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US 3,936,940 AGranted
Dental handtool
AssigneeKaltenbach & Voight GmbH & Co.
InventorHans Loge
Life of this patent
Estimating the term…
Abstract
A dental handtool in which an extended sleeve has at its center, a driving shaft for rotary movement of the tool used for dental treatment. The driving shaft is at one end of the sleeve, and a freely rotating driving part is attached to the handtool at the opposite end of the sleeve. A coolant pipe between the driving part and the handtool, feeds coolant to the treatment area of the dental tool.
Claims8
A dental handtool comprising, in combination, an extended hand sleeve;
- a driving shaft located at the center of said sleeve for rotary movement of a tool for dental treatment, said tool being at one end of said sleeve, a freely rotating driving part disconnectably attached to the handtool at the opposite end of said sleeve;
- a coolant pipe for feeding coolant to the region of said dental tool, said coolant pipe having a first coolant section inside said driving part and having a second section inside said sleeve;
- a ring channel;
- said coolant sections being disconnectably coupled by said ring channel when in the connected state;
- sealing elements on two sides of said ring channel, the coolant section inside said driving part entering said ring channel radially from said driving part.
2 more elements
Dependencies are inferred from the claim text.