Graco Minnesota Inc.

Other

David M Behrens

Christopher M Lange

Jason J Willoughby

Vu K Nguyen

Mark T Weinberger

Wade Daniel Palashewski

Mark L Bauck

Timothy Sean Roman

A positive displacement pump includes a housing surrounding a drive chamber and a diaphragm compartment. A drive element is inside the drive chamber. A diaphragm is inside the diaphragm compartment and divides the diaphragm compartment into a fluid chamber and a cavity. A shaft connects the drive element and the diaphragm. A breather valve is fluidically connected to the cavity and is configured to allow air to exit the cavity. The cavity is fluidically disconnected from the drive chamber.

Breather valve

Reduced pressurization shift within diaphragm pump cavity

An intravenous tube holding assembly for organizing and protecting a plurality of intravenous tubes includes a tensioner is removably coupled to an intravenous tube pole. The tensioner is biased in a first direction and the tensioner is urgeable in a second direction. A retainer is provided that has a plurality of engaging slots therein. Each of the engaging slots engages a respective one of a plurality of intravenous tubes for organizing the intravenous tubes. A fastener is provided and the fastener is coupled to the retainer. The fastener releasably engages the tensioner such that the tensioner accommodates a weight of the intravenous tubes in the retainer. Moreover, the tensioner is urged in the second direction when the intravenous tubes are tugged upon.

Intravenous tube holding assembly

A check valve assembly includes a housing extending axially along a center axis of the check valve assembly from a first end to a second end. The housing can include an opening disposed at the first end and an outlet disposed at the second end. A seat is disposed in the opening and connected to the tubular housing. The seat includes an inlet extending axially through the seat. A ball is disposed inside the tubular housing and disposed axially between the seat and the outlet. The ball is larger in diameter than the inlet. A ball guide is disposed inside the tubular housing and is disposed axially between the ball and the outlet. A spring is disposed inside the tubular housing and disposed axially between the ball guide and the outlet. The spring is compressed between the ball guide and the outlet.

Cartridge style ball check for positive displacement pump

An air operated pumpuses a magnetmounted in the valve cupof the air motorand two reed sensorsmounted in the valve coverto monitor the speed and position of the valve. A solenoidis mounted on the valve coverand can be commanded to extend a plungerinto the valve cupto stop valve movement and therefore the pump from running away A magnetoresistive sensoris located in the center of the air motorto precisely monitor the pistonposition and with air valve sensorsprovides the input necessary for precise control and diagnostics of the pumpand makes it suitable for metering and plural component application.

Reciprocating pump with electronically monitored air valve and piston

An air operated pump () uses a magnet () mounted in the valve cup () of the air motor () and two reed sensors () mounted in the valve cover () to monitor the speed and position of the valve (). A solenoid () is mounted on the valve cover () and can be commanded to extend a plunger () into the valve cup () to stop valve movement and therefore the pump from running away. Three methods may be used to increase battery life and monitor the solenoid plunger position, two of which use the changing inductance of the solenoid () to monitor the solenoid movement.

Growing community of inventors

Hopkins, MN, United States of America

David M Behrens