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. 08, 2001
Filed:
Jun. 17, 1998
Stefan Ritsche, Radolfzell, DE;
Esther Amann, Radolfzell-Guettingen, DE;
Ing. Erich Pfeiffer GmbH, Radolfzell, DE;
Abstract
An inlet valve (,) of a dispenser (,) or thrust piston pump, for highly reliable and speedy valve function in all vertical or inclined positions of the dispenser (,) includes, nearer to the pump chamber (,), a valve ball (,) operating in response to pressure and, further away from the pump chamber (,), a valve ball (,) subject to the force of gravity. Ball (,) pushes ball (,) out of its seat (,) in the event that it is firmly seated in the seat (,) due to a vacuum in the reservoir (,) when the dispenser (,) is turned upside down. The seats (,) for the two valve balls (,) are formed by a radially deformable wall (,), which can be tightly and sealingly supported against balls (,).