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Rotatable supporting structure

  • US 4,184,840 A
  • Filed: 04/28/1978
  • Issued: 01/22/1980
  • Est. Priority Date: 04/28/1978
  • Status: Expired due to Term
First Claim
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1. A ceramic rotatable supporting structure for use with intense heat comprising a ceramic base having a substantially planar upper surface, a ceramic pin located on the upper surface of said base extending upwardly therefrom and stationary with respect thereto, a slightly raised bearing surface completely surrounding said pin, a ceramic upper member having an opening at substantially the geographic center thereof, said opening being of a diameter slightly larger than the cross-sectional size of said pin, ceramic means for supporting a workpiece located on the upper surface of said upper member whereby the upper member may be totatably disposed on said base with said pin extending into said opening such that said upper member rotates about said pin.

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