Invention Grant
US08146671B2 Shoulder-type elevator and method of use 有权
肩型电梯及使用方法

  • Patent Title: Shoulder-type elevator and method of use
  • Patent Title (中): 肩型电梯及使用方法
  • Application No.: US12367347
    Application Date: 2009-02-06
  • Publication No.: US08146671B2
    Publication Date: 2012-04-03
  • Inventor: David Sipos
  • Applicant: David Sipos
  • Main IPC: E21B19/07
  • IPC: E21B19/07
Shoulder-type elevator and method of use
Abstract:
A pipe elevator comprised of a frame pivotally mounted on elongated hangers and having a body with an inward tapered opening that is configured to receive a length of pipe having an outwardly protruding collar around its periphery. A plurality of shoes is mounted within the body. The shoes are poweredly positionable upward and downward within the inward tapered opening of the body and thereby positionable radially inward and outward around the pipe. A means for biasing the shoes upward is provided whereby the weight of the pipe against the shoes will move the shoes around the pipe collar against the periphery of the pipe.
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