Abstract: A split ring seal assembly with a slip joint including a split ring having first and second free ends and a connecting member in the shape of a ring segment having first and second ends. The split ring seal has a multiple convoluted cross section with two outer flanges. The connecting element has a U-shaped transverse cross section. The split ring seal and connecting element are designed such that the connecting element fits within the split ring seal. The first end of the connecting member is fixedly attached to the first end of the split ring seal. The second end of the connecting member is slidably received within the second end of the split ring seal. This enables the split ring assembly to expand and contract as it is exposed to varying temperatures and pressures. The connecting element is comprised of two connecting members having curved portions and integral overlapping portions which are slidable relative each other.

Abstract: An annular shaft seal of the type including a continuous lip seal element for sealing against oil flow through and between a bore and a shaft extending therethrough includes a convoluted elastomeric flexible section which connects the sealing element with a rigid case support. The flexible section is defined by a plurality of annuli, wherein the first annuli contains the sealing element which is supported from a rear body portion, both sealing element and rear body portions being integral to the first annuli. A second annulus integrally coupled to the first annulus through a reverse bend has a radial thickness less than the thickness of the first annulus. In the preferred form, the rear body portion contains an annular groove in which is supported a circumferentially extending garter spring. A pair of spaced projections extends partially circumferentially about the coil dimension of the garter spring so as to enclose at least 200.degree. to 270.degree. of the garter spring coil circumference.

Abstract: A sealing assembly suited for use in a high temperature and/or high pressure environment with a device such as a pump having a rotatable shaft. The sealing assembly comprises a sealing ring including a body portion having a flange with an end face at one end thereof, the sealing ring being adapted to be mounted on the shaft and rotatable relative thereto. A first gland is loosely mounted on the shaft adjacent the sealing ring, the gland having a first recess to receive the body portion of the sealing ring and the gland having a second recess surrounding the first recess to receive the flange of the sealing ring. The gland is dimensioned relative to the sealing ring whereby the gland is adapted to be loosely mounted on the shaft and the sealing ring for floating action relative thereto subject to the pressure of the environment.

Abstract: A drafting apparatus having a linear edge with first and second wheel means associated with the edge to rotatably move the linear edge across a planar drafting surface and wherein the wheels are of differing diameter so as to have the linear edge move across an arc defined within a circle toward which the linear edge is always pointed. The center of that circle is the vanishing point as conventionally utilized with perspective drawing techniques.

Abstract: A ring seal of the kind comprising an annular jacket (1) of relatively yieldable material with a channel containing an energizing spring to impart resilience thereto, is characterized in that the channel is of substantially part-elliptical profile and contains a partly spaced spring ring (2) of channel shaped radial profile. The spring ring comprises a pair of metal rings (2a, 2b) which have axial slits and are secured together around their outer periphery prior to insertion in the jacket channel. Additionally the spring ring may have a plane circular ring welded thereto in a central diametric plane and to this latter ring there may be secured a dual component cylindrical protection ring having its axis coincident with the axis of the ring seal.

Abstract: A ring seal primarily for sealing static mating faces comprises an annular jacket (1), which may be made of low friction plastics material, having a channel of part-elliptical radial profile. Within the channel there is accommodated an energizing spring (2) in the form of a ring of channel-shaped radial profile, there being a gap between a part (M) of the spring ring (2) and the channel to allow movement of the spring ring relative to the jacket when the ring seal is brought into use. The spring ring (2) is made from a transversely folded strip of metal with segmented side edges which is formed into a circle and then has its ends secured together.

Abstract: A piston having a ring groove therearound has a three part oil control ring in the groove. The ring includes an axially and radially corrugated expander and two flat annular rails retained by the sides of the groove. The radial wall thickness of the rails is no more than 3% of the diameter of the piston; and the radial wall thickness of the expander is no more then 4.7% of the diameter of the piston.

Abstract: A shaft seal for machines processing synthetic resin under pressure and in a plastified condition has two sealing rings that contact each other along a sealing interface running out from the shaft axis. The sealing ring that is further from the housing containing the resin has means spring loading it towards the other sealing ring.

Abstract: A bearing seal between the internal space of a centrifuge and its drive part utilizes, in a preferred embodiment, three similar sealing elements arranged in axial succession to each other and pressed against a protective bushing of the drive shaft in an elastic manner. The protective bushing of the drive shaft has a reduced diameter in the contact area of the sealing element closest to the internal space of the centrifuge, so that protective gas introduced into the space between the sealing elements and the subsequent sealing elements flows into the internal space of the centrifuge.

Abstract: An annular seal assembly which is adapted to be utilized in a vehicle air conditioning compressor. The seal assembly includes an outer annular support housing which is sealingly secured to the main body of the compressor in coaxial relationship with a rotatable shaft. An annular PTFE seal element includes an outer annular periphery sealingly secured to the support housing, and an inner annular periphery adapted to sealingly engage the rotatable shaft. In the preferred embodiment of the invention, the outer annular housing of the seal assembly is formed to include an inwardly facing annular recessed portion which is adapted to receive an annular gasket ring utilized to provide a seal between the PTFE seal element and the outer annular housing. The outer annular housing is also provided with an outwardly facing inner annular recessed portion which is adapted to receive a suitable tool for removing the seal element from the main body of the compressor.

Abstract: A self-aligning bearing arrangement has a compressible packing (20) for forming a gas-tight seal between the outer housing (2) and a rotatable shaft (10). A bushing ring (22) supports the shaft (10) and accommodates any misalignment thereof by having an inner surface (26) of convex cross section. The bushing ring (22) is urged axially against the packing (20) by a drive plate (28) and urging means (30, 32).

Abstract: An annular or linear seal having a substantially K-shaped cross section. The seal with cleft seating surface provides a two-way pressure barrier when it is installed in a groove having a cross section of "sigma" shape, wherein the flat side of the K-shaped cross section of the seal with cleft seating surface is in contact with an interface in a sliding relationship and the concave side opposite to the flat side of K-shaped cross section seats on the convex bottom of the groove with a "sigma"-shaped cross section. Of course, the seal with cleft seating surface may be used as a static seal disposed intermediate two surfaces including no movement therebetween.

Abstract: A split type sealing device for providing high pressure sealing around a cylindrical member such as a tube. The sealing device utilizes a primary flexible split seal ring element and a rigid split back-up ring, which have their splits positioned on opposite sides of the cylindrical member so as to encircle the member. The seal rings are maintained in position against high sealing pressure by a split seal retainer enclosed by mating clamping means, such as a slotted coupling member having an external threaded end and a mating conduit and ring nut. The pressure axial loading on the tube is accommodated by a split clamp ring which clamps the coupling to the cylindrical member, which is usually a tube. The seal device is suitable for sealing against internal pressures of 0-5000 psi.

Abstract: A composition of matter adapted for use as a sealing material and in fabricating bushings, rider rings and structural support pads. The composition is sintered polytetrafluoroethylene (PTFE) having uniformly dispersed therein from 5 to 50 volume percent of filler particles selected from the group consisting of glass particles and mineral particles having a Rockwell C hardness of between 10 C to 50 C wherein the filler particles are present in the polytetrafluoroethylene when the sintering occurs. Lead glass, soda-lead glass and soda-lime glass are among the filler particles which are incorporated into the PTFE to form structurally strong compositions which generate low amounts of wear debris.

Abstract: A housing for a flexible recoilable measuring tape which includes a battery operated light for emitting light directly onto the tape; a pair of magnetic foot members attached to the base of the apparatus for adhering onto metal beams or the like; and a flexible holder wherein the belt or waistband is engaged between a flexible arm and the apparatus for placement of the apparatus when not in use. There is also included a recoilable line marker attached to the side of the apparatus.

Abstract: An improved silicone rubber gasket having improved oil resistance, permeability characteristics and compressive set characteristics. The silicone rubber composition utilized is made from an organopolysiloxane gum, a silica filler, a quantity of hollow microspheres, and a curing catalyst. The polysiloxane, microspheres, and filler material are first blended to form the uncured rubber compositions. The rubber composition is then mixed with a suitable catalyst and cured in the desired shape. The microspheres are selected to have the requisite strength for being milled or mixed into the silicone rubber compound without fracturing.

Abstract: A steel piston ring comprises a base material of stainless steel, a nitrided layer covering at least the edge of the ring adapted to slide along a cylinder wall of an internal combustion engine, and an oxide film over the nitrided layer on the edge of the ring. Suitable oxide films include phosphate oxide and triion tetroxide.

Abstract: A gland seal for a dynamoelectric machine which utilizes a passage through a ring member for conducting a relatively low pressure gas between a first axial face and a second axial face of the ring member. The seal also includes a relief portion in the first axial face whereby the ring member is forced against the high pressure side of the gland seal thereby diminishing the flow of oil to the high pressure side which is desirable in a hydrogen-cooled generator system.

Abstract: A stuffing box for the reciprocal polish rod of a producing oil and/or gas well bore, the rotatable rod of a pump, or the like and comprising a housing disposed around the outer periphery of the rod and concentrically arranged with respect thereto to provide a cooling chamber around the outer periphery of the rod, upper and lower bushing members disposed in the housing and around the outer periphery of the rod for assuring an efficient axial alignment between the rod and the housing during reciprocation of the rod, annular sealing members interposed between the bushings and the rod for precluding leakage of fluid therebetween with the use of the usual packing assemblies, a charging seal provided at the lowermost bushing and responsive to pressure differentials acting thereacross for admitting fluid into the cooling chamber while precluding movement of fluid from the cooling chamber around the charging seal, a valved internal passageway provided in the stuffing box providing communication between the cooling c

Abstract: A seal for a stationary pipe connected to a housing or chamber designed for high fluid pressures. The seal comprises a generally cylindrical metal shell and an elastomeric sealing liner bonded to the inner surface of the shell. The sealing liner has two sealing zones and a gradual ramp formation for centering and guiding the pipe thereinto during assembly.