Pipe coupling plug
United States Patent D482761

Gotoh, Kunihiko (Tokyo, JP)
Kitagawa, Hiroyuki (Tokyo, JP)
Application Number:
Publication Date:
Filing Date:
Nitto Kohki Co., Ltd. (Tokyo, JP)
Primary Class:
Other Classes:
D23/233, D23/260
Field of Search:
D23/233, 288/316, 288/275, 251/149.1, D23/260, 288/277, D23/259, 251/150, D23/262, D23/235
View Patent Images:
US Patent References:
5855227Quick-coupling fitting for pipes with an improved sealStucchi
D229416N/ALuckenbill et al.D23/262
D313067Quick release couplingKotake et al.
D329495Coupling for a medical agent tankKotake
D333179Pipe couplerMikiya et al.
D359797Pipe couplingSaito
D406881Socket of pipe couplingKuwabaraD23/262
D434834Plug for pipe couplingGoto
D442267Pipe coupling socketKoudaD23/262
D463537Plug of pipe couplingKozu et al.D23/262

Other References:
Copending U.S. Design Application “Pipe Coupling Socket” by Kunihiko Gotoh and Hiroyuki Kitagawa, filed Dec. 17, 2002.
Primary Examiner:
Taylor, Robin V.
Attorney, Agent or Firm:
Wenderoth, Lind & Ponack, L.L.P.
1. The ornamental design for pipe coupling plug, as shown and described.

FIG. 1 is a perspective view taken from the top, front and left side of a pipe coupling socket showing our new design;

FIG. 2 is a front elevational view thereof, the rear being a mirror image of the front;

FIG. 3 is a top plan view thereof, the bottom being a mirror image of the top;

FIG. 4 is a left side elevational view thereof; and,

FIG. 5 is a right side elevational view thereof.