Abstract: A fluid dispensing pump that can be manufactured from as few as two parts: a stationary pump base (200) provided with an inlet passageway (201), and an integral pump top (300) provided with a fluid-tight attachment to the pump base and including a generally rigid core (310) and a self-restoring elastomeric layer (320). The generally rigid core (310) has a base attachment portion (311) and a dispensing valve core (315). The elastomeric layer (320) includes a resilient self-restoring pump wall (323) and a dispensing valve membrane (325). Upon assembly of the pump base and the pump top, a fully functional dispensing pump (100) is created with an inlet passageway (101), a one-way inlet valve (102), a self-restoring resilient pump cavity of variable volume (103) and a one-way dispensing valve (105). The one-way dispensing valve is preferably self-closing. The integral pump top (300) may have a rigid or semi-rigid actuator portion (314) bound to or imbedded into the resilient self-restoring pump wall (323).

Abstract: A spraying system having an actuator and a sprayer. The actuator may consist of a mechanical pump, a pneumatic or hydraulic valve, an electrical switch or any combination of the above and may be mounted in a trampoline or other playground equipment to be operated by the jumping or moving action of a user. With each bounce on the trampoline or movement of the playground equipment, the actuator may be activated to spray water on one or more of the users. In trampoline embodiments, the actuator may be mounted in place of one or more of the springs of a trampoline, while in other embodiments, the actuator may be mounted such that it is compressed between the jumping surface and a supporting surface, including the surface of the water in the case of a water trampoline.