Precision self-actuated woodworking tool

Details Precision self-actuated woodworking tool Precision self-actuated woodworking tool

1988-07-06

1989-05-16

Watts, Douglas D.

Cutlery

Cutting tools

Chisel

30168, 30277, B23D 300, B26B 500

Patent

active

048296732

ABSTRACT:
A self-actuated woodworking tool [T] for one-handed reciprocating operation has a chambered haft [1] and a tool shank [4] carried captively axially within the haft in slidable, reciprocal relationship. A shank portion [5] extending forwardly from the haft has a cutting edge [6]. A haft ferrule [11] precisely orients the shank and so also the cutting edge angularly with respect to the haft. The haft cross-section permits the user to know by tactile feedback the angular orientation of the haft and thus also the cutting edge. A guide [10] carried by the shank within the chamber cooperates with the ferrule and provides low-friction sliding interengagement between the tool shank and walls of the chamber without radial displacement from the axis. The chamber [3] provides an internal contact surface [16] for hammer-like blows thereon against a shank butt [17] for driving the cutting edge against the workpiece. A kick-back spring [19] assists in reciprocation of the haft, which brings about self-actuated blade-cutting action on the workpiece.

REFERENCES:
patent: 1174785 (1916-03-01), Watts
patent: 1435866 (1922-11-01), McGahey
patent: 2485877 (1949-10-01), Hamilton et al.

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