US3843833A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-piece screw-in adjustable bushing
Assignee: Heyman Manufacturing Co
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Filing: 1973-05-09
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Granted: 1974-10-22
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Expires: 1993-05-09
Abstract
Abstract The present invention relates to an electrical insulating and strain relief bushing which is intended to be inserted in an aperture in a mounting member, and is adapted to receive and lock an electrical conductor against movement therethrough, while electrically insulating the conductor from the mounting member. The bushing comprises first and second tubular body portions connectable together by screwing one into the other, both body portions being provided with passages which, together, define an electrical conductor receiving passage extending through the bushing. The configuration of the body portion is such that, when they are screwed together, the cross section of said conductor receiving passage is reduced to grip the conductor. The bushing includes resilient means which, when the bushing is engaged into an aperture in the mounting member, locks the bushing to the mounting member.
Inventors
- 👤 J Nicholson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:10
CPC Classifications
H; H02; H02G; H02G3/00; H02G3/02; H02G3/06; H02G3/0616; H02G3/0625; H02G3/0633
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
151 words
An electric bushing of the type intended to be inserted in an aperture in a mounting member and adapted to receive and lock an electrical conductor against movement therethrough whilst electrically insulating the conductor from the mounting member, comprising first and second generally tubular body portions connected together the second within the first, both body portions being provided with passages which together define an electrical conductor receivinG passage extending through the two body portions of the bushing, said first body portion including a transverse wall, said first body portion including a longitudinally extending slot adapted to receive an electrical conductor therethrough, said first and second body portions being mutually telescopically adjustable to vary the cross section of said conductor receiving passage between said transferse wall and said second body portion, and said bushing including means on said first body protion to secure the bushing within an aperture in said mounting member.
Claim 2
Dependent Claim
151 words
An electric bushing of the type intended to be inserted in an aperture in a mounting member and adapted to receive and lock an electrical conductor against movement therethrough whilst electrically insulating the conductor from the mounting member, comprising first and second generally tubular body portions connected together the second within the first, both body portions being provided with passages which together define an electrical conductor receivinG passage extending through the two body portions of the bushing, said first body portion including a transverse wall, said first body portion including a longitudinally extending slot adapted to receive an electrical conductor therethrough, said first and second body portions being mutually telescopically adjustable to vary the cross section of said conductor receiving passage between said transferse wall and said second body portion, and said bushing including means on said first body protion to secure the bushing within an aperture in said mounting member.
Claim 3
Dependent Claim
72 words
A bushing as claimed in claim 1 wherein said bushing securing means comprises an external flange on one end of said first body portion away from said transverse wall, and at least one resilient locking member adjacent said flange projecting externally of said first body portion, said resilient locking member cooperable to engage said mounting member and hold said mounting member between said flange and said at least one resilient locking member.
Claim 4
Dependent Claim
70 words
A bushing as claimed in claim 2, wherein a pair of diametrically opposed resilient locking members are provided, each comprising a longitudinally extending resilient finger defined by a generally U-shaped slot in the first body portion, each finger extending from an integral connection with the first body portion towards the flange, terminating adjacent the flange, and diverging outwardly from the external surface of the first body portion towards the flange.
Claim 5
Dependent Claim
19 words
A bushing as claimed in claim 3, wherein each finger terminates adjacent the flange in a stepped end face.
Claim 6
Dependent Claim
32 words
A bushing as claimed in claim 2, wherein the first body portion is formed externally with a pair of diametrically opposed flat surfaces, each provided with one of said resilient locking members.
Claim 7
Dependent Claim
17 words
A bushing as claimed in claim 1 wherein said first portion is flexible inward toward its passage.
Claim 8
Dependent Claim
35 words
A bushing as claimed in claim 1 wherein the second body portion includes an external integral flange adjacent the end of the passage therein normally away from the transverse wall of said first body portion.
Claim 9
Dependent Claim
47 words
A bushing as claimed in claim 7, including an external flange on said first body portion, and said flanges of the first and second body portions are annular, and the flange of the second body portion is recessed to accommodate the flange of the first body portion.
Claim 10
Dependent Claim
35 words
A bushing as claimed in claim 1, wherein the first and second body portions are, respectively, internally and externally screw-threaded whereby the second body portion is screw-threadable into the passage of the first body portion.
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) | 1977-10-21 | 1978-04-22 | 1978-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-21 | 1982-04-22 | 1982-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-21 | 1986-04-22 | 1986-10-22 | $7700.00 | Window Closed / Lapsed |