Abstract: A piston for an internal combustion engine which is coated for enhanced oxidation protection and/or erosion protection is provided. The piston includes a body formed of an iron-based material. The iron-based material is coated with a superalloy and manganese phosphate. The superalloy is preferably NiCrAlY, NiCrAl, NiCr, CoCrAly, and/or CoNiCrAlY. The manganese phosphate can be disposed on the superalloy, but not between the superalloy and the iron-based material. The superalloy preferably has a thickness of 0.1 to 2.0 mm, a porosity of 1% to less than 5%, and a surface roughness of less than 5 microns Ra. Another component for an internal combustion engine which is coated with the superalloy and the manganese phosphate is also provided.

Abstract: A piston for an internal combustion engine is provided. The piston includes a piston body of steel and including a crown portion, a pair of skirt portions and a pair of pin boss panels. The crown portion has an upper combustion surface, a lower surface having an undercrown surface area and an outer annular ring belt with at least one ring groove. The pin boss panels depend from the crown portion and extend in spaced relationship with one another between the skirt portions. Each pin boss panel includes a pin boss having a pin bore, and the pin bores are aligned with one another for receiving a wrist pin. Each pin boss panel also has at least one recess located vertically between the associated one of the pin bores and the crown portion to increase the undercrown surface area for improved cooling of the crown portion.

Abstract: A Stirling cycle machine. The machine includes at least one rocking drive mechanism which includes: a rocking beam having a rocker pivot, at least one cylinder and at least one piston. The piston is housed within a respective cylinder and is capable of substantially linearly reciprocating within the respective cylinder. Also, the drive mechanism includes at least one coupling assembly having a proximal end and a distal end. The linear motion of the piston is converted to rotary motion of the rocking beam. Also, a crankcase housing the rocking beam and housing a first portion of the coupling assembly is included. The machine also includes a working space housing the at least one cylinder, the at least one piston and a second portion of the coupling assembly. An airlock is included between the workspace and the crankcase and a seal is included for sealing the workspace from the airlock and crankcase.

Abstract: The present invention relates to a cartridge for holding liquid, paste-like or powdered compounds and a piston for closing such a cartridge, and a system made up of such a cartridge, comprising a tool (15), wherein the piston comprises a cylindrical or cylindrical tube-like base member that can be placed into a cartridge and moved along the cylindrical longitudinal axis inside a cartridge, wherein at least one sealing lip (12) is provided that seals against a sealing surface running parallel to or at an acute angle with respect to the cylindrical longitudinal axis, wherein the sealing lip is arranged such that by way of a tool that can be accessed from an end side of the piston, the sealing lip can be lifted off the sealing surface when the cartridge is closed by the piston so that air can escape from the cartridge.

Abstract: A system for injecting a predetermined amount of a secondary fluid into a primary fluid stream uses a liquid additive injection pump driven by a fluid powered motor driven by the primary fluid stream. The liquid additive pump has a reciprocating piston movable within a cylinder between upstroke and downstroke positions to meter the secondary fluid and a piston sealing mechanism comprising spaced-apart distal and proximal sealing elements. The distal piston-sealing element is flared in the direction of piston downstroke and the proximal piston-sealing element is flared in the direction of piston upstroke.

Abstract: A light weight piston for an internal combustion engine is disclosed that minimizes the stresses found in a transition area between the piston head and the associated piston pin bosses while maintaining a flexible soft connection between the piston skirts and the piston head. The piston includes a pair of piston skirts having tapered edges. Flared connecting walls are provided such that the distance between the connecting walls is minimized adjacent a pair of piston pin bosses and the distance between the connecting walls is maximized adjacent a portion of the tapered edges. The connecting wall flares in a generally outward direction such that at least a portion of the inner surfaces of the connecting wall has a generally convex curvature.

Abstract: A damper mechanism for attenuating vibrations having a vibration attenuating spring element (1) which includes: a leaf spring (2) having a bent portion (4) and a pair of lever portions (5) extending from both ends of the bent portion (4); and an elastic member (3) disposed between the lever portions (5). When the leaf spring (2) is subjected to compressive forces, the lever portions (5) and the elastic member (3) are elastically deformed. Internal friction is generated in the elastic member (5). The functions typically provided by a conventional elastic member and a conventional resistance generating mechanism are realized by utilizing a simple spring element composed of the leaf spring (2) and the elastic member (3).

Abstract: In order to improve the guidance of a light-metal piston for an internal combustion engine of a motor vehicle by obtaining a uniform behavior under different stresses of the pressure and/or counter pressure side of the piston skirt, the wall thickness of the piston skirt is made different in the region of its pressure and/or counterpressure regions from that in its other regions. In the pressure and counterpressure regions, there is a thickening on the inner side of the piston skirt which is gradually reduced from the lower edge of the skirt in a central plane in the piston length and pressure/counterpressure direction back to the normal thickness.

Abstract: In an impact drilling apparatus, an impact hammer is provided that includes a body portion and a piston head on the body portion. The piston head has a larger outer periphery than the body portion. The body portion and the piston head have substantially the same cross-sectional area at all points along a longitudinal axis of the hammer. The piston head is disposed at one end of the body portion and is funnel-shaped.

Abstract: An improved wobble-type piston and rod assembly wherein the assembly includes a conical or infundibularly shaped piston that is capable of withstanding non-axial stress and strain forces induced by reciprocation of the crank shaft ring. An apex of the infundibularly shaped piston is attached to the ring. The piston can be attached to the crank shaft ring by means of a plurality of axial ribs, the ribs flaring outwardly from the apex of the piston to the ring. Alternatively, the piston can be attached to the ring by means of a flattened beam with two ribs/fins that flare outwardly within the plane of the beam. The piston rod assembly is formed as a unitary body.

Abstract: Seal for maintaining gas-tight contact between casing wall and, particularly, automatic well swabs. The seal includes an upper portion containing a reinforcing tube and being minimally less in diameter than the casing interior, a tapering midsection and a lower skirt portion contacting the well casing. Also included is a secondary embodiment with an upper portion being substantially less in diameter than the casing interior and reinforcing ribs in the tapering midsection.

Abstract: A piston for internal-combustion engines, reinforced at least at either the shoulder of the skirt or the piston boss thereof by a composite reinforcement consisting of a layer of inorganic long filaments and a layer or layers of inorganic staple short fibers or whiskers. The inorganic filaments are one or a combination of any of carbon, graphite, alumina, silicon carbide and glass, while the inorganic staple fiber or whiskers are silicon nitride whiskers, mineral fibers, potassium titanate whiskers, carbon fibers or graphite fibers, or a combination of those whiskers and/or fibers.

Abstract: A fluid motor and more particularly a fluid motor having an improved piston head structure.