Abstract: A crankshaft supporter having a support member which is attached to a cylinder block of an engine so as to support a crankshaft and which is formed of an aluminum alloy matrix with a preform cast inside. The support member includes a mounting surface, bolt holes and a dowel hole. A penetrated section of the preform has a through hole defining the bolt hole. The support member has a recess section formed of the matrix. The recess section is positioned between the mounting surface of the support member and an opposing surface of the penetrated section that faces the mounting surface so as to shape the dowel hole therein.

Abstract: An apparatus for preventing abrasion in a reciprocal compressor, including a cylinder, a reciprocal motor having a stator and a mover, and generating a linear reciprocation driving force, a piston inserted into an inside space of the cylinder to be linearly movable, a piston rod coupled to the piston to be movable in the radial direction of the piston, and coupled to the mover of the reciprocal motor, for transmitting the linear reciprocation driving force of the reciprocal motor to the piston, and a concentricity control means coupled to a junction between the piston and the piston rod, for fixing the piston and the piston rod in the axial direction, and allowing a relative motion thereof in the radial direction. The apparatus prevents abrasion from being generated between the cylinder and the piston due to processing errors and assembly errors of components of the reciprocal compressor.

Abstract: A piston pump or compressor has a dynamically balanced drive assembly in which nearly all of the rotational, oscillatory and axial forces on the rotating drive shaft are canceled. The piston is primarily balanced by adding an oscillating counter weight mounted to the connecting rod to convert oscillatory forces into rotational forces at the axis of an eccentric element mounting the piston to the drive shaft. The remaining unbalanced rotational forces are centered along the drive shaft by a rotating counter weight. A further counter weight is mounted to the drive shaft spaced along the drive shaft from the rotating counter weight to impart a counter moment on the drive shaft and essentially cancel the moment about a moment axis perpendicular to the drive shaft resulting from the axial spacing of the piston and the other two counter weights. A method of reducing vibration on a piston drive shaft is also disclosed.

Abstract: A piston pump assembly with a rotatingly driven swashplate in driving relationship with a rocker arm and piston engaged with one end of the rocker arm. A spring urges the rocker arm and piston into contact with an annular ring carried by a bearing in the swashplate. The spring may be a separate leaf spring or may be formed integrally with the rocker arm. The rocker arm engagement with the piston uses a spherical ball-joint-like surface. The contact between each of the rocker arm and piston and the annular ring utilize spherical surfaces on the rocker arm and piston, with an elongated footprint on the rocker arm and a circular footprint on the piston. The piston is allowed a slight radial play in operation.

Abstract: A reciprocating compressor is capable of preventing a bush, provided between an eccentric shaft and an eccentric shaft mounting hole of a connecting rod, from being deformed. The reciprocating compressor includes a rotating shaft rotated by a drive unit which generates a rotating force. An eccentric shaft is eccentrically rotated by the rotating shaft. A piston reciprocates by a force transmitted from the eccentric shaft, thus compressing a refrigerant. A connecting rod has, on an end thereof, an eccentric shaft mounting hole so that the eccentric shaft is mounted to the end of the connecting rod, and converts a rotating motion of the eccentric shaft into a reciprocating motion to reciprocate the piston. A bush is placed between the eccentric shaft mounting hole and the eccentric shaft to fill a space between the eccentric shaft mounting hole and the eccentric shaft, with a hinge hole being provided at a predetermined portion of the bush to allow the eccentric shaft to be rotatably fitted into the hinge hole.

Abstract: A hermetic reciprocating compressor, in which a bearing structure to support a rotating shaft is improved to minimize frictional contact between the parts of the compressor, thus reducing noise of the compressor and improving compression efficiency of the compressor. In the hermetic reciprocating compressor, a first annular bearing seat is formed around an upper edge of a shaft bore of a frame to seat therein a first radial bearing which sustains loads of a rotating shaft. The first radial bearing is a self-aligning radial bearing which allows the rotating shaft to self-align due to a clearance angle of the first radial bearing, even when a desired perpendicular arrangement of the shaft bore relative to a cylinder block is not formed, due to a mechanical tolerance of the frame.

Abstract: Dual capacity compressor including a power generating part including a reversible motor and a crank shaft inserted in the motor, a compression part including a cylinder, a piston in the cylinder, and a connecting rod connected to the piston, a crank pin in an upper part of the crank shaft eccentric to an axis of the crank shaft, an eccentric sleeve having an inside circumferential surface rotatably fitted to an outside circumferential surface of the crank pin, and an outside circumferential surface rotatably fitted to an end of the connecting rod, a key member for coupling the eccentric sleeve with the crank pin positively in all rotation directions of the motor, and damping means for damping impact occurred between the eccentric sleeve and members adjoin thereto, thereby preventing relative motion and wear/noise between parts that maintain an eccentricity.

Abstract: A pump for gases to be measured having a pump housing in which a pump chamber is located. The pump chamber is sealed off by a working membrane that is connected to a crank drive by a connecting rod or similar lifting mechanism. A heating device is provided in an upper area of the pump housing, particularly in the pump head. Heat insulation covering at least the pump head is provided. The heat insulation is in the form of an insulating housing having an inner wall spaced apart from the pump head in order to form a gas insulation layer.

Abstract: A device (1) for actuating at least one piston (2) moving axially in the bore (3) of a body (4), the piston (2) being driven by the longitudinal or curved movement (F2) of a control arm (5). Also disclosed is a method for detecting a failure in a device (1) having an intermediary element (6), located between the piston (2) and the control arm (5), this intermediary element (6) being also used as an alarm means should the intermediary element (6) be missing between the piston (2) and the arm (5). The invention is particularly applicable in the field of diagnosis.

Abstract: In order to connect a pneumatic booster (S) to a brake pedal (F), it is necessary to fix a control rod (1) of the booster (S) to the brake pedal (F). This fixing is made difficult because of the location of the booster which is located in the engine compartment and because of the location of the brake pedal (F) which is located in the cabin of a vehicle. In order to make it easier to fix the booster (S) to the brake pedal (F), a method for the rigid and blind fixing of the brake pedal (F) to the control rod (1) of the booster is provided. This result is obtained by nesting two nesting portions (2, 3) of a control rod (1) which are connected respectively to the booster and to the brake pedal. The two portions are held one inside the other using a spring clip (25) housed in a circular groove (26). This elastic attachment device also allows play to be taken up and allows the mounting to be stabilized.

Abstract: A hermetic reciprocating compressor, in which a bearing structure to support a rotating shaft is improved to minimize frictional contact between the parts of the compressor, thus reducing noise of the compressor and improving compression efficiency of the compressor. In the hermetic reciprocating compressor, a first annular bearing seat is formed around an upper edge of a shaft bore of a frame to seat therein a first radial bearing which sustains loads of a rotating shaft. The first radial bearing is a self-aligning radial bearing which allows the rotating shaft to self-align due to a clearance angle of the first radial bearing, even when a desired perpendicular arrangement of the shaft bore relative to a cylinder block is not formed, due to a mechanical tolerance of the frame.

Abstract: The invention relates to a scotch yoke fluid device (10). The scotch yoke fluid device (10) has a crank (11) with a big end having an axis (14) which orbits around a main axis (15) for the crank (11). Connecting means (13) are mounted on the big end axis (14). There is at least one piston (22) mounted for reciprocating motion in a cylinder (18) along a piston axis. The piston has a cross-sectional area perpendicular to the piston axis. The piston also has guide means (16) which include a linear surface transverse to the piston axis. The guide means (16) engage engagement means on the connecting means. There is at least one restricting means (24) for constraining the piston (22) to move along the piston axis. The restricting means (24), or a constraining means (19) for the restricting means (24), or both, always extend into a volume defined by the swept area of the crank (11), projected along the main axis (15) of the crank (11).

Abstract: A tappet turning prevention structure for a fuel supply apparatus includes a piston defining a fuel pressurizing chamber within the housing. A tappet disposed at one end of the piston has accommodated in it a roller driven by a cam of an engine and a roller supporting pin for transmitting a force from the cam to the piston. The tappet is housed by a bracket which has one or two grooves in an inner surface of it for supporting the roller supporting pin at one or both ends. The number of parts can be decreased because the turning prevention pin for the tappet and the roller supporting pin is a single common pin, and therefore the need of controlling of the press-fit loads is eliminated because no process for thrusting the tappet turning prevention pin into the outer circumference of the tappet is involved.

Abstract: Dual capacity compressor including a power generating part including a reversible motor and a crank shaft inserted in the motor, a compression part including a cylinder, a piston in the cylinder, and a connecting rod connected to the piston, a crank pin in an upper part of the crank shaft eccentric to an axis of the crank shaft, an eccentric sleeve having an inside circumferential surface rotatably fitted to an outside circumferential surface of the crank pin, and an outside circumferential surface rotatably fitted to an end of the connecting rod, a key member for coupling the eccentric sleeve with the crank pin positively in all rotation directions of the motor, and damping means for damping impact occurred between the eccentric sleeve and members adjoin thereto, thereby preventing relative motion and wear/noise between parts that maintain an eccentricity.

Abstract: A membrane pump (1) having a membrane (24) which can be actuated by a crank drive (32), which membrane bounds, together with a concave pump body surface (8), a pump chamber (38), an inlet channel (4) and an outlet channel (17) which open out at an inlet opening (9) and an outlet opening (20) in the pump body surface (8), the membrane (24) having a membrane core (25) and an elastically deformable membrane ring (26) and the membrane core (26) having a convex surface adapted to the pump body surface (8). The inlet opening (9) is arranged in the region of the pump body surface (8) which the membrane (24) first approaches upon an expulsion stroke of the crank drive (32), and the elastically deformable membrane ring (26) closes the inlet opening (9) before the attainment of top dead center of the crank drive (32).

Abstract: An airless spray pump is provided with a single-acting piston pump which allows the use of a low-cost yoke drive. Motor and pump shaft are offset for most efficient force utilization.

Abstract: A needle bearing for use in a pump has an inner race, embodied as an eccentric sleeve, needles, and an outer race with rims oriented radially inward on both of its face ends, of which one rim is intended to secure the axial position of the needles and the outer race by engagement with the inner race, in that a rim fits over one end face of the inner race. In the pump unit, the needle bearing is disposed with an axial gap from a roller bearing on a shaft of a drive motor. The rim of the outer race engages this gap.

Abstract: In a connecting apparatus of a hermetic reciprocal compressor to convert a rotary movement into a reciprocal sliding movement by connecting an eccentric portion of a crankshaft and a piston, the connecting apparatus has a ball; a first connecting member having a small diameter portion connected with a piston pin being connected with the piston, and a connection portion extended from the small diameter portion, which has a ball embracing surface to embrace the ball and supports the ball to be moved; a second connecting member having a large diameter portion rotatably connected with the eccentric portion, and an extending yoke portion at an outside of the large diameter, which supports the ball against the embracing surface and prevents the ball from being separated; and a third connecting member to connect the first connecting member and the second connecting member such that the first connecting member an the second connecting member relatively move with the ball being placed therebetween.

Abstract: A reciprocating compressor having a linear motor, at least one piston and cylinder arrangement and a mechanism operatively connecting the linear motor to the piston and cylinder arrangement is provided. The piston and cylinder arrangement operate to compress a fluid, preferably a refrigerant gas. The piston and cylinder arrangement has a cylinder, a piston configured and disposed to travel in the cylinder and a piston rod connected to the piston. The mechanism connects the linear motor to the piston rod to move the piston in the cylinder upon operation of the linear motor. The mechanism is configured and disposed to limit overtravel of the piston in the cylinder in response to a light load of the reciprocating compressor and to limit undertravel of the piston in the cylinder in response to a heavy load in the reciprocating compressor.

Abstract: The present invention relates to a mounting structure of a piston pin for a hermetic compressor. In the present invention, caulking portions 26 are beforehand formed in a connecting chamber 22 of the piston 20, and then, a piston pin 30 is fastened to the piston 20 by means of plastic deformation of the caulking portions 26. At this time, the caulking portions 26 are formed at upper and lower ends of an interference preventive portion 24 defined within the connecting chamber 22 and cause the upper and lower ends of the piston pin 30 to be fastened to the piston 20 within the connecting chamber 22 of the piston. According to the present invention, there is an advantage in that an outer diameter of the piston 20 is not changed during its assembling process, since the piston pin 30 can be fastened to the piston 20 merely by causing only the caulking portions 26 of the piston 20 to be subjected to the plastic deformation.

Abstract: A crankshaft supporter having a support member which is attached to a cylinder block of an engine so as to support a crankshaft and which is formed of an aluminum alloy matrix with a preform cast inside. The support member includes a mounting surface, bolt holes and a dowel hole. A penetrated section of the preform has a through hole defining the bolt hole. The support member has a recess section formed of the matrix. The recess section is positioned between the mounting surface of the support member and an opposing surface of the penetrated section that faces the mounting surface so as to shape the dowel hole therein.

Abstract: An actuator rod (17) for a turbocharger pressure control assembly comprises a first elongate portion (17a) defining a first rod end and a second portion (17b) defining a second rod end. The first and second portions are pivotally joined to one another to allow a degree of relative pivotal motion therebetween in at least one plane perpendicular to the axis of said elongate first portion (17a).

Abstract: An actuator assembly comprising at least one prime mover, a shaft having a first end and a second end, the shaft being operatively connected to the prime mover for reciprocal movement, a frame, the shaft being reciprocably movable in the frame, and linkage attached to the frame and operatively connected to the shaft, the linkage being movable between a first position and a second position in response to reciprocal movement of the shaft and a selectively engageable stroke-limiting assembly operatively connected to the shaft for controlling movement of the shaft, either by preventing any movement of the shaft or limiting its stroke a predetermined amount.

Abstract: A bearing system for accommodating angular movements occurring during operation of a linear actuator in a lifting structure for a ladle containing liquid steel in a continuous casting installation. Annular bearings on a piston and in an end wall of a piston and cylinder assembly allow free rotation of the piston about a first axis during controlled excursions of translating motion by the piston along the cylinder. A first attachment shaft is joined by cylindrical bearings to the arms of a first clevis for only sliding rotational motion about a second axis. A second attachment shaft secured to a second clevis carries a cylindrical bearing between the clevis arms for only sliding rotational motion about a third axis parallel with the second axis. A saddle is secured to an attachment on the piston rod and having an elongated annular load-bearing surface defining a fourth axis extending along a force transmitting junction with the first attachment shaft.

Abstract: A collapsible push rod for a brake booster in a vehicle is provided, having first and second telescoping members, and retractable locking means for selectively locking the first and second members together against telescoping. During a frontal impact collision, the members telescope into one another to shorten the length of the push rod and compensate for rearward movement of the brake booster and forward movement of the driver. The push rod is operable in the collapsed state. The push rod is also re-settable after the collision, and includes features for returning the push rod to its normal un-telescoped length following the collision, if the push rod is not damaged in the collision. The retractable locking means includes an electrically actuated solenoid for selectively locking and unlocking the first and second members against telescoping, in response to an electrical signal applied to the solenoid.

Abstract: This invention is directed to a locomotive air compressor that includes a detachable bearing housing that houses an outboard crankshaft bearing. The bearing housing includes a flange, a tapered housing and a bearing retainer. The housing also includes a central bore to allow for the passage of a crankshaft and an annular recess which supports the outboard crankshaft bearing. The addition of an outboard crankshaft support bearing allows the placement of the bearing closer to the electric motor, eliminating deflections that are inherent with extended, unsupported crankshafts. The elimination of crankshaft deflections allows the use of more efficient electric motors that have a smaller air gap between the rotor and the stator. The bearing housing is detachable to allow access to the bearings in the crankcase for easy servicing.

Abstract: It is an object of the present invention to provide a mounting structure of a thermal shield for an oil pump which makes it possible to securely mount the thermal shield at one point with high reliability and at a low cost. To achieve this object, a thermal shield for preventing radiant heat from an exhaust pipe from being transmitted to an oil pump is securely clamped to a support plate portion of a bracket which is disposed contiguous to the thermal shield. The thermal shield and the bracket are provided with an engaging protrusion portion and a positioning hole respectively. The thermal shield and the bracket are positioned through engagement of the engaging protrusion portion with the positioning hole.

Abstract: This invention is directed to a locomotive air compressor that includes a detachable bearing housing that houses an outboard crankshaft bearing. The bearing housing includes a flange, a tapered housing and a bearing retainer. The housing also includes a central bore to allow for the passage of a crankshaft and an annular recess which supports the outboard crankshaft bearing. The addition of an outboard crankshaft support bearing allows the placement of the bearing closer to the electric motor, eliminating deflections that are inherent with extended, unsupported crankshafts. The elimination of crankshaft deflections allows the use of more efficient electric motors that have a smaller air gap between the rotor and the stator. The bearing housing is detachable to allow access to the bearings in the crankcase for easy servicing.

Abstract: In a connecting apparatus of a hermetic reciprocal compressor to convert a rotary movement into a reciprocal sliding movement by connecting an eccentric portion of a crankshaft and a piston, the connecting apparatus has a ball; a first connecting member having a small diameter portion connected with a piston pin being connected with the piston, and a connection portion extended from the small diameter portion, which has a ball embracing surface to embrace the ball and supports the ball to be moved; a second connecting member having a large diameter portion rotatably connected with the eccentric portion, and an extending yoke portion at an outside of the large diameter, which supports the ball against the embracing surface and prevents the ball from being separated; and a third connecting member to connect the first connecting member and the second connecting member such that the first connecting member an the second connecting member relatively move with the ball being placed therebetween.

Abstract: Reciprocating compressor including a connecting rod for converting a rotating movement of a crank shaft into a linear reciprocating movement, a piston for making a linear reciprocating movement inside of a cylinder block by the connecting rod, and resonating means for resonating the piston, wherein the resonating means is a supplementary piston fitted to the piston additionally and a resonator fitted between the supplementary piston and the piston, or a resonator in a space between a sleeve side part and a piston side part of a divided connecting rod, thereby preventing an over pressure loss of the refrigerant and enhancing a performance by increasing refrigerant flow rate.

Abstract: A piston carrier (46) supports an elongated, slender piston rod (2) for reciprocation in a pump cylinder (30) to pump fluid into and out of the cylinder (30). The piston rod (12) is made of a material such as sapphire or zircon and has a diameter less than about ten millimeters, and the pump can provide flows of from about 50 nanoliters to about 250 microliters per minute at pressures of several hundred bars. A drive motor (18) rotates a threaded screw (58) and a drive nut (70) of a drive system (26) applies a linear drive force to the piston carrier (46). A ball and socket connection (74) between the drive system (26) and the piston carrier (46) avoids the need for precise alignment to prevent breakage of the fragile piston (12). A magnet (80) in the (78) holds the ball (76) in place and avoids the need for a spring or other mechanical holder. The socket (78) also includes a ring (88) of a low, reluctance material surrounding the ball (76) to increase the magnetic retention force.

Abstract: A twin piston power transmission mechanism with a bent link, the end of the link connecting with a cylinder is a bent arm, the link has thereon for a first piston rod and a second piston rod each a bushing hole to respectively mount a main piston and a secondary piston of a piston set, the bushing hole for the first piston rod is deviated from the shank of the link; a movable connecting piece is provided between the bushing hole for the first piston rod and the main piston to make connection of the piston with the link; when the piston is raised to an upper dead point, the accelerating power at the beginning of lowering the piston will generate a component force in a tangential direction of biased circular motion of a driving wheel by deviation of the bushing hole for the first piston rod from the shank of the link.

Abstract: A joint portion 33 of an oil pump shaft 19 and a balancer shaft (output-side balancer shaft 12) is provided in an open space between opposite surfaces of a sidewall 4b of an oil pump housing 4 and a sidewall 5c1-5c2 (a bearing portion) of a balancer shaft housing 5. The joint portion 33 of the oil pump shaft 19 and the balancer shaft 12 is comprised of a pair of engageable portions 33a, 33b provided at each end of the balancer shaft 12 and the oil pump shaft 19, respectively. The engageable portions 33a, 33b are disengageably engaged with each other in radial directions of the shafts 12, 19. The joint portion 33 can be seen from the outside, and thus a joining operation can be performed with ease.

Abstract: A master cylinder for use in the power train of a motor vehicle to actuate the brakes or the friction clutch is designed to avoid the generation of screeching noise and/or the transmission of stray movements to the piston rod in response to shifting of the piston relative to the housing and relative to the sealing element(s) between the piston and the housing. This can be accomplished by causing the piston to turn relative to the housing and the sealing element(s) during axial movement in the housing and/or by installing one or more dampers between the piston and the housing and/or between the piston and the piston rod. The dampers can constitute separately produced parts and/or specially configured and/or finished surfaces provided on the piston and contacting the housing and/or the sealing element(s). The invention also relates to improvements in the configuration and/or the material(s) of the piston.

Abstract: A handling equipment of the swingable arm type comprises a double acting cylinder within whose chamber a main piston is sealingly mounted, which is slidable owing to the selective delivery of fluid under pressure at opposite zones of the chamber, which is connected to a rod associated to the arm with a toggle joint. The equipment comprises a device for controlling the oscillation of the arm, including: a cavity of the rod having a nut screw, a screw member with a threaded shank in engagement with the nut screw, a rotatable head opposite to the rod and not slidably mounted with respect to the cylinder, and means for controlling the rotation of the screw member, associated with its head in order to brake the rotation of the screw member following to an anomalous condition in the feeding of fluid under pressure to the chamber of the cylinder.

Abstract: A connecting rod apparatus of a compressor for converting a rotation to a reciprocal sliding by connecting an eccentric portion of a crank shaft and a piston. The connecting rod apparatus has: a bush rotatably connected with the eccentric portion, and having a first connecting portion with a pair of sloping sides at an outer circumference, the sloping sides have a predetermined slope in regard to an axis of the eccentric portion; a connecting rod having a small inner diameter for being connected with a piston pin connected with the piston, the small inner diameter is formed at one end of the connecting rod, and a second connecting portion for being connected with the first connecting portion in a direction of the axis along the sloping sides, the second connecting portion is formed at another end of the connecting rod; and a connecting member for connecting the second connecting portion and the bush to be able to move by an external power.

Abstract: A vest for a human body has an air core coupled to a pulsator operableto subject the vest to pulses of air which applies and releases high frequency pressure forces to the body. The pulsator has two diaphrams connected to an electric de motor with rotary to reciprocating linear motion transmitting mechanisms 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 commmunication with the manifold chamber is used to adjust the pressure of the air in the manifold and pulsing chambers.

Abstract: The present invention provides a cylinder block which can reduce the vibrations and noises produced from the engine at high temperatures and has a light weight, as well as a method of making such a cylinder block. Specifically, the cylinder block of the present invention comprises a main body (5, 21) of the cylinder block, a bearing (11, 17) attached to the underside of the main body (5, 21), and a crankshaft supported rotatably in a bearing section (13, 25) formed by the underside of the main body (5, 21) and the bearing (11, 17). In this cylinder block, an aluminum alloy layer (33) is formed in the sliding portion of the bearing section (13, 25), the region adjacent to the aluminum alloy layer (33) consists of a composite material (35), and the coefficient of thermal expansion of the composite material (35) is lower than that of the aluminum alloy layer (33) formed in the sliding portion.

Abstract: A piston machine with at least one axially movable piston in a cylinder is designed with a force conversion mechanism implying sinusoidal piston movement by rotation of the power input or power output shaft of the machine, depending on its application. As the pistons of the machine are fastened perpendicularly to a crosshead yoke (5) at their preferably light, cylindrical piston-rods (2,2′), in which two crosshead slides (14,14′) each are provided on a crank pin journal (7,7′; 8,8′) which is synchronized to perform rotation with mutual opposite directions of rotation (indicated as arrows). This arrangement causes the crosshead slides longitudinally in the yoke to move in exact mutual opposition and to reverse their direction of movement at the exact same time. Thus, the lateral pressure on pistons is completely eliminated and without any addition of any extra balancing mechanism there may be achieved a complete outbalancing of the reciprocating and rotating masses in the machine.

Abstract: An air valve assembly is provided for a power piston in a vacuum brake booster including an input element with a hollow axial extension. The hollow axial extension includes a retaining portion. An output element is provided that includes an input extension slidably positioned within the hollow axial extension. The input extension includes an outer groove formed thereon and a ring member is disposed in the outer groove, the ring positioned adjacent the retaining portion to prevent separation of the input element and outer element.

Abstract: A Positive Fluid Displacement Device (PFDD) with single piece double-ended pistons connected to a crankpin for circular motion. Pistons are nested together to maintain all pistons in the same plane perpendicular to the axis of the crankshaft. Cylinders are driven in a reciprocating fashion by the pistons and are held loosely in a cylinder carriage along its axis with radial sealing engagement therebetween. Pliable members mount port plates within a housing such that there is no direct contact therebetween or with a two-layer manifold. A flat surface of the port plate is urged against the cylinder head by a pliable member which exerts a force on the center of the port plate. Grooves in the first layer of the manifold are sealed by the second layer to form fluid passageways. The cylinder head is guided in housing grooves with a pliable member. A sealing lip is integral with a piston head.

Abstract: A hand-held vacuum pump has a piston for drawing a vacuum. The pump has a piston rod having a piston end and a distal end. The piston end is attached to the piston. The pump further has a pivot lever having a rod end, a handle end, and a pivot interface disposed therebetween. The rod end is rotatably attached to the distal end. The pump has a pivot support having a support interface. The support interface is cooperatively sized and configured with the pivot interface to translate the rod end of the pivot lever in substantially axial movement of the piston rod.

Abstract: A bearing system for accommodating angular movements occurring during operation of a linear actuator in a lifting structure for a ladle containing liquid steel in a continuous casting installation. Annular bearings on a piston and in an end wall of a piston and cylinder assembly allow free rotation of the piston about a first axis during controlled excursions of translating motion by the piston along the cylinder. A first attachment shaft is joined by cylindrical bearings to the arms of a first clevis for only sliding rotational motion about a second axis. A second attachment shaft secured to a second clevis carries a cylindrical bearing between the clevis arms for only sliding rotational motion about a third axis parallel with the second axis. A saddle is secured to an attachment on the piston rod and having an elongated annular load-bearing surface defining a fourth axis extending along a force transmitting junction with the first attachment shaft.

Abstract: An air compressor includes a bearing engaged in a base, a weight having a pivot axle rotatably and stably secured to the casing with the bearing and having a shaft offset or eccentric relative to the pivot axle. A cylinder includes a piston rod rotatably coupling to the shaft of the weight. A gear is engaged on the weight and rotated in concert with the weight relative to the base about the pivot axle. A motor is secured to the base and has a pinion engaged with the gear for rotating the weight and for moving the piston rod relative to the cylinder in a reciprocating action.

Abstract: A hand-held vacuum pump has a piston for drawing a vacuum. The pump has a piston rod having a piston end and a distal end. The piston end is attached to the piston. The pump further has a pivot lever having a rod end, a handle end, and a pivot interface disposed therebetween. The rod end is rotatably attached to the distal end. The pump has a pivot support having a support interface. The support interface is cooperatively sized and configured with the pivot interface to translate the rod end of the pivot lever in substantially axial movement of the piston rod.

Abstract: A device is provided for splicing our joining together two rod-like elements which each have at least one end that shall be joined to a respective end of the other rod-like element, wherein the ends of the two rod-like elements are caused to face one another and are placed adjacent each other.

Abstract: The present invention aims at providing a small size air pump which has a simple structure and is less likely to incur restrictions on its space for installation and accommodation. The present invention provides a small size air pump 1 in which a motor 4 is driven to actuate a pump section 3, so as to carry out a predetermined aspirating operation; the air pump 1 comprising a worm gear 15 disposed at an output shaft 4a of the motor 4; a worm wheel 16, disposed between the motor 4 and the pump section 3, meshing with the worm gear 15; a smaller gear 18 disposed coaxial with the worm wheel 16; a larger gear 20, disposed at a position held between the motor 4 and the pump section 3, meshing with the smaller gear 18; and an actuator element 21 having one end pivotally connected to a periphery of a flat part 20a of the larger gear 20 and the other end connected to an end part of a piston 5 of the pump section 3.

Abstract: A fluid actuator attaches a hinged safety device to a vehicle and pivots the hinged safety device between retracted and extended positions. The housing of the actuator has a base and a removable cover. A sub-assembly is attached to the base. The subassembly includes a generally planar base member with integral right cylinder, lever arm pivot support and stop posts. A piston slides in the right cylinder and forms a fluid chamber between the piston and a closed end of the right cylinder that is fed through a passage through the closed end of the cylinder. A lever arm is pivotally attached to the lever arm pivot support at one end for pivotal movement between retracted and extended positions, the lever arm extending over the cylinder and having a lip at an opposite end that is spaced from the right cylinder. A pivot arm engages the top of the piston at one end and the lever arm at an opposite end to transfer motion from the piston to the lever arm.

Abstract: An apparatus includes an air compressor containing a piston in a cylinder, a flywheel having an axis of rotation, and an elongated linkage structure interconnecting the flywheel with the piston. A support member projects from the flywheel. A bearing supports the linkage structure on the support member. The linkage structure has an inner edge surface defining an opening in which the bearing is received in an installed position. The inner edge surface of the linkage structure extends continuously in a loop around the opening, and has an annular portion which is interrupted across a circumferentially extending gap. The linkage structure further has a portion configured as a living hinge which enables the gap to enlarge upon flexure of the hinge. This enables the bearing to be installed in the opening with an interference fit between a cylindrical outer surface of the bearing and the annular inner surface of the linkage structure.

Abstract: A connecting rod assembly for connecting high pressure pumps to mechanical or hydraulic pump drives has been developed. This assembly comprises a crosshead incorporating a novel design which slides on two parallel tie-rods in order to ensure precise and stabile support for moving pump components attached to the crosshead. Further, the crosshead utilizes a single centrally located drive bearing of spherical design to eliminate any torques which could otherwise be translated into the driven equipment (pumps).