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:
Aug. 20, 2013
Filed:
Dec. 19, 2007
Bengt I. Larsson, Skivarp, SE;
Marie Hakansson, Malmo, SE;
Bengt I. Larsson, Skivarp, SE;
Marie Hakansson, Malmo, SE;
Dresser, Inc., Addison, TX (US);
Abstract
A fluid pump for a fuel dispensing unit comprises a pump housing with a first chamber and a second chamber, each chamber having a fluid inlet valve and a fluid outlet valve, respectively. The chambers are separated by a movable piston arranged to repeatedly decrease and increase the volumes of the chambers. The piston comprises a magnetic device, and an electromagnetic control configured to move the piston by altering a magnetic field, for repeatedly decreasing and increasing the volume of the chambers. A controllable fluid flow passage connected to first chamber and to the second chamber that allows fluid to pass from the first chamber to the second chamber without passing through the any of the fluid inlet valves or the fluid outlet valves so that when there is a flow of fuel from the first chamber to the second chamber via the fluid flow passage and when the piston moves towards the first side the first outlet valve and the second inlet valve remain closed during operation.