Motor chain saw
US3938633A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 14, 1973 |
| Grant date | Feb 17, 1976 |
| Priority date | — |
| Expiry date | Feb 14, 1993 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16D11/06
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A motor chain saw in which serially arranged clutches are interposed between the motor output shaft and the chain of the saw. The clutches include a centrifugal clutch and a mechanically controlled clutch. The mechanically controlled clutch has at least one drive element having an engaged position and a disengaged position and is acted on by centrifugal force urging it toward the position which it occupies. A spring urges the device element toward engaged position with a force less than the centrifugal force which acts on the drive element above a certain speed. The mechanically controlled clutch includes at least one control operable to move the drive element in at least disengaging direction during rotation of the clutch.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.