Abstract This invention relates to a concrete mixer comprising a body; a rotatably mounted mixer 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 reversibe 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.
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.
Claim 2
Dependent Claim
201 words
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.
Claim 3
Dependent Claim
56 words
A concrete mixer as claimed in claim 1 in which said control member comprises a rotatable shaft; said remote control means includes a pump control lever secured at one end to said rotatable shaft; a crank arm in driven engagement with said electric motor and link means connecting said pump control lever and said crank arm.
Claim 4
Dependent Claim
58 words
A concrete mixer as claimed in claim 1 in which said remote control means includes a plug-in terminal; electric control cable from said electric motor to said plug-in terminal; a manually operable control box; an electric control cable connected to said control box; said control cable having a plug at an end thereof connectable to said plug-in terminal.
Claim 5
Dependent Claim
17 words
A concrete mixer as claimed in claim 1 in which said body is a wheeled truck body.
Claim 6
Dependent Claim
60 words
A concrete mixer as claimed in claim 1 in which said control member comprises a rotatable shaft; said remote control means includes a pump control lever secured at one end to said rotatable shaft; a crank arm having a gear segment in driven engagement with said electric motor and link means connecting said pump control lever and said crank arm.