초록 ▼

A riding machine (10) includes a battery pack positioned as low as possible in the chassis (12) between the front and rear wheels (14, 15) and removable in a horizontal movement direction while supported by the bottom by a pallet jack. A steering system includes steering shafts (58, 76) which are ro

A riding machine (10) includes a battery pack positioned as low as possible in the chassis (12) between the front and rear wheels (14, 15) and removable in a horizontal movement direction while supported by the bottom by a pallet jack. A steering system includes steering shafts (58, 76) which are rotatable together while allowing relative pivotable movement therebetween and which are rotatably connected to the spindle (38) of the steerable rear wheels (15) through a jack shaft (44). In one preferred form, the burnishing head of the machine (10) is raised and lowered relative to the floor surface by an electric actuator (104) which pivots a linkage (92) through a connection allowing floating travel. The pressure which the treating member (16) engages the floor surface is controlled in response to the current level of the electric motor (86) which rotates the treating member (16). The current level of the electric motor (86) is measured by monitoring the voltage at the ends of a negative supply lead cable (144) and the temperature of the cable (144). In an alternate form, the floor scrubbing member (170) of the machine (10) is raised and lowered relative to the floor surface and applied by a down pressure which can be added or removed by the electric actuator (104) through the same type of connection allowing floating travel.

대표청구항 ▼

1. Apparatus for treating a surface comprising, in combination: a chassis adapted to be moved along the surface; means for treating the surface; and means for mounting the treating means to the chassis for movement relative to the surface comprising, in combination: a linkage pivotably mounted to th

1. Apparatus for treating a surface comprising, in combination: a chassis adapted to be moved along the surface; means for treating the surface; and means for mounting the treating means to the chassis for movement relative to the surface comprising, in combination: a linkage pivotably mounted to the chassis about a first axis and pivotably mounted to the treating means about a second axis spaced from and parallel to the first axis; an actuator pivotably mounted to the chassis about a third axis spaced from and parallel to the first axis, with the actuator including a rotatable threaded shaft and a threaded element threadably received on the threaded shaft; a housing pivotably mounted relative to the treating means about a fourth axis spaced from and parallel to the first and third axes, with the housing being restrained on the threaded element while allowing relative axial movement for a distance parallel to the threaded shaft; and means for biasing the housing away from the threaded element.