Brushing – scrubbing – and general cleaning – Machines – With air blast or suction
Patent
1990-09-10
1992-03-31
Moore, Chris K.
Brushing, scrubbing, and general cleaning
Machines
With air blast or suction
15314, 200 819R, A47L 928
Patent
active
050995448
ABSTRACT:
Vacuum cleaning apparatus is disclosed with built in air pressure supply lines for operating pneumatic tools. An air operated valve switch actuator is coupled between the pneumatic air pressure and the vacuum motor to make the vacuum motor operate simultaneously with the pneumatic tool. Preferably the vacuum motor operates for a short period after the tool is turned off. The switch actuator has a piston and cylinder arrangement with an inlet and outlet connected in series in the pneumatic pressure line. When the tool is turned on, a pressure drop in a valve chamber adjacent to the outlet causes the piston to move to a forward position where a plunger actuates a vacuum motor switch. When the tool is turned off, pressure is equalized in the valve chamber through a narrow bleeder or by-pass channel. When the pressure is equalized, a spring biases the piston to a rearward position to de-actuate the vacuum motor switch.
REFERENCES:
patent: 2791657 (1957-05-01), Bloxsom et al.
patent: 2916576 (1959-12-01), Croskey et al.
patent: 3885267 (1975-05-01), Maurer et al.
patent: 4933516 (1990-06-01), Brown
Lipsitz Barry R.
Moore Chris K.
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