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:
Apr. 25, 2006
Filed:
Jul. 18, 2005
Paul Kirsch, Castro Valley, CA (US);
Paul Kirsch, Castro Valley, CA (US);
Other;
Abstract
A pneumatic tool () for impacting a workpiece () is provided. The tool () comprises a casing () defining a chamber (). A piston () is slidable within the chamber () along an operational axis (A). An exhaust valve (), controlled by a pilot valve (), slides the piston () by selectively introducing and releasing pressurized fluid into and out from the chamber (). A tool bit () is slidable within the chamber () to impact the workpiece (). Kinetic energy is transferred to the tool bit () from the piston () via an impact from the piston () as the piston () slides within the chamber (). A shock absorbing valve () includes a floating collar () that is slidable along the casing () between two seal rings (). A handle () is mounted to the floating collar (). The floating collar () reciprocates along the casing () as fluid envelopes () are exposed to atmosphere in an alternating manner through exhaust ports () in the floating collar () to reduce pressure in the fluid envelopes () thereby reducing shock to a user grasping the handle ().