US 4,821,937 AGranted

Guide for fastener driving tool

AssigneeDuo-Fast Corporation

InventorJohn P. Rafferty

Life of this patent

Estimating the term…

Loading patent…

Abstract

A guide assembly mounted on a fastener driving tool locates the tool a predetermined distance from the edge of hardboard siding or a similar workpiece and assures that a fastener is driven into the workpiece the correct distance. The tool includes a housing having a nose defining a drive track and a driver blade for driving fasteners along the drive track into the workpiece. A safety member moves relative to the housing between a workpiece responsive position extending beyond the nose and an operating position, and a spring urges the safety member toward the workpiece responsive position. The guide assembly includes a yoke with a central portion adjustably mounted to the safety for controlling fastener penetration. A pair of laterally extending arms carry edge guides to locate the tool spaced from the workpiece edge in either of two different tool orientations. The edge guides are retractable so that one may be retracted when the other is used, or so that both may be retracted if neither is used. The edge guides are biased to a projecting position with a force smaller than the safety biasing spring force so that the guide assembly does not interfere with operation of the safety.

Claims11

Dependent claims

A fastener driving tool comprising;

a housing having a nose defining a drive track and having a driver element for driving fasteners in a given direction along said drive track into a workpiece;
a safety member carried by said housing for movement relative to said housing in said given direction between a workpiece responsive position extending beyond said nose and an operating position;
safety biasing means operatively connected between said housing and said safety member for urging said safety member toward the workpiece responsive position;
and
a workpiece responsive guide assembly for positioning the tool relative to a workpiece, said guide assembly characterized by:
a guide member;
adjustable mounting means supporting said guide member on said safety member adjacent said nose for adjustably mounting said guide member in a selected one of a range of positions arrayed in said given direction for limiting the depth to which a fastener is driven into a workpiece;
an arm extending from said nose in a direction transverse to said given direction;
an edge guide carried by said arm and extending in said given direction beyond said safety member for locating said nose a predetermined distance from an edge of the workpiece;
said edge guide being movably mounted on said arm and retractable in said given direction from a normal position to a retracted position to permit said nose to be located farther than said given direction from the edge of a workpiece;
and
guide biasing means operatively connected between said arm and said edge guide for biasing said edge guide to said normal position.

9 more elements

Dependencies are inferred from the claim text.