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:
Jul. 18, 1995
Filed:
Sep. 01, 1993
Emory J Clark, Spokane, WA (US);
Robert J Warner, Veradale, WA (US);
Spring Line, Inc., Spokane, WA (US);
Abstract
A self-centering impact hand tool 10 has a forward tool member 14 with an elongated forward tool body 15 extending from a tool tip 17 to an anvil surface 19 at a rear end 18. The hand impact tool 10 has a plunger member 40 with an elongated forward end 44 having an anvil surface 46 for engaging the anvil surface 19. An elongated coil spring 60 has reduced diameter spring ends 64 and 66 mounted in corresponding spring latching grooves 22 and 54, respectively. Each of the members 14 and 40 have finger gripping sections 21 and 52 that are formed with a series of annular grooves 80 forming finger rings 82 for enabling the user to easily grip and hold the tool member 14 during the operation of the tool and the expansion of the coil spring prior to the release of the plunger member 40. Upon release of the plunger member, the anvil surface 46 of the forward end 44 is driven into a rear section 36 of a driving piston 33 to drive a brad, or nail or center punch rapidly and forcefully into a work surface 12. The number of rings 82 in the finger gripping section 52 is less than the number of rings 82 of in the finger gripping section 21 to minimize premature release of the forward tool member prior to the release of the plunger member 40.