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:
Nov. 23, 1993
Filed:
Dec. 29, 1992
Frank C Howard, Mount Prospect, IL (US);
Robert J Berry, Waukegan, IL (US);
Illinois Tool Works Inc., Glenview, IL (US);
Abstract
In a fastener-driving tool comprising a housing structure defining an axis and a nosepiece extending from the housing structure, a primary actuating structure is movable between a tool-disabling position and a tool-enabling position, and a secondary actuating structure is coactive with the primary actuating structure for moving the primary actuating structure to the tool-enabling position when the secondary actuating structure is pressed firmly against a workpiece. The primary actuating structure is biased to the tool-disabling position by a primary spring or springs. The secondary actuating structure is biased away from the primary actuating structure by secondary springs. When the secondary actuating structure is pressed firmly against a workpiece, the primary spring or springs exhibit a biasing force less than the biasing force exhibited by the secondary springs. The secondary actuating structure may also be biased away from the housing structure by a tertiary spring.