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:
Aug. 14, 1985
Hideaki Ikeda, Sumida-ku, Tokyo, JP;
Other;
Abstract
A surface-chiseling machine for refractory, concrete or other materials is disclosed, which includes a piston having at its one end a step portion and on a side periphery at its other end a through-hole, and a cylinder forming a first air chamber on a closed side of the step portion of the piston, forming an exhaust channel communicated with the through-hole of the piston and having an air hole for feeding a compressed air to the first air chamber. The cylinder at its rear end is closed with a back head for forming therein a second air chamber, while at its front end is closed with a front head which is provided with a plurality of chisel-inserting holes, into which are inserted chisels with their rear ends being contactable directly with a front face of the piston for providing a striking action on the chisels.