Filter flow indicating device

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Description

FIG. 1 is a top plan view of a filter flow indicating device showing my new design;

FIG. 2 is a front elevational view of FIG. 1 the rear being substantially a mirror image thereof;

FIG. 3 is a left side end elevational view thereof;

FIG. 4 is a right side end elevational view thereof.

Referenced Cited
U.S. Patent Documents
D195226 May 1963 Busillo
D256000 July 22, 1980 Moljin
828108 August 1906 Graham
1631746 June 1927 Luckey
2970561 February 1961 Ashwood
3152475 October 1964 Ford
3585963 June 1971 Hiszpansky
3805611 April 1974 Hedland
4373528 February 15, 1983 Harle
4619139 October 28, 1986 Rosaen
Other references
  • New Equip. Digest-1/78-p. 46-Flowmeters at center. Hedland Products brochure-1/80, pp. 1-3-Flowmeters.
Patent History
Patent number: D297716
Type: Grant
Filed: Nov 6, 1985
Date of Patent: Sep 20, 1988
Inventor: Lars O. Rosaen (Plymouth, MI)
Primary Examiner: Nelson C. Holtje
Law Firm: Gifford, Groh, VanOphem, Sheridan, Sprinkle and Dolgorukov
Application Number: 6/803,898
Classifications
Current U.S. Class: Volume, Flow Or Rate (D10/96)