US2012222252A1PendingUtilityA1

Surface cleaning apparatus

48
Assignee: CONRAD WAYNE ERNESTPriority: Mar 4, 2011Filed: Mar 4, 2011Published: Sep 6, 2012
Est. expiryMar 4, 2031(~4.6 yrs left)· nominal 20-yr term from priority
Inventors:Wayne Ernest Conrad
A47L 9/106A47L 5/32A47L 9/1666A47L 9/1608A47L 7/0038A47L 9/1691A47L 9/1683A47L 5/24A47L 5/362A47L 7/0023
48
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Claims

Abstract

A surface cleaning apparatus comprises an air flow path extending from a dirty air inlet to a clean air outlet and includes a suction motor. The surface cleaning apparatus may be battery powered and/or may have a power requirement of 200 Watts or less. A cyclone chamber may be provided in the air flow path and may comprise a cyclone air inlet having a height, a cyclone air outlet and a screen surrounding the cyclone air outlet. The cyclone air outlet may comprise a passage that extends into the cyclone chamber less than the height of the cyclone inlet.

Claims

exact text as granted — not AI-modified
1 . A battery operated surface cleaning apparatus comprising:
 (a) an air flow path extending from a dirty air inlet to a clean air outlet and including a suction motor;   (b) a cyclone chamber provided in the air flow path and comprising a cyclone air inlet having a height, a cyclone air outlet and a screen surrounding the cyclone air outlet, wherein the cyclone air outlet comprises a passage that extends into the cyclone chamber less than the height of the cyclone inlet; and,   (c) at least one battery operably connected to the suction motor.   
     
     
         2 . The surface cleaning apparatus of  claim 1  wherein the at least one battery produces less than 50 air watts and an air flow rate less than 1.3 m 3 /minute. 
     
     
         3 . The surface cleaning apparatus of  claim 1  wherein the at least one battery produces less than 40 air watts and an air flow rate less than 1.2 m 3 /minute. 
     
     
         4 . The surface cleaning apparatus of  claim 1  wherein the at least one battery produces less than 30 air watts and an air flow rate less than 1.1 m 3 /minute. 
     
     
         5 . The surface cleaning apparatus of  claim 1  wherein the passage is provided in a wall of the cyclone chamber and passage has a thickness proximate a thickness of the wall. 
     
     
         6 . The surface cleaning apparatus of  claim 1  wherein the cyclone air inlet and the cyclone air outlet are provided at a first end of the cyclone chamber. 
     
     
         7 . The surface cleaning apparatus of  claim 6  wherein the cyclone chamber further comprises a dirt outlet and the dirt outlet is at a second end of the cyclone chamber opposed to the first end. 
     
     
         8 . The surface cleaning apparatus of  claim 1  wherein the screen has a plurality of openings that are less than 8 mm in size. 
     
     
         9 . The surface cleaning apparatus of  claim 1  wherein the screen has a plurality of openings that are less than 6 mm in size. 
     
     
         10 . The surface cleaning apparatus of  claim 1  wherein the screen has a plurality of openings that are less than 4 mm in size. 
     
     
         11 . The surface cleaning apparatus of  claim 1  wherein the screen has a plurality of openings that are less than 2 mm in size. 
     
     
         12 . The surface cleaning apparatus of  claim 1  wherein the screen is cylindrical in shape. 
     
     
         13 . The surface cleaning apparatus of  claim 1  wherein the screen is frusto-conical in shape. 
     
     
         14 . The surface cleaning apparatus of  claim 1  wherein the screen has a height that is from 0.5 to 4 times the height of the cyclone air inlet. 
     
     
         15 . The surface cleaning apparatus of  claim 1  wherein the screen has a height that is from 1 to 3 times the height of the cyclone air inlet. 
     
     
         16 . The surface cleaning apparatus of  claim 1  wherein the screen has a height that is about twice the height of the cyclone air inlet. 
     
     
         17 . A surface cleaning apparatus comprising:
 (a) an air flow path extending from a dirty air inlet to a clean air outlet and including a suction motor having a power requirement of 200 Watts or less and;   (b) a cyclone chamber provided in the air flow path and comprising a cyclone air inlet having a height, a cyclone air outlet and a screen surrounding the cyclone air outlet, wherein the cyclone air outlet comprises a passage that extends into the cyclone chamber less than the height of the cyclone inlet.   
     
     
         18 . The surface cleaning apparatus of  claim 17  wherein the surface cleaning apparatus produces less than 50 air watts and an air flow rate less than 1.3 m 3 /minute. 
     
     
         19 . The surface cleaning apparatus of  claim 17  wherein the surface cleaning apparatus produces less than 40 air watts and an air flow rate less than 1.2 m 3 /minute. 
     
     
         20 . The surface cleaning apparatus of  claim 17  wherein the surface cleaning apparatus produces less than 30 air watts and an air flow rate less than 1.1 m 3 /minute. 
     
     
         21 . The surface cleaning apparatus of  claim 17  wherein the passage is provided in a wall of the cyclone chamber and passage has a thickness proximate a thickness of the wall. 
     
     
         22 . The surface cleaning apparatus of  claim 17  wherein the cyclone air inlet and the cyclone air outlet are provided at a first end of the cyclone chamber. 
     
     
         23 . The surface cleaning apparatus of  claim 22  wherein the cyclone chamber further comprises a dirt outlet and the dirt outlet is at a second end of the cyclone chamber opposed to the first end. 
     
     
         24 . The surface cleaning apparatus of  claim 17  wherein the screen has a plurality of openings that are less than 8 mm in size. 
     
     
         25 . The surface cleaning apparatus of  claim 17  wherein the screen has a plurality of openings that are less than 6 mm in size. 
     
     
         26 . The surface cleaning apparatus of  claim 17  wherein the screen has a plurality of openings that are less than 4 mm in size. 
     
     
         27 . The surface cleaning apparatus of  claim 17  wherein the screen has a plurality of openings that are less than 2 mm in size. 
     
     
         28 . The surface cleaning apparatus of  claim 17  wherein the screen is cylindrical in shape. 
     
     
         29 . The surface cleaning apparatus of  claim 17  wherein the screen is frusto-conical in shape. 
     
     
         30 . The surface cleaning apparatus of  claim 17  wherein the screen has a height that is from 0.5 to 4 times the height of the cyclone air inlet. 
     
     
         31 . The surface cleaning apparatus of  claim 17  wherein the screen has a height that is from 1 to 3 times the height of the cyclone air inlet. 
     
     
         32 . The surface cleaning apparatus of  claim 17  wherein the screen has a height that is about twice the height of the cyclone air inlet.

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