Piston vacuum pump

- Sigma Tek
Description

FIG. 1 is a perspective view of the piston vacuum pump showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a front end elevational view thereof;

FIG. 5 is a rear end elevational view thereof;

FIG. 6 is a left side elevational view thereof; and

FIG. 7 is a right side elevational view thereof.

Referenced Cited
U.S. Patent Documents
D45026 December 1913 Sparks
D223686 May 1972 Sadler et al.
D263839 April 13, 1982 Somme
Patent History
Patent number: D271976
Type: Grant
Filed: Dec 31, 1981
Date of Patent: Dec 27, 1983
Assignee: Sigma Tek (Wichita, KS)
Inventor: Forest G. Brown (Valley Center, KS)
Primary Examiner: Wallace R. Burke
Assistant Examiner: Lynn Wilder
Attorney: Harold E. Meier
Application Number: 6/336,368
Classifications
Current U.S. Class: Pump Or Compressor (D15/7)
International Classification: D1502;