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:
Feb. 26, 2013
Filed:
Oct. 31, 2008
John Ramunas, Stanford, CA (US);
Juan G. Santiago, Stanford, CA (US);
David P Fenning, San Juan Capistrano, CA (US);
Viktor Shkolnikov, Chatsworth, CA (US);
John Ramunas, Stanford, CA (US);
Juan G. Santiago, Stanford, CA (US);
David P Fenning, San Juan Capistrano, CA (US);
Viktor Shkolnikov, Chatsworth, CA (US);
The Board of Trustees of the Leland Stanford Junior University, Palo Alto, CA (US);
Abstract
In a pump, a flexible tube passes through the pump and is held 'normally closed' at an output constriction. The pump includes a pump body and a pump member that can perform two functions by their relative motion. The first function is to open and close an input constriction of the flexible tube. The second function is to compress the section of flexible tube between the input constriction and the output constriction. This section of tube acts as the pump chamber. When closed, the input constriction provides a greater impediment to fluid flow than the output constriction. Therefore, when the input constriction is closed and the pump chamber is compressed, fluid flows out of the pump past the output constriction. When the input constriction is open and compression of the pump chamber is removed, the output constriction closes and fluid can enter the pump by flowing past the location of the input constriction.