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CONTROL FOR VEHICULAR CONCRETE MIXER

  • US 3,773,304 A
  • Filed: 07/20/1972
  • Issued: 11/20/1973
  • Est. Priority Date: 04/17/1972
  • Status: Expired due to Term
First Claim
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1. A concrete mixer comprising a body;

  • a rotatably mounted mixing drum on said body;

    a hydraulic motor for rotating said mixing drum;

    a reversible pump for supplying hydraulic fluid to said hydraulic motor;

    a control member for said reversible pump operable in oppoSite directions from a neutral position in which said pump is inoperable to institute delivery of fluid from said pump in opposite directions at a rate dependent upon the amount of movement from said neutral position;

    an electric motor operable to give rotational output in both directions;

    remote control means for said electric motor manually operable to operate said electric motor in either direction of rotation at a desired cumulative amount;

    a transmission for connecting the rotational output of said motor to said control member for said reversible pump whereby said control member can be operated in both directions through said neutral position to control the rotation of said mixing drum;

    limit means for limiting the travel of said control member in each direction; and

    signal means adjacent said remote control means responsive to the location of said control member in its said neutral position to indicate to an operator when said control member is in said neutral position.

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