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:
Mar. 01, 2011
Filed:
Jul. 02, 2009
Shlomo Greenwald, Ithaca, NY (US);
Zipora Greenwald, Ithaca, NY (US);
Shlomo Greenwald, Ithaca, NY (US);
Zipora Greenwald, Ithaca, NY (US);
Other;
Abstract
A disposable pump for a collapsible reservoir has an upper chamber, a lower chamber and a seal base in between. The upper and lower chambers have flexible sections or bellows that expand or contract the chambers, and the seal base has a rigid rod that selectively forms a seal on an opening in the seal base between the upper and lower chambers. One of the two chambers has a nozzle and the other chamber has a top cap that leads in many embodiments to a collapsible bag reservoir. In at least one embodiment a solenoid overcomes the biasing force of a compression spring and lifts the seal base off the rigid rod. This opens the seal and assisting pushing out potentially very viscous liquids into the chamber that includes the nozzle and the liquid ultimately dispenses from the pump through the nozzle.