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US 5,782,634 AGranted
Medical, in particular dental turbine handpiece
AssigneeKaltenbach & Voigt GmbH & Co.
InventorsBernhard Lingenhole, Eugen Mohr
Life of this patent
Estimating the term…
Abstract
In a medical, in particular dental turbine handpiece, having a supply line (8) and a discharge line (9) for the turbine compressed air, whereby a valve (12) is arranged in one line, which valve is controllable by a pneumatic parameter in the other line, the valve (12) is arranged in the discharge line (9) and is so controllable that it closes when a limit value of the parameter in the supply line (8) falls below a minimum value.
Claims10
A turbine handpiece for medical and dental applications;
- comprising a turbine chamber (6) in said handpiece;
- a turbine wheel (7) being rotatably mounted in said turbine chamber;
- a supply line (8) for pressurized air communicating with said turbine chamber;
- a discharge line (9) for outgoing air communicating with said turbine chamber;
- a valve (12) being arranged to automatically prevent a flow of outgoing air in said discharge line;
- and a connecting line (25) for connecting said valve (12) with the supply line (8), said valve being maintained in an open position responsive to pressure reigning in said supply line (8) and closing upon said pressure falling below a predetermined minimum value.
3 more elements
Dependencies are inferred from the claim text.