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:
Aug. 16, 1994
Filed:
Mar. 08, 1993
Applicant:
Inventor:
Toshio Mukai, Hamamatsu, 433, JP;
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
175293 ; 37904 ; 173 97 ;
Abstract
A hammer device is coupled to an outer portion of a handle, an operating portion is attached to the other portion of the handle, a holding section is attached to one side of the operating portion, and at the same time, a pair of excavators is rotatably attached to an outer portion of the holding section to conduct a bumping operation and opening and closing operations upon transmission from the operating portion. By this, burdens imposed on workers are reduced, at the same time, security of work is assured and time required for completion of works can be greatly shortened and reduced.