Internal-combustion engines – Starting device – For airplane
Patent
1981-03-30
1983-02-08
Myhre, Charles J.
Internal-combustion engines
Starting device
For airplane
F02N 1112
Patent
active
043722636
ABSTRACT:
A hand held electric motor driven drill is coupled by novel means to an internal combustion engine to start the engine. The end of the engine shaft is threaded to receive an elongated nut having a pair of V-shaped slots in its upper end, each slot having one side parallel to the axis of the shaft and the other side at an angle of 60.degree. to the first side. The chuck of the drill is fitted with a flat faced tool made from a conventional wood bit whose tip and cutting edges have been rounded off to provide a safe and secure coupling with the slots and hole in the end of the nut threaded onto the engine shaft. With the tool pressed into the slots in the nut, the drill motor is energized to rotate the tool. The flat faces of the tool bearing against the two sides of the slots parallel to the axis of the shaft force the shaft to turn at the speed of the drill until the engine is started. The engine then picks up speed and as its speed exceeds that of the drill, the tool will be forced out of engagement with the nut by sliding along the 60.degree. sloped sides of the slots in the nut.
REFERENCES:
patent: 2932292 (1960-04-01), Trotter et al.
patent: 3537436 (1970-11-01), Heisler
Dolinar Andrew M.
Johnson Merrill N.
Myhre Charles J.
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