475 results about "Pneumatics" patented technology

An ophthalmic endoprobe including a hand-piece and a cannula assembly having a longitudinal axis is provided. The cannula assembly including an inner tube concentric with an outer tube; wherein the hand-piece may further include a motor powered by a pneumatic energy source, the motor providing motion to a transmission shaft; and a transmission system to couple the shaft motion to the cannula assembly; wherein the transmission system provides a counter-rotating motion to the inner tube and the outer tube about the longitudinal axis of the cannula. A fluid console for use in endoscopic ophthalmic microsurgery including a pneumatics module to obtain a pneumatic force from an external source and provide an adjustable pneumatic force; a scanning module coupled to the pneumatics module; and an endoprobe coupled to the scanning module is also provided.

A power generation and/or storage device utilizes human motion inputs or other power sources (i.e. hydraulics, pneumatics or explosive gases) to create mechanical kinetic energy that is stored (preferably in springs) and later released on demand to rotate a generator to produce electricity.

The present invention advantageously provides a system for automatically delivering oxygen to a patient, including a sensor to measure an amount of oxygen in a bloodstream of a patient, a pneumatics subsystem and a control subsystem. The pneumatics subsystem includes an oxygen inlet, an air inlet, a gas mixture outlet, and a gas delivery mechanism to blend the oxygen and air to form a gas mixture having a delivered oxygen concentration, and to deliver the gas mixture to the patient. The control subsystem includes an input device to receive a desired concentration of oxygen in the bloodstream of the patient, a sensor interface to receive measurement data and status information associated with the measurement data from the sensor, a pneumatics subsystem interface to send commands to, and receive data from, the pneumatics subsystem, and a processor to control the delivered oxygen concentration based on the desired oxygen concentration, the measurement data and the status information.

The present invention relates generally to crossbow bowstring drawing mechanisms, also called cocking mechanisms in the art. More particularly, the present invention relates to a crossbow bowstring drawing mechanism that is integrated into a crossbow. The mechanism primarily consists of a pneumatically actuated piston and cylinder assembly, a compressed gas dispenser, and a string pick up arm. An after-the-fact bolt-on kit is also intended to be within the scope of this application allowing retrofit to existing bows not currently outfitted with this cocking feature. The bowstring cocking mechanism may utilize an internal power source such as compressed carbon dioxide (CO₂) cartridge, or a plurality of cartridges to actuate the pneumatics that are part of the cocking mechanism on demand. Such actuation draws a bowstring from the un-cocked position to the cocked position. Likewise, such actuation will equally allow a controlled dry-fire, allowing the bowstring to be released from the cocked position to the un-cocked position; the pneumatics acting as a system damper, preventing damage to the bow limbs.

Described herein are multi-leaf collimators that comprise leaf drive mechanisms. The leaf drive mechanisms can be used in binary multi-leaf collimators used in emission-guided radiation therapy. One variation of a multi-leaf collimator comprises a pneumatics-based leaf drive mechanism. Another variation of a multi-leaf collimator comprises a spring-based leaf drive mechanism having a spring resonator.

A medical device for reducing the force necessary to penetrate living being tissue using a variety of reciprocating motion actuators, including piezoelectric, voice coil, solenoids, pneumatics or fluidics. The reciprocating actuator drives a penetrating member, such as a needle, through the tissue at a reduced force while the device detects the passage of the penetrating member through the tissue. Upon passage of the penetrating member through the tissue, electrical power to the reciprocating actuator is automatically terminated. One exemplary method for detecting this passage is via a fluid-containing syringe that is coupled to a channel within the penetrating member.; Once the penetrating member tip has passed through the living tissue, the fluid within the syringe no longer experiences any pressure and a plunger within the syringe displaces indicating passage of the penetrating member tip. This motion can provide direct tactile feedback to an operator of the medical device or can automatically open a switch providing electrical power to the medical device. Alternatively, a pressure transducer can also monitor the pressure within the penetrating member channel and automatically activate the switch to cut off the electrical power.

The invention discloses a novel hydro-pneumatic spring. An upper semispherical chamber is arranged in an inner cavity of an upper hoisting ring fixing device, a rubber hydro-pneumatic diaphragm is arranged at the upper opening of a working cylinder, a sealed high-pressure air chamber inflated with high-pressure air is formed by the upper semispherical chamber and the rubber hydro-pneumatic diaphragm, a closed rodless cavity is defined by the rubber hydro-pneumatic diaphragm, the inner wall of the working cylinder and a piston located under the rubber hydro-pneumatic diaphragm, an annular cavity is defined by the piston, the outer wall of a piston rod, the inner wall of the working cylinder and the lower wall, an air bag and a damping valve are arranged in an inner cavity of the piston rod, four second trapezoid through holes evenly distributed in the radial direction are formed in the lateral wall of the damping valve, and four first trapezoid through holes which are evenly distributed in the radial direction and are in the same radial positions as the four second trapezoid through holes are formed in the lateral wall of the piston rod. Pressure difference is generated between the pressure of the air in the air bag and the pressure of liquid in the annular cavity, the air bag is pressed or expands, continuous variation of the area of a throttling hole is achieved, the smoothness of a car can be improved, and the service life of the hydro-pneumatic spring is prolonged.

The Mechanical Rotor is a simple unique invention that salvages torque energy from excess linear kinetic energy produced by flowing rivers, streams, ocean currents, or blowing wind. The unique design of the invention salvages torque by the drag principal of Physics during part of a rotation. Rotation completion limits exposure to only a small aerodynamic surface into the pressure of the linear kinetic force.

The invention can be elongated, stacked, or clustered, and scalable, to accommodate any engineering design desired for using the salvaged torque to pump liquids, compress pneumatics, or generate electricity or any other useful purposes.

The invention relates to a pneumatic-muscled bionic joint based on a universal-joint parallel mechanism. The pneumatic-muscled bionic joint mainly structurally comprises a support rod, a fixed end platform, connecting shafts, deep groove ball bearings, pneumatic muscles, universal joints, a front arm platform, internal circlips, and round nuts. When the pneumatic-muscled bionic joint operates, rubber tubes are inflated and expanded by inflating the pneumatic muscles and act on a woven net; weaving angle of lines of the woven net increases, the pneumatic muscles are driven to axially contract; the front arm platform can rotate at three rotational degrees of freedom by inflating one, two or three pneumatic muscles respectively. The pneumatic-muscled bionic joint is simpler in structure, light in weight, good in flexibility and low in cost; space for movement poses is large, the movement range is more approximate to that of human arms, compliance of a mechanism is enhanced accordingly, and pose adjustment range is enlarged. By the use of the pneumatic-muscled bionic joint in the field of medical rehabilitation, functional rehabilitation can be improved for old people or people with upper arms disabled.

The invention relates to a high-accuracy hydraulic scraper pan assembly tooling, comprising a tooling base, a pan baseboard tire mould, a pair of beams moving towards each other along the base, a first jacking cylinder, a second jacking cylinder, a first hydraulic cylinder, a pan bottom guard board turnover support, an ear plate group positioning and clamping device and a lateral knife board jacking mechanism, wherein when the scraper pan is buckled on the pan baseboard tire mould, the pan bottom guard board turnover support turns over and then positions an ear plate group through the ear plate group positioning and clamping device; and the first jacking cylinder, the second jacking cylinder, the first hydraulic cylinder and the lateral knife board jacking mechanism simultaneously jack a bottom guard board, a master knife board, a pall wall board and a lateral knife board of the scrapper pan. In the invention, a fixture combining hydraulic pressure and pneumatics is used to clamp and position a scraper pan assembly, thereby ensuring high accuracy and stable and reliable quality of the scraper pan assembly, preferably improving the welding quality of products, and completely meeting the welding requirements of robot weld joints. Meanwhile, the labor intensity of workers is low, and the assembly efficiency is high.

The invention provides a cylinder with a low friction characteristic by piezoelectricity induced piston vibration, belonging to the technical field of pneumatics and in particular belonging to the technical field of reducing friction coefficients of cylinders. The friction coefficient of the cylinder can be reduced conveniently, quickly and flexibly. The cylinder is characterized in that a plurality of piezoelectric telescopic pieces are uniformly arranged around the periphery on one plane of a piston of a cylinder assembly, and one plane of each piezoelectric telescopic piece is connected with the corresponding plane; a plurality of piezoelectric telescopic pieces are uniformly arranged around the periphery on the other plane of the piston of the cylinder assembly, and one plane of each piezoelectric telescopic piece is connected with the corresponding plane; the telescoping directions of the piezoelectric telescopic pieces on the two planes of the piston of the cylinder assembly and the diameter of the piston of the cylinder assembly are parallel or perpendicular or form included angles alpha; and all the piezoelectric telescopic pieces are driven by alternating current. When the piezoelectric telescopic pieces input driving signals, the coefficient of friction between the piston and a cylinder barrel can be reduced.

The invention discloses a drill machine used for drilling gas-oil well hard rock or others, in particular to a strong pumping device used for a pneumatic through down-hole hammer-hole bottom. The device mainly adopts an annular groove arranged on an inner wall of a lower part of a lower adapter. And a radial hole communicated with a bottom nozzle hole is arranged on a lower section of an anti-circulation bore. A bore spline groove and a spline are arranged in the middle of the anti-circulation bore. More than one normal-open inner nozzle holes are arranged at the bottom of the spline groove, and spare inner nozzle holes are arranged on the spline. The normal-open inner nozzle hole and the spare inner nozzle holes are respectively communicated with a central through-hole. When in a normal drilling process, the radial hole is communicated with the annular groove of the lower part of the lower adapter. When the drilling tool is lifted, the anti-circulation bore slides downwards, and the air flow cannot be blown to an under-hole stratum through the bottom nozzle hole as the radial hole is closed by the inner wall of the lower part of the lower adapter. The invention changes the existing through down-hole hammer-hole slag-draining mode and solves the problem that a part of air containing rock granules and powders overflows from outer annular clearances of the bore to lead to the loss of reduction, clamp drill and partial core samples.

A micro-nanometer precision servo pneumatic X-Y positioning table comprises by two slide air cylinders and drives the two slide air cylinders by the servo control rule to make the pneumatic table to get the purpose of X-Y two degrees of freedom precision positioning. However, the pneumatic servo system is a high time-variant and nonlinear system and the nonlinear friction force; causes the stick-slip phenomenon of the servo pneumatic system. Therefore the. micro-nanometer precision servo pneumatic X-Y positioning table in accordance with the present invention has a new velocity feedback compensation method to overcome the nonlinear friction force and the stick-slip phenomenon. The new method is to add a velocity compensation signal, which periodic frequency is larger than the system's natural frequency into the control signals. The method is to put the velocity compensation signal directly into the servo valve control signals. By this method; it is able to avoid the complex control rules and the calculation of the feedback compensation and to get higher precision positioning. The positioning precision of the micro-nanometer servo pneumatic X-Y positioning table is about the resolution of the linear scale (ex. in this case 20 nanometer, is the resolution of the used optical linear scale; if the resolution is 10 nanometer the precision can be also 10 nanometer) not only for long stroke but also for micro-step command.

The structure of pneumatic aided fitness equipment includes a combined piston base at the piston made by the protruding tube of the second handle, which includes a protruding column and a piston, and the protruding column can be inserted and secured into to the protruding tube of the second handle. The piston can be slid inside the horizontal tube of the first handle. A limiting clamping ring includes a clamping part and a retracting hole, the limit clamping ring being positioned at an end opening of a horizontal tube of the first handle. The retracting hole is used for said protruding tube of the second handle, and a round edge is formed around the retracting hole to block the piston of the combined piston base. By so doing, the position of the piston of the second handle is more secure, durable and practical.

Improvements in A wind generator, that may also be called and relates to, windmill, turbine or aero generator, on a vertical axis. The vertical axis gives the windmill the ability to be turned by air, or liquid if inverted, from any direction parallel to the earth's surface. Multiple blades rotate through a horizontal axis into the wind to lessen air resistance on one side while turning vertically on the other side to gain energy from the wind. The system is counter-weighted as needed, to reduce energy loss, by different methods including but not limited to gears, levers, pneumatics, cables, hydraulics or added counter-weight. The electrical generating machinery is below the blades or at the bottom of the vertical drive shaft.