Two-stage pump

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Description

FIG. 1 is a perspective view of a two-stage pump showing our new design;

FIG. 2 is a side elevational view thereof;

FIG. 3 is an elevational view of the opposite side thereof;

FIG. 4 is an end elevational view thereof;

FIG. 5 is an elevational view of the opposite end thereof;

FIG. 6 is a top plan view thereof; and

FIG. 7 is a bottom plan view thereof.

Referenced Cited
U.S. Patent Documents
D110935 August 1938 Voorhees et al.
D202145 August 1965 Schroeder et al.
D229236 November 1973 Doolin
4257747 March 24, 1981 Goldman
Other references
  • Nash.RTM. Multistage Vacuum Pumps, Bulletin No. 499-C, Copyright 1974 The Nash Engineering Company.
Patent History
Patent number: D285447
Type: Grant
Filed: Dec 5, 1983
Date of Patent: Sep 2, 1986
Assignee: The Nash Engineering Company (Norwalk, CT)
Inventors: Carl G. Dudeck (Newtown, CT), Richard A. Lametto (West Redding, CT)
Primary Examiner: Wallace R. Burke
Assistant Examiner: Lynn Wilder
Application Number: 6/557,943
Classifications
Current U.S. Class: Pump Or Compressor (D15/7)