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Slewing machine

  • US 5,651,576 A
  • Filed: 09/25/1996
  • Issued: 07/29/1997
  • Est. Priority Date: 03/10/1992
  • Status: Expired due to Fees
First Claim
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1. A slewing machine, comprising:

  • a first pivot on a support surface;

    a first plate having a first end and a second end, said first plate being rotatable adjacent said first end about said first pivot an axis of said first pivot being substantially orthogonal to a face of said plate;

    a second pivot adjacent said second end of said first plate;

    a second plate having a first end and a second end, said first end of said second plate being pivotally connected to the second end of said first plate at the second pivot;

    a third pivot adjacent said second end of said second plate;

    an upper plate rotatably connected to said second plate about said third pivot;

    a first link pivotally connected between the support surface and said first end of said second plate; and

    ,a second link pivotally connected between said second end of said first plate and said upper plate, whereby, upon movement of said slewing machine, said third pivot is constrained to effect an arcuate movement, while said upper plate rotates about said third pivot.

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