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. 29, 1976
Filed:
Mar. 06, 1975
James A Swisher, Easton, CT (US);
Other;
Abstract
Impact driven tools of the type generally comprising a bitter end bounded by a collar and a shank and a tip are provided with internal silencing means comprising an opening in the bitter end, said opening filled with a sound attenuating material, which is preferably steel shot loosely packed in the opening and retained therein by a force fit plug secured by a weld. The opening is preferably axial and extends through the bitter end to or below the collar. In large diameter impact driven tools multiple openings are provided parallel to the axis and terminating at staggered points. Each such hole is filled with a sound attenuating material, such as steel shot. The rams of impacting apparatus, or air hammers, are also provided with internal silencing means comprising at least one opening, each such opening being filled with sound attenuating material, which is preferably steel shot loosely packed and retained by a force fit plug secured by a weld.