A medical fluid delivery cassette configured for use with a medical fluid pumping system and related systems and methods. The medical fluid delivery cassette includes a base and a membrane that together define a fluid pump chamber. The medical fluid delivery cassette further includes a member configured to apply an outward force to an inner surface of the membrane.

Medical fluid cassettes and related systems and methods

This disclosure relates to medical fluid cassettes and related systems and methods. In some aspects, a medical fluid cassette includes a base and a magnetically attractive member overlying a fluid pump chamber of the cassette. The magnetically attractive member defines a cavity sized and shaped to receive a portion of a piston.

This disclosure relates to medical fluid pumping systems and related devices and methods. In some aspects, a medical fluid pumping system includes a medical fluid pumping machine including a piston head that can be linearly displaced and a medical fluid cassette that can be secured to the medical fluid pumping machine. The medical fluid cassette includes a fastening member attached to a region of a flexible membrane overlying a fluid pump chamber, and the piston head is configured to be mechanically connected to the fastening member of the cassette.

Medical fluid pumping systems and related devices and methods

The present invention relates to a control system for hermetic cooling compressor, which includes a reciprocating compressor (3) and an electronic control (2) for the reciprocating compressor (3), the electronic control (2) being configured for, after commanding the turning off of the reciprocating compressor (3), detecting whether the turn velocity (23) of the turning axle (10) is below a predefined velocity level, and then applying a braking torque (36) that causes deceleration of the turning axle (10) before completing the next turn of the turning axle (10), in case the turn velocity (23) detected is below the velocity level (34).

Control system and method for reciprocating compressors

A hydraulic control device for a forklift includes: a plurality of hydraulic mechanisms including a lifting/lowering hydraulic cylinder and a tilting hydraulic cylinder; a hydraulic pump; an electric motor; a discharge control mechanism; a proportional valve; a flow rate control valve; and a controller. When the lifting/lowering hydraulic cylinder performs a lowering operation of the fork and a hydraulic mechanism other than the lifting/lowering hydraulic cylinder simultaneously performs a further operation, the controller controls an open degree of the proportional valve in accordance with a rotation speed difference of a required lowering operation rotation speed for the hydraulic pump, which is required to perform the lowering operation at an instructed speed that is in accordance with an operation amount of the lifting/lowering control member, and a required further operation rotation speed for the hydraulic pump, which is required to perform the further operation.

Hydraulic control device for forklift

A fluid device system (12) includes a fluid pump (22), an electric motor (24) in engagement with the fluid pump, and a controller (20). The electric motor is adapted for rotation in response to an electric signal. The controller is adapted to communicate the electric signal to the electric motor. The controller includes a lookup table (120) having a plurality of performance data related to the fluid pump and the electric motor. The performance data from the lookup table is used by the controller to set aspects of the electrical signal communicated to the electric motor in order to achieve a desired attribute of the fluid pump.

Electronic control for a rotary fluid device

Example fluid circuits (e.g., within aircrafts) include first (12) and second (32) pump assemblies. The first pump assembly has an electric motor (18) and a first fluid pump (16). The first fluid pump is coupled to the electric motor and has a case drain port (30) that is in fluid communication with a case drain region of the first fluid pump. The second pump assembly is powered by hydraulic pressure from the first fluid outlet (22) of the first fluid pump and functions to augment flow through the case drain region of the first fluid pump.

Case flow augmenting arrangement for cooling variable speed electric motor-pumps

A bleed valve assembly (20) includes a control assembly (22) having a fluid inlet (36a) and a fluid outlet (36b). The control assembly defines a fluid passageway (38) in fluid communication with the fluid inlet and the fluid outlet. An electromechanical valve (28) is engaged with the control assembly. The electromechanical valve provides selective fluid communication between the passageway and the fluid outlet. A fluid sensor (24) is in fluid communication with the passageway. The fluid sensor includes a sensing tip and is in electrical communication with the electromechanical valve. A valve (26) is disposed in the passageway of the control assembly. The valve prevents fluid communication of non-gaseous fluid between the fluid inlet and the fluid outlet.

Fault-tolerant bleed valve assembly

A fluid device includes a housing defining a fluid inlet and a fluid outlet. A variable displacement assembly is in fluid communication with the fluid inlet and the fluid outlet. The variable displacement assembly includes a rotor assembly, a flexible ring, and a plurality of ring supports. The rotor assembly includes a rotor having a plurality of reciprocating members. The flexible ring is disposed about the rotor assembly. The flexible ring includes an inner surface, which is adapted for engagement with the plurality of reciprocating members, and an outer surface. The plurality of ring supports is disposed about the flexible ring. Each of the plurality of ring supports includes a support portion and a pivot portion about which the ring support selectively pivots. The support portion is adapted for engagement with the outer surface of the flexible ring.

Fluid device with flexible ring

A fluid device system includes a rotary fluid device (18). The rotary fluid device (18) includes a housing (28) having a main body (34) with a first end portion (36) and an opposite second end portion (38). The first end portion defines a first chamber (44) and the second end portion defines a second chamber (48). A fixed displacement pumping assembly (56) is disposed in the first chamber of the first end portion. An electric motor (24) is disposed in the second chamber of the second end portion. The electric motor includes a shaft (26) that is coupled to the pumping assembly. The fluid device system further includes a plurality of sensors (102) that is adapted to sense operating parameters of the rotary fluid device and a controller. The controller (20) is in electrical communication with the electric motor of the rotary fluid device and the plurality of sensors. The controller includes a microprocessor (116) and a storage media (118). The storage media is in communication with the microprocessor and includes at least one lookup table (120) that includes performance characteristics of the rotary fluid device. The lookup table is used by the controller to achieve a desired attribute of the rotary fluid device.

Phillip Wayne Galloway

Papers

Electronic control for a rotary fluid device

Case flow augmenting arrangement for cooling variable speed electric motor-pumps

Fault-tolerant bleed valve assembly

Fluid device with flexible ring

Electronic controller for rotary fluid device