FIN-TYPE PROPULSIVE DEVICE Russian patent published in 2006 - IPC B63H1/36 B63H1/30 B63G8/08 

FIELD: drives for submersible man-powered vehicles in sports, recreation and research work.

SUBSTANCE: drive of fin-type propulsive device is mounted in housing. Secured rotatably in upper and lower parts of housing of drive are respectively shaft and crankshaft which are interconnected by means of changeable gear train. Two overrunning clutches are mounted on shaft; one clutch is connected with handle to which muscle power is applied and second clutch is connected with pneumatic spring. Crank press-fitted on crankshaft is connected with slide block which is connected in its turn with angle levers rigidly connected with stalk of fin; lower crank which is also press-fitted on crankshaft is connected with lower slide block. Slide block and lower slide block are movable and are received by slots in drive housing. Pushers are movably mounted in slide blocks. Pushers are movable in slots owing to availability of threaded axles with adjusting wheels. Lower pusher is articulated with parallel link mechanism. Provision is made for change of crank angle.

EFFECT: increased speed; enhanced reliability; improved service characteristics; facilitated procedure of assembly.

3 cl, 3 dwg