Joint elbow assembly for wiring

• US 5,016,924 A
• Filed: 11/07/1989
• Issued: 05/21/1991
• Est. Priority Date: 11/07/1989
• Status: Expired due to Fees

• Current Assignee: Lieh-Chao Lin
• Original Assignee: Lieh-Chao Lin
• Inventors: Lin, Lieh-Chao
• Primary Examiner(s): Arola, Dave W.
• Application Number:
  US07/432,510
• Time in Patent Office: 560 Days
• Field of Search: 285/127, 285/179, 285/24, 285/921, 285/915, 174/71 R, 174/68.2, 174/72 R
• US Class Current: 285/179.1
• CPC Class Codes: H02G 3/06 Joints for connecting lengths of protective tubing or channels, to each other or to casings, e.g. to distribution boxes; Ensuring electrical continuity in the joint
• CPC Class Codes: Y10S 285/915 Mastic
• CPC Class Codes: Y10S 285/921 Snap-fit

Abstract

A joint elbow assembly for wiring comprises a pipe elbow, two annular nuts, and a plurality of roller assemblies. The pipe elbow comprises a lower housing and a detachable upper housing. A plurality of flanges are formed on the outer periphery of the lower housing. A bracket is formed on the inner surface of the flange and two female lugs are formed on the two protruding ends of the bracket respectively. Each roller assembly which comprises two sleeves, a plurality of needle bearings and a central roller is inserted into the two female lugs. An adhesive is applied to the upper edges of the lower housing and the lower edges of the detachable upper housing.

Claims

1. A joint elbow assembly for wiring comprising:

a pipe elbow with a plurality of threads formed on the outer peripheries of a first and second end portions of said pipe elbow respectively;

said pipe elbow comprising a lower housing and a detachable upper housing, the cross-sectional width of said detachable upper housing being approximately one third of that of said lower housing;

a first and a second annular nuts screwing on to said first and second end portions of said pipe elbow respectively;

a first and a second grooves defined by a first and a second upper edges of said lower housing;

a first and a second protrusions defined by a first and a second lower edges of said detachable upper housing;

at least two flanges spacedly formed on the outer peripheries of the central lower portion of said lower housing respectively;

a seat formed on the inner surface of each said flange;

a pair of a first and a second female lugs formed on a first and second protruding ends of each said seat respectively;

a corresponding roller assembly inserted in each pair of said first and second female lugs;

each said roller assembly comprising a central roller, a first and a second sleeves with hollow interior, and a first and a second needle bearing sets;

each said needle bearing set comprises a plurality of needle bearings;

each said needle bearing set inserted in the hollow interior of each said first and second sleeves respectively;

a first and a second ends of each said central roller rotatably secured by said first and second sleeves respectively;

each said sleeve having a protruding spindle;

each said protruding spindle fixedly inserted into each pair of said first and second female lugs respectively;

an adhesive applied to the edges of said first and second protrusions and said first and second grooves;

whereby said upper housing and lower housing are snappedly connected by said first and second protrusions and said first and second grooves respectively and joined by said adhesive and said first and second nuts.