Abstract: A semicircular packing comprising a metallic portion and an elastic portion sealing the pierced hole of the cylinder head when setting, having thick portions at both ends of auricules and a thin portion between thick portions at both ends, at least on the metallic portion partly contacting with the outer surface of the pierced hole. This semicircular packing is easily conformed to the curved peripheral surface of the pierced hole and makes it unnecessary to coat it with sealing liquid as well as able to permit the clamping torque of the cylinder head to be small and yet maintain its sealing state over a long term of years without being subjected to excessive or premature aging.

Abstract: Shaft sealing for a materials processing rotor at the juncture of the rotor's shaft with its surrounding machine housing. The sealing apparatus includes a seal stator carried on the machine housing and through which the shaft of the rotor extends. A seal impeller, having a plurality of elongated, oblique impeller vanes forming its perimeter, is carried on the rotor shaft within the seal stator. Fluid restraining means extends between the machine housing and the rotor shaft, at a location outboard of the seal impeller, to provide a fluid dam, and fluid injection means extends from the exterior of the machine housing to a position between the fluid restraining means and the seal impeller.

Abstract: An improved O-ring groove for a sealing member, the groove being formed in the sealing surface of the member, the groove in cross-section having an outer portion communicating with the sealing surfaces and an inner portion, the inner portion being of width greater than the outer portion, the juncture of the inner and outer portions providing opposed ledge surfaces, the cross-sectional area of the groove inner portion being greater than that of the outer portion and a gasket preferably in the form of an O-ring received in the groove substantially filling the groove inner and outer portions and normally extending slightly beyond the sealing surface.

Abstract: An improved seal system for the bell and spigot joint of a concrete pipe. The seal includes a bell sealing ring and a spigot sealing ring, each constructed of plastic material which when the spigot is received in the bell form a compression seal which will withstand substantial internal pressure without leaking. The ring members include, respectively, outwardly directed and inwardly directed ridges or flanges which are embedded in the respective bell and spigot ends of the concrete pipe. The spigot end ring, however, includes a central concave depression which extends into the concrete and receives an O-ring, and a lower depending flange also embedded in the concrete forming the spigot end. The joint of this invention then forms a reinforced concrete pipe capable of withstanding substantial internal pressure at least up to 50-60 pounds per square inch.

Abstract: A panel edge gasket is disclosed comprising a compressible sealing portion, attachment means for attaching the sealing portion to a panel edge, and a flexible wing carried by the attachment means.

Abstract: A high temperature valve stem packing incorporates a plurality of graphite seal rings composed of spirally coiled graphite tape and metal packing adapter rings being interposed between respective ones of the graphite seal rings. The metal packing adapter rings are of such configuration as to cause structural deformation of the end surface portions of the graphite rings to thereby induce the graphite seal rings to maintain the sealing capability thereof in response to wear during use and in response to fluid pressure applied thereto. In one form of the invention, the packing adapter rings are of solid construction and in another embodiment, the adapter rings are composed of pairs of interfitting rings which cooperate to define packing rings that are capable of yielding in spring-like manner as mechanical force or pressure induced force is transmitted to the packing assembly.

Abstract: Sealing structure (10,110) for a sealing a first joint member (11,111) to a second joint member (12,112) across a variable space therebetween. The sealing structure includes a frustoconical Belleville spring (17,117) and an annular support spring (18,118) defining an arcuate cross section having one end (19,119) connected to the Belleville spring, and an opposite end (20,120) sealingly mounted to the first joint member (11,111). A seal element (21,121) is fixed to the Belleville spring and has a lip portion (22,122) projecting into dynamic sealing engagement with the second joint member (12).

Abstract: A seal for a movable shaft which extends from a cavity within a high-pressure vessel maintains a uniform gap between the shaft and the seal body at high pressures to form an effective seal while providing adequate clearance between the shaft and the seal body to prevent excessive wear.

Abstract: A shaft rotatably mounted within a housing. The shaft extends through a pair of annular seal elements one of which is mounted on the shaft for rotation therewith. The other seal element is associated with the housing and is stationary relative to the shaft. The seal elements have respective mating surfaces which rub together during rotation of the shaft. One seal element is composed of relatively hard material, and the other seal element is composed of relatively soft material so that the mating surface of the latter is conformed to the mating surface of the former when the two mating surfaces are initially rubbed together. There is a minute gap between the mating surfaces, and this gap contains a film of liquid which acts as a lubricant. Both seal elements are composed of a material which will not support an electrochemical reaction, e.g., an electrically insulating material, to prevent electrokinetic corrosion of the mating surfaces when the film therebetween is an electrolytic liquid.

Abstract: A seal for a thrust shaft in a body wherein the body has a bore and a counterbore, the bottom of the counterbore providing a shoulder for the thrust force of the shaft. The seal includes a bearing sleeve which is slidably mounted on the shaft, the bearing sleeve having a static O-ring which seals the interior of the sleeve to the shaft and a flange which extends into the counterbore. Provision is made for radially fixing the bearing sleeve to the shaft. A ring-shaped seal housing is mounted about the shaft below the bearing sleeve and extends into the counterbore, the seal housing having an interior dynamic O-ring sealing the housing to the shaft and an exterior static O-ring which seals the housing to the counterbore.

Abstract: In order to provide a metal-to-metal annular seal for use in a high pressure environment typical of a wellhead assembly that is provided on a high pressure, high temperature gas well, especially circumferentially between the outside surface of a tubular part and the inside surface of a relatively massive part, where these parts are to have a fixed longitudinal position relative to one another in use: the available strength for developing the seal are determined; like tapering surfaces are provided on the two parts such as would provide an allowable interference fit when the two parts are brought to the fixed longitudinal position; portions of the outside surface of the tubular part are machined-away to leave tapered land areas, e.g. in two axially closely spaced bands, so that when the two parts are forced to assume the fixed longitudinal position, the seal bands provide an elastic seal that avoids total plastic deformation yet provide the required unit loading.

Abstract: A mechanical face seal including a non-rotable member fixed to a container and a rotatable member fixed to a shaft. The rotatable member includes a laminated holder constructed of press-fitted, metallic bands, and a non-metallic insert press-fitted in the holder. The outer band is in tension and the inner band in compression upon assembly of the holder so that the stresses in these parts tend to balance one another. Upon assembly of the insert to the holder, the inner band may be in tension.

Abstract: A water guard for use in a rolling mill wherein the neck of a roll is rotatably supported in an oil film bearing contained in a bearing chock, with a seal assembly located between the roll end face and the bearing chock to retain oil in the bearing and to exclude contaminants such as cooling water, mill scale, etc. from the bearing. The seal assembly includes a circular seal end plate fixed relative to the bearing chock at a location surrounding a flexible seal mounted on the roll neck for rotation therewith. The water guard is circular and it has a radially extending mounting flange integrally joined at its inner edge to an angularly outwardly extending sealing flange. The mounting flange is adapted to be surrounded by and to be secured to the seal end plate, and to provide the sole means for supporting and maintaining the sealing flange in frictional contact with the roll end face.

Abstract: An oil seal system for the shaft of a turbocharger has an oil-trapping chamber formed by an oil thrower, thrust metal, and seals arranged so as to prevent the leakage of the lubricant into the blower.

Abstract: A mechanical face seal which includes a non-rotatable seal ring and a rotatable mating ring biased into rubbing engagement. The non-rotatable seal ring is disposed in a stationary housing and is axially biased toward the rotatable mating ring which is fixed to a rotatable shaft. An anti-rotation member is pressed into the housing and is engageable with the non-rotatable seal ring to prevent its rotation while allowing axial movement thereof.

Abstract: A resilient gasket having an outer annular flange positioned within a manhole opening and maintained thereagainst under compression by means of a compression band. The gasket is provided with a central opening defined by an enlarged beaded periphery having an elasticity adapted to tightly encircle the outer periphery of the pipe. A folded intermediate section is arranged between and integrally joined to the outer flange and the beaded inner periphery, the intermediate section is comprised of first and second diagonally aligned annular portions integrally joined along a fold to define a V-shape which imparts a yieldability enabling the gasket to maintain a watertight seal between the manhole opening and the pipe, even in the presence of a significant misalignment therebetween. A strap is positioned about the intermediate section of the gasket adjacent the inner beaded periphery to enhance the watertight seal between the gasket and the pipe.

Abstract: An annular elastomeric seal-ring construction having a body adapted for stabilized retention in a circumferential seal-ring groove in one of two relatively rotatable members and for circumferentially continuous resilient contact with an opposed wiping surface of the other member. The resilient wiping contact is established via an integral rib of width less than body width, wherein the locus of the rib undulates axially as a function of azimuth about the axis of the ring body.

Abstract: A sealing element adapted to be disposed in a slitshaped, preferably annular gap, comprises an internal gas-filled cavity with an inlet in one end and an outlet in the other end for a hardening filling medium adapted to be introduced into the cavity under pressure so that the cavity is filled and the element is expanded so that the gap is sealed. The outlet (15) is connected to a closed chamber (14) adapted to receive the gas which is driven out of the cavity (2) in the flexible element when the cavity is filled with filling medium (16), so that the displaced gas can be compressed in the closed chamber (14') and exert a counter pressure on the filling medium (16') in the sealing element while the filling medium is hardening.

Abstract: A retraction seal (32) for a disc brake is disposed within a caliper groove (34). The retraction seal (32) cooperates with a forward wall (42) of the groove (34) to define a space (72) which substantially prevents the retraction seal (32) from engaging a radially inner edge (80) of the forward wall (42) during braking, thereby preventing nibbling of the retraction seal (32).

Abstract: A seal (16) is positioned to prevent entry of foreign matter through an annular opening (26) between first and second members (12,14). The first and second members (12,14) are, for example, a stationary backing plate (20) and a rotatable hub (22) of a brake assembly (24) or a rotatable shaft and associated housing element. Foreign matter passing between the backing plate (20) and the hub (22), for example, can enter an associated brake drum (30) and interfere with effectiveness of the brake assembly (24). Apparatus (72) connects the seal (16) to the backing plate (20). The seal (16) has first and second legs (38,40) each having a sealing surface (58,60). The sealing .[.surface.]. .Iadd.surfaces (58,60) .Iaddend.contact a face (68) and outer surface (66) of the hub (22), respectively, to substantially block passage of foreign matter to the brake drum (30).