Combined filter and regulator unit for pneumatic circuits

Description

FIG. 1 is a top, rear and left side perspective view of a combined filter and regulator unit for pneumatic circuits showing our new design;

FIG. 2 is a right side elevational view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a rear elevational view thereof;

FIG. 7 is a top, front and left side perspective view of a combined filter and regulator unit for pneumatic circuits showing a second embodiment of our new design;

FIG. 8 is a top, front and right side perspective view of FIG. 6;

FIG. 9 is a top rear and right side perspective view of FIG. 6;

FIG. 10 is an enlarged top plan view of FIG. 6;

FIG. 11 is an enlarged bottom plan view of FIG. 6; and,

FIG. 12 is a rear elevational view of FIG. 6.

Referenced Cited
U.S. Patent Documents
D130447 November 1941 Tammen
D295674 May 10, 1988 Ogasawara et al.
D308571 June 12, 1990 Albertini et al.
4889544 December 26, 1989 Hsu
4957516 September 18, 1990 Daniels
Patent History
Patent number: D331961
Type: Grant
Filed: Apr 19, 1991
Date of Patent: Dec 22, 1992
Inventors: Carlos E. Ridolfi (1875 Wilde, Province of Buenos Aires), Higinio B. Ridolfi (1875 Wilde, Province of Buenos Aires)
Primary Examiner: Wallace R. Burke
Assistant Examiner: Lisa Lichtenstein
Law Firm: Keck, Mahin & Cate
Application Number: 7/687,537
Classifications
Current U.S. Class: Filter (D23/365)