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Turbine for a dental handpiece

  • US 5,425,638 A
  • Filed: 08/27/1993
  • Issued: 06/20/1995
  • Est. Priority Date: 06/10/1993
  • Status: Expired due to Fees
First Claim
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1. A turbine for a dental handpiece for selectively rotating a tool member, said turbine comprising:

  • a rotor housing having a first end portion and a second end portion, at least said first and second end portions of said rotor housing being fabricated of a ceramic material, said rotor housing defining a rotor chamber and being provided with at least one inlet port for placing said rotor chamber in fluid communication with a source of pressurized fluid whereby pressurized fluid is selectively injected into said rotor chamber, and with an outlet port for exhausting said pressurized fluid from said rotor chamber, said first end portion of said rotor housing being provided with a rotor shaft opening communicating with said rotor chamber; and

    a rotor member rotatably mounted in said rotor chamber of said rotor housing, said rotor member being fabricated of a ceramic material, said rotor member including a shaft portion defining a first end portion received through said rotor shaft opening of said first end portion of said rotor housing for engaging and supporting said tool member, said rotor member also including a rotor disk carrying a plurality of blade members, said rotor disk being rotatably positioned within said rotor chamber so as to be selectively rotated by the flow of said pressurized fluid from said inlet port of said rotor housing.

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