WATER DISPLACEMENT PUMP Russian patent published in 2012 - IPC F01C1/63 F04C2/63 

FIELD: engines and pumps.

SUBSTANCE: proposed pump comprises constant-section annular channel arranged in water intake-discharge wall with two pairs of pistons 4 and 5, each being arranged between pistons 4 and 5 of other pair. Said pairs of pistons are rigidly coupled with aligned half shafts articulated with drive shafts via propeller shaft to drive the latter with pistons 4 and 5 in said annular channels intermittently at regular rotation of drive shaft. Angular size of piston does not exceed angular size of intake-discharge opening. Maximum tolerable angular size of piston is defined by claimed formula. Bend angle of propeller shaft gimbal joints are set in compliance with claimed formula.

EFFECT: higher efficiency and reliability.

2 cl, 8 dwg