초록 ▼

A multiple, metered dosage device having an elongated body provided adjacent one end with a compartment or an ampule to contain material to be dispensed, a piston movable against the material to discharge it from a nozzle, a rod-like plunger movable by a pressure device against the piston to dischar

A multiple, metered dosage device having an elongated body provided adjacent one end with a compartment or an ampule to contain material to be dispensed, a piston movable against the material to discharge it from a nozzle, a rod-like plunger movable by a pressure device against the piston to discharge material and a combination stop and release unit movable intermediately of the ends of the body between depressed and elevated positions respectively to engage a pair of racks of teeth on the plunger and including first and second teeth respectively engageable with the racks of teeth sequentially to permit the pressure device to advance the plunger and piston in similar metered, precise or predetermined increments of feeding in discharge direction and then stop the feeding movement and maintain such stopped position until the stop and release unit next is depressed.

대표청구항 ▼

A multiple dosage device including in combination an elongated body including a compartment for material to be dispensed, a piston operable in said compartment to engage the material in opposition to a discharge nozzle on said body, a plunger rod in said body operable to engage said piston, pressure

A multiple dosage device including in combination an elongated body including a compartment for material to be dispensed, a piston operable in said compartment to engage the material in opposition to a discharge nozzle on said body, a plunger rod in said body operable to engage said piston, pressure means in said body operable constantly against said plunger rod to urge it in a direction to effect discharge of said material from said compartment, elongated racks of teeth respectively on opposite edges of said plunger rod, and a manually-operable stop and release unit movable transversely to said plunger rod between projected and retracted positions and operable in sequence relative to said plunger rod, said unit having a unitary member encircling said plunger rod and including first teeth movable into engagement with the teeth on one of said racks to stop movement of said rod by said pressure means when said unit is in projected position and said unit having a second tooth pivotably carried by said member in opposition to said first teeth and movable relative to said member camlike relative to the opposite rack of teeth on said rod when said unit is depressed from a projected position to permit said pressure means to move said rod in feeding direction a limited predetermined distance which is limited by said second tooth fully meshing with said opposite rack of teeth in a manner to stop feeding movement of said rod until said unit next is operated to effect such feeding movement of said piston by said pressure means.