Resilient rotary coupling

F - Mech Eng,Light,Heat,Weapons – 16 – D

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115/22, 64/7

F16D 3/76 (2006.01)

Patent

CA 1169669

ABSTRACT RESILIENT ROTARY COUPLING A resilient rotary coupling 10 and a marine drive 18 including same are described. The coupling 10 includes inner and outer rotary members 14,12, respectively. The inner sur- face 18 of the outer rotary member 12 and the periphery 26 of the inner member 14 are of similar configuration and include, when viewed in cross section, at least two arcs of greater radius of curvature symmetrically disposed about the axis of rotation 23 connected in alternate manner by an equal number of arcs of lesser radius of curvature, the arcs of greater radius of curvature being located closer to the axis of rotation 23 than the arcs of lesser radius of curvature, the center of curvature of each of said arcs lying on or within the boundary of the closed figure defined by the inner surface 18 in said section. The arcs are connected to one another without any abrupt change of radius or radius of curvature. Resilient means 17 are disposed between the outer and inner rotary members 12,14, respectively. The resilient means 17 is in radial com- pression and contacts completely in the circumferential direction of the members 12,14 at least a portion of the inner surface 18 of the outer member 12 and the periphery 26 of the inner member 14. The coupling 10 may be designed so as to permit slippage upon application of loads in excess of design or to permit torsional shock absorption up to a maximum torque load at which time the inner and outer rotary members 14,12, respectively mechanically lock up relative to one another thereby preventing further angular displacement of them relative to one another.

383153

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