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. 02, 1990
Filed:
Feb. 11, 1988
Bernard Zimmern, East Norwalk, CT (US);
Other;
Abstract
In a positive displacement machine, a rotor has screw grooves in which pressure chambers are variably limited, at one end, by teeth of a plastic pinion which is the front element of a composite pinion meshing with the grooves. A metal backing pinion supports the plastic pinion. The metal pinion and plastic pinion are rotatable with respect to each other about the axis of rotation of the composite pinion, in conjunction with a deformation of a resilient angular coupling provided between them. This coupling is a metal blade at least partly surrounding the backing pinion shaft between the plastic pinion and the backing pinion, in a groove of the backing pinion. One end of the blade is secured to the plastic pinion, the other end of the blade is secured to the backing pinion. Several embodiments of the blade are disclosed.