| 摘要 |
A rotatable hose coupling (10) is provided for use with a pool cleaner (12), particularly of the type powered by a suction or vacuum source via a flexible vacuum hose (16) or the like connected to the suction side of conventional pool water filtration equipment (14), wherein the rotatable hose coupling (10) is mounted inline along the vacuum hose (16) and responds to cyclic pressure differentials to index the hose (16) through a rotational increment each time the filtration equipment (14) is turned on and off. The rotatable hose coupling (10) comprises a tubular plunger (28) having one end received axially and slidably within a cam housing (34) defining an axially opposed and spaced-apart pair of cam surfaces (48, 50). At least one radially extending cam pin (52) carried by the plunger (28) engages the cam surfaces (48, 50) to rotatably index the cam housing (34) relative to the plunger (28) in response to axial back and forth displacement of the plunger (28) within the cam housing (34).
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