Abstract: An automatic pump control device for an injection pump used to inject fluid (typically methanol) into oil or natural gas wells to prevent freezing. The device enables the pump to operate at rates as low as one full stroke per 1.5 minutes (i.e., 0.67 stroke/min), substantially slower than current rates of approximately fifteen strokes per minute. The device comprises a main body; an extension air pilot; a retraction air pilot; a toggle mechanism that actuates the extension air pilot to extend the pump piston, that at the end of the extension stroke actuates a retraction air pilot to retract the pump piston, and that automatically continues the two stroke cycle; a drive mechanism for driving the toggle mechanism; an overstroke mechanism to prevent over driving the retraction air pilot at the end of its stroke; an optional stroke speed adjustment valve; a circuit to circulate and transport a gas; and piston, spool, and sleeve for switching the path of the gas.

Abstract: Methods and devices for maintaining a minimum pressure of calibration gas, such as in an emission testing system or a similar arrangement, using a double latching valve (DLV). The DLV comprises a body having specific internal passages; a two-way normally closed (blocked) shut-off valve; an enlarged low pressure, sensitive air pilot acting upon the two-way valve; an adjustable sequencing latch valve integrated into the supply latch circuit; and a defined orifice incorporated into the supply latch circuit.

Abstract: Methods and devices for shutting off flow in fluid lines by an automated remote sensor signal, when leakage is detected, are disclosed. A shutoff valve has an inlet for connection to the upstream end of the pressurized fluid line, an outlet for connection to the downstream end of the pressurized fluid line, and a springless actuator for driving a valve between open and closed positions. A normally closed solenoid valve is connected between the upstream end of the pressurized fluid line and the springless actuator. A two-position fluid reset switch is also connected to the springless actuator. The shutoff valve further comprises a region of reduced pressure downstream of the actuator but prior to the outlet for connection to the downstream end of the pressurized fluid line. The region of reduced pressure is connected through the fluid reset switch to the springless actuator.

Abstract: A home carbonated beverage dispenser includes a transfer valve for conducting carbonated liquid from a carbonation reservoir to an outlet spout. A characterizing feature of the device and of the valve resides in the provision of complemental arcuate guide surfaces on the relatively movable surfaces of the valve which are brought into registry in the dispensing condition of the valve, whereby fluid flow through the valve is effected with a minimum of turbulence. A restrictor orifice is formed at the port, the orifice being defined by arcuate surfaces which mate with and provide a smooth continuation with elements of the movable valve components, thereby further to minimize turbulence and assure minimal loss of carbonation.

Abstract: An improved home dispenser of carbonated beverages is disclosed, together with a novel actuator valve mechanism. The valve mechanism may be shifted from the non-dispensing to the dispensing mode with minimum of applied force by reason of the interaction between sealing gaskets carried by the valve stem and complemental gasket enveloping skirts formed within the valve, the skirts being calculated to be radially outwardly deformed by pressure applied by the gaskets.

Abstract: The present invention is directed to a three way valve having particular utility as an air control valve and providing an enhanced duty cycle. A characterizing feature of the valve resides in the construction and arrangement whereby the valve plunger is, in all conditions of operation, slidably guided for precise axial movement in a bore whereby any tendency of the plunger to tilt or cant, with accompanying damage or scarring of internal elements of the valve structure, is positively prevented.