226 results about "Piston" patented technology

A valve, particularly a proportional pressure control valve for controlling fluid flows, includes a valve housing (10) having at least three fluid-conducting connections in the form of a pump connection (P), a use connection (A) and of a tank (T) connection. To connect the pump connection (T) to the use connection (A) and the use connection (A) to the tank connection (T), a control piston (18) can be guided in a longitudinally displaceable manner inside the valve housing (10). This control piston is provided for establishing a fluid-conducting connection between at least one of the connections (P) and a pilot chamber (20) of a pilot valve (22) having a connecting channel (24). A valve part (40) of the pilot valve (22) is guided in the pilot chamber (20) in a longitudinally displaceable manner. The connecting channel (24) has a throttle in the direction of the pilot chamber (20) of the pilot valve (22) with its valve part. A guiding device (38) oriented toward the pilot chamber (20) and provided for guiding the fluid flow is provided next to the throttle to divert the fluid flow, conveyed inside the connecting channel (24) and flowing toward the valve part (40), at least partially away from this valve part.

A hemostatic medical device comprising a tubular syringe body extending along an axis and having a front end and a rear end; a plunger axially slidable in the body; a stem projecting axially rearward out of the body from the plunger; a free piston slidable in the body forward of the plunger and subdividing the body forward of the plunger into a front compartment at the front body end and a rear compartment between the plunger and the piston; the syringe body being formed with a mechanism to allow the contents in the rear and front compartments to mix; sterile saline in the rear compartment; and a hemostatic substance in the front compartment.

The invention discloses a sesame air-drying and screening integrated device. The upper portion of a driving shaft is in rolling connection with the right side of a synchronous belt. The middle of a device body is fixedly connected with a partition plate, and a through groove is formed in the upper portion of the partition plate. The left side of the synchronous belt is in rolling connection with the lower portion of a driven shaft, the upper end of the driven shaft is in bearing rotational connection with the upper wall of a storage barrel, and the lower end of the driven shaft is fixedly connected with a rotating disc. The bottom of the storage barrel communicates with a discharging pipe, the upper end of the discharging pipe communicates with the storage barrel, the lower end of the discharging pipe is attached to the upper surface of the rotating disc, and a through pipe is arranged at the edge of the rotating disc. A screening plate is arranged on the lower portion of the rotatingdisc, and the left side of the screening plate is sleeved with a sleeving plate. According to the sesame air-drying and screening integrated device, the driving shaft and the synchronous belt rotate to drive the driven shaft to rotate, the driven shaft drives the rotating disc and the through pipe to rotate to communicate with the storage barrel in a reciprocating mode, and thus the intermittent material falling function is achieved; and a cam drives the screening plate to move leftwards and rightwards in a reciprocating mode under the action of the sleeving plate and a spring so as to screensesame, a piston plate moving leftwards and rightwards in a reciprocating mode enables air to be sucked into an air blowing cylinder continuously through an air inlet pipe and discharged from an air spraying head, and thus the sesame falling from the screening plate is blown and dried.

A tensioning device for stretching a threaded bolt by applying tension to the threaded portion of the threaded bolt has a base and a support tube surrounding the threaded bolt and supported on the base. A cylinder housing is arranged as an axial extension on the support tube. A piston is moveably arranged in the cylinder housing and delimits together with an inner wall of the cylinder housing a hydraulic operating chamber. An interchangeable bush is rotatable relative to the piston and can be entrained axially by the piston. The interchangeable bush has an internal thread to establish a screw connection to the threaded portion. A device for path and / or position detection with first and second interacting elements is provided. The first element is fastened to the at least one piston and faces the cylinder housing. The second element is fastened to the cylinder housing and faces the piston.

A hybrid electric / piston driven motor may use a low voltage, high torque direct current (DC) motor to drive a vehicle, such as a motorcycle. The DC motor may be powered by a battery that may be charged by an alternator / DC generator. The alternator / DC generator may be driven by the movement of the vehicle. The motor may include springs that receive the kinetic energy of the pistons of the motor as the pistons rise in their upstroke. The springs may convert this upstroke kinetic energy to downstroke kinetic energy, minimizing the power needed from the battery.

An adjustable bent drilling tool capable of changing in situ drilling direction to facilitate horizontal drilling. The drilling tool may be controlled from the surface and eliminates the need to bring the tool to the surface for reconfiguration. In one embodiment, the drilling tool utilizes a communications module to communicate with upstream sections of the tool. The communications module is connected to a programmable electronic control module which controls an electric motor. A hydraulic valve assembly follows the control module, which receives input signals and controls a pilot piston between two fixed points of a mid-assembly typically located adjacent to and downstream of the hydraulic valve assembly on the drill tool. A lower assembly is attached to the drill tool immediately following the mid-assembly, and provides both a safety release sub-assembly as well as a bendable sub-assembly which directs the adjustable drill tool to change drilling angle and direction.

The invention relates to a lower mold positioning and locking device for a fire-resistant brick forming hydraulic machine mold. The structural points of the device are as follows: the positioning and locking device comprises T-shaped bars 14 which protrude convexly on a lower mold base 9 and extend along the end direction; ascending and descending rolling ways 91 which can be driven upwards and downwards are positioned at the tops of the T-shaped bars 14; T-shaped slots 13 are arranged at the corresponding parts at the bottoms of a lower mold 22 and connected with sliding sleeves of the T-shaped bars 14; and the bottoms of the T-shaped bars are connected with pistons of an oil cylinder 15. The positioning and locking device has the advantages that the positioning is complete, reasonable and fast, the installation and the operation are easy, and the automatic degree is high.

The invention discloses a water-saving potato high-efficiency washing device. The water-saving potato high-efficiency washing device comprises a bracket, a washing bucket, a rotating motor, a cylinderbody, a water tank and a washing roller, wherein the washing bucket is fixedly connected with the bracket; the washing roller is arranged in the washing bucket; a threaded sleeve penetrates through the upper end of the cylinder body and is rotatably connected with the cylinder body; the lower end of a threaded rod is fixedly connected with a piston; a pushing rod is fixedly mounted at the lower end of the piston; the lower end of the pushing rod is hinged to a sleeve; a propping and pressing rod penetrates through the bottom of the washing bucket and is rotatably connected with a disk; and moving rods are fixedly mounted on the disk, and penetrate through the lower end of the side wall of the washing roller to extend to a cavity of the side wall. According to the water-saving potato high-efficiency washing device disclosed by the invention, intermittent water supply is performed through pumping of clean water by the arranged cylinder body to wash potatoes, so that the washing effect is good, and water resources are saved; and the potatoes are washed through the rotating of the arranged washing roller, and brushes on the washing roller can also perform washing in an up-and-down brushing manner, so that the multi-direction washing is realized, and the water-saving potato high-efficiency washing device is high in washing efficiency, high in practicality and high in automation degree.

The invention discloses a double-tube double-channel syringe and a needle head, including a needle tube, a needle head is arranged at the front end of the needle tube, a first partition is arranged inside the needle tube along the length direction, and the needle tube is divided into a first cavity and a first cavity by the first partition. In the second cavity, the first cavity is provided with a first piston, the first piston is provided with a first piston handle, the second cavity is provided with a second piston, and the second piston is connected with a second piston handle. The two piston handles are arranged outside the second cavity; along the length direction, the needle is divided into a third cavity and a fourth cavity through the second partition, and the third cavity communicates with the first cavity; the fourth cavity communicate with the second cavity. In the present invention, the separation of the first cavity and the second cavity but the design of the needle entering the same blood vessel realizes the relatively independent injection of hyaluronic acid and blood withdrawal, which effectively avoids the most serious complication of hyaluronic acid injection, vascular embolism, and can be performed effectively and safely. Hyaluronic acid injections allow doctors and patients to perform injections with greater confidence.