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:
Aug. 01, 2000
Filed:
Mar. 26, 1999
Steve L Sweeton, Lee's Summit, MO (US);
Joseph K Dodd, Lee's Summit, MO (US);
Calmar Inc., City of Industry, CA (US);
Abstract
A manually actuated dispensing pump has a pump housing for mounting with a closure cap at an upper end of a container for fluent product, the housing having a pump cylinder open at its outer end to atmosphere and providing at its inner end area a pump chamber for a manually reciprocable piston having a resilient piston seal, the cylinder having in its lower area at least one vent port positioned outwardly of the chamber, the piston having a vent seal for closing communication between the open end of the cylinder and the vent port, the piston forming a sub-assembly with the housing upon insertion into the cylinder through the open outer end thereof, and one or more ramps or tapered ribs being provided adjacent the vent port for spacing the piston seal from an inner edge of the vent port permitting the piston seal to by-pass the vent port to avoid any damage of the piston seal upon assembly into the cylinder.