초록 ▼

An apparatus for producing and dispensing an aerated frozen confection in which a pump is mounted in the liquid ingredients reservoir of the apparatus and operates to pump a mixture of air and liquid ingredients, in selected proportions, to the freezer compartment of the apparatus. The pump itself i

An apparatus for producing and dispensing an aerated frozen confection in which a pump is mounted in the liquid ingredients reservoir of the apparatus and operates to pump a mixture of air and liquid ingredients, in selected proportions, to the freezer compartment of the apparatus. The pump itself is responsive to pressure within the freezer compartment to regulate the volume of mixture supplied to the freezer compartment by the pump for enabling automatic replenishment of the aerated mix in the freezer compartment. The pump includes a plunger projecting into the freezer compartment and driven by a cam which rotates with an agitator in the freezer compartment to move the plunger against the bias of a spring in the pump so as to reciprocate the plunger until the pressure within the compartment is great enough to move the plunger away from the cam, against the bias of the spring, thereby discontinuing the supply of mix to the freezer compartment.

대표청구항 ▼

In an apparatus for producing and dispensing an aerated frozen confection, the apparatus having a reservoir for holding a supply of liquid ingredients to be frozen, a pump assembly for pumping the liquid ingredients from the reservoir and air to be mixed with the liquid ingredients, a freezer compar

In an apparatus for producing and dispensing an aerated frozen confection, the apparatus having a reservoir for holding a supply of liquid ingredients to be frozen, a pump assembly for pumping the liquid ingredients from the reservoir and air to be mixed with the liquid ingredients, a freezer compartment for receiving the mixture of liquid ingredients and air from the pump assembly and freezing the mixture, a dispenser communicating with the freezer compartment for selectively dispensing the aerated frozen confection by means of pressure within the freezer compartment, and an agitator within the freezer compartment for agitating the mixture within the freezer compartment, the improvement in which the pump assembly comprises: a pump housing; a conduit within the pump housing, the conduit having an inlet end communicating with the reservoir, an outlet end communicating with the freezer compartment, and a pump cavity within the conduit intermediate the inlet end and the outlet end; a pumping member mounted for longitudinal reciprocation within the pump cavity through a suction stroke and a feed stroke, the pumping member having an internal passage extending generally longitudinally, essentially parallel to the direction of reciprocation of the pumping member and along a path of flow of mixture from the pump cavity to the outlet end of the conduit; a first check valve placed in the path of flow, and a second check valve placed within the conduit, between the inlet end of the conduit and the first check valve, such that mixture will be drawn through the second check valve into the pumping cavity during the suction stroke of the pumping member and then will pass through the first check valve to be discharged at the outlet end during the feed stroke of the pumping member; air metering means in the pump housing and communicating with the conduit between the inlet end of the conduit and the second check valve for passing a metered amount of air into the conduit in response to movement of the pumping member during the suction stroke; and pressure regulating means in the pump housing for limiting the pressure within the freezing compartment to a predetermined maximum pressure.