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:
Feb. 01, 1977
Filed:
Jun. 04, 1975
Richard H Doyle, Mount Prospect, IL (US);
Salvatore L Morabito, Northlake, IL (US);
Andrew I Yohana, Des Plaines, IL (US);
Raymond F Novak, Schiller Park, IL (US);
Duo-Fast Corporation, Franklin Park, IL (US);
Abstract
An electric fastener driving tool includes a body of clamshell construction formed of two, similar, molded plastic body parts. The body includes a head portion and a handle portion, and a magazine for supplying fasteners to be driven is supported by the base of the head portion and by the handle. Walls and projections integral with the body parts define a solenoid chamber within the head cavity and support a switch and circuit board within the handle. The body is held in assembled condition and the magazine is attached to the body by bolts of equal length. A solenoid with a central axial opening is mounted in the solenoid chamber. An armature formed of magnetic and nonmagnetic, electrically insulated segments is slidably mounted in the axial solenoid opening. A spring contacting an integral body wall and the insulating armature segment biases the armature in the return direction. A driver blade carried by the armature may be attached in electrically insulated fashion, and moves in a drive path into which fasteners are supplied from the magazine. A circuit including a switch controls energization of the solenoid, and a switch operating assembly provides for fail-safe operation and prevents unintentional multiple firing.