Pressure-responsive speed control for dental handpieces

Details Pressure-responsive speed control for dental handpieces Pressure-responsive speed control for dental handpieces

A - Human Necessities

61

C

83/7

A61C 1/05 (2006.01) G05D 13/34 (2006.01)

Patent

CA 1055741

PRESSURE-RESPONSIVE SPEED CONTROL FOR DENTAL HANDPIECES Abstract A speed control system for dental handpieces in which a sleeve or tube of pliable material defines an elongated deformable passage. The passage communicates at one end with a source of gas (air) under pressure and, at its opposite end, is vented to discharge a continuous stream of gas whenever the unit is in operation. When the resilient sleeve is squeezed anywhere along its length, back pressure is created which acts upon a pressure-responsive pilot valve, the pilot valve in turn regulating the speed of the dental handpiece in accordance with the amount of back pressure developed.

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