Twist bottle dispenser

Claim 1

A syringe or like dispensing apparatus characterized as having an axially movable nozzle with a contoured exterior end with discharge means, this nozzle having a tubular stem portion with an interior axial bore, this tubular portion having a finished inner end and providing therewith a sealing end portion, and a cap member associated with said nozzle and having a retaining aperture sized to be slidable along the tubular stem portion of the nozzle, said cap member having a tubular collar member portion extending from the retaining aperture and for a determined distance and on the end of this tubular collar portion finished so as to provide a stop end substantially normal to the axis of the collar member, and with said cap member having means for securing the cap member and nozzle to a fluid container for the discharge of a fluid in said container, the syringe having a valve construction selectively actuatable for the discharge of the fluid contents of the container, the valve construction including: (a) a valve plug having a stem portion slidable within said axial bore of the tubular stem portion of the nozzle, the stem portion of the valve plug having longitudinal fluid passageways formed along and in the exterior surface of said stem portion, these passageways providing means for conducting fluid from the container to the interior of the nozzle when these passageways are exposed to the fluid within the container; (b) a first seal means on said valve plug and disposed circumferentially around said valve plug and below said longitudinal passageways, this seal means adapted to engage the interior bore of the tubular portion of the nozzle and slide therealong and therein; (c) a second seal means formed on said valve plug and at a determined distance from said first seal means and substantially at the end opposite the stem portion, this seal means extending outwardly and having surface means disposed to engage the finished stop end on the nozzle to effect a fluid seal; (d) an annular flange portion formed on said valve plug and outwardly of said second seal means and sized and disposed to engage the stop end of the collar member of the cap, and (e) cooperating means formed on the stop end of the collar and the annular flange of the valve plug, said cooperating means providing a fluid pathway from the container to the exterior of the valve plug, and the first and second seal means is effective when the valve plug is fully inserted and there is no fluid flow through the cooperative means to the interior of the nozzle, outward partial movement of the nozzle makes the second seal means ineffective while the first seal prevents fluid flow into the fluid passageways and further outward movement of the nozzle renders the first seal means ineffective and no longer inhibits fluid flow as and when the first seal means is moved from in way of the interior bore of the tubular portion of the nozzle and fluid flows into the longitudinal fluid passageways formed in the stem of the valve plug and into the interior of the nozzle for discharge therefrom.