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:
Jan. 08, 1985
Filed:
Oct. 25, 1982
Applicant:
Inventors:
Katsuhiko Kasuya, Ibaraki, JP;
Hidetomo Mori, Ibaraki, JP;
Mitsuru Fujiwara, Ibaraki, JP;
Tetsuzo Matsunaga, Ibaraki, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F01C / ; F01C / ;
U.S. Cl.
CPC ...
418201 ;
Abstract
Rotor tooth forms for a pair of screw rotors in the form of a female rotor and a male rotor, wherein the female rotor has a rotor tooth form including a flank of a surface of advance constituted by an arc and a second order curve, and a flank of a surface of retrocession constituted by a curve generated by an arc of a forward end portion of a lobe on the male rotor and an arc, and the male rotor has a rotor tooth form essentially formed by generating loci of the flank of the surface of advance of the female rotor and the flank of the surface of retrocession thereof.