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Overhead rail transportation systems
| Details |
Inventors: Roberts, Richard A.;
Assignee: Seed; H. Arnold (Port Moody, CA)
Primary Examiner: Reese; Randolph A.
Assistant Examiner:
Attorney, Agent or Firm: Larson, Taylor & Hinds
A rail having an upper supporting edge and a lower braking edge, and a traction unit for riding on the rail and adapted to be connected to a carrier so as to suspend the carrier from the rail. This traction unit has a power-driven wheel to ride on the rail upper edge, and a plurality of braking wheels positioned close enough to the lower edge of the rail to prevent the traction wheel from jumping off the upper edge thereof, and a brake system for each brake wheel. A substantially C-shaped arm is pivotally connected to the traction unit near the top thereof and extends downwardly and around the rail and has a lower end extending across the plane of the rail, to which the carrier is connected. |
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DETAILED DESCRIPTION I claim: 1.
A rail transportation system comprising a rail to be supported in an overhead position and having an upper supporting edge and a lower braking edge spaced from said upper edge, and a traction unit for riding on the rail and adapted to be connected to a carrier to support said carrier from the rail; said traction unit comprising a supporting frame, said frame, when the traction unit is in operation, being located beside the rail, at least one traction wheel journalled on the frame and positioned to ride on the rail upper edge, a suspension arm having an upper end connected to the supporting frame above the rail and a lower end to be connected to the carrier, said arm being shaped so that all of the weights carried by the traction wheel resolve into a vertical force down through said wheel, the rail and said braking means; pivot means connecting the upper end of said arm to the frame to permit lateral swinging movement of the arm relative to the rail, power means on the frame and connected to the traction wheel to drive said wheel along the upper edge of the rail, braking means on the frame and normally positioned close enough to the lower edge of the rail to prevent the traction wheel from jumping off the upper edge thereof, and a brake operator connected to the brake means and operable to cause said brake means firmly to engage the rail lower edge and to brake the traction unit.
2.
A transportation system as claimed in claim 1 in which said brake means is normally spaced from the rail lower edge, and includes means to cause the brake means to engage said lower edge while braking the traction unit.
3.
A transportation system as claimed in claim 1 comprising a shaft upon which said traction wheel is mounted, said shaft being carried by said supporting frame and said power means being connected to an end of the shaft, and said arm being shaped to extend across the plane of the rail above the rail, down past the rail and back across the rail plane below the rail
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