Apparatus for cleaning blackboards

Details Apparatus for cleaning blackboards Apparatus for cleaning blackboards

1993-01-28

1994-06-14

Coe, Philip R.

Brushing, scrubbing, and general cleaning

Machines

Wiping

15 522, 15103, 152201, 15246, A47L 100

Patent

active

053198204

ABSTRACT:
An apparatus for cleaning a blackboard mounted on a wall including a cleaning head pivotally mounted on a vertical rod so as to be slidable vertically along the rod and rotatable about a vertical axis, into and out of cleaning engagement with the blackboard. At its upper and lower extremities, the rod is secured to a pair of carriages connected together and respectively horizontally movable, by rolling, along top and bottom channel tracks fixedly mounted on the wall respectively above and below the board. The cleaning head includes a sponge holder connected to the vertical rod by brackets and a sponge having a backing removably secured to the holder.

REFERENCES:
patent: 998579 (1911-01-01), Herz
patent: 1416280 (1922-05-01), Gazdzicki
patent: 2167296 (1939-07-01), Farmer
patent: 2435862 (1948-02-01), Wilson
patent: 3163943 (1965-01-01), Bell
patent: 3218663 (1965-11-01), Battista
patent: 3731335 (1973-05-01), Chrisp
patent: 3858265 (1975-01-01), Schlick
patent: 4257138 (1981-03-01), Clements
patent: 4946513 (1990-08-01), Del Prato
patent: 5167720 (1982-12-01), Diamond
patent: 5179758 (1993-01-01), Smith

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