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HOIST SYSTEM

  • US 3,801,070 A
  • Filed: 08/26/1971
  • Issued: 04/02/1974
  • Est. Priority Date: 12/05/1969
  • Status: Expired due to Term
First Claim
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1. A hoist system comprising elevated means having spaced arranged contact points disposed at the verticies of a rectangle;

  • carrier means disposed below said elevated means, and having similarly spaced arranged contact points disposed at the verticies of a rectangle;

    a single cable operatively interconnecting said contact points for carrying said carrier means below said elevated means;

    means for varying the effective length of said cable disposed at a selected contact point, one end of said cable being fixedly secured to a selected contact point and the opposite end thereof being operatively connected to said cable-length-varying means whereby upon operation of said cable-length-varying means the effective length of said cable will be varied correspondingly to vary the vertical disposition of said carrier means relative to said elevated means;

    depending means operatively connected to said elevated means centrally relative to said contact points disposed on said elevated means; and

    means for varying the effective length of said depending means, said depending means being connected at the lower end thereof to said cariier means.

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