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Slit-type sealing arrangement for encapsulated measuring system

  • US 4,600,203 A
  • Filed: 03/19/1985
  • Issued: 07/15/1986
  • Est. Priority Date: 03/24/1984
  • Status: Expired due to Fees
First Claim
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1. In an encapsulated measuring system for measuring the position of first and second objects movable relative to each other, of the type comprising a housing, adapted to be connected to the first object, which defines a slit extending along a measuring direction, a scanning unit disposed in the housing, and a follower, adapted to be connected to the second object and coupled to the scanning unit to move along the measuring direction and to extend through the slit, said follower having a convex shape in the measuring direction, the improvement comprising:

  • a pair of multipart sealing elements, each multipart sealing element mounted to the housing on a respective side of the slit to extend along the measuring direction, each multipart sealing element comprising a sealing profile shaped to seal against the follower and an elastic supporting element having a length dimension extending along the measuring direction and shaped to bias the respective sealing profile into sealing engagement with the follower;

    the sealing profiles positioned to abut and seal against one another across the slit; and

    said follower operating to indent the elastic supporting elements such that the elastic supporting elements are indented maximally in a region aligned with the follower, which region moves along the length of the supporting elements as the follower moves along the measuring direction.

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