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Selectively-retractable elevated walkway extension

  • US 4,787,111 A
  • Filed: 01/11/1988
  • Issued: 11/29/1988
  • Est. Priority Date: 01/11/1988
  • Status: Expired due to Term
First Claim
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1. In an elevated walkway assembly, a planar walkway and means for selectively extending said walkway comprising a planar ramp, means mounting said ramp for movement between a retracted position beneath said walkway and an extended position a pair of handrail gates pivotally mounted on said ramp-mounting means at spaced positions adjacent to opposite side edges of said ramp, guide means on said ramp coupled to said handrail gates for pivoting said handrail gates to an open position as said ramp extends from said ramp-mounting means and to a closed position as said ramp is retracted into said ramp-mounting means, and means for selectively extending said ramp from said mounting means and retracting said ramp into said mounting means;

  • characterized in the said handrail gates overlap each other in said closed position, and in that said guide means on said ramp comprises assymetric guide means for pivoting one said handrail gate to said closed position prior to the other of said handrail gates to prevent interference of said handrail gates with each other.

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