Port rodder with anti-drift feature

Details Port rodder with anti-drift feature Port rodder with anti-drift feature

1991-01-24

1991-12-10

Favors, Edward G.

Liquid heaters and vaporizers

Cleaning

1101825, 122 65, 122 66, 266269, F22B 3718, F22B 3748

Patent

active

050708236

ABSTRACT:
An anti-drift mechanism for a downwardly oriented port rodder for cleaning a port opening of a recovery boiler. The anti-drift mechanism prevents a cutter of the rodder from accidentally drifting from a retracted holding position into the port upon the loss of holding power to the actuator. Two embodiments are disclosed. The first is a frictional engagement with the port rodder while the second involves the use of a valve in conjuction with the actuator to trap fluid pressure and maintain the rodder in the holding position.

REFERENCES:
patent: 3943861 (1976-03-01), Astrom et al.
patent: 4099471 (1978-07-01), Sander et al.
patent: 4653409 (1987-03-01), Eriksson
patent: 4822428 (1989-04-01), Goodspeed
patent: 4838182 (1989-06-01), Goodspeed

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