Circular eccentric 1 rotates about fixed axis A and is connected by a turning pair to sleeve d of link 2. Rigidly attached to sleeve d is concentric sleeve e which has head f sliding in fixed guide slot k of housing 4. When eccentric 1 rotates, sleeves d and e roll and slide around sleeves p and r, which are parts of housing 4. Link 3 is connected by a turning pair to sleeve p and its shank m is connected by a sliding pair to bearing member 5 which, in turn, is connected by a turning pair to sleeve e. Link 3 an its shank separate the suction and discharge chambers formed by sleeves d, e, p and r. Liquid enters and exits through channels a and b.
$3843$LHP,RP$