Dentistry – Apparatus – Having motor or means to transmit motion from motor to tool
Patent
1977-07-07
1980-04-22
Mancene, Louis G.
Dentistry
Apparatus
Having motor or means to transmit motion from motor to tool
A61C 112
Patent
active
041987551
ABSTRACT:
A dental handpiece having a drive section and a detachably connected grip section with a working instrument with at least one cooling medium line for conveying a cooling medium to the area of the instrument characterized by the grip section including at least a first and second part engaged with each other for relative rotation therebetween with each part having a segment of a fluid passage for each of the cooling mediums line with the second part being non-rotatably connected with the drive section and a rotatable fluid connection disposed between the first and second parts so that the grip section is free to rotate relative to the drive section of the handpiece and the second part. In one embodiment of the invention, the fluid connection is formed by an annular groove in one of the first and second parts with a port in the other of said parts axially aligned and sealed therewith by sealing rings. In another embodiment of the invention, the fluid connection is formed by flexible tube loosely received in an annular space in the grip section which tube interconnects the segments of the two parts.
REFERENCES:
patent: 3252719 (1966-05-01), Borden
patent: 3858323 (1975-01-01), Flatland
patent: 3936940 (1976-02-01), Loge
patent: 4007529 (1977-02-01), Fleer
patent: 4075761 (1978-02-01), Behne et al.
Landgraf Hermann
Worschieschek Rainer
Mancene Louis G.
Siemens Aktiengesellschaft
Wilson John J.
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