Abstract: A highly efficient packing material is provided in the form of a flexible, corrugated expanded graphite ribbon or tape, which material can be used to pack the stuffing box assembly of any pump or valve, or like structure, regardless of the dimensions of the shaft and stuffing box of such pump or valve. The use of corrugated ribbon or tape of expanded graphite as a packing material eliminates the former requirement for pre-made rings which had to be sized to conform precisely to the dimensions of the stuffing box and shaft of such pump or valve, and vastly broadens the applicability and use of this highly efficient packing material to many field operations where such use was formerly impossible.

Abstract: Seal ring made of an elastomeric material intended to operate at a temperature at least equal to 150.degree. C and to be in contact on its opposite sides with two mediums one of which at least is a medium emitting nuclear radiations and to be able to slide with a very slight friction coefficient in contact with a body which rotates and/or moves in a linear direction, comprising a body with an outer casing made of an elastomer which is resistant to heat and to nuclear radiations and has a low friction coefficient and with an inner casing made of a heat resisting elastomer, the outer and inner casings being closely welded to each other, the body being filled with a low-pressure gas and the inner casing being impermeable to the gas for filling the body. Application to seal rings for vessels in a radioactive medium.

Abstract: A deformable metallic element particularly characterized in that the element is formed of a hard resilient metal which undergoes work hardening when it is deformed beyond the elastic limit thereof. The element is made in the form of a relatively thin walled tubular member convoluted in longitudinal cross section and upon axial compression undergoes a first period of resilient deformation during which the compressive force increases substantially linearly followed by a second period of plastic deformation during which the compressive force remains constant.The element of the present invention is particularly useful as a load member to create a predetermined load on a part which it is desired to maintain under a predetermined constant load.

Abstract: The present invention provides a mixing head having vertical lift slides in which the injection pressures can be altered. Each lift slide is provided with a number of injection openings of different diameters arranged in one plane perpendicular to the axis of the slide. The injection pressure is altered by rotating the lift slide to bring a different injection opening into registry with a mixing chamber. The head of each lift slide is provided with a head having change-over detents which mesh with a carrying yoke to facilitate changing injection openings. The lift slides may also be provided with return openings of such diameter that the pressure in the system remains the same whether the slides are in a mixing position or a return position.

Abstract: A vacuum seal designed for the continuous movement therethrough of fibrous materials, such as carpet yarn, into a gaseous-plasma vacuum system while preserving a vacuum of about 1 Torr is described. The seal comprises a lower metal block with an elongated groove formed in the flat upper surface thereof and an upper metal block having an open bottom air chamber formed in its lower flat surface. In its assembled form, a flexible membrane is positioned between the formed, flat surfaces of the blocks. A seal is formed by pressurizing the air chamber in the upper block, thereby forcing the flexible membrane against the groove in the lower block and the upper side of the material passing therethrough, thus forcing the material to conform to the shape of the groove. Continuous variation in the degree of vacuum seal may be achieved by varying the pressure in the air chamber in the upper block.

Abstract: A sealing arrangement is disclosed for sealing a stationary member to a rotatable member and comprises a pair of rubbing seals mounted on one of the rotatable and stationary members in rubbing engagement with the other of the members. The rubbing seals are relatively closely spaced to form a sealant space therebetween extending radially from the rotatable member to the stationary member and circumferentially and continuously about the rotatable member. The stationary member has a sealant passage extending therethrough in communication with the sealant space. An arrangement is provided for injecting fluid sealant through the sealant passage and into the sealant space so that the sealant space is completely filled with sealant to form a continuous sealing band of fluid sealant extending circumferentially about the rotatable member.

Abstract: A fabricating machine for setting the teeth of opposed connector plates into wooden truss members. The machine includes a first, assembly station and a second, pre-press station across from the assembly station. A roller press having upper and lower rollers is disposed at one end of the pre-press station through which an assembled truss member and jigging pass to drive connector plates into the upper and lower sides of the truss member at the joints of the wooden components thereof. A third, post-press station is provided on the opposite side of the roller press in alignment with the pre-press station for receiving a completed truss member and its jigging. A fourth, unload station is provided across from the post-press station and in alignment with the assembly station so that a completed truss member can be removed from the jigging and the jigging returned directly to the first, assembly station.

Abstract: In a fluid face seal assembly comprising an elastomeric annular seal for engaging in a recess of a stationary housing or the like component, an axially directed extension on a radially inner limb of the annular seal, an annular face seal carried by said extension and spring means acting between said face seal and said annular seal to maintain a resilient relationship between the two, the invention provides a step constituting a carrier member at the free end of the extension and a thickened free end on the step which retains the face seal in abutment against the shoulder between the step and the remainder of the extension, and a retainer acting to compress the thickened end of the step between itself and a radially adjacent part of the face seal thereby mechanically to lock said face seal onto said carrier member.

Abstract: The unit comprises a hollow cylindrical shell in the wall of which is formed an aperture through which an electrical cable passes. The cable thus passes from the ground surface on the outside of the drill string, but enters into the interior of the drill string through the aperture and continues to the bottom of the drill string inside the drill string. The aperture around the cable is sealed to withstand the high pressures present in the interior of the drill string.

Abstract: An accessory mountable on a toilet, so as to prevent males, during urination, from urinating on a floor or on the toilet; the accessory including a cylindrical shaped shield made of plastic or rubber, and which is accordion pleated, so as to collapse and fold underneath the toilet seat, the shield being upwardly extendable by means of operation of a foot pedal, and which in its upward extended position shields against urine splashing outwardly from the toilet.

Abstract: A system supplying oil to the seal plates of a generator. Seal oil is provided by a primary pump and a secondary pump which acts as a backup for the primary pump. Under normal operating conditions a portion of the seal oil supplied by either pump is diverted through a bypass line so that only a predetermined amount of oil actually flows to the seal plates. When the flow rate through the bypass line falls below a specific amount, the secondary pump is activated. If, at any time, the oil pressure supplied to the seal plates falls below a predetermined amount, then a hydraulic accumulator maintains the necessary pressure and flow rate for a relatively short period of time required to bring the backup pump to its proper pressure and flow rate.

Abstract: An oil seal construction for a rotary mechanism including a seal ring receivable in an annular groove in an end face of the rotor of said mechanism with the ring having a pair of radially-spaced annular surfaces for sealing engagement with the adjacent side housing and with a ring of elastomeric material disposed in said oil seal groove behind the seal ring and also including a metallic spring disposed behind the elastomeric ring such that the metallic spring forces act through the elastomeric ring to urge the seal ring outwardly of the rotor groove.

Abstract: A laser interferometer is disclosed in which the measuring path is enclosed in an elongated hollow body which has a flexible slot along one side through which extends the entrainment means for the movable reflector enclosed within the hollow body. This hollow body is maintained under a vacuum, with the area around the flexible slot being filled with a fluid to help maintain the vacuum. This fluid may be highly viscous oil or a magnetic fluid which is maintained by the magnetic field of permanent magnets.

Abstract: An open-ended accumulator is provided which may be constructed to be of a relatively large size, for example, in the 15-25 gallon range, and to be of relatively high pressure of the order, for example, of 5,000 psi. The accumulator is constructed so that its internal bladder can be replaced from one end of the shell without the need to remove the accumulator from the equipment in which it is installed. The accumulator includes a forged cap which is contoured to accept the rim of a thimble-shaped bladder within the shell, the cap being fitted within the open end of the shell. A segmented wedge-shaped tapered ring retains the cap in the shell. As outer plate may also be provided to permit the accumulator to be mounted under water without the water pressure tending to force the cap into the interior of the shell.

Abstract: Sealing means for a longitudinally displaceable rod forming part of, for example, an aircraft undercarriage, comprises a flexible annular sealing element having a skirt which is folded back to define a toroidal cavity which receives fluid under pressure to press a lip of the sealing element into fluid-tight engagement with the rod.

Abstract: This invention relates to a piston ring having two ring elements and a spacer-expander the latter including a series of interconnected parts each comprising two pairs of inwardly directed limbs, the inner ends of which are in contact with and resiliently load the ring elements, and a spacer element which extends transversely to space apart the ring elements at the outer periphery.

Abstract: A seal apparatus for making demountable gas tight seals between juxtaposed dissimilar material parts in high temperature, high pressure and chemically reactive environments. The seal is comprised of two or more concentric elastomer washer seals mounted in a first juxtaposed part within a recessed channel of measured depth. The washer seals have a thickness greater than the measured depth of the channel, thereby providing contact with the second juxtaposed part interfaced with the first or channeled part. The inner concentric elastomer washer, being made of chemically relatively inert material, and the outer concentric elastomer washer being made of high resilient, therefore relatively chemically reactive material. The outer concentric washer seal is the true load bearing seal; the inner seal is a means for shielding the load bearing seal from chemical deterioration.

Abstract: An annular composite two-piece seal is described for sealing engagement with a reciprocating member. The composite seal includes a soft, flexible, annular sealing ring having an annular sealing lip with a chamfered portion facing the high pressure side of the seal and inclined toward the reciprocating member, and having an axially and circumferentially extending wall for sealing engagement with an axially directed circumferential wall of a groove in a stationary member receiving the seal. A second annular sealing ring of harder and lower friction material is formed with a circumferentially extending sealing lip for engaging the reciprocating member. Both of these sealing lips seal with the reciprocating member at a low pressure loading of the seal. The sealing lip on the second ring is deflected into tighter sealing engagement with the reciprocating member with increased pressure on the first ring.

Abstract: A one-piece seal member of elastomeric material having an endless main body portion and a pair of leg portions projecting axially from the main body portion in side-by-side relation. The leg portions each have outer sealing surfaces and inner surfaces, and an endless, unobstructed narrow groove is formed between the leg portions. The groove has side walls that extend axially from a closed base to a normally open end at the juncture between the inner surfaces of the leg portions. The leg portions thus flex toward each other about the base of the groove from an unstressed position when the groove is open to provide relatively low resistance to movement of the sealing surfaces. The legs have an installed position relative to each other when the open end of the groove closes, whereupon the resistance to movement of sealing surfaces toward each other, and hence the sealing pressure exerted thereby, is abruptly increased.

Abstract: An improved screw seal for providing a dynamic seal between a screw and a nut is disclosed. A carrier for the screw seal includes a chipper, wiper, and a sealing member. The wiper includes a wiper seal and a drain groove which cooperate to remove lubricants from the surface of the screw and direct them between the nut and screw.