Cleaning and liquid contact with solids – Processes – Hollow work – internal surface treatment
Patent
1989-08-07
1990-06-12
Chambers, A. Michael
Cleaning and liquid contact with solids
Processes
Hollow work, internal surface treatment
134167C, 137 14, 13762415, B08B 300
Patent
active
049330187
ABSTRACT:
A method and apparatus provide for selective generation of pulses at water jets of a jet nozzle terminating a high pressure cleaning hose of a sewer cleaning machine. A ball valve is connected as a pressure bleeder to the high pressure side of the sewer cleaning machine pump and hence, the cleaning hose, for relieving pressure from the hose when the valve is open. A motor is connected to operate a rotatable element of the ball valve to automatically cycle the valve and generate a series of high pressure pulses at the water jets to thereby generate a hammering action to assist in penetration of blockages in a sewer being cleaned. The amplitude of the pulses is controlled by a second valve connected to the ball valve and the pulses preferably are generated at a frequency of approximately 3 hertz. The motor may be activated and deactivated by a blockage sensor which detects engagements of the nozzle with blockages formed by concentrations of refuse and debris within a sewer being cleaned.
REFERENCES:
patent: 1628530 (1927-05-01), Burnett
patent: 3600225 (1971-08-01), Parmelee
patent: 4170489 (1979-10-01), Magnus et al.
patent: 4361282 (1982-11-01), Di Vito
Chambers A. Michael
Sewer Rodding Equipment Co.
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