Vacuum cleaner exhaust filter
AssigneeQuality Products, Inc.
InventorRobin P. Scott
Life of this patent
Estimating the term…
Abstract
An exhaust filter for insertion into an exhaust port of a liquid bath vacuum cleaner has an elongated, tubular inlet secured to a lower housing, which lower housing is secured within an upper housing. The upper end of the tubular inlet extends into the upper housing and is provided with a flat top portion and a series of openings between angled vanes so as to direct air flow entering the tubular inlet evenly around the circumference of the angle vanes and through a HEPA filter sealingly secured between the lower and upper housings. Air flows through the HEPA air filter and out slotted openings in opposed ends of the exhaust filter. The flow of air at one end passes by a rotary blade having an indicator element thereon, which indicates the condition of the HEPA filter, and when the exhaust filter must be replaced.
Claims20
An exhaust filter for an exhaust port of a vacuum cleaner, comprising, in combination:
- a lower housing;
- an upper housing, having a hollow interior;
- said lower housing including an inlet port adapted to be connected into the exhaust port of a vacuum cleaner;
- said inlet port having an internal passageway extending into the hollow interior of the upper housing;
- said internal passageway ending in a flow control area having a wall portion and a plurality of side openings;
- an air filter held between the lower housing and the upper housing surrounding the plurality of side openings;
- and
- exit openings at opposed ends of the upper housing to allow air passing through the air filter to exit the upper housing.
An exhaust filter for an exhaust port of a vacuum cleaner, comprising, in combination:
- a lower housing having an elongated inlet with an internal passageway formed therein;
- an upper housing having a hollow interior secured to the lower housing;
- said lower housing elongated inlet adapted to be connected into an exhaust port of a vacuum cleaner;
- said internal passageway ending in a flow control means held in the hollow interior of the upper housing;
- said flow control means comprising a flat upper wall and a plurality of side openings with angled vanes thereon;
- a HEPA air filter sealingly held between the lower housing and the upper housing surrounding the flow control means;
- a plurality of exit openings at opposed ends of said upper housing to allow air passing through the air filter to exit the upper housing;
- and
- an indicating means rotatably held in said upper housing adjacent said plurality of exit openings in one of said opposed ends.
An exhaust filter for a vacuum cleaner, comprising, in combination:
- a vacuum cleaner having an exhaust port;
- said exhaust filter having a lower housing and an upper housing secured together to form a hollow interior;
- said lower housing including an inlet port connected into said exhaust port;
- said inlet port having an internal passageway extending into the hollow interior of the upper housing;
- said internal passageway ending in a flow control area having a wall portion and a plurality of side openings;
- a HEPA filter securely held between said lower housing and said upper housing in said hollow interior surrounding said plurality of side openings;
- a plurality of exit openings formed at opposed ends of said upper housing to allow air passing through said HEPA air filter to exit from said upper housing;
- and
- a rotary indicating means held in said upper housing adjacent one of said opposed ends.
Dependencies are inferred from the claim text.