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:
Aug. 23, 1977
Filed:
May. 24, 1976
Murray Berkowitz, Woodcliff Lake, NJ (US);
Curtiss-Wright Corporation, Wood-Ridge, NJ (US);
Abstract
The improved seal grid assembly is for a rotary compressor or expansion engine of the type having a rotor supported for planetation in a multi-lobe housing cavity and comprises, in combination with a non-rotating seal at the juncture of the housing lobes, a sealing means including a sealing surface movable between a retracted position where it is out of engagement with the peripheral wall and an extended position where it is in engagement with the peripheral wall of the housing cavity. A vent passage means is also provided in the rotor to communicate a space defined between the sealing means and rotor with the working chambers to conduct gaseous fluid which pressurizes said space so as to provide movement of the sealing surface of the associated seal means to the retracted position just prior to engagement with the non-rotating seal and to the extended position after such engagement with the non-rotating seals at each of the housing lobe junctures.