Ingersoll-rand Company

Raymond M Jordan

Jose P Munoz

A waterjet cutting apparatus for limiting pressure spikes caused by hydraulic pressure surges. A hydraulic pump pressurizes hydraulic fluid used to operate the apparatus. An intensifier is driven by the pump. An on-off nozzle valve actuator is coupled to the pump and to the intensifier. First and second linkages are provided. The second linkage has a lost motion slot formed therein. An output control device is provided in the pump for controlling output from the pump and thus controlling the level of hydraulic fluid pressure admitted to the intensifier. A first control arm is coupled to the output control device and movable between a 'MAX' and 'MIN' position. An on-off nozzle actuator opens and closes the on-off nozzle valve remotely by way of the first linkage. A second control arm is coupled to the on-off nozzle valve actuator device and is movable between an 'ON' and an 'OFF' position. The first and second control arms are interconnected by the second linkage in such a way that the lost motion slot permits the first control arm to move from the 'MAX' to the 'MIN' position when the second control arm remains in the 'ON' position thereby suppressing pressure spikes.

Pressure spike suppressing apparatus

In the embodiment depicted, the catcher, for use with a liquid-jet-cutting equipment, comprises a housing in which is formed a chamber, and the chamber replaceably confines an impingement block. A channel opens into the chamber and onto the block for admitting and dissipating a stream of spent, cutting liquid, and for directing the liquid through a discharge port in the housing to a reservoir. The impingement block is replaceable in the housing by removing a threaded closure from an underlying housing wall.

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Wixom, MI, United States of America

Raymond M Jordan