Abstract: Systems and related methods pump fluid through a pump having a stroke volume. The systems and methods employ gravimetric control measures to monitor fluid flow through the pump. An actuator interacts with the pump during a stroke interval (TStroke) to pump fluid through the pump. The systems and methods couple a receptacle to the pump, to either dispense fluid into the pump or to receive fluid from the pump. The systems and methods detect changes in weight of the receptacle over a sample time period. The systems and methods achieve a desired flow rate (QDesired) by deriving an actual flow rate (QActual) by sensing changes in weight of the receptacle over the sample time period, taking into account the density of the fluid, and adjusting the stroke interval based upon QActual so that QDesired is achieved.

Abstract: A fluid processing assembly is used in association with a cassette that conveys fluid and a holder to hold the cassette. A door is carried by the holder for movement between an opened position to expose the holder and a closed position enclosing the cassette in the holder. The door carries an expandable gasket. The expandable gasket normally rests, when the door is in the closed position, in a relaxed state out of sealing contact with the held cassette. An actuator applies pressure to the expandable gasket to achieve, when the door is in the closed position, an expanded state in sealing contact against the held cassette. The assembly also includes a latch assembly on the door and holder, which makes engagement when the door is in the closed position. The engagement is unlocked when the gasket rests in the relaxed state. The engagement becomes locked when the gasket achieves the expanded state.

Abstract: Systems and related methods pump fluid through a pump. The pump comprises a pump chamber, which is responsive to applied pressures to convey fluid. The systems and methods place an electrode in the pump chamber which, in use, is coupled to a current source. The electrode generates an electrical field in the pump chamber that varies according volume of fluid in the pump chamber. The systems and methods register variations in the electrical field as fluid is conveyed through the pump chamber.

Abstract: Disclosed herein is a cylinder head comprising a one-piece casting including a cylinder block mounting surface adapted to mate with a mounting surface on a cylinder block and including vertically spaced first and second recesses adapted to respectively form portions of first and second combustion chambers and respectively including first and second exhaust ports, a bottom surface extending transversely to the cylinder block mounting surface and including an exhaust gas outlet, and an internal exhaust gas passage extending between the exhaust ports and the exhaust gas outlet.

Abstract: A motor cover seal for sealing opposed edges of upper and lower outboard motor convers includes an elongate body constructed and arranged for disposition between the opposed edges of the upper and lower covers, an attachment portion on the body configured to be secured to the lower motor cover, and a compressible portion on the body configured to be compressed by the closing of the upper motor cover against the lower motor cover.

Abstract: A molded lower motor cover for an outboard motor includes a first cover portion, a second cover portion, the second cover portion generally being a mirror image of the first cover portion, a laterally opening groove formation disposed generally horizontally relative to an inner face of an outer wall of each of the cover portions, each groove formation being integrally joined to the wall by a web configured so that its attachment to the inner face will not be visible on the external surface of the outer wall. When the first and second cover portions are fastened to each other, the groove formations sealingly accommodate an upper portion of the motor exhaust housing.

Abstract: A molded control panel for an outboard motor includes at least one motor control access opening, and is configured for attachment to the lower motor covers of the motor so that the lower covers may be removed without the removal or disassembly of the motor control systems.