A compressor pump structure comprises a rotating shaft, a piston, a cylinder, a cylinder sleeve, a lower flange and an upper flange, the central axis of the rotating shaft being arranged eccentrically with respect to the central axis of the cylinder, the rotating shaft being slidably arranged in the piston, the piston being movably arranged in the cylinder and forming two volume-variable chambers with the cylinder, the piston comprising two first sliding planes arranged opposite one another and two first contacting planes arranged opposite one another, the first contacting plane on the upper side being in sealing contact with the upper flange, and the first contacting plane on the lower side being in sealing contact with the lower flange. Also disclosed is a compressor with the compressor pump structure.

A rotary pump for a fluid metering system is provided. The rotary pump reciprocates, and is reversed by a signal from a limit switch that is deflected by an actuator arm on a rotating sleeve of the pump system.

A hydraulic system is provided for powering one or more external hydraulically powered devices. The system includes one or more pumping systems attached to a common crankshaft and including an inner sleeve, an outer sleeve, a valve member and an end body. The system can include a pair of high pressure fluid tanks and a low pressure fluid tank. The pumping systems can increase the fluid pressure within the high pressure fluid tanks back and forth and in a sequenced manner, and force the higher pressure fluid through the one or more powered devices. Drive systems are provided to assist the pumping systems in rotating the common crankshaft. The drive systems can include a piston assembly for rotating the crankshaft and a valving system for directing fluid into the piston assembly to power the piston assembly.

A two-component pumping system includes a first pump for pumping a first component, a second pump for pumping a second component, a motor, and a yoke assembly for connecting the motor to the first pump and the second pump and driving them simultaneously. The first pump includes a first displacement rod that reciprocates in a first pump axis. The second pump includes a second displacement rod that reciprocates in a second pump axis parallel to the first pump axis. The motor includes a drive shaft configured to reciprocate in a drive axis that is parallel to and in a common plane with the first and second pump axes. The motor is also configured to drive the first and second displacement rods in unison. The yoke assembly includes a top connector and a shoe. The top connector connects to the drive shaft.

A fluid machinery, a heat exchange equipment, and an operating method for the fluid machinery. The fluid machinery includes: an upper flange (50); a lower flange (60); a cylinder (20); a rotating shaft (10), the axis of the rotating shaft (10) being eccentric to the axis of the cylinder (20) and at a fixed eccentric distance; and a piston component (30), the piston component (30) being provided with a variable volume cavity (31). Because the eccentric distance between the rotating shaft (10) and the cylinder (20) is fixed, the rotating shaft (10) and the cylinder (20) rotate around the respective axes thereof during motion, and the position of the center of mass remains unchanged, so that the piston component is allowed to rotate stably and continuously when moving within the cylinder (20); and vibration of the fluid machinery is effectively mitigated.

Apparatus that prevent side load in hydraulic override pumps are disclosed herein. An example apparatus includes a lever rotatably mounted to a support, a pump cylinder rotatable about a first end of the pump cylinder, and a pump rod operatively coupled to the lever to move within the pump cylinder based on rotation of the lever, wherein the pump cylinder rotates when the pump rod moves within the pump cylinder.

According to the embodiment of the present disclosure, it provides a method of manufacturing a piston of a pump for brake system, the piston fabricated using a piercing process by press forming to have an inlet path communicating with a suction port through which oil is introduced.

A rotary pump for a fluid metering system is provided. The rotary pump reciprocates, and is reversed by a signal from a limit switch that is deflected by an actuator arm on a rotating sleeve of the pump system.

An inflating device includes a main body, an outer cylinder, an inner cylinder, a handle, an inflating tube and a switching structure. The outer cylinder is disposed within the main body and an upper portion of the outer cylinder defines a cavity which has a bottom surface defining a sliding passage. The inner cylinder is disposed within the outer cylinder. The switching structure includes a slide unit and a press cover. The slide unit is disposed slidably in left and right directions within a sliding passage. The press cover is mounted on the upper portion of the outer cylinder so as to cover the cavity and the slide unit. The inflating device can be conveniently switched between a small pump unit and a large pump unit by the switching structure.

A device is described for supplying and metering a fluid for medical purposes, at least comprising one pump for pumping the fluid and at least one element through which the fluid is conveyed. At least one recess is provided in the at least one element, which is tightly covered by a sensor component composed of a pressure sensitive material, wherein a material of the at least one element is harder than that of the sensor component. The device also has a force sensor with which pressure-induced changes of the sensor component in a region of the at least one recess can be measured.