Plate valve spring
Safford , et al. June 15, 1
U.S. patent number D336,509 [Application Number 07/460,720] was granted by the patent office on 1993-06-15 for plate valve spring. This patent grant is currently assigned to Cooper Industries, Inc.. Invention is credited to Gene R. Bluhm, George J. Safford.
| United States Patent | D336,509 |
| Safford , et al. | June 15, 1993 |
Plate valve spring
Claims
The ornamental design for a plate valve spring, as shown and described.
| Inventors: | Safford; George J. (Quincy, IL), Bluhm; Gene R. (Quincy, IL) |
|---|---|
| Assignee: | Cooper Industries, Inc.
(Houston, TX) |
| Appl. No.: | 07/460,720 |
| Filed: | January 4, 1990 |
| Current U.S. Class: | D23/249 |
| Field of Search: | ;D23/233-237,244-249 ;137/516.13-516.27 ;251/368 |
References Cited [Referenced By]
U.S. Patent Documents
| D217666 | May 1970 | Self |
| 2090486 | August 1937 | Richardson |
| 3123095 | March 1964 | Kohler |
| 3428082 | February 1969 | Kohler |
| 3875962 | April 1975 | Bauer |
| 4495964 | January 1985 | Bennitt |
| 4627464 | December 1986 | Hartshorn |
| 4854341 | August 1989 | Bauer |
| 4889156 | December 1989 | Woollatt et al. |
| 4913187 | April 1990 | Wollatt et al. |
| 5036880 | August 1991 | Safford et al. |
Attorney, Agent or Firm: Laff, Whitesel, Conte & Saret
Description
FIG. 1 is a top plan view of a plate valve spring showing our new design;
FIG. 2 is a left side elevational view thereof;
FIG. 3 is a right side elevational view thereof;
FIG. 4 is a rear elevational view thereof;
FIG. 5 is a front elevational view thereof; and,
FIG. 6 is a bottom plan view thereof.
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