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:
Jan. 18, 1983
Filed:
Feb. 10, 1981
Peter Jochum, Meiningen, AT;
Franz Buechel, Ruggell, LI;
Hilti Aktiengesellschaft, Schaan, LI;
Abstract
A setting device arranged to use caseless propellent charges for driving fastening elements, such as bolts, nails and the like, into a hard receiving material includes a casing containing an axially slidable barrel forming a feed element at its rearward end. A counterpressure member is slidably movably supported within the casing and in combination with the end face of the feed element forms a combustion chamber for the caseless propellent charges. When the feed element is displaced rearwardly and forms a part of the combustion chamber, a ring located within the housing encircles its outside surface. The ring has a radially outer frusto-conical surface in contact with a complementary frusto-conical surface on the housing. When a caseless propellent charge is fired, propellent gases contact the ring and displace it along the frusto-conical surface on the casing causing it to be forced into sealing contact with the outside surface of the feed element.