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:
Mar. 23, 1976
Filed:
Feb. 01, 1974
George J Ovanin, Euclid, OH (US);
The S-P Manufacturing Corporation, Solon, OH (US);
Abstract
A rotary jaw chuck work holder for a machine tool or the like, with a central opening through which stock is fed and a detector sensitive to the presence of sufficient stock for safe gripping by the chuck jaws beyond the opening. A rod is movable by air pressure in a passage of the chuck that communicates with the central opening. The extent to which the rod moves depends upon the presence or absence of a workpiece in the central opening. Air is supplied to the rod passage of the work holder through an annular manifold part of which is movable into contact with the work holder in response to air flow to the manifold. When moved against the work holder, the manifold supplies air to the rod passage without regard to the rotational position of the work holder. In the absence of sufficient stock, the air pressure will move the rod to a position that vents the rod passage, causing a loss in pressure that is sensed by a pressure responsive switch in a control circuit, which then prevents operation of the machine that rotates the work holder.