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. 15, 1994
Filed:
Mar. 15, 1993
Applicant:
Inventors:
Hiroshi Okada, Osaka, JP;
Tokujiro Nakamura, Osaka, JP;
Assignee:
Nippon Pneumatic Manufacturing Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B25D / ;
U.S. Cl.
CPC ...
173211 ; 1731621 ; 299 37 ;
Abstract
A shock-absorbing member is fixed to top brackets at the end of a boom opposite to the top of an impact tool. A stopper member is secured to one of the bottom of the shock-absorbing member and the top of the impact tool and the other of the same is formed with a guide recess in which the stopper member is vertically slidable. When the tip of the chisel of the impact tool is pressed hard against an object to be crushed, no turning force will be applied to vibration-damping support members which support the impact tool, thereby preventing the support members from breaking.