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:
Apr. 24, 2007
Filed:
Dec. 08, 2005
Ben Z. Cohen, New York, NY (US);
Nigel Kelly, Rye, NY (US);
Ben Z. Cohen, New York, NY (US);
Nigel Kelly, Rye, NY (US);
Other;
Abstract
A pre-compression pump () dispenses microdoses of fluid (F). The pump minimizes pulsing due to pressure fluctuations. The pump is provided with the following to limit pulsing: a low force slow return velocity return spring (); enlarged fluid passage (); elastic bumper (); and, a rachet tooth () bearing against the stem (). Further, a deflectable diaphragm (), a splined () stem (), no dip tube, and an off-center, gravitational low-point pump inlet () assist in printing the pump. The pump includes a stem () with deflectable fingers () to ensure sufficient momentum in pump operation. Detents () and grooves () selectively lock a nozzle cap () in an inoperative position. To ensure cleanliness, nozzle () cleaning is provided, wiping of the nozzle to remove meniscus (M) therefrom, cuts () formed in a shroud () assist in drawing excess fluid from the nozzle, and an empty volume () for collecting fluid run-off from the nozzle. A handle (H) is mounted to the pump providing a grip.