit section, and having adjacent one end an externally projecting button adapted to fit into said groove of the first conduit section, relative longitudinal and rotational movement of said conduit sections causing said sections to lock together; and said conduit sections being formed of electrically conductive material and said upset cylindrical portion of the first conduit section being internally coated with a layer of enamel for corrosion protection, said relative movement of the sections causing a portion of the second conduit section to pierce through said layer and establish electrical contact therethrough with the first conduit section.
Claim 4
Dependent Claim
235 words
In a coupling for electrical conduit, the combination of: a first tubular conduit section having at one end an upset cylindrical portion of greater internal diameter than the external diameter of the body of such section and connected thereto by a tapered annulus, such cylindrical portion being provided with an internal groove extending from the outer end of such cylindrical portion towards the other end of said first conduit section; said groove including a first portion generally parallel to the axis of said first conduit section, and a second portion communicating with the inner end of said first portion and extending at an angle thereto to cause said relative movement between said conduit sections to lock the same together; a second tubular conduit section of approximately the same external diameter as that of the body of said first conduit section, and having adjacent one end an externally projecting button adapted to fit into said groove of the first conduit section, relative longitudinal and rotational movement of said conduit sections causing said sections to lock together; and said conduit sections being formed of electrically conductive material and said upset cylindrical portion of the first conduit section being internally coated with a layer of enamel for corrosion protection, said relative movement of the sections causing a portion of the second conduit section to pierce through said layer and establish electrical contact therethrough with the first conduit section.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-04-08 | 1977-10-08 | 1978-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-08 | 1981-10-08 | 1982-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-08 | 1985-10-08 | 1986-04-09 | $7700.00 | Window Closed / Lapsed |