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US4210374A Expired / Lapsed US ⏱️ 0.0 years remaining

Set-screw bushing including integral electrical clamp

Assignee: Atlas Technologies Inc
•
Filing: 1978-03-03
•
Granted: 1980-07-01
•
Expires: 1998-03-03
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Abstract

Abstract A set-screw bushing including integral electrical clamp for connection to the end of a threaded pipe, although in some instances the invention is usable with an unthreaded pipe, the bushing of this invention including clamping means for securing an electrical conductor to the bushing. The bushing and the clamping means are preferably cast as an integral unit of metal. The clamping means include a c-shaped member defining an open mouth with a lip to receive various sized electrical conductors. An adjustable lug screw extends into the mouth to secure a conductor to the lip when the screw is tightened. The bushing preferably has a plain or unthreaded inner wall with the bushing being secured over the pipe by means of an adjustable set-screw extending through the bushing wall. A tab extends from the bushing wall to limit the amount of engagement between the bushing and the pipe. The upper edge of the bushing terminates in a rim which has a notch to permit ease of installation or insertion of an insulating piece within the bushing and against the rim. With the present invention the bushing is quickly installed on the pipe with the set-screw forcing the tab against a thread of the pipe to achieve a tight grip.

Inventors

  • 👤 Daniel Churla

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-02 18:34
CPC Classifications
H; H01; H01R; H01R4/00; H01R4/58; H01R4/60

Claims Analysis

Total Claims: 13
Claim 1
Independent Claim 128 words
In a set-screw bushing comprising an annual bushing body having an unthreaded inner surface for securement in a slip fit over a pipe having a threaded end, and integral, inseparable electrical conductor clamping means extending away from said bushing body, adjustable pipe tightening means spaced from said clamping means, said pipe tightening means extending through said bushing body to bear inwardly against said pipe to hold said bushing body in fixed position about said pipe, tab means, integral with said bushing body, said tab means extending inwardly from said bushing body to contact said pipe, whereby said tightening means may be advanced inwardly against said pipe so as to force said pipe against said tab means to achieve a firm union of said bushing body and said pipe.
Claim 2
Dependent Claim 128 words
In a set-screw bushing comprising an annual bushing body having an unthreaded inner surface for securement in a slip fit over a pipe having a threaded end, and integral, inseparable electrical conductor clamping means extending away from said bushing body, adjustable pipe tightening means spaced from said clamping means, said pipe tightening means extending through said bushing body to bear inwardly against said pipe to hold said bushing body in fixed position about said pipe, tab means, integral with said bushing body, said tab means extending inwardly from said bushing body to contact said pipe, whereby said tightening means may be advanced inwardly against said pipe so as to force said pipe against said tab means to achieve a firm union of said bushing body and said pipe.
Claim 3
Dependent Claim 25 words
The bushing of claim 1 wherein said tightening means is an adjustable set-screw threadedly engaging said bushing body and adapted to abut against said pipe.
Claim 4
Dependent Claim 30 words
The bushing of claim 2 wherein said pipe possesses a threaded outer wall for a portion of its length and said set-screw bears against at least one of said threads.
Claim 5
Dependent Claim 16 words
The bushing of claim 3 wherein said tab means contacts at least one of said threads.
Claim 6
Dependent Claim 25 words
The bushing of claim 4 wherein said threaded pipe end passes through an opening in a panel and is secured to said panel by nuts.
Claim 7
Dependent Claim 31 words
The bushing of claim 1 wherein said clamping means is a c-shaped member defining a mouth having a lip at its entrance and arranged to receive various diameter electrical conductors therein.
Claim 8
Dependent Claim 29 words
The bushing of claim 6 and further including releasable securable means in the form of a threaded lug extending into said mouth to clamp a conductor within said mouth.
Claim 9
Dependent Claim 13 words
The bushing of claim 7 wherein said threaded lug includes a slotted end.
Claim 10
Dependent Claim 18 words
The bushing of claim 8 wherein said c-shaped member and said bushing are cast as an integral unit.
Claim 11
Dependent Claim 13 words
The bushing of claim 9 wherein said integral unit is formed of metal.
Claim 12
Dependent Claim 10 words
The bushing of claim 10 wherein said metal is zinc.
Claim 13
Dependent Claim 37 words
The bushing of claim 1 wherein the upper edge of said bushing terminates in a rim which has a notch to permit installation or removal of an insulating piece within the bushing and cast against the rim.

References Cited (Backward Citations)

US3365693A Cited
US3941410A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1983-07-01 1983-12-31 1984-07-01 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1987-07-01 1987-12-31 1988-07-01 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1991-07-01 1991-12-31 1992-07-01 $7700.00 Window Closed / Lapsed

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