The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 25, 1995
Filed:
Aug. 05, 1994
Richard L Hall, Lincolnton, NC (US);
Donald M Szymanski, Prospect, KY (US);
Vermont American Corporation, Louisville, KY (US);
Abstract
A hole saw having plug ejection feature. Using the arbor and arbor nut of the present invention, the arbor of an ordinary commercially available hole saw is replaced, the arbor nut of the present invention being threaded into the hole saw cup axial threaded inlet, to convert the ordinary hole saw into a plug ejecting hole saw. The arbor and arbor nut of the plug ejecting hole saw of the present invention function as the arbor of an ordinary hole saw when used with to drill the desired hole, the drill turning in a clockwise direction. When the drill rotation is reversed to a counter clockwise direction and the hole saw cup is held stationary, the arbor of the present invention screws through the also stationary arbor nut, thereby ejecting the plug from the hole saw cup.