Sight glass for sprinkler system lines

- United Brass Works, Inc.

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Description

FIG. 1 is a left front perspective view of an embodiment of a sight glass for sprinkler system lines showing my new design;

FIG. 2 is a front view thereof, the opposite side being the mirror image thereof;

FIG. 3 is a left end view thereof;

FIG. 4 is a right end view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a left front perspective view of a second embodiment of the design;

FIG. 7 is a front view thereof, the opposite side being the mirror image thereof;

FIG. 8 is an left end view thereof;

FIG. 9 is a right end view thereof; and,

FIG. 10 is a bottom view thereof.

Referenced Cited
U.S. Patent Documents
D256000 July 22, 1980 Molijn
D315526 March 19, 1991 Esau
4788929 December 6, 1988 Krause et al.
Other references
  • Photocopy of catalog sheet of Grainger; p. 3096; date unknown but believed to be prior art. Photocopy of catalog sheets of McMaster-Carr; pp. 1238-1239; date unknown but believed to be prior art. Photocopy of drawing of United Brass Works, Inc. illustrating part No. 850020; dated Oct. 25, 1996.
Patent History
Patent number: D412454
Type: Grant
Filed: Apr 16, 1998
Date of Patent: Aug 3, 1999
Assignee: United Brass Works, Inc. (Randleman, NC)
Inventor: Michael A. Berkelhammer (Greensboro, NC)
Primary Examiner: Antoine Duval Davis
Law Firm: Rhodes, Coats & Bennett, LLP
Application Number: 0/86,615
Classifications
Current U.S. Class: Element Or Attachment (4) (D10/103); Volume, Flow Or Rate (D10/96)
International Classification: 1004;