Abstract: (57) A travel multiplying device (1) has at least one outer pipe (2), one inner pipe (3) and one intermediate pipe (4) positioned between them, which can be moved relative to each other in the longitudinal direction (5) each by a particular distance of travel (16-36) with at least one cut-out formed (11-17) between facing surfaces (7, 8, 9, 10) of each pipe (2, 3, 4), which cut-outs show different gradients (18, 19) relative to a transverse plane (21) through the pipes (2, 3, 4), and which are coupled with each other by at least one movement linking element (22-26) to link the movements of the pipes. By such a travel multiplying device, a small movement of one element is transformed into a magnifying movement of another element in a simply designed and reliable manner.

Abstract: The disclosure relates to fluid working devices including reciprocating internal combustion engines and pumps. A number of arrangements for pistons and cylinders of unconventional configuration are described, many intended for use in IC engines operating without cooling. Included are toroidal combustion or working chambers, some with fluid flow through the core of the toroid, pistons reciprocating between pairs of working chambers, fluid processing volumes partly surrounding portions of the cylinder, tensile valve actuation, tensile links between piston and crankshaft, energy absorbing piston—crank links, crankshafts supported on gas bearings, cylinders rotating in housings, injectors having components reciprocate or rotate during fuel delivery. In some embodiments pistons may rotate while reciprocating.

Abstract: A shift member for gear shifting in a gear box is provided. The shift member is cylindrical and it includes an arrangement for activating different gears at different angular positions of the shift member and an actuation part for effecting pivoting of the shift member when actuated. The shift member actuation part includes an actuation structure with angularly spaced depressed portions and projecting portions. A gear shifting arrangement is also provided and includes the shift member and an actuation system including at least one actuation member for selective engagement with the actuation structure at different positions in the circumferential direction of the shift member for a stepwise rotation of the shift member.

Abstract: A valve actuator comprising a lower housing comprising a mounting spool that is operable to couple to a valve body. A rotating sleeve is disposed within the lower housing and coupled to a stem connector. A fixed sleeve in disposed within the lower housing and includes a first slot disposed therethrough. A second slot is disposed in the rotating sleeve, wherein at least one of the slots is a helical slot. An axle engages both the first slot and the second slot. A shaft is coupled to the axle and extends through a connector flange that is coupled to an upper end of the lower housing. A piston is coupled to the shaft and movably disposed within an upper housing that is coupled to the connector flange. Axial movement of the piston within the upper housing will result in rotational movement of the rotating sleeve.

Abstract: A grooved cylinder (2) is alternatively mobile in two opposing cylinder guides (10, 11) mounted on a crankcase (14). This cylinder (2) is mounted coaxially inside a double crown piece of revolution (5) with an indented portion (6a) to rotate around the axis (2a) of the cylinder (2) over bearings (B2) coupled between a third groove (16) of the respective crankcase cover (14a, 14b) and the respective housing (9) of the external bases of the ends (6) of the crown (5); these cylinder (2) and crown (5) are coupled by means of bearings (B1) placed between a first groove in zigzag (3) in the side surface of the cylinder (2) and the first housings (8) in the inside of the crown (5), and other bearings (B1) placed between some straight grooves (4), also on the side surface of the cylinder (3) extending between its ends and the valleys (3a) of the first groove (3), and third housings (15) provided in the respective crankcase cover (14a, 14b).

Abstract: An axial adjusting device comprising two discs which are rotatable relative to one another, which are supported coaxially relative to one another and between which there are guided balls in pairs of ball grooves whose depth varies across the circumference. Of the discs, one is axially supported and one is axially displaceable against resilient returning forces of spring means. At least one of the discs is rotatingly drivable by a driving motor. For load reducing purposes, at least two balls are guided in each of the pairs of ball grooves.

Abstract: A drive mechanism is interposed between two members to make the members move relatively with respect to each other. At least one of the two members is guided to move linearly. The drive mechanism comprises: cam followers that are rotatably supported on one of the two members, that are arranged in the linear moving direction, and that are spaced from each other; and a cam that is rotatably supported on the other one of the two members and that is provided in its circumference with a cam groove in which the cam followers engage, the rotation axis of the cam being arranged in the direction of the linear moving direction. The two members are made to move relatively with respect to each other by driving the cam to rotate and making the cam followers engage successively in the cam groove and move in the direction of the rotation axis.

Abstract: The disclosure relates to fluid working devices including reciprocating internal combustion engines and pumps. A number of arrangements for pistons and cylinders of unconventional configuration are described, mostly intended for use in IC engines operating without cooling. Included are toroidal combustion or working chambers, some with fluid flow through the core of the toroid, pistons reciprocating between pairs of working chambers, tensile valve actuation, tensile links between piston and crankshaft, energy absorbing piston-crank links, crankshafts supported on gas bearings, cylinders rotating in housings, injectors having components reciprocate or rotate during fuel delivery. In some embodiments pistons mare rotate while reciprocating. High temperature exhaust emissions systems are described, including those containing filamentary material, as are procedures for reducing emissions during cold start by means of valves at reaction volume exit.

Abstract: An axial adjusting device includes two discs which are rotatable relative to one another and coaxially supported relative to one another, between which two discs balls are guided in pairs of ball grooves. The depth of the pairs of ball grooves is variable across the circumference of the discs. One of the discs is axially supported and one is axially displaceable against resilient returning forces of a first spring mechanism. At least one of the discs can be driven by a motor via a gear drive. A second spring mechanism is provided which—during the return motion of the discs, after the balls have reached their end positions in the ball grooves, which end positions are determined by the greatest groove depth—permit the drivable disc to overshoot against the resilient returning forces of the second spring mechanism.

Abstract: A counterweight is provided to cancel axial vibration of a plunger of a saber saw. Swing rollers, rotatably supported at both ends of a roller shaft provided at a rear end of the plunger, are interposed between a pair of opposing tracks formed in an axially elongated groove formed on the counterweight.

Abstract: A transmission with an essentially unloaded neutral position includes two curved-path carriers each having a curved path and a coupling element configured to engage with the curved paths of the curved-path carriers. The coupling element includes an engaging element which engages with the curved paths of the curved-path carriers. The engaging element is biased by a prestress against the curved path of each of the curved-path carriers in the essentially unloaded neutral position of the transmission.

Abstract: A reciprocating saw including a housing, a motor supported by the housing, a spindle mounted for reciprocation relative to the housing and having a front end for supporting a saw blade, the spindle being movable through a cutting stroke and a return stroke, the cutting stroke having a stroke length, and a pivot body interconnecting the spindle and the motor. The position of the pivot axis of the pivot body may be movable relative to the housing to change the stroke length of the spindle. A shock absorber may be operatively positioned between the motor and the front end of the spindle and may be at least partially mounted within the spindle.

Abstract: The cam device of the invention includes individually rotatable first and second cam followers performing predetermined movement along a groove defined by first and second sidewalls. The cam followers are positioned so that their axes extend in the same direction. Movement of the first cam follower is restricted by at least part of the first sidewall, and movement of the second cam follower is restricted by at least part of the second sidewall.

Abstract: A reciprocating saw including a housing, a motor supported by the housing, a spindle mounted for reciprocation relative to the housing and having a front end for supporting a saw blade, the spindle being movable through a cutting stroke and a return stroke, the cutting stroke having a stroke length, and a pivot body interconnecting the spindle and the motor. The position of the pivot axis of the pivot body may be movable relative to the housing to change the stroke length of the spindle. A shock absorber may be operatively positioned between the motor and the front end of the spindle and may be at least partially mounted within the spindle.

Abstract: A butterfly valve comprises a valve housing with a valve opening and a valve seat, this valve housing enclosing a vacuum area of the valve; a valve plate which is mounted at a valve rod guided through the valve housing and which is pressed against the valve seat in a closed position of the valve, tilted relative to the valve seat in a partially open position of the valve through tilting of the valve rod about a tilting axis, and tilted and rotated relative to the valve in a completely open position of the valve by subsequent rotation of the valve rod about its longitudinal axis; wherein the valve rod has portions extending on both sides of the tilting axis, the portion located on one side of the tilting axis acting centrally at the valve plate and the portion located on the other side of the tilting axis being connected, via a link guide which is located outside the vacuum area and which has a link with a part extending at an inclination to the longitudinal axis of the valve rod and a helical surface-shaped p

Abstract: A speed reducer utilizes a cam driver and a cam follower both having sinusoidal grooves. The numbers of peaks and valleys in the cam driver and the cam follower grooves are controlled to achieve a desired change in speed between an input shaft and an output shaft. The use of the cam drive system allows a wide range of speed control in a relatively small package, and further ensures quiet operation.

Abstract: The cam device of the invention includes individually rotatable first and second cam followers performing predetermined movement along a groove defined by first and second sidewalls. The cam followers are positioned so that their axes extend in the same direction. Movement of the first cam follower is restricted by at least part of the first sidewall, and movement of the second cam follower is restricted by at least part of the second sidewall.

Abstract: Two cam plates each have at least one groove providing a non-circumferential ball ramp. The ball ramp of the second cam plate intersects with the ball ramp of the first cam plate when viewed axially. At least one ball is positioned between the first and second cam plates, in the grooves of the first and second cam plates. The ball is biased radially to ensure that the ball follows the non-circumferential ball ramps of both cam plates in response to relative rotation of the two cam plates.

Abstract: Traversing rods in textile machines producing crosswound bobbins are often made of carbon fibers for the purpose of reducing the inertia force. These kinds of traversing rods are prone to wear at their bearing points. For this reason, the traversing rod whose bearings have a distance between them which corresponds to at least twice, preferably three times the traversing stroke, is so far displaced in its longitudinal direction in order to re-new the bearing points that other areas of the traversing rod than before now act together with the bearings.

Abstract: A rotary-to-linear converter for use with a valve actuation device having a linear reciprocating cam shaft having longitudinally extending cam grooves that are engaged by captive cam followers which oscillate up and down in response to sideways reciprocation of the camshaft for actuating intake or exhaust valves of internal combustion engines or other devices employing reciprocating pistons and valves. The camshaft is caused to reciprocate by a rotary linear converter of the “yankee” type composed of double helix channel at the extreme end of the camshaft and a rotary drive collar having two sets of diametrically opposed guide members. The guide members comprise dogs which are rotatably engaged with the drive collar and slidably engaged with the double helix channel of the cam shaft.

Abstract: A high torque rotating actuator is disclosed. The high torque rotating actuator has a variable helix angle that allows the actuator to generate greater torque near the end of its travel when it is needed to close a valve or operate a choke. The high torque rotating actuator is designed for use with valves and chokes. In a second embodiment, a high torque rotating actuator is configured to give a shorter overall assembly. As in the preferred embodiment, a variable helix angle is used to generate greater torque near the end of its travel when it is needed to close a valve or operate a choke.

Abstract: A reciprocating saw including a housing, a spindle mounted for reciprocation relative to the housing and having a front end adapted to support a saw blade, the spindle being movable through a cutting stroke and a return stroke, a motor for moving the spindle in a reciprocating fashion, and a reciprocating member interconnecting the motor with the spindle. The motor and the spindle define a drive force path from the motor to the spindle and passing through drive force bearing components of the reciprocating saw, and wherein at least part of the reciprocating member is in the drive force path. The reciprocating member is configured to counterbalance the spindle. A pivot body interconnects the spindle with the motor. A shock absorber is operatively positioned between the motor and the front end of the spindle, and is at least partially mounted within the spindle.

Abstract: A rotor (1) is of a substantially spherical shape with one complete half of the sphere (2) still remaining. The rotor (1) effective takes the shape of the head of a "mushroom." The other half of the sphere has had its material removed or omitted forming the stem (3). The depth of the cut "D" and the length "L," the radius of the sphere, will determine the ratio of the respective weights of the complete half sphere (2) and the stem portion (3). Suitably the weight of the one half to the other half of the spherical body is between about 0.75 and 0.85 and more preferably 0.8. When an external force is applied to the rotor (1), it rotates simultaneously about a pair of orthogonal axes one of which is defined by the edge (6) of the spherical body between the two halves.

Abstract: A system is provided for transmitting a.c. electrical power across a small, even gap, without any physical contact, from a primary pole system to a secondary pole system, one of which moves relative to the other. Relative movement between the pole system may be rotational as when the primary and secondary pole systems are coaxial, or may involve translational linear motion as when there is an elongate primary pole system and an elongate parallel secondary pole system. The purpose, whether the relative motion is rotational or translational, is to transfer electrical power at a controlled frequency, voltage, and current level across the gap for utilization at the relatively moving poles/elements of the system. The magnetic field across the gap between the primary and secondary pole systems is always changing in accordance with the power supplied to the primary coils and this changing field remains continuous throughout the distance traveled by the secondary poles.

Abstract: A low vibration motion translation system for converting continuous rotary motion into reciprocating linear motion employs a counterweight or counterbalance mechanism moving in the opposing direction to the reciprocating linear driver or piston to reduce vibration. As the counterbalance is driven linearly in the opposing direction to the reciprocating piston, opposing forces are generated to counteract the unbalanced forces created by the translation, with a resultant reduction in vibration.

Abstract: A device for actuating a valve including a body having a slot therein. A pin is positioned within the slot, and the pin is attachable to a valve stem of a valve, whereby when the valve stem is attached to the pin and the pin is moved within the slot, the valve stem moves therewith and actuates the valve. There is also a rotary actuator assembly including a rotary actuator, a body having a chamber therein attached to the actuator, and a valve associated therewith. A slot is provided in part of the chamber, and a pin extends through the slot for guiding movement of the valve stem of the valve when the valve stem is attached to the pin and the rotary actuator is actuated. The slot may be configured as a helical slot. A piston may be provided between the valve stem and the pin. The configuration of the slot may be varied for changing the length of movement of the pin, so as to change the length of movement of a valve stem attached thereto.

Abstract: A gyroscope powered by an engine, all fabricated on a common substrate in the form of an integrated circuit. Preferably, both the gyroscope and the engine are fabricated in the micrometer domain, although in some embodiments of the present invention, the gyroscope can be fabricated in the millimeter domain. The engine disclosed herein provides torque to the gyroscope rotor for continuous rotation at varying speeds and direction. The present invention is preferably fabricated of polysilicon or other suitable materials on a single wafer using surface micromachining batch fabrication techniques or millimachining techniques that are well known in the art. Fabrication of the present invention is preferably accomplished without the need for assembly of multiple wafers which require alignment and bonding, and without piece-part assembly.

Abstract: A fully enclosed cam-actuated drive device for providing both lift and translational movements, incorporating protection against damage in either horizontal or vertical overload situations, achieved by providing optional spring protection along the vertical and/or horizontal axes, a roller gear cam for lift motion, a barrel cam for translational motion, translation guide rods, a translational carriage assembly slidably received on the translation guide rods, an input drive shaft, and vertical lift rods. The device may be configured as a walking beam device to impart a U-shaped output motion, or alternatively a closed box-shaped motion, as desired. A split carriage assembly reduces backlash of the device and a sliding dust cover prevents foreign objects from entering the drivers cam-actuated internal operating structure.

Abstract: A flat pack gyroscope fabricated of a number of discrete flat layers, which, when assembled together, accomplish a version of a single degree of freedom, spinning wheel gyroscope.

Abstract: An electromagnetic drive apparatus and method are operative to rotate a magnetically levitated object for an indefinite period of time. The object, such as a spinning magnetic top with a spindle, is levitated over a base magnet and a horizontal component of a pulsed magnetic field is applied at the region of the spinning magnetic top to maintain the top spinning and levitating indefinitely. The pulsed magnetic field is generated by applying a pulsed dc voltage or an ac current to a coil situated in proximity to the top. The coil may have a cylindrical or oblong shape and a core may be provided in the coil. Levitation stability and duration are improved by positioning a loosely fitting washer on the spindle of the spinning magnet so as to permit relative rotation therebetween during application of the pulsed magnetic field.

Abstract: A driving device of the massaging chair including a main shaft, a bevel gear mounted on one end of the main shaft, a worm rod mounted on another end of the main shaft, and a driving rotor mounted slidably between the bevel and the worm rod. When the main shaft is driven by a motor to turn forward, the driving rotor is engaged with the bevel gear to actuate a kneading shaft of the massaging chair. When the main shaft is driven by the motor to turn backward, the driving rotor becomes disengaged with the bevel gear and moves away from the bevel gear to engage the worm rod so as to actuate a beating shaft of the massaging chair.

Abstract: Motion is transmitted by means of a kinematic chain, comprising four members--a driving, driven, intermediate and support members. The driving, driven and supporting members rotate about a common axis. The intermediate member, by virtue of its operative linkages with the driving, driven and supporting members, rotates about the common axis and translates either parallel or, according to another version, perpendicular to the common axis. The supporting member is stopped during motion transmission. The intermediate member moves with respect to the driving, driven and supporting members during motion transmission. The directions of these motions define angles with the direction of motion of the driving member in the plane parallel or perpendicular, respectively, to the common axis. Changing the at least one of the angles can change the ratio of the speeds of the driving and driven member.

Abstract: A mechanical oscillator including a shaft having an endless groove in its periphery, a nut body carried by and slidable along the shaft at the location of the endless groove, and a roller pin carried by the nut body, having a nose portion extending into and engaging a wall of the endless groove and having a tail portion disposed deeply in the nut body. A plurality of anti-friction bearings is carried by the nut body, the bearings carrying the roller pin. The anti-friction bearings include both a ball bearing and a needle bearing, the ball bearing being disposed adjacent the nose portion of the roller pin, and the needle bearing being located adjacent the ball bearing and engaged with a tail portion of the roller pin. Multiple roller pins can be used, carried on two carrier strips respectively, which are axially displaced and disposed at opposite sides of the nut body. The carrier strips and associated roller pins can be removed as units, thereby simplifying replacement as required by damage or wear.

Abstract: A variable pitch lead transmission mechanism includes a slider, a screw rod having a screw thread and two opposite screw thread surfaces and mounted on the slider, a driver contacting with one of the screw thread surfaces and adapted to be translated by a power source in order to in turn rotate the screw rod, and an elastic element mounted between the screw rod and the driver for providing a buffering action therebetween. Preferably, the buffer effect of the elastic element automatically accommodates the spin angle .beta. of the driving base and the contact locations between the driver and the screw thread surface so as to avoid therebetween an adversely expanded clearance.

Abstract: A heavy-duty mechanical/oscillator utilizes a shaft having an endless cam groove in its periphery, and a nut body carried by and slidable along the peripheral portion of the shaft. A roller pin on the nut body, extends into and engages a wall of the endless groove. The roller pin's nose portion is conical, whereby the pin is subjected to oblique loading having both intense radial and lesser axial components. Paired anti-friction roller bearings carried by the nut body in turn rotatably mount the roller pin. The bearings include a primary oblique-loading roller bearing disposed adjacent the nose portion of the roller pin and oriented to counter the intense radial forces and lesser axial forces experienced by the nose portion, and a secondary oblique-loading roller bearing located adjacent the primary bearing and engaged with a tail portion of the roller pin. The secondary roller bearing is oriented to mainly counter radial forces experienced by the nose portion.

Abstract: The invention relates to a pulsator with an improved structure and more particularly to a pulsator having punching function used in the washing machine. The pulsator of the present invention is composed of such improved structure that a rotating member has a guiding dimple formed on the its upper end surface, and an elevating member has a guiding protrusion projected from the inner surface. According to such pulsator, non-symmetrical water flow and up-and-down water flow can be generated easily so that the entanglement of the washing articles can be minimized, and the washing is carried out effectively.

Abstract: A mechanical oscillator including a shaft having an endless groove in its periphery, a nut body carried by and slidable along the shaft at the location of the endless groove, and a roller pin carried by the nut body, having a nose portion extending into and engaging a wall of the endless groove and having a tail portion disposed deeply in the nut body. A plurality of anti-friction bearings is carried by the nut body, the bearings carrying the roller pin. The anti-friction bearings include both a ball bearing and a needle bearing, the ball bearing being disposed adjacent the nose portion of the roller pin, and the needle bearing being located adjacent the ball bearing and engaged with a tail portion of the roller pin. The roller pins are carried on two carrier strips respectively disposed at opposite sides of the nut body. The carrier strips and associated roller pins can be removed as a unit, thereby simplifying replacement as required by damage or wear.

Abstract: The invention is directed to a backlash-free cam drive which can be subjected to an impact load. The cam drive includes: a housing defining a longitudinal axis; a cam follower assembly mounted in the housing so as to be displaceable along the axis fixed against rotation about the axis; an adjusting member mounted on the housing so as to be rotatable about the axis and relative to the cam follower assembly; and, a cam formed in said adjusting member so as to define two mutually adjacent guide cams extending along a guide path.

Abstract: A power receiving, torque translating, output device receives reciprocating power from a plurality of external power producers. The received reciprocating power is timed and controlled by a cam affixed inside a rotor rotating about a stationary central shaft. The central shaft is mounted inside an octagonal central block, and extends to provide rotatable mounting for the rotor. The rotor has a drum shaped portion so positioned as to overlap the entire length of the block thus placing the cam in close proximity rotation around the block. The block has rectangular grooves adapted to guide a plurality of cam following actuators during the reciprocating motion of each one. Each actuator derives motion from a connecting rod attached both to the actuator and to its respective external power producer. Each cycle of reciprocation of each actuator contains one power stroke in each direction for a total of two power strokes per cycle.

Abstract: A wave cam type compressor includes cylinder blocks. A drive shaft is rotatably supported in the center cylinder blocks. A plurality of cylinder bores are defined about the drive shaft in the cylinder blocks. A wave cam, mounted on the drive shaft, comprises opposing cam surfaces. A width of second portions which move a piston to its bottom dead center position is more narrow than a width of first portions which move a piston to its top dead center position. The pistons are connected to the wave cam by way of shoes. The shoes move along a predetermined path on the cam surfaces. The shoes and the wave cam convert the integral rotation of the drive shaft and wave cam to a reciprocating movement of the pistons to compress fluid introduced into the cylinder bores.

Abstract: A drive apparatus equipped with a ball screw and has nuts fitted onto a screw shaft to be approaching each other. Ends of the nuts are coupled to each other while being able to rotate freely with respect to each other. The screw shaft has two opposing threads formed thereon which are engaged respectively with the nuts.

Abstract: Disclosed is a water-supply valve of a washing machine in which the consumption of electric power can be minimized in opening and closing the valve to supply water into and block off the water supply from a washing tub of the washing machine. In the water-supply valve, an actuator rod is elevated against downward biasing force of a spring by a magnetic force of the solenoid generated by applying a voltage thereto, and then is retained at its uppermost position by a stopper. The stopper has a guide groove of an inverted-heart shape formed therein, which has four guide surfaces.

Abstract: The invention relates to a pulsator with an improved structure and more particularly to a pulsator having punching function used in the washing machine. The pulsator of the present invention is composed of such improved structure that a rotating member has a guiding dimple formed on the its upper end surface, and an elevating member has a guiding protrusion projected from the inner surface. According to such pulsator, non-symmetrical water flow and up-and-down water flow can be generated easily so that the entanglement of the washing articles can be minimized, and the washing is carried out effectively.

Abstract: A valve activation device having a linear reciprocating cam shaft having longitudinally extending cam grooves that are engaged by captive cam followers which oscillate up and down in response to sideways reciprocation of the camshaft for activating intake or exhaust valves of internal combustion engines or other devices employing reciprocating pistons and valves. The camshaft is caused to reciprocate by a rotary linear converter of the "yankee" type composed of double helix channel at the extreme end of the camshaft and a rotary collar having two sets of diametrically opposed guide members.

Abstract: A multi-freedom electric motor has a broad operational range and a wide space for accommodating an article. The electric motor includes a spherical rotor, a plurality of magnets disposed on an outer surface of the rotor with polarities of the respective adjacent magnetic poles being different from one another, a stator provided along the outer surface of the rotor, and a plurality of magnets opposed to the magnets disposed on an inner surface of the stator. The rotor is supported by a spherical bearing provided on the stator. Either the magnets on the rotor or the magnets on the stator are electromagnets. Electric current are supplied to the electromagnets as controlled by a controller. The multi-freedom electric motor can be employed in a space stabilizer for maintaining the spherical attitude of an article, a control moment gyro for performing an attitude control in space, and an agitating apparatus.

Abstract: A displacement piston pump has a drive shaft that is driven by a rotating motor. The pump includes a piston which is axially movable within a cylinder and is connected to a piston guide shaft. The drive shaft and the piston guide shaft are rotatably coupled to each other, but some axial movement is permitted between these two members. The drive shaft and the piston guide shaft are coaxially aligned with respect to each other. The piston guide shaft has a guide element connected thereto. The guide element is guided in a guide way. The piston stroke can be maintained with high precision. The piston guide shaft is rotatably and axially supported in a support housing. The support housing contains the guide way therein and a guide element is rigidly connected to the piston guide shaft.

Abstract: An electric toothbrush having in its slip-on brush a piston is disclosed, which is set rotating by a motor shaft projecting out of the handle segment. This piston exhibits a lifting cam, by means of which it effects an axial motion relative to the motor shaft in the slip-on brush. This axial motion causes a reciprocating motion of a toothed rack, which sets the bristle tufts of the toothbrush rotating.

Abstract: Disclosed is a compressor having a plate rotatable about an axis of a rotary shaft and a piston connected to the plate, wherein the plate causes the piston to reciprocate between a top dead center and a bottom dead center of its stroke in accordance with the rotation movement of the plate. A cam surface is provided with the plate for actuating the piston. A shoe engages with the plate for transmitting the rotation movement of the plate to the piston. A recess is formed on the piston for restricting rolling of the shoe on the plate for causing the shoe to slide on the plate to reduce the pressure caused by the contact between the cam surface and the shoe.

Abstract: An electric toothbrush having separable handle and brush segments, a rotating motor shaft extending exteriorly of the handle segment, and a reciprocating toothed rack in the brush segment which engages and imparts a counter-rotating movement to a plurality of tufts on the brush head. A cylindrically shaped gear mounts to and is axially movable on the motor shaft when the brush and handle segments are attached together. First and second lifting cams configured as elliptical flanges lying in oblique planes are provided in radially spaced relationship on the exterior surface and interior bore hole of the gear, respectively. Respective first and second guide grooves are associated with the lifting cams and the reciprocal toothed rack whereby rotation of the gear generates a long stroke of the rack through the interaction of the first and second lifting cams and guide grooves.

Abstract: A control valve comprised of a housing having a central, vertical bore retaining therein a flexible, tubular sleeve whose central portion can be eccentrically motivated towards or away from a valve seat with the aid of a ball pushed by a valve stem moving inside of the sleeve and having a slanted, camming groove, which is in contact with the ball, and where the valve seat is located perpendicularly towards and at the center of said vertical bore. The sleeve itself is retained within the housing by an upper and lower flanged plate.