Air filter

• US 5,848,592 A
• Filed: 09/25/1995
• Issued: 12/15/1998
• Est. Priority Date: 09/25/1995
• Status: Expired due to Fees

• Current Assignee: Nels B. Sibley
• Original Assignee: Nels B. Sibley
• Inventors: Sibley, Nels B.
• Primary Examiner(s): Weiss, John G.
• Assistant Examiner(s): SRIVASTAVA, VIRENDRA KUMAR
• Application Number:
  US08/532,990
• Time in Patent Office: 1,177 Days
• Field of Search: 128/209.27, 128/205.28, 128/205.29, 128/204.15, 128/204.16, 128/200.11, 128/200.12, 128/200.13
• US Class Current: 128/205.27
• CPC Class Codes: A62B 23/00 Filters for breathing-protection purposes gas-filters in general B01D
• CPC Class Codes: A62B 9/003 Means for influencing the temperature or humidity of the breathing gas
• CPC Class Codes: B01D 47/021 by bubbling the gas through a liquid bath

Abstract

A personal use air filter includes a water chamber through which the air is initially bubbled to remove particulates, vapors and gases and to humidify and cool the air before it is delivered to the user. In most cases additional filtering is provided downstream of the water bath using an adsorbent filter or an adsorbent filter in combination with a particulates filter. The unit may be power operated using batteries contained within the housing in a sealed battery compartment.

Claims

1. A personal use air filter comprising:

a housing;

a single water chamber in the housing containing a body of water, a gas adsorbent substance dissolved in the water, and air above the water;

an air inlet into the housing, opening into said water chamber above the body of water;

inlet air duct means comprising a flexible tube having an upper end secured to the air inlet, a lower end extending into the body of water for ducting air from the inlet into the body of water and a weight on a lower end of the flexible tube;

an air outlet from the housing, opening directly into said water chamber above the body of water; and

filter means comprising a bed of filtering material extending across the air outlet for filtering air passing through the air outlet.

2. A filter according to claim 1 wherein the filter means comprise a bed of adsorbent material.

3. A filter according to claim 2, wherein the filter means further comprise a particulates filter for filtering particulate material from air passing therethrough.

4. A filter according to claim 1 including air blower means for forcing air through the filter.

5. A filter according to claim 4 wherein the air blower is in the air outlet.

6. A filter according to claim 4 including battery means for operating the air blower.

7. A filter according to claim 1 including means for attaching the filter to a user'"'"'s body.

8. A filter according to claim 1 wherein the housing has a base portion with an open top and a removable cover.

9. A filter according to claim 8 wherein the air inlet comprises an opening in a side wall of the base portion of the housing.

10. A filter according to claim 8 wherein the air outlet comprises an opening in the cover of the housing.

11. A filter according to claim 10 including a recess in the cover, around the outlet opening and wherein the filter means comprise a filter canister in the recess.

12. A personal use air filter comprising:

a housing;

a single water chamber in the housing containing a body of water, a surfactant dissolved in the water, and air above the water;

an air inlet into the housing, opening into said water chamber above the body of water;

inlet air duct means comprising a flexible tube having an upper end secured to the air inlet, a lower end extending into the body of water for ducting air from the inlet into the body of water and a weight on a lower end of the flexible tube;

an air outlet from the housing, opening directly into said water chamber above the body of water; and

filter means comprising a bed of filtering material extending across the air outlet for filtering air passing through the air outlet.

13. A filter according to claim 12 wherein the filter means comprise a bed of adsorbent material.

14. A filter according to claim 12 including air blower means for forcing air through the filter.

15. A filter according to claim 13 wherein the filter means further comprise a particulates filter for filtering particulate material from air passing therethrough.

16. A filter according to claim 12 including air blower means for forcing air through the filter.

17. A filter according to claim 16 wherein the air blower is in the air outlet.

18. A filter according to claim 17 including battery means for operating the air blower.

19. A filter according to claim 12 including means for attaching the filter to a user'"'"'s body.