Rotary kinetic fluid motors or pumps – With lubricating – sealing – packing or bearing means having... – For shaft sealing – packing – lubricating or bearing means
Patent
1991-12-26
1993-05-18
Denion, Thomas E.
Rotary kinetic fluid motors or pumps
With lubricating, sealing, packing or bearing means having...
For shaft sealing, packing, lubricating or bearing means
415111, 415202, 415904, F01D 1100, F03B 1304
Patent
active
052115313
ABSTRACT:
The invention is directed to a turbine type air motor adapted for use in a hand-piece for dental treatment and includes an air motor body supported by both ends of a turbine shaft with axle-bearings. The air motor includes an air charging passage for introducing compressed air from the rear end, an air discharging passage provided therein in parallel with the air charging passage, and a collet adapted to detachably load a cutting tool. Air flow in the air charging passage is directed to cool one axle-bearing and other air flow in the air discharging passage is directed to cool the other axle-bearing for locally cooling frictional heat generated in both axle-bearings by the high frequency of the air turbine rotation. The collet is devised to easily load the cutting tool by pushing a knock tube provided in the rear end of the hand-piece.
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patent: 3304051 (1967-02-01), Calhoun
patent: 3423068 (1969-01-01), Hall
patent: 3832088 (1974-08-01), Cromie
patent: 4040311 (1977-08-01), Page, Jr. et al.
patent: 4167062 (1979-09-01), Page, Jr. et al.
patent: 5074750 (1991-12-01), Kakimoto
Denion Thomas E.
Ushio Co. Ltd.
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