Wrench for a dental handpiece

Details Wrench for a dental handpiece Wrench for a dental handpiece

1978-09-14

1980-03-18

Jones, Jr., James L.

Tools

Wrench, screwdriver, or driver therefor

Machine

B25B 2308

Patent

active

041933273

ABSTRACT:
The usual dental handpiece has a shank with an end housing with openings therein at opposite ends of an axis. One opening reveals a non-circular spindle. The other opening, adjacent the other end of the spindle, receives a non-circular burr threadedly engaging the spindle. The wrench has a central frame adapted to extend around the housing with one end overlying one of the openings and with a second end overlying the other of the openings. One wrench end has an open-sided, non-circular slot adapted nonrotatably to engage the non-circular burr by a motion in a direction normal to the axis. The other wrench frame end has a shaft rotatable and slidable in a coaxial journal. The shaft is nonrotatably engageable with the non-circular spindle. A knob on the shaft is used in manually rotating and axially sliding the shaft within the journal. A spring urges the shaft toward one extreme position. The frame has frame stops engageable with the handpiece shank in extreme rotated positions.

REFERENCES:
patent: 3935761 (1976-02-01), Junkel et al.
patent: 3960039 (1976-06-01), Nash et al.
patent: 4015489 (1977-04-01), Lieb et al.
patent: 4033040 (1977-07-01), Bareth et al.

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