2results about How to "Increase fluid pressure" patented technology

An auto-occlusion safety device is provided for use in preventing rupture of infusion components during rapid infusion procedures. An occlusion valve is disclosed having a threshold pressure that is less than a rupture tolerance of the infusion system components. As the fluid pressure of the infusion system increases beyond the threshold pressure of the occlusion valve, the occlusion valve is automatically activated thereby occluding fluid flow upstream from a vulnerable infusion component. An accumulator is further disclosed for use in combination with the safety device to compensate for time delays in full activation of the occlusion valve.

This invention relates to a method for operating a vehicle seat valve, wherein the piston of the vehicle seat valve moves from a closed position to an open position or vice versa by applying voltage to a drive mechanism, particularly an electromagnetic drive mechanism. The power of the drive mechanism is adjusted via an effective voltage that can be varied by pulse width modulation of a pulse voltage having a constant frequency. To move the piston from its closed position toward its open position, the duty cycle of the pulse width modulation is first increased from a resting duty cycle, particularly 0%, to an initial duty cycle of less than 100%, particularly less than 50%, and then increased to a final duty cycle, particularly to 100%, after the piston reaches the open position and / or upon detection of an obstruction preventing the piston from moving before reaching its open position.