Automatic air evacuation appratus for swimming pool and spa filters

摘要

The present invention is an air evacuation apparatus that prevents the accumulation of air inside a swimming pool or spa filter by allowing any air to be removed from inside the filter every time the swimming pool pump is turned on. By allowing air to be removed from the filter, the present invention prevents the build-up of dangerous levels of potential energy caused by compressed air inside the filter that can lead to the violent separation of the filter. More important, the air evacuation apparatus of the present invention allows air to be safely and automatically removed from inside of the filter without interfering with the functionality of the filter.

主权项

1. An automatic air evacuation apparatus attached to a swimming pool or spa filter having an interior comprising:
a valve body having a cavity, a top end, and a bottom hole that is in communication with said interior of said swimming pool or spa filter; an internal assembly comprising a ball retainer attached to an upper ball shield; a lower ball that is within said ball retainer; an upper ball that is within said upper ball shield; a top cover attached to said top end of said valve body and having an exhaust hole; wherein said upper ball shield comprising an annular sidewall with a plurality of flaps protruding outwardly therefrom that align said internal assembly within said cavity such that said lower ball sits directly on top of said bottom hole; wherein said internal assembly sits within said cavity with said lower ball sitting on said bottom hole: whereby said lower ball is pushed upward by air flowing from said interior of said swimming pool or spa filter into said cavity through said bottom hole; whereby said upper ball is pushed upward by water flowing from said interior of said swimming pool or spa filter into said cavity through said bottom hole until said upper ball seals said exhaust hole; and whereby said water flowing from said cavity back into said swimming pool or spa filter forces said lower ball to seal said bottom hole and said upper ball to unseal said exhaust hole.