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. 21, 1986
Filed:
Jul. 16, 1982
Karl Haide, Friedrichshafen, DE;
Abstract
A self-priming centrifugal pump wherein an external formation of a mixture formed of a storage liquid and drawn-in air from a suction line begins during a priming operation. The mixture is conveyed into a venting chamber arranged above a pump impeller wherein the air is at least partially separated and the liquid is recycled into two partial quantities to a pump volute to repeat the mixture formation. The first partial quantity is conducted to the pump volute by way of a backflow duct and a nozzle. The second partial quantity passes through a stilling chamber and surrenders or releases any residual amount of air contained in the second partial quantity. A connection between the stilling chamber and pump volute terminates into the pump volute downstream of the nozzle and is exposed by the nozzle jet in an ejector-type manner thereby enabling the accomplishment of a rapid venting of the suction line during the priming operation as well as an achievement of a high degree of efficiency and delivery during a liquid conveying process by the pump.