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:
Jun. 23, 1987
Filed:
Nov. 12, 1985
John W Erickson, Huntington Beach, CA (US);
Dresser Industries, Inc., Dallas, TX (US);
Abstract
The improved pitot tube is useful in pitot type centrifugal pumps and is located within a rotor in the pump. The pitot tube projects radially from the axial center line of the pump and has an entry adjacent to the inside of the wall of the rotor. The entry is oriented circumferentially to receive fluid energized by the rotor. The pitot tube has a passageway therethrough which extends from the entry to an outlet located on the axial center line of the pump. Between the entry and outlet there is provided an entry transition portion that is curved to change the direction of flow from centrifugal to radial, a radial portion, and an outlet transition portion that is curved to change the direction of flow through the passageway from radial to axial. Located in the passageway are one or more ribs or vanes which are curved through the entry transition portion of the passageway and extend into the outlet thereof. The ribs provide for streamlining the flow to avoid turbulence to decrease the internal drag in the passageway and also to reinforce the pitot tube so that the walls thereof may be made substantially thinner whereby outside width of the tube can be decreased to reduce the external drag loss.