Abstract: A mechanical seal construction employing a one-piece plastics packing ring of relatively rigid material for creating a sealed relationship between the nonrotatable seal ring and the stuffing box or gland. The packing ring has a main substantially rectangular body portion which defines an inner annular surface of substantial axial extent, which inner surface has a light interference fit with an opposed surface on the nonrotatable seal ring. A thin ringlike rib is integral with and externally surrounds the main body portion and projects radially outwardly therefrom, which rib is disposed in the axially central plane of the main body portion. This rib has the radially outer end or edge surface thereof maintained in a light interference fit with an opposed surrounding surface as defined on the gland or stuffing box.

Abstract: An hydraulically operated clutch release has an annular piston hydraulically moveable in an annular chamber. A felt ring is mounted on a shoulder of the piston away from the chamber, to engage the bore surface of the chamber, and a holding ring is snapped onto the end of the shoulder to hold the felt ring on the shoulder. An extension of the holding ring forms a seal with the bore on the chamber, and defines, with the felt ring a dust catching recess.

Abstract: A circular gasket for sealing the opening between the exterior of a sewer pipe and the interior periphery of an opening in a manhole, in which greater sealing pressure is provided by using a plurality of longitudinal openings extending entirely around the gasket through the head portion thereof which contacts the sewer pipe.

Abstract: Packing or sealing moving in a hollow cylinder.Such a device, or moving piston with self-tightening ring, comprises two elements of cylindrical external outline such as a cylindrical rod integral with the first element slides in a cylindrical chamber delimited inside a second element and facing the first element, the two elements being separated by an annular ring that ensures the packing or sealing with the internal wall of the cylinder.Such a piston allows to suppress use of mercury as pressure transmission agent.

Abstract: In a sealing device for a rolling bearing wherein the clearance between an outer race and an inner race is sealed by a sealing plate fixed to the outer race side, the sealing plate has on its inner periphery an axially extending inner lip, a radially extending outer lip and an intermediate lip extending between said two lips and having the tip end thereof divided into two directions. The inner race has on its outer peripheral surface adjacent to the end thereof a concave seal groove having an inner shoulder and an outer shoulder having a diameter smaller than that of the inner shoulder. The inner lip of the sealing plate cooperates with the inner shoulder of the seal groove to form an inner sealing portion between the inner lip and the inner shoulder. The outer lip of the sealing plate cooperates with the outer shoulder of the seal groove to form an outer sealing portion between the outer lip and the outer shoulder.

Abstract: The sealing device is intended for sealing in one direction between the cooperating surface of a cylindric cavity and shell surface of a cylindric cavity and shell surface of a spindle (3) movable therein. One or the other surface is provided with an annular groove (9), in which a sealing ring (8) is located, which is slightly movable in axial and radial direction and intended to minimize fluidum leakage in axial direction between the cooperating surfaces. The ring (8) has small cross-sectional dimensions in relations to the spindle (3) and enclosing cavity. The ring is slim but is of rigid material. The sealing surface (12) of the ring is slightly conic. The ring abuts on the radial inner surface (11) of the groove along a supporting surface, which is annular and has substantially smaller height than the cross-sectional height of the ring and is located adjacent the sealing surface. One or more grooves are located in peripheral direction about the inner surface of the ring.

Abstract: A rolling diaphragm seal is inserted between a pair of telescopic tubes containing a laser beam and a reflective mirror to preclude ambient air or lubricant from impinging on the mirror or for changing the density of the air within the tube to cause a change in intensity of the laser beam. The telescoping tube pairs can be used as part of a control system for the positioning of the beds of an ultra-precise machining apparatus such as found in turning and grinding machines for generating flat, spheric, and aspheric shapes, commonly known as aspheric generators. The rolling diaphragm seal consists of a rubber tube having its ends folded back upon itself and positioned between the inner and outer telescoping tubes of each pair. The ends of the seal tube are held apart in a retaining collar through which air can be inserted to pneumatically pressure the space between the folded back portions of the seal.

Abstract: In a shaft sealing ring including a stiffening ring having an angular profile, a lip ring with a sealing lip, an intermediate ring in the nature of a diaphragm connecting the lip ring to the stiffening ring and an elastic contact pressure element arranged to press the sealing lip resiliently against the surface of the sealed shaft, the contact pressure element is an extension from the stiffening ring protruding 40 to 80% into the cross section of the intermediate ring.

Abstract: A compound sealing ring for fluid couplings comprises an annular resilient seal member having front and rear ends between which extends a circumferential annular groove, and an annular rigid reinforcement member inserted over the front end of the sealing member in snug engagement in the groove. The reinforcement member is axially confined by the sidewalls of the groove and has sufficient rigidity to prevent radial outward deformation of the sealing member during use.

Abstract: A wave-form carpet layer's template used for cutting the edges of pieces of carpeting in matching wave-form patterns preliminary to sewing the side edges together in a substantially invisible seam. The template comprises a flat, rigid strip of structural material having two legs arranged substantially at right angles to each other. The inner and outer side edges of both legs have uniform wave-form contour, the crests of the inner side edges being opposite the valleys of the outer side edges. The width of each leg is substantially equal to one-half the wave length of the wave-form contour. The apex of the two meeting outside edges is located in the crest portion of one of the side edges and the valley portion of the other of the side edges.

Abstract: A seal assembly for effecting a seal between a stationary housing and a rotatable cylinder includes a plurality of arcuate segments radially disposed about the outer circumference of the cylinder. Each segment has an axial sealing surface defining a radius approximately equal to that of the rotatable cylinder and additionally has an end section for overlapping adjacent segments thus creating a gap and radial interface between the adjacent circumferentially disposed segments. The sealing assembly additionally comprises means for sealing the gaps formed by the adjacent overlapping segments, apparatus for tensioning the segments radially about the outside circumference of the cylinder and studs for removably attaching each segment to the housing while concurrently permitting radial displacement of each segment independently from its adjacent segments.

Abstract: A rotating seal assembly for a continuous flow centrifuge is described. The seal assembly permits both elements of the rotating seal, the rotating member as well as a nonrotating member to be resiliently mounted and in such a manner that both may rock as necessary to accommodate the vibrations of the other. Furthermore, the drive for the rotating member is decoupled so that greater freedom of movement for the rotating member is afforded.

Abstract: A cylinder-head cover gasket being inserted to the sealing groove with a wedge shaped space defined by two plates of a cylinder-head cover has a upper projecting portion, which is engaged with the wedge shaped space of the sealing groove. The whole space of the groove is filled with the gasket, so that the gasket does not run off to the wedge shaped space, resulting in the improved sealing.

Abstract: Means of sealing off the inside of a pulverizer, especially a bowl-mill pulverizer that has a horizontal rotating bowl-type grinding ring rigidly connected to a shaft, from the outside atmosphere. The means comprise a barrier-air chamber and ring seals in a ring-seal holder. The ring seals are slide rings that fit into grooves. They demarcate the barrier-air chamber. The ring seal on the side of the chamber that faces the inside of the pulverizer does not fit as tightly against its opposing surface (the shaft in one embodiment) as those on the other side.

Abstract: A shaft seal system is disclosed for isolating two regions of different fluid mediums through which a rotatable shaft extends. The seal system includes a seal housing through which the shaft extends and which defines an annular land and an annular labyrinth both of which face on the shaft so that each establishes a corresponding fluid sealing annulus. A collection cavity is formed in communication with the annular sealing spaces, and fluids compatible with the fluids in each of the two regions to be isolated are introduced, respectively, into the annular sealing spaces and collected in the collection cavity from which the fluid mixture is removed and passed to a separator which separates the fluids and returns them to their respective annular sealing spaces in a recycling manner. In the illustrated embodiment, the isolated fluid mediums comprise a liquid region and a gas region.

Abstract: Hot-box signalling devices are disclosed for indicating the presence of overheated bearings in vehicles such as rail cars. The device includes means defining a closed compartment containing a fluid and pressure-sensitive means communicating with the compartment. The compartment is arranged in thermal communication with a bearing of the vehicle so that increases in the temperature of the bearing cause increases in the pressure exerted by the fluid. The pressure-sensitive means is adapted to produce a signal when the pressure exerted by the fluid exceeds a predetermined threshold representing an over-temperature condition in the bearing. Preferably, the pressure-sensitive means takes the form of a plug normally closing an opening in the compartment, and a marker material, the plug and marker material being expelled when the pressure in the compartment reaches said predetermined threshold. In one aspect of the invention, provision is made to compensate for ambient temperature.

Abstract: A seal between co-rotating, opposed annular surfaces of interconnected elements comprises a multi-filament wire rope disposed within an annular groove formed at the interface between the two surfaces, the groove being wedge-shaped in cross-section, one side of the wedge being formed by each element. The wire rope is forced into sealing relationship with the groove surfaces along its entire length by centrifugal forces. The multi-filament wire rope has improved sealing capability over solid, single filament wire seals of the prior art. The seal is particularly well suited for use in the hot turbine section of a gas turbine engine and is resistent to damage and failures due to multiple engine cycles.

Abstract: In a seal device in a displacement measuring instrument, comprising a hollow case fixed to one member, a connecting rod for imparting a displacement of the other member to a displacement detecting mechanism housed in the hollow case through the opening and seal members disposed at opposite sides of the opening, for shielding a penetrating portion of said connecting rod, to enhance the drip-proof performance, a difference is given between the positions of the forward ends of lip members constituting said seal members, whereby the forward end of the lip member disposed at one side where liquid drops are generated is projected farther than the forward end of the lip member disposed at the other side, and/or a liquid receiving groove extending along the opening is provided at least at one side of the inner surface of the hollow case, liquid drain holes are formed in the bottoms of the liquid receiving grooves, filters for excluding dust intruding from outside are provided in the liquid drain holes, and/or liquid

Abstract: A weatherproof and/or dust proof fitting including a cover attached to a housing and adapted to pivot from an open position to a closed position where a sealing means in the cover or housing seals an opening in the housing, the arrangement being such that the cover is biased to its closed position so that a latching means formed in association with the cover or the housing automatically closes to lock the cover over the opening in the housing.

Abstract: A three part split shaft seal assembly is disclosed which is particularly adapted for use in an overhung steam turbine. In one embodiment the assembly is located between the shaft opening of the turbine case and a horizontally split shaft bearing case. To facilitate axial insertion and removal of the assembly, the seal assembly is formed from three pairs of split ring seals. Proper axial alignment is maintained by stand-offs or dowel pins located between two of the split ring seals. In one embodiment a snap ring received within an annular groove in the turbine housing holds two of the seal rings against axial movement. In that embodiment set screws carried in one ring seal are used to seat and align two ring seals of the assembly relative to the turbine casing. A pin holds two of the ring seals against relative rotational movement. In another embodiment, a split spacer ring is used to maintain correct spacing and the third seal is used to position and hold the other two seals axially aligned to each other.