Coupling unit

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Description

FIG. 1 is a top perspective view of a coupling unit showing my new design;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a top perspective view of a modified form of the coupling unit shown in FIG. 1; and

FIG. 4 is a bottom perspective view of FIG. 3.

Referenced Cited
U.S. Patent Documents
D128314 July 1941 Kelly
D224107 July 1972 Mastis
486118 November 1892 McElroy
1914368 June 1933 Goodall
3831984 August 1974 Kutina et al.
Patent History
Patent number: D249804
Type: Grant
Filed: Sep 21, 1977
Date of Patent: Oct 3, 1978
Inventor: Howard Archibald Treloar (Mitcham, South Australia)
Primary Examiner: James R. Largen
Attorney: Eric Waters
Application Number: 5/835,292
Classifications
Current U.S. Class: D23/43
International Classification: D2301;