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Rotary pump with an improved air extraction system for sacking ground meat

  • US 4,761,121 A
  • Filed: 11/21/1986
  • Issued: 08/02/1988
  • Est. Priority Date: 12/17/1985
  • Status: Expired due to Term
First Claim
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1. Rotary pump for sacking ground meat comprising a stator with a cylindrical cavity with a vertical axis and a rotor housed in a turning manner in said cylindrical cavity of the stator said rotor being formed of a higher central part and a lower peripheral part so as to describe over said peripheral part an upper annular chamber into which the ground meat is fed from a filling mouth and made to advance to a delivery mouth by pump blades housed in a vertically sliding manner in respective radial passages in the peripheral part of the rotor, said blades being driven alternately to protrude from and return into the space occupied by said peripheral part in conformity with a predetermined sequence determined by at least one fixed annular cam located in a lower annular chamber located beneath said peripheral part of the rotor and on which there rest said pump blades and being provided with an exhaust mouth for deaeration of the ground meat, characterized in that said exhaust mouth opens into said lower chamber of the pump in a position essentially diametrically opposed to said filling mouth and communicates with the overlying annular chamber through an ample passage and with a zone of said lower chamber underlying said filling mouth through a narrow passage.

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