Rotatable hose coupling

A rotatable hose coupling for mounting in-line with a flexible hose coupled between a pool cleaner and a fluid pressure source, said rotatable hose coupling comprising:

• a generally cylindrical plunger defining a flow passage therethrough;
• a generally cylindrical cam housing defining a fluid passage therethrough, said fluid passage of said cam housing including a slide bore for axially and slidably receiving one end of said plunger, said cam housing further defining a radially enlarged internal stepped bore segment with first and second cam surfaces disposed in axially opposed and spaced-apart relation at opposite axial ends thereof;
• at least one cam pin carried by said plunger and projecting radially outwardly therefrom into said stepped bore segment in a position axially between said first and second cam surfaces defined by said cam housing, said at least one cam pin being respectively engageable with said first and second cam surfaces upon relative back-and-forth axial displacement between said plunger and said cam housing for effecting incremental part-circle relative rotation therebetween;
• and
• means for effecting relative back-and-forth axial displacement between said plunger and said cam housing in response to cyclic on-off operation of the fluid pressure source.

In a pool cleaner system for a swimming pool said pool cleaner system including a pool cleaner for traversing submerged pool surfaces to collect debris, a filtration system including a pump for circulating water from the pool through a filter unit, and a flexible hose for coupling the pool cleaner with the pump, a rotatable hose coupling comprising:

• a first housing member defining a flow passage therethrough;
• a second housing member defining a flow passage therethrough including a slide bore for axially and slidably receiving one end of said first housing member;
• cam means carried by said first and second housing members for effecting relative rotation therebetween through a part-circle increment in response to axial back-and-forth displacement of said first housing member relative to said second housing member;
• arid
• means responsive to cyclic on-off operation of the pump for axially displacing said first housing member in one direction relative to said second housing member when the pump is turned on, and for axially displacing said first housing member in an opposite direction relative to said second housing member when the pump is turned off.