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. 17, 1978
Filed:
Jun. 10, 1974
James D Mangus, Greensburg, PA (US);
Westinghouse Electric Corporation, Pittsburgh, PA (US);
Abstract
Apparatus as disclosed for eliminating drawdown of the level of liquid in a sump suction type of pump having a cover gas above the liquid therein. The liquid level is maintained throughout all pump operating speeds and without the need to vary the cover gas pressure of the pump. The pump includes a divider plate which separates the sump tank into upper and lower chambers. When the speed of the pump increases, the divider plate serves to limit the amount of liquid flowing therepast. An orifice flow tube connects the pump outlet to the upper chamber of the sump tank. Thus, the leakage flow past the divider plate is pumped back into the upper chamber thereby automatically compensating for the effect of pump drawdown.