Pool pump filter
OwnerErnest D. Frasierinventor
Life of this patent
Estimating the term…
Abstract
A filter comprises a cage that captures a foraminous center tube. The cage comprises end plates secured to multiple posts. A screen is wrapped with at least one full inner wrap around the center tube and with at least one full outer wrap around the posts. The screen is held in place with elastic bands or the like that surround and press the outer wrap against the posts. The center tube may be free to move within the cage. Alternately, the center tube, end plates, and posts may be integral with each other. When inserted into a chamber, liquid flows through the screen outer and inner wraps in two stages. The liquid then flows through holes in the center tube, through the interior of the center tube, and out the chamber. The filter is cleaned by unwrapping the screen, cleaning it, and rewrapping it over the center tube and posts.
Claims40
A filter comprising:
- a. a cartridge comprising:
- i. first and second end plates at a predetermined distance apart, at least the first end plate having a central opening therethrough;
- ii. a center tube between the first and second end plates including a wall that defines at least one hole through;
- and
- iii. a plurality of posts extending between and secured to the end plates;
- b. a flexible screen having at least one first wrap around the center tube and at least one second wrap around the posts;
- and
- c. means for removeably holding the at least one screen second wrap against the posts.
Apparatus for filtering a fluid comprising:
- a. a cage comprising:
- i. a pair of end plates spaced a predetermined distance apart, at least one end plate having a central opening therethrough;
- and
- ii. at least three posts extending between and secured to the end plates;
- b. a center tube captured in the cage and having a wall that defines at least one hole therethrough;
- c. a screen having a first end laid against the center tube and a second end, the screen being wrapped with at least one first wrap around the center tube and with at least one second wrap around the posts, the screen second end being alongside the at least one second wrap;
- and
- d. means for holding the screen at least one second wrap against the posts.
In combination with a pump having a chamber with an open end and a fluid inlet passage to the chamber;
- a sealing ring removeably sealed to the chamber open end and having an outlet passage;
- and means for pumping fluid through the inlet passage to the chamber and out the sealing ring outlet passage,
- a two-sage filter insertable into and removable from the pump chamber comprising:
- a. a cartridge comprising a center tube having a foraminous wall, and a plurality of posts each secured to two spaced apart end plates having respective central openings and cooperating with the posts to capture the center tube between the end plates and posts;
- b. a screen having at least one first wrap around the center tube and at least one second wrap around the posts;
- and
- c. means for holding the at least one second wrap around the posts, so that a fluid pumped through the inlet passage to the chamber flows through the filter at least one second wrap, through the at least one first wrap, and through the center tube wall to the sealing ring outlet passage.
A method of assembling a filter comprising the steps of:
- a. providing first and second end plates at a predetermined distance apart;
- b. providing multiple posts, said multiple posts extending between and secured to said plates;
- c. capturing a foraminous center tube between the end plates and the posts;
- d. wrapping the screen with at least one inner wrap around the center tube;
- e. wrapping the screen with at least one outer wrap around the posts;
- and
- f. holding the at least one outer wrap against the posts.
A method of filtering a liquid comprising the steps of:
- a. providing a chamber having a inlet passage and an open end;
- b. sealing the chamber open end with a sealing ring having an outlet;
- c. providing a two-stage filter comprising the steps of;
- i. capturing a center tube having a foraminous wall between two end plates each secured to opposed ends of multiple posts;
- ii. wrapping a flexible screen with at least one inner wrap around the center tube;
- iii. wrapping the flexible screen with at least one outer wrap around the posts;
- and
- iv. surrounding and holding the at least one outer wrap against the posts;
- d. inserting the filter into the chamber;
- and
- e. flowing liquid through the inlet passage to the chamber, through the filter, and out the sealing ring outlet.
Dependencies are inferred from the claim text.