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:
Oct. 11, 1983
Filed:
Jan. 06, 1982
Pius J Nasvytis, Avon, CT (US);
George W Jahrstorfer, South Windsor, CT (US);
Chandler Evans Inc, West Hartford, CT (US);
Abstract
A high speed fuel pump for a gas turnbine engine has a positively-driven shroud (28) positioned between a main impeller (14) and the wall of a pumping cavity (12) to reduce impeller drag. The shroud is formed by a first disc (30) having a boost impeller (36) connected to its central hub portion 30a and a second disc (32) having a gear (32b) carried by its central hub portion (32a). The main drive shaft assembly (24), to which the main impeller is connected, carries a gear (64) which meshes with gear (62) mounted upon a shaft (58). The shaft (58) also carries a gear (56) which meshes with the gear 32b. The gears are sized so that the shroud is driven at one-half the speed of the main impeller in order to maximize impeller drag reduction and enhance pumping capability when severe inlet conditions are present at the pump inlet (10).