Dual-mode bus

Claim 1

In a dual-mode bus adapted to travel on a guideway having on both sides thereof two upstanding guide walls, at least one of said two upstanding guide walls being installed with an electric cable, comprising a rear axle having at both ends thereof wheels and an axle housing, a frame supported on the axle and a current collector engageable with the electric cable, the frame having two side frames: a floating support comprising two beams, said two beams being connected hingedly at their one ends to the axle housing at two transversely spaced locations thereon, respectively, and being connected at their opposite ends by shackles with the side frames, respectively, each of said two beams having two spaced portions, first one of each of said two beams being disposed nearer to the axle than second one of said two spaced portions thereof; a first arm having a first portion and a second portion spaced from the first portion thereof; a second arm having a first portion and a second portion spaced from the first portion thereof; means mounting said first portions of said first arm and second arm to said first portions of said two beams and said second portions of said first arm and second arm to said second portions of said two beams, respectively; a first guide wheel rotatably carried by said first arm and contacting with one of the two upstanding guide walls; a second guide wheel rotatably carried by said second arm and contacting opposite one of the two upstanding guide walls; at least one of said first and second arms carrying the current collector at a third portion, said third portion being spaced, farther than said first portion of said at least one arm, from said second portion of said at least one arm; and resilient means for urging said first and second arms toward said one and said opposite one of the two upstanding guide walls, respectively.