96 results about "Scotch yoke" patented technology

An electric toothbrush wherein the number of revolution of a motor shaft is in match with the frequency of reciprocating motion of the brush. A motor (2) housed in a tubular case (1) is coupled to a reciprocating shaft (5) slidably extending through the forward end of the case by a scotch yoke mechanism (40) for converting one turn of rotation of the motor shaft (21) into one stroke of reciprocating pivotal movement of a pivotal body (4), and by motion conversion means (3) for converting one stroke of reciprocating movement of the pivotal body (4) into one stroke of linear reciprocating motion of the reciprocating shaft (5).

A power tool includes a housing, a motor supported by the housing and having an output shaft, a planetary transmission coupled to the output shaft and having an output carrier, a dual-eccentric scotch yoke mechanism coupled to the output carrier and drivable by the planetary transmission in response to rotation of the output shaft, and a blade coupled to the dual-eccentric scotch yoke mechanism for movement in a reciprocating manner.

A reciprocating compressor provided with a plurality of gas compression means having a cylinder and a piston, the piston of each gas compression means is cooperated with the, compressor by converting a rotating motion of a crankshaft provided on an electric drive source to a reciprocating motion by a scotch yoke mechanism, wherein an increase of the volume of discharged gas can be achieved without designing a gas compression means to be wide or without increasing the number thereof, a pulsation of discharged gas can be decreased by an attachment of an expression muffler on the cylinder head so as to decrease a vibration and noise of the compressor, an attachment of the fly wheel to the crankshaft and an adjustment of the shaft with the crankshaft can be improved easily, further compressed gas flows are joined and discharged in concentration, thereby the pulsation of discharged gas can be restrained.

A motor comprising a least one piston slideable within a cylinder with a seal, a plurality of valves, means to determine the position of the valves and a head of the piston, means to select the ports in which to transfer energized fluid/exhaust in and out of the cylinder, and a scotch yoke. The cylinder comprising at least a first set of ports and a second set of ports. The ports disposed in a wall of the cylinder. The valves coupled and slideable to allow a selective transfer of an energized fluid in, and an exhaust out, of the cylinder via the ports. The scotch yoke operatively interacting with a crankshaft, the piston operatively connected to the scotch yoke such that, when the energized fluid moves the piston, torque is applied to the crankshaft, and the valves are repositioned to allow the energized fluid to enter the cylinder on the opposite side of the head of the piston and the exhaust to exit the cylinder.

An apparatus comprising a motor and an engine having a first fuel supplier supplying an oxidizer and a second fuel supplier supplying a dense fuel. The engine producing power to drive a ducted fan. The apparatus optionally comprising a hydraulic system.

The invention has many aspects. One aspect is that of an internal combustion engine (8010) that has a piston (8020) within a cylinder (8022) and has a crankcase (8012), defining a combustion chamber (8024) and crank volume (8026). A passageway (8032 and 8034) links the combustion chamber (8024) and the crank volume (8026). There is provided valve means (8038) for selectively closing the linking passageway and valve means (8030) for selectively closing and inlet to the crank volume (8026). In another aspect, there is an improvement to a scotch yoke fluid device. A displaceable member for relieving pressure in a variable volume chamber in the cylinder where combustion is occurring is provided. The invention includes a method of varying power output of a scotch yoke device, by choosing cylinder angle, pin angle and firing order in various ways. The invention also deals with other aspects of scotch yoke designs.

An X-Engine assembly includes four cylinder banks which are located on two intersecting planes with the crankshaft axis being on the line of the intersection of the two planes, and having a Double-Acting Scotch Yoke (DASY) power conversion system that couples the reciprocating motion of the pistons with the rotating crankshaft to provide pure sinusoidal piston motion. A series of DASY X-Engine configurations that satisfy even-firing for both 2-stroke and 4-stroke, and other engine cycles, achieve perfect balance with regard to vibrating forces and moments that are all zero, and all configurations have zero torsional vibration of the crankshaft resulting from the reciprocating masses.

An output shaft assembly for a jigsaw having a tool housing, a motor arranged in the tool housing, and an output shaft adapted to be driven in a reciprocating motion relative to the tool housing by means of the motor and to support jigsaw blade for reciprocating motion of the blade relative to the tool housing is disclosed. The output shaft assembly comprises an output shaft (20) of generally flat cross section and having a pair of generally D-shaped inserts (94) to form a region of generally circular external cross-section to allow the output shaft (20) to pivot relative to a scotch yoke mechanism (54) for driving the output shaft in a reciprocating motion relative to the tool housing. A jigsaw incorporating the output shaft assembly is also disclosed.

The invention provides a metal hammering machining tool applied to a six-axis robotic arm. The metal hammering machining tool applied to the six-axis robotic arm is composed of an aluminum alloy supporting frame, an aluminum alloy cable clamp, a hammering head and a direct current motor. The hammering head is composed of a steel striking head, steel rods, a scotch yoke, a rotary disk, a collar, bearings and a fixed disk. The two steel rods in an upper and lower arrangement mode are connected through the Scottish yoke. The steel striking head is arranged at the bottom of the steel rods. One end of the upper steel rod is inserted into the linear bearing at the top of the aluminum alloy supporting frame. One end of the lower steel rod is inserted into the linear bearing at the bottom of the aluminum alloy supporting frame. One side of the aluminum alloy supporting frame is provided with a round hole. The direct current motor is arranged at the round hole and fixed to the aluminum alloy supporting frame through the aluminum alloy cable clamp. A rotating shaft of the direct current motor is inserted into the bearings. The bearings, the fixed disk, the collar and the rotary disk are concentrically mounted together to form a whole fixed to the aluminum alloy supporting frame through screws. An eccentric shaft of the rotary disk is inserted into the scotch yoke. The metal hammering machining tool applied to the six-axis robotic arm is simple in structure and easy to operate.

The invention relates to a nucleic acid extracting device, which is characterized in that the nucleic acid extracting device comprises an oscillator component, a sample holder component, a control system and a frame; the oscillator component comprises an electric motor, an eccentric sleeve connected on the output shaft of the electric motor, a bearing connected on the eccentric shaft of the eccentric sleeve and a bearing sleeve connected on the external ring of the bearing; a threaded sleeve integrated with the bearing sleeve is arranged at the top of the bearing sleeve and a rotation stopping sleeve is arranged on the retaining plate of the electric motor; a plurality of extension springs are connected between the rotation stopping sleeve and the bearing sleeve; the sample holder component comprises a test tube stand, a plurality of sample tubes inserted and arranged on the test tube stand and a scotch yoke arranged at the top of the sample tube; the top of the scotch yoke is connected with a locking cover and the top of the locking cover is connected with a locking handle; the bottom screw rod of the locking handle passes through the locking cover, the scotch yoke and the test tube stand so as to be fixed in the threaded sleeve of the oscillator component and the scotch yoke is elastically connected with the test tube stand. The invention can be used for extracting the nucleic acids of the microorganicsms such as the bacteria (G+ bacteria, G-bacteria, mycobacterium), fungi (yeast, white candida), viruses, etc., including the extraction of the RNA.

A vest for a human body has an air core coupled to a pulsator operable to subject the vest to pulses of air which applies and releases high frequency pressure forces to the body. The pulsator has two diaphragms connected to a brushless electric dc motor with rotary to reciprocating linear motion transmitting mechanisms comprising scotch yokes having anti-lash assemblies operable to generate air pulses in an air pulsing chamber. The diaphragms also increase the pressure in a manifold chamber. A check valve connects the manifold chamber with a pulsing chamber to allow pressurized air to flow from the manifold chamber into the pulsing chamber. An air flow control valve in communication with the manifold chamber is used to adjust the pressure of the air in the manifold and pulsing chambers. A programmable motor controller adjusts the duration of operation and speed of the motor to vary the operational time and frequency of the air pulses.

In a cryogenic refrigerator, a scotch yoke mechanism includes an eccentric rotating body and a yoke plate that reciprocates by rotation of the eccentric rotating body. A displacer is connected to a yoke plate so as to reciprocate together with the yoke plate. A cylinder houses a displacer, and an expansion space for refrigerant gas is formed in a space with the displacer. An airtight container is provided on a high-temperature side of the cylinder and includes a housing space housing a scotch yoke mechanism and receive the refrigerant gas discharged from the expansion space. The airtight container includes a supporting unit that supports a side portion of the yoke plate so as to restrict tilting of the yoke plate around a rotary shaft of the eccentric rotating body.

This invention is a continuous variable transmission. This invention uses a mechanism known as “scotch yoke” principle to change the ratio of the input and output in the transmission. This invention uses a set of non-circular gears and circular gears to modify the input received from a system to deliver a steady and uniform output. It employs a unique way to change the ratio between the input and output of the transmission. Three very simple mechanisms are used to achieve changing the ratio. The option of reverse, park, and neutral gear mechanisms are integrated into this design. This invention offers a co-axial input to output feasibility.