Precompression pump sprayer having suck-back feature

Details Precompression pump sprayer having suck-back feature Precompression pump sprayer having suck-back feature

1996-04-10

1998-07-28

Huson, Gregory L.

Dispensing

With cleaning means

2223212, 2223213, B67D 108

Patent

active

057852081

ABSTRACT:
A precompression pump sprayer has a variable volume suck-back chamber in communication with the discharge orifice for inwardly suctioning any residual liquid away from the orifice and the spin mechanics to avoid clogging as a result of dried accumulated product. In one embodiment a cover on the plunger head is spring loaded and therewith defines the suck-back chamber. In another embodiment the plunger head is spring loaded on the piston stem, such that in both embodiments a top end wall of the suck-back chamber is shiftable relative to the piston stem independently of piston reciprocation. The biasing spring has a spring force permitting a shifting of the end wall to reduce the volume of the suck-back chamber at a peak pressure reached in the pump chamber beyond the threshold pressure required to open the discharge valve, at which time the spring is compressed. The restoring force of the spring causes the top end wall to shift to expand the volume of the suck-back chamber.

REFERENCES:
patent: 3779464 (1973-12-01), Malone
patent: 4051983 (1977-10-01), Anderson
patent: 4147476 (1979-04-01), Warren
patent: 4516727 (1985-05-01), Saito et al.
patent: 4941595 (1990-07-01), Montaner et al.
patent: 5105988 (1992-04-01), Knickerbocker
patent: 5207785 (1993-05-01), Knicknerbocker
patent: 5348189 (1994-09-01), Cater
patent: 5358149 (1994-10-01), O'Neill
patent: 5458289 (1995-10-01), Cater

Affiliated with

Also associated with

Rating

Precompression pump sprayer having suck-back feature does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Precompression pump sprayer having suck-back feature, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Precompression pump sprayer having suck-back feature will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-16205