Electric board cleaner

• US 5,537,711 A
• Filed: 05/05/1995
• Issued: 07/23/1996
• Est. Priority Date: 05/05/1995
• Status: Expired due to Fees

• Current Assignee: Yu-Che Tseng
• Original Assignee: Yu-Che Tseng
• Inventors: Tseng, Yu-Che
• Primary Examiner(s): Graham, Gary K.
• Application Number:
  US08/435,999
• Time in Patent Office: 445 Days
• Field of Search: 15/344, 15/347, 15/412, 15/98, 15/102, 15/339, 15/400, 15/410, 15/419.1, 15/416, 15/417, 15/422, 15/398
• US Class Current: 15/344
• CPC Class Codes: A47L 5/24 Hand-supported suction cleaners
• CPC Class Codes: B43L 21/02 with means for absorbing the chalk dust

Abstract

An electric board cleaner having a housing formed of two half housings, an absorbing head having a mouth for fixing a cleaning pad, a motor with a fan vertically located in a chamber in the housing, a dust net contained in a dust chamber in the housing, a film horizontally held at a lower end of the absorbing head and able to be tilted open by a sucking force of the fan. The cleaning pad is brought into contact with the surface of a blackboard to rub and wipe chalk powder off by turning on the motor. The dust net is removable for emptying the powder stored therein.

Claims

1. An electric board cleaner comprising:

a hollow housing having approximately a T shape, said housing having a grip formed in a lower portion, a dust chamber formed in an upper portion, a pair of horizontal grooves provided inside adjacent said dust chamber, and a power switch fixed on an outer side surface of the grip;

a motor attached within and to said housing by means of a position plate fitted into said horizontal grooves, said motor having a shaft with an upper end extending into said dust chamber, said upper end having a fan fixed thereon, said motor being electrically coupled with said switch;

a dust net with an upper open side located within said dust chamber;

a hollow absorbing head with a mouth opening and a lower opening, said mouth opening being elongated defining upper and lower side edges, each side edge including an elongated brushing strip attached thereto, said lower opening having a lower short circumferential wall therearound, said wall engaging around an upper end of said upper portion above said dust chamber for detachably securing said head to said housing, a plurality of lateral fitting bars are provided on said head within said mouth opening;

a flexible film affixed to said head and covering said lower opening, wherein said film closes the lower opening in an unbiased state and is displaced by suction of the fan of the motor when the motor is turned on to allow debris to pass through said head and into the net within said dust chamber;

a cleaning pad located in the mouth opening of the absorbing head and engaging the lateral fitting bars of said absorbing head; and

,

a battery case removably fitted in the lower portion of said housing, said lower portion having a removable cap to enable removal of said case from said housing, said battery case having at least one battery therein, and said at least one battery being electrically coupled with said switch;

whereby

said motor is turned on by said power switch to rotate the fan to draw air mixed with chalk powder from outside of the mouth opening of said absorbing head, around the cleaning pad, through the head and past the film, which is biased open by suction force of the fan, and into said dust net, when said cleaning pad contacts a surface of a blackboard and is rubbed thereon to wipe chalk powder.

2. The electric board cleaner as claimed in claim 1, wherein said housing comprises two half housings each having a plurality of threaded holes for screws to attach said two half housings together, and each having a U-shaped upper short wall formed in the upper portion for attachment of the lower end of said absorbing head.

3. The electric board cleaner as claimed in claim 2, wherein;

one of said half housings has a stop block in an inner surface of a bottom thereof and the power switch is fixed to said one half housing; and

both half housings have a second chamber for receiving said motor therein.

4. The electric board cleaner as claimed in claim 2, wherein said absorbing head lower short circumferential wall fits around said upper short wall of said two half housings.