Abstract: A hydraulic cylinder includes a cylinder assembly defining a cavity; a piston rod having an inboard end and a rod axis; a taper lock piston assembly including a piston head with a central bore and a head axis, and wherein the inboard end includes a first exterior tapered portion having a first non-zero cylinder taper angle and the central bore defines a piston tapered portion having a non-zero bore taper angle that is the same as the first cylinder taper angle; and wherein the piston head is received on the inboard end with the first exterior tapered portion in circumferential abutment with the piston tapered portion.

Abstract: A plunger of a fuel pump is disclosed. The plunger may have a cylindrical base configured for axial movement and rotation within a pump barrel. The plunger may also have a fuel amount controlling end. The fuel amount controlling end may have a recessed surface region. The fuel amount controlling end may also have a sealing surface region. Further, the fuel amount controlling end may have a control interface connecting the recessed surface region with the sealing surface section in a radial direction. The transition from the recessed surface region to the control interface may be curved.

Abstract: A pneumatic component includes a cylinder, a piston running in the cylinder, and a grooved ring. The grooved ring seals the piston from the cylinder, and has a static side and a dynamic side. The static side of the grooved ring has at least two concentric microlips.

Abstract: A seal valve arrangement is provided for a hydraulic device (10). The hydraulic device has an inner bore (14). The seal valve arrangement includes an element (45) disposed in the bore. The element is constructed and arranged to define a fluid passage (47) so fluid can move from one side thereof to a side opposite the one side. An elastomer seal member (39) is adjacent to the fluid passage and to a seal portion (r) of the element. A spring member (41) biases the seal member to engage the portion (r) to maintain sealing of the fluid passage under certain fluid pressure conditions, and under different fluid pressure conditions, permits the seal member disengage from the portion of the element to open the fluid passage. A tipping point is disclosed as a point when a fluid pressure condition alone causes the seal member (39) to fully engage the portion of the element and fully seal the fluid passage.

Abstract: A piston-chamber combination comprising an elongate chamber which is bounded by an inner chamber wall and comprising an elastically deformable piston comprising a container in said chamber to be sealingly movable relative to said chamber at least between first and second longitudinal positions of said chamber, said chamber having cross-sections of different cross-sectional areas at the first and second longitudinal positions of said chamber and at least substantially continuously different cross-sectional areas at intermediate longitudinal positions between the first and second longitudinal positions thereof, the cross-sectional area at the first longitudinal position being larger than the cross-sections area at the second longitudinal position, said piston including a piston body and sealing means supported by the piston body being designed to adapt itself and said sealing means to said different cross-sectional areas of said chamber during the relative movements of said pistion from the second longitudinal

Abstract: A piston packing has a mounting surface and a seal surface. The seal surface and the mounting surface are fitted with a head and an annular groove portion, respectively, of a piston.

Abstract: A piston assembly for a double-acting engine such as a double-acting Stirling engine. A pair of sealing rings located on opposite sides of a sealing washer are positioned between a base section and a dome section of a piston head. These sealing rings are alternatively urged into sealing engagement with the cylinder bore as the piston reciprocates. A single sealing ring design is also disclosed in which the sealing ring is urged into constant sealing engagement by positive pressure accumulated with an interior cavity in the piston head.

Abstract: A piston (6) for a tool dispensing a mass from a foil bag (5) includes an axially extending piston rod (8) engageable with a central engagement part (14) of the piston and arranged to be pressed against the foil bag (5). A wipe-off edge (15) at least partially encircles and is located radially outwardly from the central engagement part (14). The wipe-off edge (15) is axially displaceable for a limited extent relative to the central engagement part (14).

Abstract: A compressible seal member is provided with peripherally distributed and axially spaced lubricant retaining grooves, or with radially extending lubricant channels in communication with a central lubricant reservoir. The sealing member has land portions and groove portions on the outer periphery, with the lubricant grooves or channels located along the groove portions. The seal member is installed within a pharmaceutical container with the tool having a working end received within a central aperture formed in the seal member so that the insertion forced is applied near the bottom end of the seal member to prevent compression during installation. When the pharmaceutical is expelled from the container, a plunger pushes on the accessible end of the seal member to compress the seal member axially and force the lubricant out of the grooves or channels and into contact with the inner wall surfaces of the container.

Abstract: A dispenser for flowable materials, such as toothpaste, includes a hollow barrel in the form of a tube open at its lower end and closed at its upper end with the flowable material being inserted in the tube. A plunger which is also in the form of a hollow tube having a closed upper end, is telescopically arranged in the barrel. A seal is effected by a hinged peripheral rim on the outer surface of the piston near its upper end. The flow of the material forces the peripheral rim to pivot into sealing contact with the inner surface of the barrel.

Abstract: A continuous seal ring member fitted in a ring groove of a piston of a compressor. The seal ring member has a washer-like initial shape with an internal diameter smaller than an outer diameter of the piston, whereby the inner peripheral portion of the seal ring member is expanded when the seal ring member is fitted in the ring groove. The outer peripheral portion of the ring seal member is then axially and inwardly collapsed relative to the inner peripheral portion thereof so that one of the side surfaces of the initial seal ring member constitutes an outer sealing surface for engagement with the cylinder bore and the outer peripheral portion in the original shape is arranged on the side of said compression chamber.

Abstract: My invention is a down hole pump that operates on hydrostatic pressure. The mandrel is a tubular member having perforations therein. The expandable tube made of high quality plastic surrounds the hollow mandrel covering the perforations, thereby forming a means for communicating hydrostatic pressure existing within said hollow mandrel on an upstroke of said pump to expand the expandable tube. There is a plurality of special expandable rings which surround the expandable tube. The expandable tube causes the rings to expand radially with the expandable tube so as to maintain constant contact with the barrel. There is also a plurality of expandable spacers surrounding the expandable tube between each of the expandable rings which have a significantly smaller outside diameter than the expandable rings. There are also means provided to secure the expandable tube, rings and spacers to the mandrel.

Abstract: A valve plug assembly for use in a steam throttle valve includes a valve body and a removable guide ring attached to one end of the valve body. An outer edge portion is removed from the guide ring at the interface with the valve body so that a circumferential groove is defined about the valve plug when the guide ring is assembled to the valve body. A slot is formed in one wall of the groove, preferably in the guide ring, and a wear ring inserted in the slot. The wear ring extends above the wall surface and terminates in an angled bearing surface. A pressure seal ring is formed with a mating bearing surface and is placed in the groove prior to assembly of the valve plug. The angular taper on the mating bearing surfaces causes some retraction of the pressure seal ring in response to sudden valve plug movement in the closed direction.

Abstract: A seal assembly is disclosed for installation in an annular groove having inner and outer radial surfaces interconnected by an axial surface. The seal assembly is comprised of a generally annular energizer element formed of an elastomeric material and including a body portion and a generally radially extending sealing lip. The seal assembly further comprises a generally annular heel bearing element formed of a generally rigid material. Upon installation of the energizer element and heel bearing element into the annular groove, an annular void, generally triangular in cross section, is formed between the two seal elements. Upon the application of pressure at or above a predetermined pressure limit, the energizer element moves into the annular void drawing at least a portion of the sealing lip into the groove to reduce the axial width of the sealing lip contact area.

Abstract: A hand operated pump for liquids including dirty water and the like, which includes a cylindrical chamber having a foot valve at its lower end and reciprocal plunger including a rod mounted slidably in the upper end of the cylindrical chamber. The plunger includes a rod and a bellows of flexible sheet material including a generally circular central portion which is attached at its center to the end of the rod. A plurality of legs extending radially from the central portion are also attached to the rod a short distance from its end, so that the bellows can fill with liquid and expand radially to engage the interior of the chamber sealingly as the plunger moves up, and leaving the bellows free to collapse radially inwardly against the rod as the plunger moves downward within the lift chamber.

Abstract: An improved ringless piston construction having particular use in a closed fluid system. The piston includes a metal core, which is attached to a piston rod, and a resilient outer member is secured to the core and is formed from a material, such as nitrile rubber. The outer member includes an outer peripheral surface and at least one of the axial ends of the outer surface is provided with a tapered lip. The resilient outer member also includes an inner flange that is spaced radially inward of the base of the lip, and the lip and flange, in combination, define an annular recess having outwardly diverging walls. When subjected to fluid pressure, the lip will be deformed outwardly into sealing engagement with the inner wall of the cylinder, while the flange acts to deflect the fluid toward the lip to increase the sealing pressure.

Abstract: There is provided a height adjustable rubber pot bearing for supporting or lifting bridges. The pot bearing has an elastomer plate for transmitting and lifting or lowering loads wherein pressurized fluid is introduced between the bottom of the pot and the elastomer plate to displace the elastomer plate. A narrow slot is provided extending around the plate a small distance from and parallel with the inner side of the pot. The slot opens downwardly and has a depth of three-fourths of the plate thickness. A circular cylindrical insert is provided in the slot consisting of two parallel strips joined at their top edge with a space between them, the bottom edges of the strips being angled at right angles to form edge strips extending parallel with the bottom in opposing directions.

Abstract: A sealing ring device is provided for a fluid valve having a piston (2) reciprocating within a cylinder (1), wherein the piston (2) includes a valve cone (2c) adapted to contact a valve seat (11). In order to seal the inner space of the cylinder (1) located behind the piston (2) from an inlet/outlet passageway (A), a resilient sealing ring (5) is disposed in an annular groove (4) opening into the cylinder (1) around the rear end (2a) of the piston (2). A press ring (7), which extends above the rear end (2a) of the piston (2), contains the sealing ring (5) in the annular groove (4). A spring element (8) rests on the press ring (7). A piston rod (3) is guided in slidable manner through the piston (2). A stop (9) is attached to the rod (3) above the rear end (2a) and opposite the top side of the spring element (8).

Abstract: This invention provides a seal mechanism between two mating surfaces by means of a progressively, but not necessarily uniformly, decreasing clearance gap between said two surfaces for the flow of leakage of liquid and which gap may change as a function of the pressure of the flow.

Abstract: An improved piston-and-cylinder arrangement has a pressure-balanced piston head mounted on an actuator rod. The piston head is mounted for axial movement with the rod, and for radial movement relative thereto. Three annular ring-type seals are provided between facing cylindrical surfaces of the piston head and rod. The frictional impediment to radial movement of the piston head relative to the rod is minimized, and the improved device exhibits a reduction in the average maximum longitudinal frictional force per stroke.

Abstract: A height adjustable pot bearing is provided having a pot, a steel cover plate and an elastic plate of substantially incompressible elastomeric material disposed in and completely filling the pressure chamber defined between the cover plate and the pot. A circumferential slot is provided in the base of the elastic plate radially inwardly from the outer wall of the plate so that a circumferential lip is formed. The pressurized fluid supplied to the pressure chamber of the pot bearing presses against the base of the elastic plate to lift the elastic plate and the cover plate and forces the circumferential lip radially outwardly against the wall of the pot to seal thereagainst.

Abstract: The pressure accumulator (10) comprises a cylindrical housing (12) having a bore (14) with a piston received slidably therein. The piston (30) has an H-shaped cross section and includes a reduced diameter portion (34) extending longitudinally along the piston (30), and a sealing device (36, 38) disposed at each end of the reduced diameter portion (34). A cylindrical sleeve (44) is received in the reduced diameter portion (34) such that each end of the sleeve (44) abuts a respective sealing device (36, 38). The housing (12) has an exterior circumferential groove (20) with an O-ring (26) therein, and a radial opening (22) extending between the circumferential groove (20) and bore (14).

Abstract: In a radial piston machine, there is provided an outer stator and an inner rotor rotatable on a control pintle provided with supply and discharge channels. The rotor contains at least one radial bore in which is slidable a spherical piston comprising an outer ball and an inner cylindrical sleeve. The radially inward end of the sleeve, which end is adapted to be acted upon by the outlet pressure of the machine, includes a sealing lip which, during operation, in particular at higher pressures, expands circumferentially and, under certain circumstances, moves in sealing abutment with the inner wall of the radial bore.

Abstract: The mandrel of a fluid lift plunger carries pads retracted from a tube string by the continuous bias of collapsing springs. A control rod is displaceable relative to the mandrel causing a change in the force of detent springs which exert a continuous radially outward bias on the pads. In the detent held position assumed by the control rod during upward plunger travel, a higher detent spring force is exerted on the pads to overcome the collapsing springs and hold the pads in wiping contact with the tube string.

Abstract: A reduced impact piston assembly including a cylindrical body with a cavity formed therein and having a cross-bore formed therethrough which intersects the cavity. The cross-bore receives a piston pin which has an exposed intermediate portion aligned with the cavity for attachment of a connecting rod thereto. A wide groove is formed about the outer circumference of the cylindrical body which has its center aligned with the center of the cross-bore. Positioned within this groove are a pair of C-shaped inserts, the legs of which abut the ends of the piston pin to prevent axial movement of the pin within the cylindrical body. The C-shaped inserts cooperate with the pin to form a closed loop having a circumferential length which is larger than the circumferential length of the cylinder body. In addition, a portion of each of the C-shaped inserts is in constant contact with a cylinder wall.

Abstract: A cylinder housing has a piston projecting from one end thereof for forming a longitudinally expandable ram. One end of the cylinder housing has a base and the projecting end of the piston has a head whereby upon engagement of the base of the cylinder and the head of the piston between the top and bottom of a backcut provided in the tree, the tree can be felled by expanding the ram. The engaging surface between the end of the piston and its head comprises a slidable concave-convex surface engagement to allow relative movement of the head on the piston as the tree falls. The head is held on the piston but capable of its relative sliding movement by a resilient cord connected between it and the base of the cylinder. The piston is hollow to reduce the weight of the unit and employs a novel seal between it and the cylinder.

Abstract: A cartridge for containing and dispensing caulking compound comprises an elongated tubular member, generally cylindrical in configuration, one end of which has a fixed end wall including a dispensing opening therethrough and a spout attached to the end wall, while the other end of the tubular member is closed by a resilient, annular, floating member slidably mounted within the tubular member. The floating member is impervious and is made of a flexible material. When employed in conjunction with a standard caulking gun of the plunger type, the force of the plunger bears directly on the floating member which thereby expands in diameter and decreases in width and transmits pressure to the caulking for dispensing. When the plunger is suddenly withdrawn, the expansion of the floating member effectively absorbs the pressure forces within the cartridge thereby minimizing the amount of undesirable leakage of the caulking from the cartridge.