Dust prevention and removal device

• US 8,328,894 B2
• Filed: 08/20/2009
• Issued: 12/11/2012
• Est. Priority Date: 08/20/2008
• Status: Active Grant

• Current Assignee: SC Johnson & Son Incorporated
• Original Assignee: SC Johnson & Son Incorporated
• Inventors: Thurin, Matthew N., Knopow, Jeremy F., Sanders, Patrick C., Bates, Julie L., Leifheit, David H., Sharma, Nitin, Wietfeldt, John R.
• Primary Examiner(s): Smith, Duane
• Assistant Examiner(s): Hawkins, Karla
• Application Number:
  US12/544,393
• Publication Number:
  US 20100064895A1
• Time in Patent Office: 1,209 Days
• Field of Search: 55414-417, 551/67, 55496-497, 555/06, 554/71, 961/34, 962/22, 963/99, 415/77, 415/220, 952/73
• US Class Current: 55/467
• CPC Class Codes: F24F 1/0071 with means for purifying supplied air perfuming or deodorising means F24F1/008
• CPC Class Codes: F24F 2221/12 transportable
• CPC Class Codes: F24F 8/10 by separation, e.g. by filtering
• CPC Class Codes: F24F 8/108 using dry filter elements
• CPC Class Codes: F24F 8/80 Self-contained air purifiers

Abstract

A device is provided that is capable of circulating air throughout a personal space as well as collecting and preventing the build up of dust and other particulate matter by drawing in air from the surrounding environment and removing some dust, allergens and other such particulate matter therefrom. The filtered air is then expelled out of the device and back into the surrounding environment. The device includes a housing defining an interior space having a motor and fan assembly disposed therein. The housing includes an inlet with a filter provided therein such that air drawn in through the inlet is filtered. The air is then expelled through a circumferentially disposed outlet. The filter element preferably includes a lock and key system configured to prevent operation of the device in the absence of a properly keyed filter.

Claims

1. A dust prevention and removal device comprising;

a housing defining an interior space and having a circumferential sidewall;

an inlet disposed on the housing, the inlet defining a frame;

an outlet circumferentially disposed on the sidewall of the housing;

a motor in communication with a fan for driving the fan to draw air into the interior space through the inlet and out through the outlet;

a filter secured in the frame of the inlet;

wherein the filter and the frame are sized and shaped to cooperate with one another and the device such that the device will not operate unless the filter is secured to the frame.

2. The dust prevention and removal device of claim 1, wherein the fan comprises an upper portion and a lower portion and wherein the upper and lower portion have a plurality of blades disposed thereon for drawing air in through the inlet and out through the outlet.

3. The dust prevention and removal device of claim 2, wherein the blades on the upper portion of the fan are radially disposed thereon and configured for drawing air in through the inlet.

4. The dust prevention and removal device of claim 3, wherein the blades on the lower portion of the fan are curved and circumferentially disposed about the lower portion in an overlapping configuration.

5. The dust prevention and removal device of claim 4, wherein the blades on the lower portion are configured to circulate air through the interior space occupied by the motor to thereby keep the motor cool.

6. The dust prevention and removal device of claim 5, wherein the blades on the lower portion are configured to prevent access by a user to the motor.

7. The dust prevention and removal device of claim 2, wherein the plurality of blades on the upper portion and the lower portion of the fan comprise a prime number of blades.

8. The dust prevention and removal device of claim 1, further comprising a lock and key assembly for selective engagement with a power source so as to selectively provide power to the dust prevention and removal device, the lock and key assembly comprising:

a magnet disposed in an upper portion of the housing;

a conductor disposed in the housing;

a reed switch disposed in the housing in communication with the conductor;

wherein upon securing of a filter to the frame, the upper portion of the housing is rotatable with respect to a lower portion of the housing to position the magnet in communication with the conductor such to complete a circuit configured to power the device.

9. The dust prevention and removal device of claim 8, further comprising a lever engaged with the frame and configured to prevent rotation of the upper portion of the housing in the absence of a filter.

10. The dust prevention and removal device of claim 9, wherein the lever is disengaged upon insertion of the filter into the frame.

11. The dust prevention and removal device of claim 1, further comprising a lock and key assembly for selective engagement with a power source so as to selectively provide power to the dust prevention and removal device, the lock and key assembly comprising

an actuator rod longitudinally disposed through a center of the interior space of the device and having an upper end thereof secured to the frame;

a lever hingedly coupled to a bottom surface of the interior space of the device and having an arm biased upwardly therefrom by a compressible member;

a switch positioned to be actuatable by the lever arm for providing power to the device;

wherein securing the filter within the frame applies a downward force upon the actuator rod such that a lower end thereof biases the lever arm downwardly and into contact with the switch to power the device.

12. The dust prevention and removal device of claim 1, further comprising a lock and key assembly for selective engagement with a power source so as to selectively provide power to the dust prevention and removal device, the lock and key assembly comprising a downwardly extending rod secured to the frame;

and

a switch actuatable by the rod for powering the device;

wherein securing the filter within the frame applies a downward force to the rod such that the rod actuates the switch to supply power to the device.

13. The dust prevention and removal device of claim 1, wherein the device is prevented from operating unless the filter is secured to the frame by a lock and key assembly comprising:

a downwardly extending tab secured to the frame;

a plunger and spring assembly; and

a switch actuatable by the plunger for powering the device;

wherein securing the filter within the frame applies a downward force to the tab such that the tab communicates with the plunger which actuates the switch to supply power to the device; and

wherein removing the filter from the frame removes the downward force from the plunger thereby causing the spring to restore the plunger to a position which deactivates the switch.

14. The dust prevention and removal device of claim 1, wherein the filter comprises one of a dome or concave shape for increasing an effective surface area of the filter.

15. The dust prevention and removal device of claim 1, wherein the filter includes a plurality of folds configured to increase an effective surface area of the filter.

16. The dust prevention and removal device of claim 1, wherein the filter is impregnated with one of a tacky and deodorizing chemical.

17. A dust prevention and removal device comprising;

a housing defining an interior space;

an air inlet disposed on the housing for drawing air into the interior space, the air inlet defining a frame on an upper portion of the housing;

an air outlet disposed on the housing for expelling the air wherein the airflow is expelled around substantially 360 degrees of the circumference;

a filter secured to the housing within the frame; and

a motor in communication with a fan for driving the fan to draw air into the interior space through the inlet and out through the outlet;

18. A dust prevention and removal device comprising;

a housing defining an interior space;

an air inlet disposed on the housing and in communication with the interior space, the inlet being positioned on an upper portion of the housing for drawing air into the interior space along a substantially vertical axis;

an air outlet circumferentially disposed around the housing and in communication with the interior of the housing for expelling air from the interior space to a surrounding area along a substantially horizontal axis, and wherein the air outlet comprises a plurality of horizontally extending rungs circumferentially supported by a plurality of spaced vertical struts wherein the rungs and struts define a plurality of apertures;

a filter secured to the housing and positioned between the inlet and the interior space, the filter having a frame configured to cooperate with a portion of the inlet for supporting the filter therein;

a fan positioned within the interior space, wherein the fan comprises an upper surface and a lower surface, the upper and lower surfaces each having a plurality of blades radially disposed thereon;

a motor in communication with a power source and having an output shaft coupled to the fan for driving the fan; and

a lock and key device coupled to the filter and selectively engageable with the motor to operate the dust prevention device.

19. The dust prevention and removal device of claim 18, wherein the lock and key device comprises a plurality of taps extending downwardly from a bottom surface of the filter frame and configured to selectively engage a plunger for actuating a switch to provide power to the device.

20. The dust prevention and removal device of 19, further comprising a spring selectively engageable with the plunger, wherein removal of the filter frame biases the spring against the plunger to a position wherein the switch is deactivated and power is removed from the device.