Abstract: Improved piston shaft seals for end-of-car hydraulic cushioning devices. Comprising an improved combination of annular oil scraper seals, and improved annular reinforced oil scraper seal, for use in an end-of-car hydraulic cushioning device.

Abstract: A sealing body for a pipe connection bonded chemically and/or mechanically to a fixation part being attachable to an end portion of a socket pipe. The fixation part consists of plastic material or of reticulated elastomer.

Abstract: A two element, high and low pressure seal assembly to be used in a hydraulic or pneumatic sealing environment between two relatively movable machine parts, the seal assembly comprising a spring element, circular or rectangular in cross-section and made of a relatively soft elastomeric material, and spring element being substantially contiguously surrounded along all but a small exposed area and contained within an annular slot of a house-shaped elastomeric annular sealing member whereby an integral assembly is formed for easy installation and unitary response. The house-shaped sealing element comprises a central body from which two anti-extrusion legs radially extend. The legs are located fore and aft of the spring element within an annular peripheral groove in one machine part and are disposed perpendicular or radial to the axis of said machine part.

Abstract: A magnetic fluid seal provided in a sealing gap defined between an inner surface of an outer rotor and the outer periphery of a disc-shaped magnet includes magnetic liquid situated in the sealing gap and the improvement wherein the inner surface of the outer rotor is inclined so that in a cross-section through a plane containing the axis of rotation of the rotor, the inner surface forms an angle with the axis of rotation of the rotor whereby retention of the magnetic liquid in the sealing gap is facilitated by the reaction forces to the centrifugal forces acting on the magnetic liquid during operation.

Abstract: Sealing sleeve of a polymeric material of low elasticity and with at least one connecting sleeve for the liquid-and/or gastight connection to a connecting stub wherein the connecting sleeve has an inner circumference which is smaller or larger than the outer circumference of the connecting stub, wherein the connecting sleeve has a folding extending substantially non-parallel to the circumferential direction and is thus adaptable to the diameter of the connecting stub.

Abstract: This invention relates to a belleville seal for a sealed bearing rotary cone rock bit. The inner static ring portion of the annular belleville seal is metal and is interference fitted over the base of a journal bearing. The separation joint formed between the inner diameter of the static ring portion of the belleville seal and the outside diameter of the journal bearing is circumferentially welded using a high-energy beam source to form a hermetically sealed metallurgical bond therebetween.

Abstract: A drafting machine has fixed parallel top and bottom rails (R-1,R-2) and a center rail (R-3) which is movable perpendicularly along the fixed rails and has a carriage (4) carrying a protractor head (6) which in turn carries a straight edge assembly (2) including two mounting bars (30,40) perpendicular to one another and each having a reference scale (52) and an adjustable scale (54). The mounting bar (40) is movable along the mounting bar (30) and has an X-axis straight edge (64). A Y-axis straight edge (62) is movable along the mounting bar (40). Fine adjustment mechanisms (80) are provided on the center rail (R-3), the carriage (4), the mounting bar (40), and the Y-axis straight edge (62), which operate with racks (144,145) along the top and bottom rails (R-1,R-2), a rack (152) on the center rail (R-3), and racks (84) on the mounting bars (30,40). The fine adjustment mechanisms (80) may be readily disengaged.

Abstract: A novel seal means is positioned between two coupled mechanical parts rotating about a pin, the pin being connected to one part and rotating within a bushing connected to the other part with pin and bushing. The seal means comprises an elastic load ring of relatively soft material and a seal ring of "L"-shaped cross section made from tough abrasion resistant material and having at least two seal projections engaging the bushing for retaining lubricant and for preventing dirt from adversely affecting the operation of the seal means. In one embodiment, a hard back up ring, made for example from metal or rigid plastic, is supported in an annular seat in the seal ring for reinforcing the seal ring. The seal means may be employed as end face seals in a track joint for an endless chain for a crawler tractor.

Abstract: A fluid seal unit for high pressure sealing applications. The seal has a rigid casing and an annular elastomeric sealing lip body which includes a primary seal band contacting a shaft in sealing engagement when the fluid in the sealed region is under a first pressure. The air side surface of the lip body also has auxiliary sealing ribs and fluid retaining grooves of progressively increasing diameter. When the pressure in the sealed region increases, one or more additional ribs will contact the shaft to provide increased seal band contact area and to entrap additional fluid near the shaft.

Abstract: A measuring system for measuring bodies, such as vehicle bodies, is of a type which includes a main frame attached to and suspended under the body. Novel crossing clamps allow crossbars to be attached to the main frame at whatever position on the main frame that the operator should desire.

Abstract: A mechanical seal for pumps utilized in harsh environments such as coal/oil slurries or the like, where an annular head assembly is disposed in an annular recess in the pump housing, through which a rotatable shaft is journalled. A rotor, biased by a spring which is secured to the shaft, is pressed against the annular head assembly portion of the seal. Each component has a non-planar surface which is in rubbing contact with the another, the non-planar surfaces preferably being the shape of a truncated cone, the juncture of the surfaces being disposed within the space defined by the annular recess, to minimize particulate buildup, the non-planar faces permitting self-seating thereof due to misalignment, wear or contamination.

Abstract: The disclosed water stopper and water stopping process use an aqueously-swelling water-stopping composition consisting of 10 to 40 weight % of rubber whose main ingredient is polyisobutylene, 10 to 20 weight % of silicate, 10 to 60 weight % of bentonite, said silicate and bentonite acting as fillers, and 10 to 40 weight % of plasticizer. The aforesaid water-stopping composition may be extruded into an elongated water stopper with or without a core therein, which water stopper can be inserted in a joint gap or other gap of structural members to stop water at the gap.

Abstract: A balanced mechanical seal between two zones having different fluids, at least one of which may be corrosive, abrasive, of different lubricity, of elevated temperature and with other undesirable properties or characteristics. A buffer fluid is introduced into one zone at a constant rate so as to flow to a location radially inwardly of contacting seal faces and then radially outwardly of said seal faces. The flow serves to cool and lubricate the seal faces and substantially prevent the flow of fluid from the other of the zones radially inwardly across the seal faces. The ratio of areas which determines the seal balance is such that in the direction of buffer fluid flow it is of relatively low value. However, in the opposite direction of fluid flow, the balance is a much higher value. Thus in the event of buffer fluid failure, flow of the undesirable fluid across the seal faces is substantially prevented, thus preserving the faces from substantial damage from that undesirable fluid.

Abstract: The invention relates to a seal means for couplings in gas conduits, particularly for the complete capture of hot exhaust gases which are conducted into a gas stack, for example the exhaust gases of coal gasification reactor. The invention provides a coupling which is gas-tight and pressure-proof, is employable in all attitudes, vertically, horizontally, obliquely, and which exhibits only slight overall height. The invention provides that the gas stack is closed relative to the reactor by means of a sealing element which is designed axially and/or radially movable, preferably as a telescope seal. The sealing element preferably includes compensator bellows for the absorption of the axially and radially effective forces.

Abstract: A pressure balanced mechanical seal, especially adaptable for use in a swivel in an oil well drilling arrangement comprising a pair of relatively rotatable seal rings constructed of silicon carbide or tungsten carbide each received in a cavity defined by a cylindrical and a radial wall in the respective housing for the ring with the inner cylindrical surface of each exposed to high pressure, high temperature drilling mud and with means to communicate drilling mud to the outer cylindrical surfaces thereof, and means for balancing the axial forces on the rings and to insure sufficient axial forces for perfecting the seal. Tensional and compressive forces on the rings are minimized insuring reasonable life to the seal, far in excess of that in the conventional packings now used in the oil drilling system.

Abstract: In a transmission joint for rotating at high speed, a sealing device ensuring the retention of the lubricant comprises a bellows 9 of an elastomer and having an end wall 21 which is oriented radially and terminates in a heel portion 13 gripped in an annular groove 8 provided at the free end of a cap 4 surrounding one of the elements of the joint. In this way, there is obtained a minimum overall axial size of the joint and a good performance notwithstanding the effects of centrifugal force.

Abstract: A crossover seal assembly (44) for sealing the annulus between a well casing (16) and tubing head (22). The assembly includes spaced pairs of upper and lower metal seal rings (60 and 72, 108 and 120) having matching frusto-conical wedging surfaces (70 and 74, 118 and 122) which interact when an axial compressive force is applied to thereby effect a controlled radial expansion of the seal rings to sealingly engage the inner and outer cylindrical surfaces (48, 47) of the tubing head (22) and well casing (16). The axial compressive force is mechanically applied by a plurality of holddown lock screws (90) which interact through tapered conical tips (94) to energize the crossover seal assembly (44).

Abstract: A typical fluid mixer of the heavy-duty type conventionally has a compartment including walls, one of which has a circular opening through which a motor-driven shaft extends. An external seal is provided for sealing the shaft-to-wall junction against fluid leakage. When it becomes necessary to replace the seal, the compartment must be drained to avoid leakage at the opening. The present invention provides an internal seal that is normally spaced along the shaft away from the wall but which can be forcibly moved toward and compressed against the wall and thus seal the shaft and opening and preventing leakage during repairs and consequently eliminating emptying the tank. The interior seal is supported by a movable carrier, and reversible force-exerting mechanism extending exteriorly of the compartment is employed to move the carrier and interior seal into and out of its interior sealing position. In a preferred embodiment, the force-exerting mechanism includes one or more jack screws.

Abstract: An oil or like fluid seal having a rigid exterior casing, a primary lip and an auxillary lip, with the primary or axially inner lip having a primary seal band surface which is generally cylindrical in its relaxed condition and which includes at least one hydrodynamic pumping element on its shaft contact surface, with the auxillary lip, in its relaxed condition, being of greater inside diameter than the primary lip, with the primary and secondary lips being spaced apart so as to define an intermediate annular groove of generally V-shaped cross-sections between them, with the pumping element acting to space portions of the primary lip apart from the associated shaft so as to provide initial venting of gas and vapors from the sealed cavity into the intermediate region and beneath the auxillary lip as cavity pressure increases so as avoid excessive pressure build up in the sealed region or sudden or erratic venting of such pressure.

Abstract: A universal pipe joint assembly which comprises a connector housing having a main cavity defined by an internal spherical concave wall of a connector housing body a pair of axially spaced split rings with their inclined external circumferential walls disposed in relatively slidable contact with the internal spherical concave wall, each of the split rings being deformable so as to be inserted into the main cavity and expansible within the main cavity to take its operating position and a spacer seal ring sandwiched between the pair of split rings.