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Multi-axis load cell with arcuate flexures

  • US 4,099,409 A
  • Filed: 07/05/1977
  • Issued: 07/11/1978
  • Est. Priority Date: 07/05/1977
  • Status: Expired due to Term
First Claim
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1. A multi-axis load cell comprising:

  • a housing;

    a hub disposed in said housing;

    means for connecting said housing and said hub and for receiving and transmitting a load applied to said hub or said housing, said means including a plurality of one-piece flexures, each of the flexures having two ends, each end fixed to one of said housing and said hub, and each flexure has a medial portion coupled to the other of said housing and hub whereby a load applied to the hub or housing causes a displacement thereof by the movement of the connecting means, said displacement being related to the magnitude of the load applied; and

    means for measuring the relative displacement between said housing and said hub and generating signals corresponding thereto, said measuring means mounted to one of said housing and said hub and engaging the other of said housing and said hub, whereby the load exerted through said flexures may be determined, said measuring means including a first set of transducers arranged in pin-wheel fashion about an axis of the load cell and a second set of transducers extending parallel to and about said load cell axis, all of said transducers in the first and second sets engaging the other of said hub and housing at points thereon in a substantially common plane.

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