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. 25, 1995
Filed:
Nov. 22, 1993
Applicant:
Inventor:
Ulrich Demuth, Idstein, DE;
Assignee:
Black & Decker Inc., Newark, DE (US);
Primary Examiner:
Int. Cl.
CPC ...
B25D / ;
U.S. Cl.
CPC ...
173109 ; 173201 ; 173 48 ;
Abstract
A rotary hammer with a pneumatic hammer mechanism has a reciprocatable piston driven in a guide tube, which piston, through alternating development of overpressure and underpressure at its rear side, moves a ram forward to create an impact on the rear end of the bit and back again, the front side of the ram being connected to the surrounding air via at least one vent opening. The at least one vent opening is at least partially closeable to create a pressure countering the forward movement of the ram.
Demuth, Ulrich. (1995). Rotary hammer with a pneumatic hammer mechanism (U.S. Patent No. 5435397). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5435397
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile