Concrete mixer truck
First Claim
1. A concrete mixer truck having:
- a mixer drum;
a traction motor;
transmission means for rotating said drum operably connected to the traction motor; and
control means for automatically disconnecting the drum rotating transmission means from the traction motor during predetermined travel conditions which are defined as an increased power demand for travel of the vehicle.
1 Assignment
0 Petitions
Accused Products
Abstract
The invention relates to a concrete mixer truck having a mixer drum adapted to be rotated by the traction motor of the vehicle through an auxiliary transmission of the traction motor transmission. It is an object of the invention to ensure that the power supplied by the traction motor is effectively available for traction purposes under conditions of increased power demand, such as starting and accelerating, and/or that the torque of the mixer drum does not interfere with gear shift operations. To this effect the invention provides a control means adapted to disconnect the mixer drum rotating transmission from the traction motor transmission during predetermined travel conditions, i.e. under conditions defined by an increased power demand for locomotion of the vehicle. Also included in these conditions is each gear shift operation, as at this instance the torque of the mixer drum is prevented from influencing the rotary speed of the speed shift transmission.
-
Citations
24 Claims
-
1. A concrete mixer truck having:
- a mixer drum;
a traction motor;
transmission means for rotating said drum operably connected to the traction motor; and
control means for automatically disconnecting the drum rotating transmission means from the traction motor during predetermined travel conditions which are defined as an increased power demand for travel of the vehicle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 21, 22, 23, 24)
- a mixer drum;
- 11. A concrete mixer truck having a mixer drum rotatable by a traction motor of the vehicle through a drum rotating transmission connected to an auxiliary transmission connected to the traction motor transmission, including control means for automatically disconnecting the drum rotating transmission from the traction motor transmission during predetermined travel conditions which are defined as an increased power demand for travel of the vehicle, said control means having associated therewith a timing relay for limiting the disconnection period of said drum rotation transmission.
Specification