Control release for a tool grip for a dental handpiece
US4400158A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 23, 1981 |
| Grant date | Aug 23, 1983 |
| Priority date | — |
| Expiry date | Jul 23, 2001 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61C1/14
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A dental handpiece has a hollow main body enclosing a central rotating spindle equipped with tool grip means adjacent its forward end; spring means effects axial movement of the spindle in an inward direction for actuating the tool grip means to provide a gripping function and release means moves the spindle outwardly against the bias of the spring means for deactivating the tool grip means with the release means including a unitary plate removably mounted in the main body with first and second levers being pivotally mounted on opposite sides of the plate so as to be substantially positioned within the confines of the main body; driving ends of the levers are engageable with the spindle for moving the spindle axially outwardly of the main body to deactivate the grip means. The levers are on diametrically opposite sides of the axis of the handpiece and are mounted for pivotal movement in a plane passing through the axis of the hand instrument.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.