Freezer

Refrigeration – Means producing shaped or modified congealed product – With article press means

Patent

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Details

100 93P, F25C 514

Patent

active

050351206

ABSTRACT:
A freezer comprises an insulated housing with two opposite walls defining an interior chamber therebetween, the walls respectively defining a charging opening and a discharge opening for respectively charging products to be frozen into the interior chamber and discharging the frozen products from the interior chamber, and a stack of horizontal freezer plates arranged in the interior chamber. Vertical screw jacks vertically displace the stack of freezer plates whereby they are successively moved to the level of the openings. To assure good lubrication at low temperatures, each screw jack comprises a screw element, a nut engaging the screw element, a tube element concentrically surrounding the screw element, the nut being affixed to one tube element end and the opposite tube element end being closed, and one of the screw jack elements being pendularly suspended from the freezer housing frame while the stack of freezer plates is suspended on the other screw jack element, and a tubular casing having a bottom, the tubular casing concentrically surrounding the tube element and the tube element passing fluid-tightly through the tubular casing bottom, the interiors of the tube element and of the tubular casing being in communication with each other to define an oil-filled closed space of a predetermined volume. A closed expansion reservoir of air is connected to an upper part of the closed space, and a motor is coupled to the one screw jack element for rotating the one screw jack element.

REFERENCES:
patent: 3557975 (1971-01-01), Amerio
patent: 4030962 (1977-06-01), Fitzwater
patent: 4083199 (1978-04-01), Gram
patent: 4342205 (1982-08-01), Gram

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