Flex coupling assembly with restrictive bending feature

A flex coupling assembly for coupling a first shaft of a shaft assembly to a second shaft of the shaft assembly, comprising:

• a lower housing having a generally cylindrical housing wall extending along an axis and bounding a cavity between a lower housing first end and a lower housing second end, said lower housing first end having an end face extending generally transversely to said axis and generally closing off said cavity and said lower housing second end being generally open to said cavity;
• a first shaft fixed to said end face of said lower housing and extending along said axis away from said cavity;
• an upper flange spaced axially from said lower housing;
• a second shaft fixed to said upper flange and extending along said axis;
• a retention member disposed in said cavity of said lower housing and being fixed to said upper flange by a plurality of retention fastener members;
• a resilient flex coupling sandwiched between said end face of said lower housing and said flange, said resilient flex coupling being fixed to said upper flange and to said retention member by said plurality of retention fastener members, said resilient flex coupling being fixed to said lower housing by a plurality of coupling fastener members,
• wherein said lower housing and said upper flange are moveable relative to one another axially along said axis and rotatably about said axis via flexing of said resilient flex coupling.