Abstract: A gasket formed from an elastomer precoated metallic sheet which is then perforated to provide projecting clinching tangs and thereafter combined with a facing layer to form gasketing material. The gasketing material is thereafter blanked to provide service and other openings. A method of making that gasket is also disclosed.
Abstract: An annular gasket of elastic resilient material for sealing the annular gap between a spigot end and a socket end of two pipes, said spigot end and socket having substantially coaxial sealing surfaces. The gasket comprises a main sealing body which, during the assembly of the pipes, non-slidingly engages a first pipe, and a thin-walled further body which defines a closed cavity containing a lubricant. During assembly of the elements, said further body is entrained by the second pipe and rolls between this pipe and the main sealing body. The inner surfaces of the hollow further body are pressed into contact with each other and slide relative to each other. The flattened further body increases the thickness of the gasket by twice the wall thickness of the further body.
Abstract: Seals for sealing clevis and flange joints (14) of a solid rocket booster motor, and more particularly to a seal (30) which is twisted upon application of expansion forces to an edge seal (36). This twisting motion initially causes a leading edge seal (44) to be urged into sealing engagement with a surface (48) of an adjacent member (20) and thereafter, increasing fluid pressure on a pressurized side (64) of a seal (30) drives a broad sealing region (46) into sealing engagement with a surface (48).
December 5, 1988
Date of Patent:
July 18, 1989
The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
Abstract: A high compliance seal is applied between each cylinder block end wall and an intake manifold which acts as a cover for the lubricant containing space between the banks of a V-type engine. The seal is formed of a rubber-like resilient material with rows of small waffle-like recesses formed on each of the sealing sides between intersecting spaced longitudinal and lateral ribs. The longitudinal ribs on the upper side are laterally staggered with respect to those on the lower side to form, as viewed in transverse cross-section, a sinuous body configuration that straightens out and flattens so as to combine with deformation of the resilient material into the recesses to provide a high degree of resilient compliance without overstressing of the resilient material.
August 19, 1988
Date of Patent:
July 11, 1989
General Motors Corporation
Mark S. Blodgett, Robert C. Ross, Allen W. Cline
Abstract: A split sealing ring has a latch structure of overlapping, interengaging surfaces inclined to the ring's axis, which inclined surfaces seat against each other and intersect only the outer circumferential face of the ring and one of the axial faces of the ring at a location spaced radially outwardly from the inner radial face of the ring and the axial opening through the ring at the center of the overlap is entirely surrounded by portions of the outer circumferential face of the ring.
Abstract: A cooling water pump seal for a combustion engine, in which a main seal rests on a shaft with a sliding fit and is preceded on the cooling water side by a protective seal. The protective seal consists of a filter fleece and is fastened to the housing supporting the main seal.
Abstract: A cylindrical seal assembly adapted for sliding or rotary movement within a cylindrical chamber comprises first and second body elements having substantially cylindrical shapes. The body elements are secured together with their respective cylindrical sidewalls being coaxially aligned. A cylindrical seal means is mounted between the body elements, such that the seal means makes continuous sliding contact with the cylindrical chamber when the seal assembly is received within the cylindrical chamber.
Abstract: An annular seal assembly for sealing an enclosed rotatable shaft. An annular sealing element is frictionally retained between portions of inner and outer metallic cases. The sealing element includes a sealing annulus and a reinforcing annulus which are disposed in laminar fashion and retained between the outer and inner cases. The sealing annulus is deflected by and sealingly engages the outer surface of the shaft when inserted therein. The reinforcing annulus is formed of silicone and is disposed adjacent to the sealing annulus so as to urge the sealing annulus into sealing engagement with the enclosed shaft, particularly when the sealing annulus is cold or when the shaft is highly eccentric. The reinforcing annulus is responsive to an increase in temperature or to an absorption of liquid for increasing in size, thereby reducing the amount of compressive force exerted thereby against the deflected portion of the sealing annulus.
Abstract: A floating seal device includes a fixed side O-ring held by a fixed side seal retainer, a rotary side O-ring held by a rotary side seal retainer, and fixed side and rotary side seal rings pressed against each other by the respective O-rings so that their opposed surfaces may be slidably held in contact with each other. Such device is improved in order to eliminate oil leakage, to reduce mechanical power loss, to avoid an increase in weight and to shorten the replacement time for lubricant oil by mounting an oil absorbing member made of felt or the like to a peripheral wall surface formed on the opposed surface of the rotary side seal ring.
September 26, 1988
Date of Patent:
July 4, 1989
Mitsubishi Jukogyo Kabushiki Kaisha, Eagle Industry Co.
Abstract: The face seal of a centrifugal pump has a stationary seal component mounted on the pump casing and a rotary seal component rotatable with the drive shaft extending into the casing and connected to the inner rotary pumping member or impeller. The rotary seal component is biased against the stationary seal component by a resilient welded metal bellows assembly having its end portion opposite the rotary seal component clamped to the drive shaft. To protect the welded metal bellows assembly against abrasive life-shortening contact with particulates in the liquid being pumped, a rigid shroud is provided including a generally cylindrical cavity having an inner wall portion extending close alongside the bellows for at least substantially the full axial extent of the bellows.
Abstract: An improved generally annular split sealing ring includes generally curved radially inner and outer surfaces and opposed first and second axial surfaces extending between the inner and outer surfaces. The sealing ring has an axially extending, radially centered axis and a cut extend therethrough from the inner radial surface to the outer radial surface to create a gap to facilitate installation and removal of the sealing ring. The cut extends through the sealing ring along a single continuous cut plane. The orientation of the cut plane is determined by establishing a first reference plane extending radially through the sealing ring and generally parallel to and through the axis. A second reference plane extends generally perpendicular to the first reference plane and midway between the first and second axial surfaces to establish a first generally radially extending reference line.
Abstract: The aperture between a positionally stable vehicle passenger space end wall and a steering spindle shaft penetrating a bore in the wall is masked by a sealing sleeve which exhibits a bellows which compensates an offset of the shaft by modification of its form. Attached to the sealing sleeve is a second sleeve with which the first sleeve forms a sound-insulating closed air chamber.
Abstract: A device for measuring the distance and direction of destinations on road maps from a starting point is suggested which serves for the data input of intermediate destinations in navigation devices. The device comprises an angle measuring plate (10) with a 360-degree scale (13) which is arranged concentrically relative to a central borehole (14) and which begins with the north direction. A bracket (11) is supported at the central borehole (14) so as to be rotatable and carries a measuring tape case (12) at its end area (11b) and a guide (20) for a measuring tape (19) at its opposite end area (11c), the measuring tape (19) being arranged in such a way that, when drawn out of the measuring tape case (12), the measuring tape (19) extends away radially in an outward direction with its one lateral edge over the center of the degree scale (13).
May 5, 1987
Date of Patent:
June 6, 1989
Robert Bosch GmbH
Hans Rauch, Eva Osterkamp, Norbert Stepper
Abstract: A laminated metallic gasket provided with two base plates each made from an elastic metal plate and having an annular bead formed therein in surrounding relationship to the combustion chamber hole. An intermediate constituent member is interposed between the two base plates and, directly adjacent and surrounding the combustion chamber hole, is provided with a compensating bent portion which is bent backwardly so as to radially overlap itself so that the constituent member is of increased axial thickness directly adjacent the combustion chamber hole.
Abstract: A seal assembly for such applications as a dynamic machine having a rotary component which is mounted for rotation in a housing having an interior wall. A seal member is provided with an inner sealing surface and an outer surface. A coating of metal is electroplated to the outer surface of the seal member. A meltable metal binder layer is bonded between the metal coating and the interior wall of the housing to create, effectively, a metal-to-metal bond between the seal member and the housing.
Abstract: Apparatus includes a mounting member having a bore which closely receives the shaft and a counterbore in which two elastic O-rings separated by an annular element are received. A first compression member threadably engages the mounting member to apply axial pressure to the O-rings, which are radially compressed against the shaft by bevelled annular surfaces which capture the O-rings. This provides an environmental seal effective for a vacuum while still permitting axial and rotational movement of the shaft. Apparatus further includes a ball member fixed to the mounting member and received against an O-ring in a socket member. A second compression member threadably engaging the socket member to urge the ball member against the seal to provide additional sealing while permitting pivotal movement of the shaft.
Abstract: A lip seal device for sealing the gap between a housing and a rotary shaft comprises a case surrounding the rotary shaft, a lip seal attached inside the case, support means for holding the lip seal on the other circumferential portion thereof and seal means located on the outside circumferential surface of the case. The inner circumferential portion of the lip seal is curved toward the sealed fluid. The lip seal includes a sealing surface provided with an annular groove extending continuously in the circumferential direction of the rotary shaft so that the sealing surface has a first and second sealing portion, the contact pressure of the first sealing portion on the rotary shaft being lower than the contact pressure of the second sealing portion on the rotary shaft.
Abstract: An FIP (Formed In Place) gasket arrangement includes three hollow parts which are joined with each other in such a way as to sealingly separate the inside and outside thereof. Two of the parts have surfaces which are flush with each other and adjoin at a line extending between the inside and outside of the two parts. The remaining one of the parts has a surface joined with the surfaces of the two parts by interposing therebetween an FIP gasket. The two parts also have edges extending along the above mentioned line, one of the edges being partially chamferred to provide a chamber. The FIP gasket has a portion filling the chamber.
Abstract: A heat safe ring seal comprises a metallic hollow ring (1) of uniform material thickness and radially inwardly facing channel-shaped radial profile. The walls of the channel adjacent their free ends are curved towards each other so as to form axially outwardly facing grooves (1a) which each accommodate and shield a concentric ring (2) of PTFE or elastomeric material.