Air filter

• US 6,926,759 B1
• Filed: 06/05/2003
• Issued: 08/09/2005
• Est. Priority Date: 06/05/2003
• Status: Expired due to Fees

• Current Assignee: Chin W. Lee, Nam H. Lee
• Original Assignee: Chin W. Lee, Nam H. Lee
• Inventors: Lee, Chin W., Lee, Nam H
• Primary Examiner(s): LAWRENCE JR, FRANK M
• Application Number:
  US10/454,982
• Time in Patent Office: 796 Days
• Field of Search: 952/16, 952/21, 952/26, 554/37, 554/47, 554/62, 554/71, 55D/IG.3, 962/79, 963/01, 963/06, 963/29, 963/48, 963/51
• US Class Current: 95/221
• CPC Class Codes: A47L 9/181 Separating by passing the air through a liquid bath
• CPC Class Codes: A47L 9/185 Means for the mechanical control of flow of air, e.g. deflectors, baffles or labyrinths
• CPC Class Codes: B01D 45/08 by impingement against baffle separators
• CPC Class Codes: B01D 45/14 generated by rotating vanes, discs, drums or brushes
• CPC Class Codes: B01D 47/021 by bubbling the gas through a liquid bath

Abstract

An air filter baffle unit that works with large type canister wet/dry type vacuums. The baffle unit also can be used in large air filter systems and can be ganged to increase filtering. The baffle unit has two sections that are connected for use. An inlet pipe is connected to the inlet of the vacuum. This inlet pipe directs the incoming dirt into the baffle unit, where it encounters a number of baffles and a water reservoir before it is expelled as clean air. In this baffle unit, there is no need for paper or other types of filters that must be periodically replaced. In this way, the baffle unit provides a simple, effective mechanism for filtering air using the wet/dry vacuum. The baffle unit can be also placed in an air filtering system that has a housing, an inlet and an outlet.

Claims

1. An air filter comprising:

a) a housing having an upper portion and a lower portion;

b) said upper portion having an air inlet side and an air outlet side, said upper portion further having a divider formed between said air inlet side and said air outlet side such that air cannot pass directly from the air inlet side to the air outlet side;

c) an air inlet port, formed in said air inlet side of said upper portion;

f) a first plurality of baffles, installed in said air inlet side of said upper portion;

g) a second plurality of baffles formed in said air outlet side of said upper portion;

h) an air outlet port, formed in said outlet side of said upper portion;

i) said lower portion of said housing having an air inlet side and an air outlet side, said lower portion further having a divider, having a top and a bottom, formed between said air inlet side and said air outlet side said divider having an opening at the bottom of said divider such that air can pass directly from the air inlet side to the air outlet side through said opening; and

j) a transfer tube, extending from said air inlet side of said upper portion to said air inlet side of said lower portion.

2. The air filter of claim 1 further comprising:

a) a first set of fixed fan blades, installed in said air inlet side of said upper portion.

3. The air filter of claim 1 further comprising:

a second set of fixed fan blades, installed in said outlet side of said upper portion.

4. The air filter of claim 1 further wherein said lower portion forms a water reservoir.

5. An air filtering system comprising:

a) an outer housing having an open top, a hollow inner cavity, having a bottom, and an inlet port;

b) an inlet tube, attached to said inlet port within the hollow inner cavity and extending down towards the bottom of said inner cavity;

c) an air filtering unit, positioned within said hollow inner cavity, said air filtering unit having;

i) a housing having an upper portion and a lower portion;

ii) said upper portion having an air inlet side and an air outlet side, said upper portion further having a divider formed between said air inlet side and said air outlet side such that air cannot pass directly from the air inlet side to the air outlet side;

iii) an air inlet port, formed in said air inlet side of said upper portion;

iv) a first plurality of baffles, installed in said air inlet side of said upper portion;

v) a second plurality of baffles formed in said air outlet side of said upper portion;

vi) an air outlet port, formed in said outlet side of said upper portion;

vii) said lower portion of said housing having an air inlet side and an air outlet side, said lower portion further having a divider, having a top and a bottom, formed between said air inlet side and said air outlet side said divider having an opening at the bottom of said divider such that air can pass directly fan the air inlet side to the air outlet side through said opening; and

viii) a transfer tube, extending from said air inlet side of said upper portion to said air inlet side of said lower portion; and

d) a vacuum motor, sealably attached to the open top of said canister and in operative communication with the air outlet of said air filtering unit.

6. The air filtering system of claim 5 further comprising an air outlet discharge port, in operative communication with said air outlet port of said air filtering unit.

7. The air filtering system of claim 5 further comprising;

a) a first set of fixed fan blades, installed in said air inlet side of said upper portion.

8. The air filtering system of claim 5 further comprising:

a second set of fixed fan blades, installed in said outlet side of said upper portion.

9. The air filtering system of claim 5 further wherein said lower portion forms a water reservoir.

10. A method of filtering air using an air filtering system having an outer housing having an open top, a hollow inner cavity, having a bottom, and an inlet port;

an inlet tube, having a base, attached to said inlet port within the hollow inner cavity and extending down towards the bottom of said inner cavity;

a air filtering unit having a housing having an upper portion and a lower portion said upper portion having an air inlet side and an air outlet side;

said upper portion further having a divider formed between said air inlet side and said air outlet side such that air cannot pass directly from the air inlet side to the air outlet side;

an air inlet port, formed in said air inlet side of said upper portion;

a first plurality of baffles, installed in said air inlet side of said upper portion;

a second plurality of baffles formed in said air outlet side of said upper portion;

an air outlet port, formed in said outlet side of said upper portion;

said lower portion of said housing having an air inlet side and an air outlet side, said lower portion further having a divider, having a top and a bottom, formed between said air inlet side and said air outlet side said divider having a plurality of holes positioned at the bottom of said divider such that air can pass directly from the air inlet side to the air outlet side through said plurality of holes; and

a transfer tube, extending from said air inlet side of said upper portion to said air inlet side of said lower portion;

comprising the steps of;

a) placing a quantity of water in the bottom of said hollow cavity sufficient to cover the base of said inlet tube;

b) placing said air filtering unit in said hollow cavity of said outer housing;

c) sealing said open top of said outer housing with said vacuum motor, such that said vacuum, motor is in operative communication with said air filtering unit; and

d) energizing said vacuum motor.

11. The method of filtering air of claim 10 further comprising the steps of:

a) after energizing said vacuum motor, causing an airflow to enter said outer housing through said air inlet port such that the airflow;

i) passes through said inlet tube into the bottom of said hollow inner cavity;

ii) passes through the quantity of water in the bottom of said hollow inner cavity;

iii) passes upward in the inlet side of the upper portion of said air filtering unit;

iv) passes through said first plurality of baffles in the upper portion of said air filtering unit;

v) passes through the transfer tube into the lower portion of said air filtering unit;

vi) passes through a second quantity of water contained in said lower portion of said air filtering unit;

vii) passes upward from said lower portion of said air filtering unit to the upper portion of said air filtering unit;

viii) passes through said second plurality of baffles in said upper portion of said air filtering unit; and

ix) passes into said outlet port on said air filter housing; and

b) discharging said airflow from said outer housing.