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:
Apr. 22, 1997
Filed:
Mar. 01, 1996
Helge Frank, Hamburg, DE;
Daimler-Benz Aerospace Airbus GmbH, Hamburg, DE;
Abstract
Freeze-up is prevented in a tap pipe connectable to a main liquid supply line, by a liquid circulator directly inside the tap pipe. The liquid circulator is either a Pitot tube that takes advantage of the liquid flow in the main line to establish a circulation in the tap line, or the liquid circulator is a driven pump directly in the tap line. The pump is driven by an electric motor or by a turbine rotor. The turbine rotor may be an axial flow wheel, or a paddle wheel driven by the liquid flow in the main line for driving the pump. The pump itself may be a paddle wheel. The Pitot tube, the turbine rotor, and the paddle wheel are very energy efficient by using the flow or dynamic head in the main line.