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:
Jun. 17, 1986
Filed:
Jul. 25, 1985
Peter Jochum, Meiningen, AT;
Hilti Aktiengesellschaft, Fevstentum, LU;
Abstract
In an explosive charge operated device for driving fastening elements into a receiving material, a throttling device is arranged for conveying explosive gases from a barrel out of the device housing. The throttling device is a tubular member containing a displaceable nozzle needle. The position of the nozzle needle controls the flow of gas out of the tubular member. When an explosive charge is fired, the barrel is axially displaceable opposite to the direction for driving a fastening element from the device. As the barrel is displaced the throttling cross-section through the throttling member is increased as the throttling member is displaced so that the outflow of the explosive gases and the peak values of the sound level is considerably reduced as compared to similar previously known devices.