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. 16, 1987
Filed:
Dec. 16, 1985
Robert A Ingalls, Springfield, VT (US);
Other;
Abstract
Helical screw rotors for a screw rotor machine having improved profiles on both male and female rotors, wherein the female rotor leading and trailing flanks comprise first and second circular arcs with the first circular arc subscribed by a first radius whose center lies inside the pitch circle and a second circular arc subscribed by a second radius whose center also lies inside the pitch circle. The leading and trailing flank portions of the male rotor are travel generated by first and second radii on the female rotor resulting in effective driving and driven lobe surfaces on the leading and trailing lobe surfaces. This also results in minimized blowholes and effective sealing surfaces on the intake and discharge sides of the screw rotor machine. The female rotor lobes have a main peripheral surface defined by a true circular arc swung from the axis of the female rotor.