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. 20, 1998
Filed:
May. 23, 1997
Peter Collingborn, Gillingham, GB;
Lucas Industries, Plc, Solihull, GB;
Abstract
The present invention relates to a radial piston pump, and more particularly to a radial piston pump suitable for delivering liquid at a high pressure and at a volumetric output rate which can be controlled independently of the speed of rotation of the pump drive shaft. A radial piston pump(1) is provided which comprises a multiplicity of radially extending cylinders(14) each of which is provided with a radially moveable pumping plunger(15) to define, within the cylinder, a pumping chamber(16) which may be increased in volume by a movement of its associated plunger(15) in one direction to receive a liquid to be pumped and may be reduced in volume by movement of its associated plunger(15) in the opposite direction to deliver a liquid at high pressure to an output line. The pump(1) also comprises means for selectively disabling one or more of the pumping chambers(16) so that the or each disabled pumping chamber delivers no pumped fluid to the output line. The arrangement of the present invention has the advantage over the prior art of providing a reduction in the variation of drive torque.