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US Patent: 1,035,974
Valve Spring Releaser and Retainer
Edwin N. Kraemer - Cedarburg, WI

USPTO Classifications:
269/228, 29/218

Tool Categories:
specialty tools : valve spring tools

United States Compass Co. - Cedarburg, WI

United States Compass Co. - Cedarburg, WI

L. G. Thenier
Katherine Holt
C. H. Keeney

Patent Dates:
Applied: May 24, 1911
Granted: Aug. 20, 1912

Patent Pictures: [ 1 | 2 ]
Edwin N. Kraemer patent Aug. 20, 1912
USPTO pdf tiff
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The wing nut opens and closes the jaws through the operation of a screw and intermediate links. The device compresses automotive valve springs to enable removal of the "keeper," and holds the spring compressed until it can be reinstalled.

Some contemporary ads show a Chicago distributor; other listings show the Wisconsin manufacturer.

Improved by patent no. 1,147,804 granted July 27, 1915. Referenced in patent no. 1,198,281 granted Sept. 12, 1916.

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