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:
Jan. 15, 2008
Filed:
Apr. 13, 2004
Marc L. Vitantonio, South Russell, OH (US);
Craig M. Saunders, Rocky River, OH (US);
Donald C. Fuchs, Jr., Mentor, OH (US);
Daniel J. Wanhainen, Twinsburg, OH (US);
Marc L. Vitantonio, South Russell, OH (US);
Craig M. Saunders, Rocky River, OH (US);
Donald C. Fuchs, Jr., Mentor, OH (US);
Daniel J. Wanhainen, Twinsburg, OH (US);
Power Sprayer LLC, Cleveland, OH (US);
Abstract
A battery operated, handheld fluid dispenser comprises a supply container having a body portion and a narrow neck extending upwardly therefrom. A pump and discharge unit is mounted on the upper end of the neck and comprises a pump diaphragm and pump chamber for pumping liquid from the container to a discharge nozzle. A battery powered pump drive unit is mounted on the container and comprises an electric motor having an output shaft coupled with the pump diaphragm through a cam and cam follower arrangement to displace the diaphragm through a pump stroke when the motor is energized. The cam is rotatably driven by the motor, and the cam follower is attached to the diaphragm, whereby rotation of said cam axially displaces the diaphragm, and the cam and cam follower have interengaging dual cam faces for balancing lateral forces therebetween during rotation of said cam relative to said cam follower.