| 摘要 |
<p>A feed control apparatus for use in conjunction with a plumbing tool of the type used for cleaning and removing obstructions from drain pipes in which an elongated coiled spring wire, or plumber's snake, is advanced through the pipe and rotated. The feed control apparatus includes a novel combination snake feed and chucking device which supports the rotating snake at all times and automatically controls the rate of feed of the snake through the pipe in accordance with the resistance encountered. Upon the snake encountering a blockage in the pipe which results in torque buildup in the snake, the rate of feed will be automatically slowed to permit the snake to work its way past the obstruction. If the blockage cannot be penetrated so as to permit further advance of the snake, the rate of feed will automatically be reduced to zero, thereby preventing damage to the equipment or possible injury to the operator.</p> |
