Abstract: A pool hose air evacuation module includes a cover having an upstream connector, and a downstream connector. The cover includes a primary inlet port proximate the upstream connector and a secondary discharge port proximate the downstream connector. The module includes a main conduit, a primary conduit in fluid communication with the primary inlet port and the downstream connector, and a primary impeller mounted within the primary conduit that is configured to be driven by a pool water flow through the primary conduit when the valve is in a closed position. The module also includes a secondary conduit in fluid communication with the upstream conduit and the secondary discharge port, and a secondary impeller is mounted within the secondary conduit that is configured to be driven by the primary impeller to remove air from the pool hose.

Abstract: A drive track comprises a plurality of traction links connecting in an endless chain by a plurality of connecting links. Each traction link includes a traction pad having a traction face and a connection face, first and second connection passages being defined in the connection face. Each adjacent pair of the traction links is connected by an opposed pair of the connecting links. Each connecting link includes a connecting arm extending between first and second arm ends, first and second connecting posts extend inwardly from the first and second arm ends. Distal ends of the first and second connecting posts of each opposed pair of the connecting links interlock, respectively, within the adjacent first and second connection passages of each of the adjacent pairs of the traction links.

Abstract: A motor rotor structure includes a rotor irone core composed of a rotor section. The circumference of the rotor section is uniformly distributed with magnetic tile grooves. The magnetic tile grooves are located near the axis of the rotor section, and there are two limit edges that contract towards the axis of the rotor section. The two limit edges are connected to two convex edges extending towards the periphery of the rotor section. Between the two convex edges, there are limit protrusions that protrude towards the periphery of the rotor section. A limiting protrusion enables the permanent magnet to be stably placed in the magnetic tile groove, limiting its displacement during rotation and maintains the stability of the motor.