B - Operations – Transporting – 28 – D
Patent
B - Operations, Transporting
28
D
143/11, 164/23,
B28D 1/08 (2006.01) B23D 57/00 (2006.01)
Patent
CA 1292407
ABSTRACT OF THE DISCLOSURE A wire drive apparatus for a wire saw is provided for cutting structures of reinforced concrete with a wire and which is easily movable on the base surface such as the surface of the road or floor without using cranes. The wire drive apparatus includes a carriage, a wire drive pulley for endless circulation of the cutting wire and a pulley drive means for turning the wire drive pulley that are installed on the carriage. Rails are laid on the surface of the road or floor. Front and rear wheels allow the carriage to travel on the rails. Wheel drive means turns the front and rear wheels. Supplementary front and rear wheels hold the carriage so as to be movable on the base surface having points of contact with the base surface at a lower level than those of the front and rear wheels. At least one pair of the supplementary wheels are provided with a steering means. When the front and rear wheels are engaged with the rails, the supplementary front and rear wheels float above the base surface. When the supplementary front and rear wheels touch the base surface, the front and rear wheels float above the base surface.
573479
Johnston Edward P.
Ridout & Maybee Llp
LandOfFree
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