A pump arrangement, in particular in a coating installation for the coating of components, such as a painting installation for the painting of motor vehicle body components, is provided. The pump arrangement includes a plurality of adjustable pumps for delivering a coating agent, e.g. for delivering a sealing agent for the sealing of weld seams on a motor vehicle body component. The pumps are connected in parallel such that the pumps extract the coating agent for delivery from a common inlet line and deliver said coating agent into a common outlet line. The arrangement further includes a control device for the open-loop or closed-loop control of one fluid variable at the outlet of the individual pumps, respectively, wherein the control device actuates the individual pumps individually, and/or a monitoring unit, which switches the pumps on and off non-simultaneously.

A technique for reducing harmonic vibration in a multiplex multi-pump system. The technique includes establishing a lower bound of system specific vibration-related information such as via pressure variation or other vibration indicator. Establishing the lower bound may be achieved through simulation with the system or through an initial sampling period of pump operation. During this time, random perturbations through a subset of the pumps may be utilized to disrupt timing or phase of the subset. Thus, system vibration may randomly increase or decrease upon each perturbation. Regardless, with a sufficient number of sampled perturbations, the lower bound may be established. Therefore, actual controlled system operations may proceed, again employing random perturbations until operation of the system close to the known lower bound is substantially attained.

[Problems] To provide a driving method for a metering pump, a driving apparatus for a metering pump, a vaporizer and an anesthesia apparatus which are capable of suppressing a pulsation in the metering pump, and lowering the costs and reducing the sizes of the vaporizer and the anesthesia apparatus.

[Means for solving the Problems] A metering pump 16 is joined to the stepping motor 15, includes an eccentric mechanism converting a revolving motion of the stepping motor 15 into a reciprocating motion of a plunger 16A, and makes a constant liquid delivery by sucking and discharging an anesthetic agent through variations in the cubic volume of a cylinder 16D caused by the reciprocating motion of the plunger 16A. The control section 12: calculates a suction and discharge cycle T of the metering pump 16 on the basis of a set anesthetic-gas concentration and a fresh-gas flow rate; sets a discharge period T2 of the cycle T to be longer than a suction period T1 of the cycle T; and controls the revolution speed of the stepping motor 15 so that the travelling speed of the plunger 16A is kept constant during the discharge period T2.

Power consumption of a cooling fan of an information processing device is reduced. A processor reduces a speed of the cooling fan provided in the information processing device, and controls the cooling fan at a first speed when there is no problem with the operation of the information processing device, the first speed being obtained by reducing the speed of the cooling fan. An interface transmits first information indicating the first speed to a management device. The processor receives second information indicating a second speed from the management device that associates the first speed with identification information identifying the information processing device and stores therein the first information indicating the first speed and the identification information, and controls the speed of the cooling fan according to the second speed when the second speed is lower than the first speed.

A peristaltic pump may include a rotor rotatably mounted on a base and an occlusion bed mounted on the base and moveable toward and away from the rotor. The peristaltic pump may also include a lid hingedly mounted to the base along a first hinge axis including a mounting bracket extending perpendicularly relative to the first hinge axis. A linkage assembly connecting the occlusion bed and the lid may include a pair of curved arms hingedly mounted to the mounting bracket along a second hinge axis parallel to the first hinge axis and a cam connecting the pair of curved arms and having a cam surface facing the mounting bracket, the cam being hingedly mounted to the occlusion bed at an end opposite the second hinge axis. The mounting bracket abuts the cam surface and form a cooperative connection between the lid and the occlusion bed via the linkage assembly.

A peristaltic pump may include a rotor rotatably mounted on a base and an occlusion bed mounted on the base and moveable toward and away from the rotor. The peristaltic pump may also include a lid hingedly mounted to the base along a first hinge axis including a mounting bracket extending perpendicularly relative to the first hinge axis. A linkage assembly connecting the occlusion bed and the lid may include a pair of curved arms hingedly mounted to the mounting bracket along a second hinge axis parallel to the first hinge axis and a cam connecting the pair of curved arms and having a cam surface facing the mounting bracket, the cam being hingedly mounted to the occlusion bed at an end opposite the second hinge axis. The mounting bracket abuts the cam surface and form a cooperative connection between the lid and the occlusion bed via the linkage assembly.

System and method for dispensing product to a washing machine. A chemical dispensing system includes a system controller, machine interface, and pump controller that communicate through serial data buses. The system controller provides a user interface, retrieves washing machine status information from the machine interface, and issues product dispensing commands to the pump controller. The pump controller monitors pump status and dispenses product in response to commands from the system controller. The pump controller: (1) determines pump activation periods based on calibration data stored in a pump controller memory; (2) tracks pump usage and adjusts the activation period to compensate for pump wear as the pump ages; (3) disables the pump if conditions exists that preclude operating the pump; (4) monitors product levels, and (5) reports pump status to the system controller. Integral channels are included in the pump housing to provide stress relief to a squeeze tube.

Example devices, systems, and methods disclosed herein relate to a controller configured to control pressure maintenance in a fire protection system. A controller may be configured to control a fire pump to provide a first level of water pressure and to control operation of a jockey pump that is coupled in parallel with the fire pump to provide a second level of water pressure that is less than the first level. The controller is further configured to receive, from a pressure sensor coupled to the fire protection system, an output representative of the water pressure. The controller is configured to provide instructions to initiate the jockey pump based on a pressure value associated with the output being below a first value, and to provide instructions to initiate the fire pump based on the pressure value being below a second value that is less than the first value.

A pump for the transfer a predetermined total volume of fluid from a pump inlet to a pump outlet in a unit of time is calibrated by deriving a count of the number of times a volume of the fluid is transferred from a pump inlet to a pump outlet in a unit of time; and adjusting the number of times the volume is transferred in a unit of time until the derived count is substantially equal to a predetermined threshold value.

A direct-injection, supercharged internal combustion engine having at least one cylinder, in which each cylinder is equipped with a direct injection apparatus, a fuel supply system comprising a high-pressure side and a low-pressure side, and a high-pressure piston pump comprising a piston displaceable in translational fashion between a bottom dead center and a top dead center of a pressure chamber of variable volume. The displaceable piston jointly delimits the pressure chamber with variable volume in such a way that a displacement of the piston causes a change in the volume of the pressure chamber via actuation of least one movable actuation element.