Liquid dispensing pump

Details Liquid dispensing pump Liquid dispensing pump

1999-03-26

2000-08-01

Kaufman, Joseph A.

Dispensing

With discharge assistant

With material supply container and discharge assistant with...

B67D 540

Patent

active

060953772

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.

REFERENCES:
patent: 4747523 (1988-05-01), Dobbs
patent: 5779108 (1998-07-01), Barriac et al.
patent: 5794822 (1998-08-01), Foster
patent: 5884820 (1988-05-01), Thanisch et al.

Affiliated with

Also associated with

Rating

Liquid dispensing pump does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Liquid dispensing pump, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Liquid dispensing pump will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-655347