3687499 is referenced by 19 patents and cites 10 patents.

A novel alignment element for connecting two tubular members having substantially the same inside diameter is provided. The alignment element comprises a cylindrical member having an outside diameter at one end that can be press fitted into one of the tubular members and an outside diameter at the other end that is slightly smaller to permit a slip fit with the other tubular member. A novel coupler for connecting two tubular members is provided that has end portions each having an outside diameter slightly less than the inside diameter of the tubular member into which they are inserted and a centrally located collar having substantially the same outside diameter as the tubular members.

Title
Coupling devices
Application Number
05/008,762
Publication Number
3687499
Application Date
January 23, 1970
Publication Date
August 29, 1972
Inventor
Guilfoyle Sr Edward C
IPC
F16b 13/00
F16B 05/02
F16B 07/04
F16B 09/02
F16B 07/18
F16B 09/00
A47G 25/06
A47G 25/00
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