Miniature motor having an internal coolant line

US4184256A · kind A · utility

Assignee

• KALTENBACH & VOIGT GMBH · DE

Inventors

• Hans Loge · Biberach an der Riß, DE
• Gerd Lohn · Zell am Harmersbach, DE

Key dates

• Filing date: Dec 12, 1977
• Grant date: Jan 22, 1980
• Expiry date: Dec 12, 1997

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61C1/06
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A miniature motor for driving a hand-held instrument such as a dental handpiece, the motor having at one end a connecting member for supplying coolant to a motor coolant line and motive energy to the motor, and at the other end a coupling member to which a hand-held instrument can be releasably connected. An intermediate coolant line in the coupling member serves to transfer coolant from the motor coolant line to a coolant supply line in the instrument which directs the coolant to a working implement at one end of the instrument. The coolant line in the motor comprises a tubular member which is removably mounted in the motor and has a releasable connection at its inlet end to a coolant supply connector in the connecting member, and a releasable connection at its outlet end to the intermediate coolant line in the coupling member. At least one of these releasable connections is provided in a closure member which is removable in order to render the tubular member accessible for servicing.