Abstract: A fitting for safe on-stream addition of valve packing which comprises a housing enclosing a first and second chamber each chamber associated with a means for ejecting valve packing, the first chamber being accessible from the valve when the fitting is mounted and also accessible from the second chamber through sealable portals, and the second chamber having a sealable entrance to receive valve packing, thereby enabling safe addition of valve packing to a valve through the valve gland by: sealing the first chamber, adding valve packing to the second chamber and sealing the second chamber, opening the access portal between the chambers and ejecting the valve packing from the second chamber into the first chamber, sealing the access portal between the chambers and opening the portal between the first chamber and the valve, and ejecting the valve packing from the first chamber into the valve.

Abstract: An annular seal is positioned in an opening of a shelf for supporting electronic equipment. The annular seal has an outer portion which is clamped between an air flow control plate and the shelf to seal the plate to the shelf, and has an inner seal portion of greater height than the outer portion which extends through the opening in the shelf. The inner seal portion extends above the shelf and is sufficiently resilient to seal against the underside of electronic equipment which can be slid into position the shelf.

Abstract: A compact, coaxial multiple-shaft ferrofluid seal apparatus which comprises: a housing; a central shaft and magnetically permeable coaxial shafts about the central shaft, the coaxial shafts having a pair of spaced apart nonmagnetically permeable insulator shaft sections; magnetically permeable bearings to support each shaft; pole piece elements to provide radial gaps within the inner or outer shaft surfaces; ferrofluid disposed in the radial gaps to provide a seal apparatus for the shafts of designed pressure capacity; and a single radially polarized permanent magnet to provide a source of magnetic flux for the seal apparatus.

Abstract: Improved shaft seal is provided wherein generally radially extending distendable diaphragms are used to adjust the sealed gap. A flushing lubricant is provided. The seal is particularly suited for use in gear pumps handling viscous materials such as heat plastified thermoplastics.

Abstract: In a mechanical face seal for producing a fluid tight seal between a pair of relatively rotatable components a first sealing element is associated with one of said components and is fixed axially with respect thereto; a second sealing element is associated with the other component and is movable axially with respect thereto; means is provided for sealing the second sealing element with respect to its associated component and loading it axially into sealing engagement with the first sealing element and a thrust bearing is provided between the sealing element to partially reduce the load applied thereto.

Abstract: A ring seal tamper indicating device is disclosed in the form of a preselectively fracturable ring seal for sealing the space between a container and its closure. The ring seal has an adhesive on its top and bottom surfaces whereby removal of the closure causes the ring seal to fracture or distort to warn the user of prior tampering. As an alternative, the ring seal may be impregnated with an adhesive.

Abstract: An improved sealing surface configuration consists of a grid-like pattern of indentations formed into the surface, uniformly spaced to create a consequently uniformly spaced series of intermediate seal support pads. Each indentation includes a sloped wall converging with an adjacent pad in the direction of seal lip motion. The consequent hydrodynamic pumping action pumps lubricant out of the indentations and over the pads, creating a uniform lip supporting film to reduce friction. A method of deforming and machining the sealing surface to produce the configuration is also disclosed.

Abstract: An improved sealing means is provided in a multiple component assembly for delivering a fluid material under pressure which includes a lower fluid material container section having a cavity formed therein and provided with at least one outlet orifice formed in an outlet surface of the lower fluid material container section, which outlet orifice communicates with the cavity, an upper fluid material container section formed in at least two parts which are arranged in juxtaposed mating relationship and which define a cavity therein, one of the juxtaposed parts having a fluid material inlet in an inlet surface, the inlet communicating with the cavity in the upper fluid material container section. The upper fluid material container section is mounted in superposed mating relationship on the lower fluid material container section and the upper fluid material container cavity is arranged to communicate with the lower fluid material container cavity and thereby define a fluid material chamber.

Abstract: A Direct Readout Centerline Measuring Device and Process usable with standard height gages, dial height gages, electronic height gages, and angle protractors, to obtain a direct read out of centerline locations for fast accurate inspection lay-out, jig and fixture work, thereby eliminating common read out errors, and allowing direct readout of center line locations in much less time than is normally required with conventional types of measuring equipment.

Abstract: A leak free floating packing shaft seal is provided for a rotatable shaft d a supporting annular structure wherein the supporting annular structure has a high pressure upstream side and a low pressure downstream side. The floating seal includes an annular holder which is slidably mounted in the supporting structure for radial movement therein. A ring of packing material is mounted in a recess in the inner circumferential side of the holder. A first O-ring arrangement is mounted between the supporting structure and the upstream side of the holder for effecting a seal from the high pressure environment, and a second O-ring arrangement is mounted between the supporting structure and the downstream side of the holder. At least one passageway is provided for communicating the upstream and downstream size of the holder for balancing the pressures therebetween. With this arrangement the holder is free to undergo the radial movement without leakage and the detriment of lateral forces thereon.

Abstract: In plunger-type pumps a packing assembly is installed around the plunger to prevent fluid from leaking past the moving plunger. The packing assembly includes male and female adaptor rings, which are in face-to-face contact with the packing rings, but provide only a "sloppy" fit. The practice of this invention involves shaping the adaptor ring faces to conform precisely to the shape of the packing ring faces against which they are seated.

Abstract: A length measuring instrument includes a flexible measuring band which slides in a groove defined by a scale carrier body. The measuring band is fixed at one end to the carrier body. The second, free end of the measuring band is fastened in an oscillator which excites this free end into high frequency, low amplitude vibrations. These vibrations act virtually to eliminate harmful friction between the measuring band and the scale carrier body, and to reduce fouling of the measuring band markedly.

Abstract: A chemically aggressive fluid e.g. a fluid containing chlorine or a chlorine compound, is conducted through a polytetrafluorethylene tube coated with lead and covered with a thermal insulation wrapping. Other tubes and/or a heating element may be included in the wrapping.

Abstract: A plastic profiled sealing element for household refrigeration appliances, such as freezers, refrigerators, freezer chests, freezer compartments, etc., includes a sealing bellows having a hose-shaped cross section. The sealing bellows is provided with two side walls and a covering wall and is made of a plastic which has been set by means of a softener so as to be continuously flexible. Further, the profiled sealing element is provided with an anchor member made of a plastic of the same or different material hardness, with the sealing bellows and the anchor member being connected with one another to form a unit. The cross sections of the two side walls of the sealing bellows narrow as the side walls rise from the region of the connection of the side walls with the covering wall of the anchor member to approximately half the height of the sealing bellows, so that the side walls become increasingly thinner.

Abstract: A hydraulic seal and an oil scavenge system are combined, and oil pumping gears and other associated equipment thus obviated. The hydraulic seal 32 comprises an oil reservoir holding centrifuged oil, and an annular fin 22, the periphery of which dips in the oil. The fin 22 has an orifice 33 which receives the oil under pressure derived from the speed of rotation of the oil, and passes it via conduit 34,26 to an oil sump.

Abstract: Apparatus and a method for aligning the rolling plane of each of the wheels of a car, truck, trailer or other wheeled vehicle to factory specifications and to be parallel to the thrust line of the rearmost wheels. The apparatus comprises various embodiments of an adjustable stationary reference "halo", mountable in concentric relation about a vehicle or trailer, and relative to which individual gauge assemblies mounted to each of the wheels detects each wheel's toe condition and permits the determination of the vehicle or trailer thrust line and the correction of the rear suspension thereto. Wheel mountable caster, camber and king-pin inclination/strut angle detecting assemblies, in turn, permit the detection of each of these respective conditions for each wheel and the correction of each condition in relation to the established thrust line.

Abstract: A track link assembly in which an outer link end has an annular recess opening towards an inner link end and which further has a track bushing on the connecting pin or link extending through the inner link and fixed thereto. The bushing has an end facing the recess with an annular groove in that end. A comparatively hard seal ring is positioned in the recess and has an annular end portion conforming in shape and seated in the annular groove and extending radially and inwardly from that end to an opposite end that has a pair of annular lips, one of which engages a radial wall surface of the recess and the other of which engages the surface of the pin. The hard seal ring is provided with a comparatively resilient load ring that maintains seating between the lips and their respective surfaces and the one end of the hard seal ring and the annular groove.

Abstract: A seal comprises a disk flared to bear on a machine element to be sealed at two zones separated by an axial distance therealong has the machine element. The side of the flared disk along two hydrodynamically-acting back-feed elements which intersect each other.

Abstract: An abradable/abrasive seal system having particular utility in gas turbine engines is described. The seal system includes an abrasive layer (40) which prevents direct interaction between components (30, 20) having relative motion and an abradable layer (43) which provides an effective degree of fluid sealing between the components.

Abstract: A pattern for determining dimensions of projected or printed figures is provided having individual scaling figures therein on a mask or template. Dimensional measurement may be indicated by alignment of opposing edges of scaling figures offset from each other along the corresponding axis of alignment. Reference marks may be provided on the pattern and associated with each possible axis of alignment for indicating an absolute dimension of a concurrently projected or printed figure. To conserve space, the pattern may be "densepacked" with scaling figures such that each scaling figure includes a plurality of opposing edges, each alignable along a different axis in response to different levels of dimensional distortion.