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. 02, 1988
Filed:
Aug. 05, 1986
Alexandr D Kostylev, Novosibirsk, SU;
Boris B Danilov, Novosibirsk, SU;
Boris N Smolyanitsky, Novosibirsk, SU;
Vladimir P Boginsky, Novosibirsk, SU;
Jury N Syryamin, Novosibirsk, SU;
David I Kogan, Moscow, SU;
Oleg V Smirnov, Moscow, SU;
Yacheslav N Saveliev, Moscow, SU;
Institut Gornogo Dela Sibirskogo Otdelenia Akademii Nauk Sssr, Novosibirsk, SU;
Abstract
The annular air-hammer apparatus for drilling holes comprises a shell hav fitted co-axially therein a chips-receiving sleeve, a hollow cylindrical case, and a ring-shaped hammer capable of reciprocating back and forth. The lower part of the shell accommodates a rock-cutting tool capable of moving axially with at least one blow-off passage formed by at least a single longitudinal groove made on the outer cylindrical surface of the rock-cutting tool. With the rock-cutting tool in its uppermost position, the blow-off passage communicates with an outlet space provided between the shell and the case.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile