US 5,092,702 A · Fluid discharge device

Abstract

A fluid discharge device includes a valve seat, a valve body biased rearwardly with respect to the valve seat and a pusher disposed at the back of the valve body so that it can be moved forwardly to open a valve against the biasing force when a forward push force is applied. The pusher is disposed inside a shaft body so that the push force is applied indirectly to the pusher through a fluid tank removably attached to the pusher. Outward protuberances are disposed on the outer wall of the pusher, recesses are formed on the inner wall of the shaft body, and the protuberances of the pusher are positioned in the recesses to limit the rotation of the pusher. The invention relates also to a fluid discharge member wherein, when a fluid is a liquid, the pusher is biased rearward in such a manner as to define a space between it and the valve body when no push force is applied, and an engagement portion with the pusher is disposed on the shaft body so as to limit the rearward displacement of the pusher.

Claims18

Dependent claims

A fluid discharge device comprising:

a discharge tip;
a fluid tank located rearwardly of said discharge tip;
a fluid passage between said fluid tank and said discharge tip;
a valve means for opening and closing said fluid passage, said valve means comprising a valve seat, and a valve body movable between a closed position in which it is engaged with said valve seat and an open position in which it is spaced forwardly from said valve seat;
first biasing means for resiliently biasing said valve body rearwardly into its closed position;
a push member mounted rearwardly of and adjacent to said valve body, and having an axial hole formed therethrough which defines a first part of said fluid passage, said push member being movable between a forward position in which it abuts said valve body and a rearward position in which it is spaced rearwardly from said valve body, and said push member defining a means for pushing said valve body forwardly against a biasing force of said first biasing means and into said open position;
and
second biasing means for resiliently biasing said push member rearwardly into said rearward position in which said push member is spaced rearwardly from said valve body.

5 more elements

Dependencies are inferred from the claim text.

Fluid discharge device

Life of this patent

Fluid discharge device

Life of this patent

Abstract

Claims18