Improvements in and relating to blade wheel propellers,particularly marine propellers.

摘要

1,052,763. Paddle wheel propellers. J. M. VOITH G.m.b.H. June 23, 1964 [June 28, 1963], No. 25865/64. Heading B7G. A paddle wheel propeller comprises blades 2 (Fig. 2, not shown) which are oscillated about their axes, as they rotate about the propeller axis, by linkages 6 connected to a control member 5 movable to vary the amplitude and phase of oscillation by servomotors 11, 21 (Fig. 3, not shown). Each chamber 16, 17, 26, 27 of the servomotors has a pressure relief valve 18a, 19b, 28a, 29b respectively, by which the load on the linkages and blades is limited. The valves may discharge into the opposite chamber (as shown), and may lie in axial passages in the pistons, or may discharge into a reservoir (Fig. 4, not shown).