US 6,729,500 B1 · Twirling dip tube

Abstract

A fluid pump dispenser includes a spring biased pump piston having a generally hollow stem and reciprocable between pressure and return strokes within a pump cylinder therewith defining a variable volume pump chamber for dispensing fluid through a discharge opening at an outer end of the stem. The stem defines a valve controlled discharge passage leading from the pump chamber to the discharge opening. A driver nut may be mounted adjacent the pump piston and include at least one flange engaged with at least one respective spiral turn on a spindle disposed within the pump chamber to thereby rotate the spindle during reciprocation of the pump piston. A dip tube may be disposable within a container and affixed to the spindle for rotation with the spindle. A figurine may be mounted onto the dip tube for complementary rotation with the dip tube and the spindle.

Claims30

Dependent claims

A fluid pump dispenser comprising:

a spring biased pump piston having a generally hollow stem and reciprocable between pressure and return strokes within a pump cylinder therewith defining a variable volume pump chamber for dispensing fluid through a discharge opening at an outer end of said stem, said stem defining a valve controlled discharge passage leading from said pump chamber to said discharge opening;
a driver nut mounted adjacent said pump piston and including at least one flange engaged with at least one respective spiral turn on a spindle disposed within said pump chamber to thereby rotate said spindle during reciprocation of said pump piston;
and
a dip tube disposable within a container and affixed to said spindle for rotation with said spindle.

1 more element

Dependencies are inferred from the claim text.

Twirling dip tube

Life of this patent

Twirling dip tube

Life of this patent

Abstract

Claims30