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. 14, 1992
Filed:
Sep. 20, 1990
Bernard Zimmern, East Norwalk, CT (US);
Other;
Abstract
The positive displacement rotary machine to compress or expand a fluid between a high and a low pressure comprises a screw provided with at least one groove, rotatably mounted in a casing and meshingly cooperating with at least one gaterotor carrying teeth which protrude into the groove to define with the casing a volume for variation of pressure of the fluid. One side of the teeth is being exposed to the high pressure fluid. The high pressure side of the teeth is in sealing proximity with a lip of the casing. The center of the gaterotor is hollow and carries bearings supporting the gaterotor for rotation around a fixed shaft extending through the rotor. Said shaft is secured to the casing in a portion thereof facing the high pressure side of the teeth by a key which has an axis substantially perpendicular to the shaft axis and is pressed against a flat portion provided on the shaft.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile