The Aro Corporation

Karl A Brandenberg

Wilbert G Kautz

An improved solenoid actuated, fluid control valve includes a diaphragm which is fluid actuated. Inlet pressure through a restricted orifice into a chamber on one side of the diaphragm acts against the diaphragm and causes closure of the valve, when the solenoid actuated valve in the passage from the chamber to exhaust is operated. When the solenoid or pilot operated exhaust is actuated, then the chamber is depressurized and the fluid flow valve opens.

Solenoid actuated fluid valve

A vibration and noise attenuating construction for impact air tools, such as a chipper, includes axially reciprocal working and balancing members which move toward and away from each other. The end of one member defines a cylinder and cylinder chamber which receives a piston defined in the end of the other member. Pressurized air is introduced into the cylinder chamber causing the chamber to expand and the members to be translated axially from each other against the force of compression springs. Translation of the piston beyond an exhaust passage in the cylinder wall permits the chamber to exhaust whereupon the compression springs will drive the members toward their original position. The members constantly cycle in this manner to provide vibration attenuation.

Vibration attenuation construction for an impact air tool

A sequential inhibitor (NOT) fluid logic device has a control input (a), a supply input (b), and an output (c). The output signal is terminated through output (c) from supply input (b) only when a control signal at control input (a) precedes a supply signal at supply input (b). The device includes a series of three plate members defining a connected cavity and chamber. An arrangement of valve seats in the cavity and chamber cooperate with a poppet and diaphragm. The area of the seats cooperative with the diaphragm and poppet insure the sequential operation of the device. An exhaust passage (d) may be actively integrated into a circuit utilizing the device to provide a combined OR fluid logic device and sequential inhibitor having an input (d), a supply input (b), a control input (a) and an output (c).

Sequential inhibitor (NOT) fluid logic device

Fluid logic elements are combined in various ways to provide staging, shift register and binary flip-flop functions. The elements used to provide the complex functions include a flip-flop element, sequential AND and sequential NOT elements in various combinations. For example, two sequential AND elements or two sequential NOT elements may be arranged with a single flip-flop element to provide a shift register or a binary flip-flop function. A single sequential AND element or a single sequential NOT element in combination with a single flip-flop element provide a staging function. Combinations of the multiple element devices provide enhanced control functions.

Multiple element fluid logic controls

An improved fitting for releasably connecting a plastic tube to a fluid logic element includes a ring member and a cooperating collet member. The collet member is generally cylindrical with a rigid collar at each end connected by an elastically deformable body section. A throughbore through the collet member includes barbs within the throughbore for gripping a plastic tube inserted in the throughbore. Outwardly extending projections from the middle of the body cooperate with cam surfaces of the ring member as the collet member is inserted into the ring member thereby controlling release of the plastic tube and insuring retention of the tube in the throughbore.

Connector for plastic tubing

A sequential AND fluid logic device has a first input (a) and a second input (b) with a single output (c). An output signal results whenever the input signals are provided sequentially to the first input (a) and the second input (b). The device includes a body member with a throughbore. An actuator is placed into the throughbore for cooperation with a first seat at one end of the throughbore. A diaphragm is arranged in opposed relation to the actuator and cooperates with the actuator. Another seat is cooperative with a poppet member at the opposite end of the throughbore. The area associated with the first seat is less than the active area associated with the diaphragm which, in turn, is less than the area associated with the other seat to assure sequential operation of the device.

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Chehalis, WA, United States of America

Karl A Brandenberg