Countersinking tool

Details Countersinking tool Countersinking tool

2005-06-07

2005-06-07

Jones, David (Department: 3725)

Metal deforming

By tool-couple embodying nonplanar tool-face

With complementary tool-faces

C072S412000, C072S454000

Reexamination Certificate

active

06901784

ABSTRACT:
A countersinking tool for countersinking openings into a hollow metal door frame in order to insert wall anchors through the openings to lie flush with the door frame. The countersinking tool has two parts. The nut is a base with a threaded opening extending lengthwise through its center. The bolt has a hexagonal-sided top that tapers to a threaded screw insertable into the threaded opening of the nut.

REFERENCES:
patent: 2226852 (1940-12-01), Dobrick
patent: 2292446 (1942-08-01), Huck
patent: 2423957 (1947-07-01), Amtsberg
patent: 4445264 (1984-05-01), Banerian
patent: 4495687 (1985-01-01), Sieveking
patent: 4761987 (1988-08-01), Gamauf
patent: 5230237 (1993-07-01), Johansson

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