7069 results about "Crank" patented technology

A lancing device with automatic stick and lance return features is disclosed. A drive mechanism within the unit comprises a slider-crank linkage combination. It is biased by a spring member to cause automatic firing once a crank member advanced by a user causes movement of an internal linkage member beyond its fully-cocked position. After firing, the lance is withdrawn so as not to pose a threat of secondary injury to the user. In use, the device is substantially silent though its course of operation. Yet, its configuration lends itself to producing a very quick, virtually painless stick with minimal recoil or shock to the device.

The invention discloses a light five-cylinder plunger pump. The light five-cylinder plunger pump comprises a power end assembly and a hydraulic end assembly, wherein the power end assembly is connected with the hydraulic end assembly; the cylinder spacing of the light five-cylinder plunger pump is 9in; the power end assembly comprises a crank shaft, the crank shaft comprises six crank necks and five crank throws, the crank necks and the crank throws are fixedly connected, the distance between rotating centers of the crank necks and the crank throws is 101.6 mm, and the stroke distance of the light five-cylinder plunger pump is 203.2 mm. According to the light five-cylinder plunger pump, power is increased by increasing stroke, reducing transmission ratio and improving bearing capacity, andmeanwhile, dead weight is reduced by reducing the cylinder spacing, the tooth number of a big gear and the tooth thickness of the big gear and a pinion. The light five-cylinder plunger pump meets conditions of working in the area with severe well cementing operation conditions in aspects of weight and power simultaneously, and working efficiency is increased.

A folding bicycle comprises a frame including a front part whereon is mounted pivoting a steering rod having a lower end provided with a first wheel and an upper end provided with a handlebar, a rear part whereon is mounted a second wheel, and a central part whereon are mounted a saddle and a crankset connected to the rear wheel by transmission elements, such that the saddle, the crankset, the steering rod, the front wheel and the rear wheel are substantially contained in a common plane when the bicycle is unfolded. The frame includes elements articulating the front part and the rear part to the central part to reduce the bicycle wheelbase associated with elements for maintaining at least the front wheel and the rear wheel in the plane.

An exercising device includes left and right linking units each having a swing link pivotally mounted on a front support of a frame, a crank link coupling a crank arm to the swing link, and a pedal link connected to a lower end of the swing link, and left and right foot engaging pedals each mounted on a rear linkage end of the pedal link to be movable along an elliptical path with rotation of the crank arms. A sloping ramp member has an inclined surface to guide the foot engaging pedals to simulate stair climbing during the elliptical movement of the foot engaging pedals through left and right rollable anti-friction members mounted under the foot engaging pedals and rollably engaged with the inclined surface.

A transportation device (10) comprising crank arms (22) installed rotatably on a drive wheel (21), link levers (23) each having one end pin-connected to the tip of each of the crank arms (22), and swing parts (30) each having the other end pin-connected to each of the link levers (23) and held at a specified distance from a rotating shaft (210) of the drive wheel (21), wherein a speed changing cam roller (223) is installed on the crank arm (22) projectedly at a position apart from the rotating center thereof, and the transmission cam roller (223) is engaged for guiding with a transmission cam groove (44) formed eccentrically with respect to the rotating shaft (210) of the drive wheel (21), whereby the tips of the crank arms (22) are swung with in one rotation frequency of the drive wheel (21), and the angular velocities of the link levers and the swing part (30) connected thereto are increased or decreased periodically relative to the angular velocity of the drive wheel (21).

A self-contained reciprocation mechanism is coupleable within an enclosure of a percussive massage device and is configured to receive an applicator head for stimulating a user's muscles. The self-contained reciprocation mechanism includes a spatial positioning bracket, a semi-cylindrical bracket, a piston, a motor, a crank, and a reciprocation linkage. The spatial positioning bracket is configured to receive the other interconnected components of the self-contained reciprocation mechanism and position said components relative to each other at close predetermined tolerances to assure that the interconnected components are properly positioned to provide consistent operating characteristics. The self-contained reciprocation mechanism is coupled within the enclosure using screws which extend through mounting tabs of the spatial positioning bracket.

This invention relates to a method and apparatus for imitating sea wave by use of a drum-type centrifuge. The method is the following: to feed water into the drum type groove through the water input system of the centrifuge when it achieves stated centrifugal acceleration; to start the wave generator located in inside wall of the groove to generate moving wave; then to absorb wave through the wave breaker located on the other end of the inside wall. The said apparatus comprises drum-type centrifuge and wave generator and is characterized by the following: the wave generator is located inside the drum type groove with a external diameter of one to three meter, radial depth of twenty to fifty centimeter, axial width twenty to forth centimeter. The said wave generator comprises a crank swing mechanism made up of crank wheel, connecting bar and swing board and servomotor. The said wave breaker is located on side wall of the groove near to swing board with a baffle board in the middle.

The invention relates to the technical field of beam-pumping units, in particular to an intelligent oil pumping control method and an intelligent oil pumping unit. The intelligent oil pumping unit comprises a main motor, a speed reducer, a crank, a connecting rod, a walking beam, a balance lifting arm, a bracket, a horse head, a base, a brake device, a beam hanger, a load sensor, a strole process measurer, a safety limiting device and a digital control cabinet, has the characteristics of safety and reliability, realizes the intelligent optimization and adjustment of stroke times and balance of the oil pumping unit, fully exerts the well yield, improves the oil pumping unit well system efficiency, is in seamless joint with an oil field computer network system to realize the data remote transmission and the remote switch well control, simplifies the operation, is convenient and fast, saves the labor, saves the energy, reduces the emission, and improves the economic benefit.

An system is disclosed which incorporates a projectile delivery launcher which may assume numerous forms and perform numerous functions, including launching a water rescue preservation device such as a life jacket, military supplies, survival supplies, fire extinguishing supplies, or the like. The device includes a unique barrel having a low friction chrome plated inner surface which provides maximum range deployment of a safety projectile. A unique clutch-type crank mounted below the barrel and houses a thin stainless high strength steel ribbon to provide deployment of a projectile, and retrieval of a victim, supplies or the like. A C02 cartridge system, which incorporates a novel explosive chamber is also used. A method and apparatus of rescuing a victim or delivering supplies in emergency situations, or even establishing a line contact, is also disclosed.

A bicycle crank axle bearing assembly includes a pair of first and second axle support members, a pair of first and second bearings and a lock nut. The first and second axle support members include first and second mounting sections with first and second male screw parts that are configured and arranged to be non-rotatably coupled to a hanger part of a bicycle frame, and first and second bearing retaining sections in which the first and second bearings are retained to rotatably support a crank axle. The lock nut is disposed at least one of the first and second male screw parts of the first and second axle support members to retain an axial position of the at least one of the first and second support members with respect to the hanger part.

A bicycle includes an electrical auxiliary drive, including an electric motor, a battery for storing electrical energy, which battery is connected to the electric motor, a crank mechanism having pedal cranks, which are mounted on a pedal crankshaft disposed about a crank axis, so as to be able to rotate, and a planetary gear for driving the bicycle both by the electric motor and by the muscle power of a driver, the planetary gear and the electric motor being disposed about the pedal crankshaft of the crank mechanism.

An elongate member having a fixed end is passed through a plurality of grippers that impart tension in the elongate member and prevent the tension from being released. At least one gripper is movable while at least one other can be fixed. The movable gripper travels along the elongate member toward the fixed end then reverses direction, grips the elongate member, and carries the elongate member away from the fixed end, thereby creating tension in the elongate member. At least one gripper prevents the tension from being released. In some embodiments, the elongate member passes through a rotatable shaft with a lumen. The shaft can be in communication with a crank, whereby operation of the crank rotates the shaft.

A speed reducer and a yaw drive apparatus for a wind power generation apparatus, where the speed reducer has high efficiency and a short axial length, and suitable for the yaw drive apparatus. The speed reducer has three stages for speed reduction. The total reduction gear ratio of a first stage speed reducing portion (10) and a second stage speed reducing portion (20) is set at 1/6 to 1/60, and a third stage speed reducing portion (30) is constructed from an eccentric oscillating-type speed reducing mechanism having an internal-geared gear body (32), external gears (34), crankshafts (35), and a carrier (37). The reduction gear ratio of the eccentric oscillating-type speed reducing mechanism is set at 1/50 to 1/140, and the total reduction gear ratio of the speed reducer is set at 1/1000 to 1/3000. A yaw drive method and the yaw drive apparatus can reduce noise, and the yaw drive apparatus is inexpensive and reduced in size.

The invention discloses a testing table and a testing method for reciprocating-type piston rod sliding sealing performance testing. A motor of the testing table drives a crankshaft and connecting rod mechanism through a magnetic transmission coupler, and transforms into a straight line reciprocating motion through a slide bar and a guide sleeve of a guide mechanism. Two sets of sliding sealing devices are symmetrically arranged vertically. Gas flow meters are arranged on the outlets of a top cavity and a crankcase, and are connected on a monitor and a data collecting computer through interfaces. Lubricating devices of the sliding sealing devices are arranged inside corresponding positions of cylinders. The testing table and the testing method for reciprocating-type piston rod sliding sealing performance testing take Stirling engine sliding sealing devices as objects of study, can test gas sealing performance of the piston rod sliding sealing devices, test oil pumping abilities of the sliding sealing devices, and simultaneously realize comparisons of performance of the two sets of sliding sealing devices. The testing method is that if gas working mediums are filled from gas inlets or oil inlets, a state of a sealing performance test is formed; and if the gas working mediums are replaced by lubricating oils, a state of an oil pumping ability test is formed.