Abstract: A device for sealing the shaft of a turbo machine in which there are disposed a shaft sealing side plate attached to a casing, an atmospheric side floating ring and an in-machine side floating ring arranged in a seal case and associated with the shaft with the interposition of a small space, the atmospheric side floating ring having an atmospheric side end surface in contact with the shaft sealing side plate, the in-machine side floating ring having an in-machine side end surface in contact with the seal case; the device being characterized in that a flexible ring which is deformable in compliance with the deformation of the atmospheric side floating ring during driving is interposed between the atmospheric side floating ring and the shaft sealing side plate, whereby an excessive load is not applied between each white metal of both the floating rings and a seal sleeve, hardening and scalling loss of the white metal are prevented, and the reliability of sealing in the turbo machine is improved.

Abstract: For sealing-off a piston rod moistened with lubricating oil, for example of a 2-stroke diesel engine, several seal rings, some of which only act as wiper rings and some of which also act as seal rings for a gas-tight seal, depending on their design, are arranged next to one another in a packing casing. Each seal ring has less than three partings and consists of sectorial ring pieces made from a plastic material. On the outside, the seal ring is surrounded by a helical spring which runs around annularly and which pushes the ring sections against the piston rod by its tensile force. The ring sections are made of a plastic material, as used, for example, also in this manner for slide bearings, so that the so-called anti-seizure properties of the seal ring are significant.

Abstract: A mechanical seal for rotating shafts having a first, second and third ring member. The first ring member has a series of annular axial grooves in the internal bore and a slot extending across the grooves to an end of the first ring. The second ring member is adapted for insertion into an annular recess in the first ring member. The first and second rings have complimentary adjacent recesses for insertion of a third ring member.

Abstract: An insert for use with a sealing device having a flexible ring with a circumferentially extending channel which opens in an axial direction at one end of the ring. The channel is bounded by the ring's sidewalls which have external sealing faces engageable with the moving surfaces to be sealed. The insert is comprised of a seal-reinforcing ring having aa flat annular disk and an annular projection extending at least in one axial direction from the disk. The annular projection substantially corresponds in size and configuration to the cross-sectional size and configuration of the channel and is insertable into the channel. The disk defines radially extending seating surfaces disposed at the one end of the ring when the projection is inserted into the channel and limits the depth of the extension of the projection therein. The insert ring is designed with an axial projection extending in one direction away from the seating portion or disk or in opposite directions away from the disk.

Abstract: A valve guide seal device for the stem of a valve used in an internal combustion engine includes a seal/scraper ring retainer having an upper enlarged diameter portion supporting a scraper ring adapted to be fixed in the counterbore of a stepped valve guide bore in the cylinder head of the engine and a lower tube portion extension that projects into a fluid passage in the cylinder head, flow through which is controlled by a poppet valve that has a nominal diameter valve stem portion slidably received in the valve guide bore and in the scraper ring, and a valve stem portion with an upstanding annular bead that is slidably received in the lower tube portion extension when the valve is in its valve closed position to define therewith a gas flow barrier and which is adapted to scrape out any carbon deposits or the burnt ash therefrom during opening movement of the valve.

Abstract: A laminated expanded graphite gasket, such as an automotive head gasket, comprising a core and compressed expanded graphite facings and defining clear-through openings. A thin metallic layer is positioned on the graphite facing over less than 75% of the area of the facing for at least partial embeddment therein to enhance sealing stress in the covered portions, to improve impingment resistance of the gasket, and to improve other properties of expanded graphite gaskets.

Abstract: A blowout preventor ram seal having a reversible top seal portion and a reverisble face seal portion wherein the two portions are installed on a ram block and attached to the ram block and to each other.

Abstract: An O-ring is positioned with its inner peripheral surface in sealing engagement with a shaft and with its outer peripheral surface in sealing engagement with the wall of a cylindrical hole. When pressure is applied to the high pressure end of the O-ring, the low pressure end thereof is pressed against a radially extending retaining disc. An axially extending vent hole is formed through the outer portion of the retaining disc to permit fluid adjacent the outer peripheral surface of the low pressure end of the O-ring to escape so that such fluid cannot exert radially inward pressure forcing the inner peripheral surface of the O-ring into tight frictional engagement with the shaft. A wire ring disposed adjacent the vent hole prevents the compressed O-ring from extruding into and plugging the vent hole.

Abstract: An expansible duct seal construction for a batch mixer vessel with a cover clamped to the open end of the vessel wherein a flexible duct perimetrally surrounds the cover and the end portion of the vessel adjacent the cover, the duct being secured to the sides of the vessel and including an expansion fold around its perimeter secured to the cover in a manner to prevent the escape of vaporous material. A gas under pressure is provided in the duct to balance the pressure in the duct with the gaseous pressure in the vessel and inhibit the migration of material from the vessel in the preferred form of the invention.

Abstract: A mechanical seal assembly disposed within a pump housing for retarding the flow and leakage of fluids and other matter from being pumped along the motor drive shaft. The mechanical seal assembly of the present invention includes a non-rotating seal ring and a seal ring which rotates with the motor drive shaft. The non-rotating seal ring is resiliently mounted from the impeller side of the housing and is operably carried by the pump housing such that its seal face is urged toward the seal face of the rotating seal ring. A flexible assemblage comprises part of the non-rotating seal mounting arrangements and assures flexibility of the non-rotating seal face despite pump operating conditions.

Abstract: A joint sleeve for sealing the ends of adjacent pipe sections. Each pipe section end has a compressible sealing gasket encircling it proximate its end and a shoulder remote its end. The joint sleeve consists of a body able to encircle the pipe section ends and to compress the sealing gaskets so that an adequate seal is provided when the sleeve is disposed about adjacent pipe section ends. To resist the force imposed upon the sleeve by the rolled gasket which tends to urge the sleeve from the pipe end, the joint sleeve has an inner surface with a flared portion. When the sleeve is positioned on one pipe section end for storage and transport, the compressed gasket by virtue of the flared portion produces an axial force urging the joint sleeve body in a direction opposite the force imposed by the rolled gasket and against the shoulder to hold the sleeve on the one pipe section end.

Abstract: A sealing assembly, suitable for sealing between two relatively-slidable parts, includes a sealing ring which is housed in an annular groove in one of the parts, which is formed with two circumferential lip portions and which is formed with a circumferential landed portion disposed between those portions. Elastomeric energizing means, also in the grooves and in engagement with the sealing ring, urges the lip portions into fluid sealing engagement with the other of the parts. The landed portion is, under conditions of low fluid pressure upon the assembly, free from fluid sealing engagement with the other part but, under conditions of high fluid pressure upon the assembly, is caused to come into fluid sealing engagement with the other part to supplement the sealing by the lip portions and to share with those portions contact stresses arising on relative movement of the two parts under high applied fluid pressure.

Abstract: A pack-off (10) comprising of two metallic rings (12, 14) with a serpentine or undulating band (16) integral therewith embedded in elastomeric material (32). The lower metallic ring (14) is narrower than the upper metallic ring (12) and the serpentine band (16) and elastomeric material taper such that the narrow portion is at the lower end of the pack-off to engage and seal a tapered annulus (40) in a wellhead system. In one embodiment, the apices (20-26) of the serpentine band are curved and engage the side walls of a tapered annulus (40) to provide a combined metal-to-metal and elastomeric seal. In another embodiment, the apices (20a-26a) of the serpentine band (16) are flat to provide more metal contact with the side walls of the tapered annulus (10). The lower ring engages an abutment (52) and continued movement of the pack-off (10) deforms the band (16) and expands the elastomeric material (34) to seal the annulus (40).

Abstract: An annularly shaped elastomeric core type joint packing having a fiber reinforcement, having a radial reinforcing effect with respect to a longitudinal axis of the core.

Abstract: A three-member compound sealing means having a central elastomeric O-ring actuating plastic surrounding members on both sides. Primary seals are formed by the plastic members. These seals lie on both sides of the secondary seals formed by the elastomeric O-ring, thus protecting the O-ring from the corrosive effects of chemicals.

Abstract: A device for removing dirt and contaminants from a surface comprises a number of fibres (24) fixedly supported at one end and extending towards and engaging at a contact surface (28) the surface (2) from which the dirt and contaminants shall be removed. The fibres (24) have conveyor surfaces (32) extending obliquely in relation to the direction of relative movement between the fibres and said surface (2), said conveyor surfaces being adapted to move the dirt and contaminants away from said surface in direction transversely to the direction to said relative movement between the fibres (24) and said surface (2).

Abstract: A ferrofluid rotary-shaft seal apparatus of extended seal life suitable for use as an exclusion seal in vacuum or other demanding applications which seal apparatus comprises:(a) an annular permanent magnet adapted to surround the rotary shaft to be sealed and having poles of opposite polarity at each end; and(b) a series of spaced magnetically permeable, pole-piece elements in a magnetic-flux relationship with the one and other ends, respectively, of the permanent magnet, each pole piece having a one end and another end and adapted to surround the rotary shaft to be sealed and to form a cavity there between, the inside diameter surfaces of the stationary magnetically permeable pole piece elements comprising a plurality of spaced magnetic pole piece elements each of which acts as a separate path for magnetic flux there being ferrofluid magnetically captured between the inside diameter of each circular pole piece said ferrofluid breaching the small gap between the inside diameter of said circular pole piece and

Abstract: A seal ring has an annular sealing lip of a polymeric material which bears resiliently about a shaft rotatable relative thereto with a sealing strip and hydrodynamically acting backfeed ribs to one side of the sealing strip. An annular projection projects from the other side of the sealing strip with a radial clearance between a cylindrical or conical interior surface of the annular projection and the shaft. The annular projection is united with the sealing strip in a bending-resistant manner. Damming ribs protrude uniformally about the interior surface of the annular projection. Each damming rib has a leading surface which makes an obtuse angle with the interior surface and is parallel to the axis thereof.

Abstract: A piston-and-ring assembly includes a generally cylindrical piston, a circumferential groove provided in the piston and having a bottom and two radial flanks forming opposite sides of the groove; and an expander spring ring accommodated in the groove and including a plurality of generally radially extending tongues arranged in a circumferential series. Each tongue has, at a radially inward end, a leg portion extending at a first angle other than zero to the respective tongue from which it extends. An oil scraper annular lamina is situated in the groove and is supported axially by the tongues and is abutted radially by the leg portions. An extension forms part of each leg portion and is oriented thereto at an inclination. Each extension has a length which extends substantially from one of the flanks to the other.

Abstract: An arrangement for sealing a space having therein rotating means, such as a roller bearing, is provided with sealing rings that are spaced along a rotational axis. The inner annular sealing edges of the sealing rings are biased to engage and seal in against seats that are moving relative to the sealing edges. The seats and sealing edges are disposed so that one or the other of the latter lifts off of its seat to permit pressure within the space to equalize automatically with ambient pressure whether the latter rises or falls relative to pressure within the space.