Blackboard eraser

Details Blackboard eraser Blackboard eraser

2005-05-24

2005-05-24

Chin, Randall (Department: 1744)

Brushing, scrubbing, and general cleaning

Machines

Wiping

C015S027000, C015S210100, C015S221000, C434S417000

Reexamination Certificate

active

06895627

ABSTRACT:
A blackboard eraser including a cube having two semi-cylindrical grooves symmetrically arranged in a longitudinal direction therein, and a central brush atop an elevated surface formed between the two grooves. A longitudinal groove is defined underneath each of the send-cylindrical grooves, and equal-length side brushes, which are affixed to an inner surface of a lid, are respectively positioned in the longitudinal grooves. Two grooves are arranged adjacent to each end of the semi-cylindrical grooves, which provide for a shaft affixed to each end of a roller to dispose therein. The brushes and the rollers form the eraser, which are enclosed within a closed chamber between the lid and the two semi-cylindrical grooves. When erasing chalk dust from a blackboard, the chalk dust sticks to the rollers and is carried to the side brushes. The side brushes then wipes the dust, which falls into the closed chamber.

REFERENCES:
patent: 1487052 (1924-03-01), Enomoto
patent: 3160163 (1964-12-01), Bolinger
patent: 4232871 (1980-11-01), Horian et al.
patent: 4642835 (1987-02-01), Schmitz
patent: 4742594 (1988-05-01), Chen
patent: 4941225 (1990-07-01), Liao
patent: 2090123 (1982-07-01), None

Affiliated with

Also associated with

Rating

Blackboard eraser does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Blackboard eraser, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Blackboard eraser will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3415612