Abstract: A combined steel oil control ring is provided which has steel side rails and a steel spacer expander. The spacer expander includes ear portions for contacting the side rails. The ear portions are substantially equally spaced with respect to each other along the internal circumferential portion of the spacer expander. The ear portions have radially external circumferential surfaces adapted to press the side rails radially outwardly by using the resilient force caused by the spacer expander. The spacer expander has up-and-down contours formed circumferentially along the radially external circumferential surface, for preventing the side rails from circumferentially rotating relatively to the spacer expander. The up-and-down contours each include at least two axially extending groove regions and at least three axially extending flat regions. The groove regions and flat regions are dimensioned to extend the life span of the contours and the dies.

Abstract: There is provided a sealing device (10) for a unitised grease-or oil-lubricated package bearing assembly comprising a twin outer race (14) and two inner races (15, 16) arranged next to each other on a shaft (12), with their faces abutting. Typically, oil may be present between the said shaft (12) and the bore surfaces of the bearing inner races (15, 16), for the purpose of lubricating parts of the system adjacent to the bearing, but not the sealed, lubricated bearing itself. The scaling device comprises a substantially annular sealing portion (26) and the provision of a step (29) in the abutting face of one of the inner races such that a substantially rectangular-section groove (30) is created on the outside diameter of the abutting inner races (15, 16).

Abstract: A gasket made of nickel, nickel alloy or stainless steel has a sealing face to be engaged by a knife-edge of a joint part. The gasket is cut to form a concave groove, a stepwise reduction in thickness or a sloping cut-out at the sealing face. The sealing face is protected from contact by an adjacent higher land portion. During processing, the gaskets can be stacked or carried on a rest. Any contact occurs at the land portion rather than at the sealing faces, which are protected by the land portions from contact. Dents or scratches in the sealing faces are prevented.

Abstract: The invention is a single-piece seal assembly comprising an annular seal body. A retainer is positioned at a first end of the seal body. A rotable seal is concentric with the retainer and has a notch positioned on an inner diameter of a first face of said rotable seal. In the notch is positioned a single shim. The shim is of a length such that it is capable of providing a selected seal compression. An annular bellows having first and second ends is affixed to an inner diameter of the seal body. On the first end of the bellows is a ring holder. The ring holder holds a ring seal.

Abstract: The object of this invention is to provide a structure of seal ring, and seal structure using the seal ring for flange joints of composite tanks and pipes, that prevents seal surface variations due to differences in thermal contraction between the seal ring and the tank/the flange joint, etc., that improves the resilience of the seal, and that prevents gas leakage due to poor sealing, in order to achieve the stable sealing. The seal ring fits into a ring groove formed in a sealed unit such as a tank unit or a flange joint to provide a tight seal to contain fluids. The heart-shaped seal ring has three curved surface areas that smoothly flow together, comprised of a first curved seal surface which contacts the formed surface of the ring groove, a second curved seal surface which contacts the seal surface of a second member (e.g. manhole cover), and a projecting curved surface on the opposite side.

Abstract: There is provided a gasket comprising a sealing portion and a deformation stopper portion. When the gasket is placed between adjacent surfaces to be sealed of two objects, the sealing portion is engaged by the adjacent surfaces. The deformation stopper portion is engaged by the adjacent surfaces of the objects when the sealing portion has been deformed by a predetermined amount by the adjacent surfaces, thereby preventing excessive deformation of the sealing portion.

Abstract: A mechanical seal for mounting to a stationary housing that contains a rotating shaft is provided. The mechanical seal employs an inboard mounted spacer element to provide axial and radial spacing between a holder and a gland. In addition to providing selected axial and radial spacing, the spacer element promotes or enhances fluid circulation in a process chamber formed between the gland and holder by rotating about the shaft.

Abstract: A castor assembly for supporting a load such as an article of furniture so that it can easily be moved in any desired direction. The assembly includes a load-bearing base member from which a vertical axle is projected. Pivoted on this axle is a swivel frame, while mounted below the frame on a horizontal axle is a ground-engaging caster wheel. Also mounted on the swivel frame is at least one support roller which engages the base member. The position of the roller on the swivel frame is such as to minimize the moment of force developed between the vertical axle and the caster wheel, thereby protecting the assembly from the adverse effects of excessive loads and impact forces.

Abstract: A multiple shaft seal arrangement positioned between a shaft and an inside diameter surface of an aperture in a wall. The multiple shaft seal arrangement has a flinger attached to the shaft with a face seal mounted to the flinger. A double lip oil seal is mounted to the inside diameter of the aperture. The flinger is positioned such that the face seal is pressed against the double lip oil seal. Accordingly, rotation of the shaft causes rotation of the flinger and face seal. This centrifugally throws contaminants, such as particulate matter, away from the aperture. The void between the face seal and the inside diameter of the aperture is filled with grease or similar substance. The combination of these elements greatly prohibits debris, moisture, particulate matter or other environmental elements from passing from one side of the multiple shaft seal arrangement to the other.

Abstract: The present invention provides elongated moldings in which the occurrence of unintended curves is prevented and which can be installed while accurately conforming to the shape of the installation area. The molding body (121) of the elongated molding (120) provided by the present invention is formed by joining, in at least some parts in its longitudinal direction, two or more plastic molded members having mutually different mold shrinkage rates; in at least some parts of the molding body consisting of said two or more plastic molded members, two or more curved areas (120a, 120b, and 120c) having mutually different curvatures are formed adjacently to each other in the longitudinal direction; and the configuration within the cross section of the two or more plastic molded members, which can be seen in the cross section of the molding body, varies between two adjacent curved areas among said two or more curved areas.

Abstract: An improved combustion gasket is disclosed incorporating a self-energizing combustion seal flange. The flange includes at least one valley that serves to redistribute combustion explosion forces acted upon the gasket during operation of the engine to provide improved combustion sealing and to extend flange life.

Abstract: In a ferrofluid seal that supports a pressure differential between a low pressure side and a high pressure side, a reservoir is created between a first seal stage at the low pressure side and its adjacent seal stage. The volume of the reservoir is relatively large compared to the volumes of the interstage areas between the other seal stages. In addition, a controlled leakage path bypasses the first stage from the reservoir to the low-pressure area. The leakage rate through the bypass path is controlled so that gas in the reservoir leaks to the low-pressure area relatively slowly, for example, the bypass path might equalize the pressure across the first stage over a five-minute interval. This arrangement prevents a seal stage burst from disgorging a large gas volume into the low-pressure side.

Abstract: A dual seal assembly for providing a seal between a reciprocating rod and the gland is described. The dual seal includes first and second axially adjacent annular seal elements. The first seal element is constructed of a material having a different hardness than the material forming the second seal element. The first and second seal elements each include a seal edge contacting the rod to provide a respective seal between the first and second seal element and the rod. At least a portion of one of the first seal element and the second seal element engages the gland to form the seal between the rod and the gland. By varying the hardness of the materials forming the seal elements, the first seal element and the second seal element can be configured to provide different functions within the dual seal assembly and can cooperatively provide an effective fluid seal under a wide range of operating conditions.

Abstract: A sealing assembly is provided for sealing retractable opposing planar surfaces of processing modules each having sealable cavities for the fabrication of semiconductor wafers. The sealing assembly may include an inner frame adapted to be concentrically positioned within a central opening of an outer frame. The outer frame may include lifting tabs attached to an upper portion such that the lifting tabs are graspable to removably position the sealing assembly between the opposing planar surfaces of the processing modules. An O-ring, which may include an elastomeric material, is adapted to fit about a circumference of the inner frame. The opposing surfaces of the processing modules define an opening therebetween which accepts the sealing assembly. The opposing surfaces of the modules are retractably movable towards one another thereby coupling the O-ring between the opposing planar surfaces to provide a seal.

Abstract: An injection molded gasket has a longitudinally extending gasket body with laterally opposite sides and a plurality of longitudinally spaced retention nubs projecting laterally outwardly of the body from the opposite sides. At least one longitudinally extending ingate rib is formed on the gasket body and bridges at least two adjacent retention nubs. The ingate rib has a trimmed edge that extends outwardly of the body no further than that of the retention nubs located adjacent the ingate rib.

Abstract: A high pressure seal consists of a minimal convex excess which induces a plastic-elastic deformation on the flat opposing surface. The excess can also be formed by means of a ring with a circular cross section which after tightening of the screw coupling likewise forms a small convex excess. Removal of the ring without damage is accomplished by application of pressure by means of a smaller additional groove and a pressure feeding bore discharging into the additional groove.

Abstract: In a gas turbine having a chordal hinge seal between an inner rail of each nozzle segment and an annular axially facing sealing surface of a nozzle support ring, a supplemental seal is disposed between the support ring and inner rail of the nozzle segment on a lower pressure side of the chordal hinge seal. The supplemental seal comprises a segmented annular composite tubular woven compliant seal disposed in a cavity along a sealing surface of the inner rail of the segment. The seal bears against the annular sealing surface of the nozzle support ring, which compresses the seal. Because of the compliant nature of the seal, a supplemental seal is formed on the low pressure side of the chordal hinge seal.

Abstract: A face seal assembly is provided having an annular seal body mounted in an axially moveable relationship to a seal support structure. A piston ring is disposed between the annular seal body and the seal support structure forming a secondary seal. A first locator spring, which is an annular wave spring, is disposed between said seal support structure and the piston ring to urge the piston ring in an axial direction. Optionally, a second locator spring, also a wave spring, may be disposed between the piston ring and the seal support structure for urging the piston ring in a radial direction.

Abstract: A packing segment for an annular seal ring assembly for use in a hot gas path of a turbomachine, includes a sealing face mounting a plurality of axially spaced sealing teeth; a necked-in center portion radially outward of the sealing face; and a mounting portion radially outward of the center portion. At least one steam feed hole extends angularly from a radially outermost face of the segment to a location along a side of the center portion such that, in use, at least a portion of the feed hole is exposed to hot gas in the hot gas path for flow through the feed hole to a cavity behind the segment.

Abstract: An over-molded gland seal for producing both a fluidic seal and a fluid conduit. The apparatus includes a substrate having an elastomeric layer over-molded thereon and an elastomeric gland seal molded into the over-molded layer. Another aspect of the apparatus includes a host-part having a raised wall thereon, said host-part receives the elastomeric gland seal and compresses the gland seal with the raised wall. The substrate, the gland seal, and the host-part define an enclosed region. To form the fluid conduit, the apparatus includes a fluid inlet port and a fluid outlet port that communicate with the enclosed region.