US 4,955,724 AGranted

Food processing machine

AssigneeA. Stephan U. Soehne GmbH & Co.

InventorFriedrich Otto

Life of this patent

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Abstract

The invention relates to a machine for the processing of foodstuffs or for the preparation of liquid or pasty pharmaceutical and chemical products, with a bowl, through the bowl bottom of which there leads a motor shaft, protruding perpendicularly into the bowl, of a motor arranged underneath the bowl, and with a shaft seal sealing off the motor shaft vacuum-tightly from the bowl bottom. A cap-shaped seal support is pushed onto the free end of the motor shaft and resets underneath the fitted bowl on a shoulder of the motor shaft and engages at a clear distance labyrinth-like with a lower peripheral cap rim over a stationary housing ring enclosing the motor shaft. The seal support is pushed over and contacts an O-ring which lies in an annular groove of the motor shaft. In the upper section of the seal support, a V-ring is loosely inserted as a sealing ring, and encloses the shaft passage in the bowl bottom with an upper V-member. With fitted bowl, the V-ring is seated under radial prestress vacuum-tightly on the motor shaft and bears with its upper V-member under axial stress against the underside of the bowl bottom.

Claims4

Dependent claims

A machine for the processing of foodstuffs or for the preparation of liquid or pasty pharmaceutical and chemical products comprising:

a bowl with a bottom having a shaft passage passing therethrough;
a motor having a motor shaft with a free end, a shoulder and an annular groove adjacent to said shoulder and located between said free end and said shoulder, wherein said motor shaft protrudes through said shaft passage perpendicularly to said bottom of said bowl;
a housing ring enclosing said motor shaft;
an O-ring disposed around said motor shaft within said annular groove;
a cap-shaped seal support with an upper section having a recess therein and a lower peripheral cap rim engaging in labyrinth fashion at a clear distance said housing ring;
and
a V-ring seated in said recess in tight contact with said motor shaft and having an upper V-member and a lower V-member,
wherein said seal support is fitted around said motor shaft under said bowl such that said seal support surrounds said annular groove, rests on said shoulder and contacts said O-ring, and
wherein said upper V-member of said V-ring encloses said shaft passage in said bottom of said bowl and fits against the underside of said bottom of said bowl under axial stress.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 07/387,494Filed 31 Jul 1989
Priority: DE 8809812[U]2 Aug 1988
Granted: 11 Sep 1990
Term ends: Not estimatedThe source records don’t support an estimate.

Classification12 codes

B01F 27/808
With stirrers rotating about a substantially vertical axis: with stirrers driven from the bottom of the receptacle
A47J 43/085
Driving mechanisms: for machines with tools driven from the lower side
B01F 27/41
Mixers with rotor-rotor system, e.g. with intermeshing teeth: with the mutually rotating surfaces facing each other
B01F 35/4112
By supporting only one extremity of the shaft: at the bottom of the receptacle, e.g. by studs