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:
Sep. 13, 1988
Filed:
Apr. 22, 1986
Applicant:
Inventors:
Kiyoyasu Ohkawa, Tokyo, JP;
Masao Murakawa, Saitama, JP;
Assignee:
Amino Iron Works Co., Ltd., Fujinomiya, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23F / ; B23F / ; B23F / ;
U.S. Cl.
CPC ...
409 60 ; 409904 ; 409282 ; 291592 ;
Abstract
A press for manufacturing helical gears having a punch with a cutting edge; a die with a cutting edge, one of the cutting edges being shaped as a helical gear and the other having a shape corresponding to the shape of the one cutting edge; and a bolster rotatable about an axis and provided with one of the die and the punch. The die and said punch are pressed together and the bolster is rotatably driven by a driving element in response to a lead of a helical gear to be manufactured. The stroke of the punch is detected and a desired rotation angle of a driving element is calculated and then signalled to the driving element.