Abstract: A tandem-type pneumatic brake booster, in particular for hydraulic vehicle brake systems, having a housing comprising a first and a second housing half shell, the interior of which is divided with the aid of a partition into a front and a rear booster chamber, wherein the partition has a centrally arranged, circular cavity, through which a control housing or a cylindrical control housing extension extends, and the partition rests sealingly against the control housing or the control housing extension by a sealing element, having a first and a second movable wall, which respectively subdivide the front and the rear booster chamber into a first low-pressure chamber and a first working chamber and into a second low-pressure chamber and a second working chamber, having at least one connecting conduit between the first working chamber and the second working chamber in order to equalize the pressure between said two working chambers.

Abstract: A central release unit for a hydraulic clutch actuator has a plastic cylinder housing which is produced by injection molding and which has at least one cylinder wall provided, on an outer circumference, with a reinforcement sleeve. The reinforcement sleeve can be fastened to the cylinder wall after the injection molding of the cylinder housing, for which purpose a snap-action connection is provided on a forward end, which faces away from the pressure connection piece, of the reinforcement sleeve. The connection is formed by a radially inwardly bent detent portion of the reinforcement sleeve and by a rib integrally formed on the outer circumference of the cylinder wall. The reinforcement sleeve has a main portion which adjoins the detent portion and which is of conical shape complementary to an outer circumferential surface, which is of conical form in the reinforcement region, of the cylinder wall.

Abstract: A reciprocating compressor is provided. In one embodiment, a reciprocating compressor frame includes a central body and at least two crosshead guides extending from opposite sides of the central body. Additionally, the compressor frame crosshead guide support structures extending outwardly from the central body along a respective crosshead guide. Other embodiments of compression systems, devices, and frames of such systems are also provided.

Abstract: A brake stud housing assembly and method of construction of such assembly for vehicles that exhibits increased shock resistance and vibration reduction capability, allowing for increased durability of a brake housing assembly. The housing assembly includes a vibration dampening layer having an adhesive material that provides a permanent connection between the housing shell and reinforcing plate, which transfers both tensile and compressive loading forces between the housing shell and reinforcing plate in order to reduce vibration and stress.

Abstract: Oilfield equipment is provided that includes a base material less subject to abrasion, corrosion, erosion and/or wet fatigue than conventional oilfield equipment materials such as carbon steel, and a reinforcing composite material for adding stress resistance and reduced weight to the oilfield equipment.

Abstract: Evaluation results are shown in Table 1. The embodiments 1-9 possess a high thermal conductivity and high bonding strength. However, the thermal conductivity has dropped in the comparative examples 1, 2 and 4 with a low surface area ratio and in the comparative example 3 with a high surface area ratio. The comparative example 2 with a low projection height has a low bonding strength, and the comparative example 3 with a high projection height has a drop in the thermal conductivity. The thermal conductivity has declined in the comparative example 1 with relatively few projections, and the thermal conductivity has declined in the comparative example 4 with many projections. The comparative example 5 with no projections and having a rough casting surface does not have sufficient bonding strength.

Abstract: A dove-tail clamp assembly configured to couple a plunger and a pony rod for operation within a fluid end. The clamp assembly using a flange portion extending from the plunger and the pony rod. A clamp within the clamp assembly engages the flanges in the plunger and the pony rod in a non-threaded relationship to permit the pony rod to induce a reciprocating movement of the plunger within the fluid end. The flange portions may be integrally coupled to the plunger and the pony rod in one embodiment. In another embodiment, the flange portions may be threadedly inserted into existing bores in the plunger and the pony rod. The clamp assembly may include a deflector and an alignment pin.

Abstract: A protective tube arrangement for a piston-cylinder unit includes a substantially disk-shaped carrying cap and a protective tube which has axially projecting crenellations and free portions formed between the crenellations. First and second axially acting securing elements axially fix the protective tube to the carrying cap by positive engagement. Each of the securing elements is formed by a wrapped binding element which is wrapped around the protective tube over the crenellations and tightened between the crenellations over the free portions so that the binding element defines secant segments through the indentation of the imaginary contour of the protective tube between the crenellations in the free portions of the protective tube, which secant segments form a positively engaging arrangement for the carrying cap.

Abstract: A fluid end for a reciprocating pump is provided that includes a base material less subject to abrasion, corrosion, erosion and/or wet fatigue than conventional fluid end materials such as carbon steel, and a reinforcing composite material for adding stress resistance and reduced weight to the fluid end.

Abstract: A reciprocating compressor is provided with a reciprocating compressor frame which includes a central body and at least two crosshead guides extending from opposite sides of the central body. Additionally, the compressor frame has angled crosshead guide support structures extending outwardly from the central body along a respective crosshead guide.

Abstract: A pneumatic brake booster with a booster housing is subdivided into at least one working chamber and at least one vacuum chamber by means of at least one axially movable wall capable of being acted upon with a pneumatic differential pressure. An actuable input member includes a valve piston, with an output member for acting upon a brake master cylinder with an output force. A control valve is arranged in a control housing and can be actuated by the valve piston for controlling the differential pressure. An elastic reaction element is arranged in a control housing recess and against which the output member bears. Means for setting a distance z between the valve piston and the reaction element are provided on the output member.

Abstract: A downhole pump for a well has a barrel and a plunger. The barrel has a passage extending along the length of the barrel, with the passage having an inside diameter. The plunger has an outside diameter and is received by the barrel passage for relative reciprocal movement. One of the barrel or the plunger is equipped with wear rings, with a wear ring at one or at each end. The wear rings are made of a material that is harder than the material of the respective plunger or barrel. The wear rings provide protection from abrasion, particularly in a sandy well.

Abstract: The invention relates to a lifting ram for lifting platforms, in particular for underfloor lifting platforms, comprising an inner tubular body and an outer body which is at least partially tubular and which at least partially surrounds the inner tubular body, wherein the outer tubular body and the inner tubular body are connected to one another at least in a force-fitting manner via connecting elements. The lifting ram is an extruded element at least in some sections.

Abstract: An engine cylinder liner is provided. The engine cylinder liner includes a first liner end, a second liner end, and an inner surface extending between the first liner end and the second liner end. The engine cylinder liner also includes a first outer surface between the first liner end and a first outer surface end portion, and a second outer surface between the second liner end and a second outer surface end portion. The second outer surface end portion is closer to the first liner end, than the first outer surface end portion is to the first liner end. The engine cylinder liner further includes an inclined shoulder surface portion between the first and second outer surface end portions.

Abstract: A fuel injection pump is provided. The fuel injection pump includes a barrel including an inner surface defining a bore. The fuel injection pump also includes a plunger movable inside the bore of the barrel. An outer surface of the plunger and the inner surface of the barrel form a clearance therebetween. One or more sleeves at least partially encircle one or more portions of an outer surface of the barrel, and are configured to apply a load to the outer surface of the barrel.

Abstract: In order to safely and conveniently assemble and service new design spring brake actuators having power springs located in the middle of the actuator, the actuator's rear chamber cover must be able to withstand high localized forces from tools such as power spring compression rods. A reinforcement and method for its installation is provided, in which a plurality of reinforcement plates is stacked on the rear chamber cover about a tool-insertion aperture, and the outermost plate is crimped about the aperture, thereby securing the plates to the rear chamber cover in a cost- and time-efficient manner. Preferably, the lip of the rear chamber cover aperture is stamped when the cover is formed such that the lip protrudes axially outward to help assure that the lip is captured between the crimped reinforcing plate on one side and the remaining reinforcing plates on the other side.

Abstract: The invention concerns a method of mounting a cylinder arrangement of a hermetically enclosed refrigerant compressor arrangement in a carrier arrangement (14, 15), in which the cylinder arrangement is inserted in the carrier arrangement (14, 15), aligned in relation to a crank shaft (5) and connected to the carrier arrangement (14, 15). It is endeavoured to ensure a good efficiency of the refrigerant compressor arrangement. For this purpose the carrier arrangement is deformed, before inserting the cylinder arrangement, by means of a calibration cylinder (40), until the calibration cylinder (40) has a predetermined alignment, after which the calibration cylinder (40) is removed and replaced by the cylinder arrangement in the carrier arrangement (14, 15).

Abstract: A cylinder for high-pressure hydraulics is disclosed, with a cylinder sleeve extending between a cylinder base and a cylinder head composed of an inner tube and an outer sleeve made from fiber-reinforced plastic placed on the inner tube. According to the invention, a weight reduction without loss of rigidity may be achieved, whereby the inner tube of the cylinder sleeve screwed to the cylinder base and joined to the outer sleeve in a thrust-resistant or shear-resistant manner engages with the cylinder head in a tensile-resistant manner.

Abstract: An aircraft brake piston housing (10) has a composite body (14) including a plurality of fibers embedded in a matrix, the body (14) including a central bore (18) and a plurality of circumferentially disposed openings (23) surrounding the bore (18), at least some of the circumferentially disposed openings (23) being configured to receive a brake piston (26), and a frame (12) embedded in the composite body (14) and formed from a material different than the matrix. Also a method of forming such a brake piston housing.

Abstract: Disclosed is a high-pressure generation apparatus, which comprises a pair of columnar-shaped anvils disposed in opposed relation to one another to define a pressure-generating space therebetween. The anvils are adapted to be applied with a load therebetween to generate a high pressure in the pressure-generating space. Each of the anvils has a top portion formed in an approximately circular truncated cone shape, and the top portion has a central region formed with a depression having a side surface which extends obliquely outward. The high-pressure generation apparatus also includes a cylindrical capsule disposed in a central area of the pressure-generating space, and a laminated member formed by alternately laminating a doughnut-shaped metallic thin plate and a doughnut-shaped insulating member along the outer periphery of the capsule. The improved shape of the depression makes it possible to significantly reduce damages of the components.

Abstract: A linear hydraulic motor (12) includes an elongate cylinder (26) and at least one piston (34) slidingly located inside the cylinder. The piston (34) has a longitudinally extending portion which fits with clearance in the cylinder and which describes a path in use which penetrates an interior zone of the cylinder which extends radially inwardly from an aperture in the cylinder wall. An internal reinforcing member (300) is slidingly located inside the cylinder to travel with the piston. The reinforcing member describes a path in use which also penetrates said interior zone of the cylinder which extends radially inwardly from the aperture in the cylinder wall and the reinforcing member has portions which are concentric and radially aligned with circumferentially spaced portions of the cylinder wall that are on opposite sides of said aperture in the cylinder wall.

Abstract: A pressure vessel of the present invention is such that at least part thereof comprises a metallic composite material 40 comprising alight metal 41, which is turned into a matrix, and a plateshaped iron-basedmember 42, which is buried in the light metal 41, whose major component is iron, and which is provided with a large number of through holes penetrating the front and rear surfaces. By means of this construction, it is possible to provide a pressure vessel having a novel construction whose pressure resistance is enhanced without being accompanied by thickening, and a compressor being provided with a housing comprising the pressure vessel.

Abstract: Disclosed herein is an air conditioner compressor for a vehicle, which comprises a friction member mounted replaceably on the inner wall of the cylinder bore in which the piston reciprocates so as to come in contact with the friction member. The present air conditioner compressor may further comprise a spring member disposed between the outer circumferential surface of the friction member and the inner wall of the cylinder bore. The present invention provides an advantage that it is possible to remanufacture worn cylinders simply by replacing friction members.

Abstract: A fluid end for a reciprocating pump is provided that includes a base material less subject to abrasion, corrosion, erosion and/or wet fatigue than conventional fluid end materials such as carbon steel, and a reinforcing composite material for adding stress resistance and reduced weight to the fluid end.

Abstract: A tie rod (40) for mounting a booster and the brake control master cylinder on a bulkhead (3) of the vehicle engine compartment. The tie rod (4) comprises, at each of its ends, a shoulder (43, 44) defining a bearing surface having a frustoconical shape. Each shoulder is situated in such a way that a narrow part of its frustoconical surface is near a threaded part (41, 42) used to secure the booster and is located inside of the booster in such a way that each frustoconical surface is in contact with a corresponding frustoconical hole (81, 82) in a wall of the booster.

Abstract: A composite material and framework structure adapted to be utilized as a piston and cylinder apparatus. A cylindrical tube composed of a composite material is compressed between two end caps at the axial ends of the cylindrical composite tube. Beam elements extend between the end caps and maintain the compression force on the cylindrical composite tube. The cylindrical composite tube comprises a continuous glass fiber reinforced structure embedded in a resin matrix. The resin matrix provides a self contained lubricant system in a resin rich layer, the lubricant system migrating to the inner surface of the cylindrical composite tube.

Abstract: A face wall for a motor vehicle comprises a first wall and a second wall that is disposed at a distance from the first wall. The first wall is provided with a recess for accommodating a brake booster that is fastened exclusively to the first wall. This assembly permits effective soundproofing in the area of the face wall, thereby increasing comfort during driving.

Abstract: A fluid actuator having a honed metallic sleeved inner liner assembled with fitted end caps. The inner liner and end caps are wound with carbon reinforced fiber filaments in both longitudinal and hoop orientations so as to withstand increased fluid pressure over traditional metallic designs. The fluid actuator of the present invention is lightweight and had an extremely stiff piston and rod assembly, which may also be fabricated from high flexural modulus composite materials so as to allow for a very stiff, lightweight, hydraulic cylinder which is particularly resistant to column buckling at long extensions and comprises an economical, non-rebuildable design.

Abstract: A first and second tie rods locating between a front shell and a rear shell of a brake booster through which a master cylinder is connected to a support member. Each of the first and second tie rods have a head that engages the rear shell and a first shaft that extends from the head in a first direction along a first axis through the front shell and the flange and a second shaft that extends from the head in a second direction offset from the first shaft along a second axis through the rear shell and the support member. Fasteners are secured to the first, second, third and fourth shafts such that the front shell and rear shell are compressed between the flange and support member and forces are transmitted into the support member without creating a moment that would change the axial alignment of the first and third shafts.

Abstract: A master cylinder body and a die for molding the master cylinder body which is unlikely worn out by a flow of the melt and improves the life duration of the die. A rib provided from a first outlet port projected from right external peripheral surface of the master cylinder body to an end portion of a front end portion via a second outlet port is formed deviated from a line connecting a central axial lines of the first and the second outlet ports. Likewise, a rib provided from the first outlet port formed on a left external peripheral surface of the master cylinder body to the end portion of the front end portion via the second outlet port is formed deviated from the line connecting the central axial lines of the first and the second outlet ports.

Abstract: A tandem vacuum booster includes a rear housing mounted to the vehicle, and a front housing mounted to the rear housing to define an interior chamber. A divider, disposed between the housings, partitions the interior chamber into primary and secondary chambers. A primary diaphragm, disposed between the rear housing and the divider, partitions the primary chamber into a primary high pressure chamber and a vacuum chamber. A secondary diaphragm, disposed between the divider and the front housing, partitions the secondary chamber into a secondary high pressure chamber and a vacuum chamber. A tie rod extends between the housings and through the chambers. A sleeve is disposed about the tie rod and extends between the high pressure chambers and is spaced from the tie rod. This sleeve defines a passage between the tie rod and itself such that air can be transferred between the high pressure chambers.

Abstract: The present invention relates to a pneumatic brake force booster with means for fastening the said to a vehicle wall which extend through the interior of the brake force booster, wherein a fixed stop for a first housing part is provided on a first end and a stop that is adjustable by means of a rotation for a second housing part is provided on a second end, and with means for the pneumatic sealing of housing openings for the fastening means. The gist of the present invention resides in that the fastening means has a smooth sealing portion adjacent to the adjustment area of the adjustable stop, and in that the sealing means, by multilateral abutment on a conical abutment surface of the adjustable stop, on the smooth sealing portion and the associated housing portion, closes a slot between the fastening means and the adjustable stop and a slot between the stop and the housing part. This achieves a simple and low-cost sealing of housing openings for the fastening means.

Abstract: A drive cylinder comprising a cylinder barrel (3) extending between two cylinder heads (2a and 2b) and a plurality of ties (13) distributed about the outer periphery of the cylinder barrel (3) and bracing the cylinder heads (2a and 2b). Of these of ties at least one is constituted by a profile part (26) which extends in the peripheral direction (14) of the cylinder barrel (13) some distance along its outer periphery and whose profile provides means for the implementation of at least one additional function.

Abstract: The invention relates to a high-pressure device (1) having a cylindrical high-pressure vessel (3) and prestressing means in order to exert an axial pressure on the vessel. The vessel (3) can have been formed from a number of layers of composite material, such as glass, carbon or aramide fibers which are oriented in the peripheral direction and are embedded in a matrix of epoxy resin or polyurethane. By applying the axial prestress to the pressure vessel (3), the tangential stress is distributed more uniformly over the wall thickness of the high-pressure vessel (3), the stress decreasing at the inside of the wall and increasing at the outside thereof. As a result, the innermost fibers of a high-pressure vessel (3) made of composite material are subjected to appreciably less stress, which has a beneficial effect on the life of the high-pressure vessel (3), and all fibers of the wall are utilized effectively.

Abstract: The description relates to an actuator for use at high and low temperatures, with a cylinder block (8), a piston (14) movable therein and a piston rod (22) secured to the piston. A first and a second flange cover (46, 48) and a sleeve (40) in the cylinder block (8) in which the piston (14) can move to and fro are made of ceramic. The piston rod (22) is secured to the piston (14), also of ceramic, by a head bearing (24) movable transversely to the longitudinal axis of the piston. The seal between the piston (14) and the sleeve (40) is provided solely by a close fit, without the need for additional sealing components. The low thermal expansion of the ceramic components used also means that the tolerances change little even at great temperature fluctuations. The radial head bearing (24) prevents the piston (14) from jamming during forces transverse to the longitudinal axis of the piston possibly arising at the piston rod (22).

Abstract: An arrangement by a piston-and-cylinder unit, comprising a cylinder member (1) and a piston member (2), movable therein, to which a piston rod (4) is connected. The cylinder member consists of a barrel pipe (7) and closure portions (6) at each end (5) of the cylinder member, the closure portion at one end exhibiting a bush (8). The bush is provided with a through bore (9) for the piston rod (4) and is enclosed by an end portion of the barrel pipe, said end portion being bent radially inwards, towards the piston rod and over a first circumferential surface (16) of the bush. The bush (8) is provided with a collar portion (14), exhibiting an external second circumferential surface of the bush, enclosing the circumference of the piston rod and extending axially beyond the inwardly bent portion.

Abstract: A booster 4 and a hydraulic pressure master cylinder 5 are disposed so as to be inclined upward of a vehicle body by an angle &thgr; with respect to a line L2 extending along the longitudinal direction of the vehicle body. The front surface plate 4c of the booster 4 is provided at the upper side of the vehicle body with the low strength portion 9. A first notched portion 10f is provided at the upper side of the reinforcement plate 10 so as to open at the outer peripheral edge thereof. The lower side of the reinforcement flange 10b of the reinforcement plate 10 is partially removed to form a second notched portion 10g. When external force is applied to the hydraulic pressure master cylinder 5 from the front direction of the vehicle body, the low strength portion 9 and the first and second notched portions 10f, 10g serve to easily incline the hydraulic pressure master cylinder 5 to the upper direction of the vehicle body.