US 4,197,974 A · Nailer

Abstract

A nailer for repeatively driving nails one at a time into material. A safety yoke including an integral safety yoke lever cams against a safety yoke pin in the body of the nailer and actuates a secondary trigger pivotally mounted in a trigger. The secondary trigger actuates a valve plunger in a trigger valve assembly releasing the air over a poppet assembly, causing downward movement of a pneumatic piston assembly carrying a driver blade driving a nail held in a channel guide of a nose into the material. A plurality of tabs on the nose mechanically engage and frictionally lock a nail magazine to the nose. A scroll spring assembly affixes to the nose and biases a pusher in an adjacent track of the magazine towards the nose. A safety yoke detent biased away from the nose moves forwardly into a detent notch in the safety yoke by the pusher when the supply of nails remaining in the magazine reaches a predetermined number.

A nailer supporting a magazine means which dispenses nails successively from a plurality of nails for repeatively driving one nail at a time into material comprising:

a. means supporting a pneumatic system including a cylinder assembly, a piston assembly mounted within said cylinder assembly and having a driver blade attached to said piston assembly in said cylinder assembly, a poppet assembly covering said cylinder assembly, and a means connected between source means of compressed air and said pneumatic system to valve said compressed air to said poppet assembly;
b. trigger means pivotally mounted on said support means to actuate said valve means;
c. nose means connected to said support means to guide a nail driven by said driver blade into said material, said nose means including at least one elongated boss means on said nose means and plate means secured to said boss means;
d. magazine means attached to said nose means to magazine a plurality of nails and successively dispense one nail at a time into said nose means;
e. pusher means to bias said plurality of nails in said magazine means towards said nose means and traveling adjacent to said magazine means, said pusher means including a pusher body having upper and lower pusher rail tabs, a pusher track adjacent said magazine means and spring means mounted between said nose means and said pusher means;
f. safety yoke means including at least one elongated hole means movably slidable on said nose means between said nose means and said plate means and means biasing said safety yoke means away from said support means;
g. means positioned between said safety yoke means and said trigger means to cam said trigger means, thereby permitting said trigger means to actuate said valve means;
and,
h. safety yoke detent means slidably within said magazine means, means biasing said safety yoke detent means away from a detent notch in said safety yoke means when more than a predetermined number of nails is magazined in said magazine means, whereby when said nose means is positioned at a point of nailing and pressure is exerted against said support means by an operator, said safety yoke means slidably moves upwards on said nose means between said plate means and said nose means to actuate said cam means against said trigger means and when said trigger means is actuated, said trigger means actuates said valve means, passing compressed air through said valve means from said poppet assembly to move said driver blade carried on said piston assembly into said nose means thereby driving said nail into said material, said pusher tabs ride in said pusher track adjacent said magazine means and said spring means biases said pusher means towards said nose means on said pusher track thereby biasing said nails in said magazine means towards said nose means and said pusher means actuates said safety yoke detent means into said detent notch and said safety yoke means when a predetermined number of nails remain in said magazine means and said nose means.

6 more elements

Nailer

Life of this patent

Nailer

Life of this patent

Abstract

Claims29