Medical instrument having an internally-cooled tool

Details Medical instrument having an internally-cooled tool Medical instrument having an internally-cooled tool

1994-02-15

1995-07-18

O'Connor, Cary E.

Dentistry

Apparatus

Having intra-oral dispensing means

433104, A61C 112

Patent

active

054336040

ABSTRACT:
A medical instrument, particularly a dental instrument has a head housing with a chucking arrangement for gripping an internally-cooled tool. In order to assume an optimum transfer of coolant from a delivery channel into an internal channel of the tool, an exit opening of the delivery channel is arranged opposite the admission opening of the tool in a no-contact fashion at the end of the tool being gripped. To prevent leakage, sealing gaps are provided between the moving parts in the head housing and compressed air is charged into these sealing gaps under a higher pressure in comparison to the pressure of the coolant.

REFERENCES:
patent: 3624905 (1970-02-01), Barsby
patent: 3762052 (1973-10-01), Melde
patent: 3871097 (1975-03-01), Melde
patent: 4021920 (1977-05-01), Kirschner et al.
patent: 5096421 (1992-03-01), Seney
patent: 5275558 (1994-01-01), Seney

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