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:
Apr. 19, 1977
Filed:
Dec. 23, 1974
Jack Anderson, Twinsburg, OH (US);
Allied Steel & Tractor Products, Incorporated, Cleveland, OH (US);
Abstract
An air hammer having a main body including an elongated cavity with a ram slidably mounted therein. The ram is driven by compressed air delivered through inlet means to the cavity in such a way as to drive the ram up and down to impact a tool. Exhaust from the hammer is directed into a plurality of elongated expansion chambers which are positioned within the body of the hammer. The expansion chambers extend to each end of the hammer body and exhaust to the atmosphere through open ports. Inserts are placed within the elongated expansion chambers to divide the chambers into properly sized cavities for greatest sound attenuation. Holes extend through these inserts for the eventual passage of exhausting air therethrough. The inserts are of neoprene having a durometer hardness of from 75 to 90. The size of the expansion chambers and the configuration and positioning of the inserts are intended to provide a muffling of the noise and shock of the exhaust. A shut off system is also provided to stop the hammer when it is unloaded.