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:
May. 28, 2019
Filed:
Jun. 11, 2013
Koninklijke Philips N.v., Eindhoven, NL;
Tyler G. Kloster, Snoqualmie, WA (US);
KONINKLIJKE PHILIPS N.V., Eindhoven, NL;
Abstract
An oral care appliance () having a pump assembly () for delivering discrete bursts or shots of liquid. The pump assembly includes a pump housing () and an inlet/outlet assembly () at a forward end of the housing, including one-way valves () in the inlet and outlet openings. A plunger sleeve () is positioned within the housing with a central opening () in a fluid-tight relationship with the inlet and outlet assembly. A plunger () includes a center portion (), positioned in the central opening of the plunger sleeve in a fluid-tight relationship therewith. The plunger sleeve includes an outer member () between the plunger sleeve and the internal surface of the housing. A compressible spring () is positioned between a forward end of the outer member of the plunger and the rear end of the housing. A drive mechanism () moves the plunger rearwardly, resulting in the plunger sleeve filling with liquid by vacuum action from a reservoir () in the appliance, and then releases the plunger, allowing the spring to move the plunger quickly forward, forcing liquid in the plunger sleeve out through the fluid outlet in a direct burst.