Abstract: A seal assembly including first and second rigid shields and a sealing member carried by the first shield and having a first and second annular sealing lip in sealing engagement with respective sliding surfaces of the second shield. The first sealing lip carries in a radial seat thereof a toroidal spring exerting a radially eccentric thrust on the first sealing lip with respect to an elastic hinge defined by a common root portion of the lips, having a center of rotation located along a line extending through a V-shaped sealing edge of the first lip and forming a 20° to 60° angle with a radial plane. The root portion is defined between two opposite annular recesses having a U-shaped cross-section and bottom walls facing each other, substantially aligned along the aforementioned line.

Abstract: A sealing element for a pipeline pig includes rigid first and second cup supports having outer peripheral edges. A resilient sealing element protrudes beyond the outer peripheral edge of each of the first cup support and the second cup support. Means are provided for clamping the sealing element between the first cup support and the second cup support.

Abstract: Seal assemblies for sealing around a moveable shaft, such as rotary or reciprocating, or static, are described. The seal assemblies prevent the passage of lubricant or fluid from a relatively high pressure area on a first side of the seal to a relatively low pressure area on a second side of the seal. In some embodiments, these seals are energized by energizers, such as circular springs or canted springs, to keep the seal in contact with the moveable shaft. The seals have primary and secondary seals. The secondary seal provides initial moderate sealing against abrasive particles or contaminants to reduce the exposure and wear of the primary seal.

Abstract: A valve assembly for sealing and control of a fluid, gas or dry material. The valve assembly includes a seal assembly having a hollow seal, a related valve body, and an actuator assembly. The valve body has a generally circular internal cavity with the seal assembly having a generally tubular solid wall defined tip having a flexible wall portion containing a seal element used to seal against both static and dynamic forces. An actuator assembly actuates the seal assembly. The seal assembly is situated coaxially within the valve internal cavity and thereby defines an internal fluid passageway within the valve body.

Abstract: A seal assembly, includes a seal element including at least one seal lip, a wiper element including a wiper lip, and a structural element attached to the seal element and the wiper element, the seal assembly being configured for functioning under pressure in an amount greater than 500 pounds per square inch.

Abstract: A seal for a high speed flywheel mounted on a shaft and comprising an evacuated core, the seal having two housing sections, and a cavity formed between the housing sections, lip seals being provided on either side of the cavity, the lip seals being in contact with and encircling the shaft, wherein an oil based fluid can be inserted into the cavity via a fill nipple, and during insertion of the fluid, air can be expelled from the cavity via a bleed nipple, whereby the fluid can form a hermetical seal against the shaft, and wherein the fluid inserted into the cavity does not vaporize at the pressure of the evacuated flywheel core.

Abstract: A nose seal for forming a fluid seal with a sealing surface in a bore The nose seal is particularly suitable for use in high pressure and high temperature conditions. The nose seal includes a substantially deformable sealing ring, which can form a resilient fluid seal with the sealing surface, and a substantially rigid ring, which prevents or limits extrusion of the substantially deformable sealing ring in high temperature and/or high pressure environments.

Abstract: Seal assemblies are herein discussed. The seal assemblies can have a stiff backing ring supporting a seal ring, which is positioned adjacent an inner seal ring. In preferred embodiments, the inner seal ring is made from a material that enables the inner seal ring to absorb media particles in situ to change its particle density. This allows the seal assembly to form wearable surfaces on the fly to decrease wear on the seal ring.

Abstract: A high-speed vertical take-off and land aircraft includes a body with an engine supported by the body. A fan assembly is also carried by the body. The fan assembly includes a hub and a plurality of blades to provide vertical lift for the aircraft. A nozzle ring is provided on the fan assembly. The nozzle ring includes an annular nozzle array. Hot gases from the engine are fed to the nozzle array by a feed duct. A bearing mechanism supports the fan assembly on the body. The bearing mechanism is carried in a work space. A brush seal assembly thermally isolates the work space from the hot exhaust gases passing through the feed duct to the nozzle array.

Abstract: A dual seal accommodates radial and axial movement, and accommodates positive and negative pressure differentials, when in sealing engagement about a rotating shaft.

Abstract: A seal for static and dynamic sealing of a space between two surfaces. The seal includes a radial inner end defining a radial inner surface, a radial outer end defining a radial outer surface, a first axial end face, and a second axial end face, the radial inner end having a width narrower than the width of the radial outer end. The seal may have an annular recess extending around the circumference of the seal. When the radial inner surface is disposed about first surface, the seal is rollable about an edge of the radial inner end such that one of the first axial end face and the second axial end face is disposed against the first surface, and the opposite axial end face is oriented toward and compressible against the second surface.

Abstract: A sealing arrangement is provided, including a sealing ring for sealing two machine elements from one another, the sealing ring being configured in an installation space for the second machine element that is open toward the first machine element to be sealed, and sealingly contacting the surface to be sealed of the first machine element, by way of at least one dynamically loaded first sealing lip. The sealing ring is arranged under elastic axial and radial preloading within the installation space.

Abstract: A system and method for an asymmetric K-ring is disclosed. The system and method is for forming a K-ring with the dynamic sealing surface (514) closer to one edge or face (506) of the k-ring than the other edge or face (504) .

Abstract: A valve has a housing, a shaft with a valve disc, and a sliding shaft support portion along which the shaft slides, wherein the sliding shaft support portion is provided with a seal member movable and deformable in a certain range.

Abstract: The disclosure is directed to a method of forming a seal device. The method includes forming a laminate construction including a flexible material layer and a rigid material layer, patterning the rigid material layer after forming the laminate construction, and shape forming the laminate construction into the seal device.

Abstract: The present invention generally relates to sealing devices used in conjunction with two relatively rotatable members and having a fluid seal there between. Finger seals are utilized to achieve sealing between a rotating member and a stationary member. As such the present invention involves a double padded finger seal with both pads oriented axially in the same direction. The sealing apparatus may optionally utilize a padless third laminate. In other embodiments, the present invention provides variations of the basic double padded finger seal with pad configurations utilizing various arrangements and geometries of the padded area.

Abstract: A high pressure shaft seal (10A) for use in a refrigerating machine wherein carbon dioxide is used as a refrigerant in lieu of “Freon”. The seal has a sealing lip (24A) made of a non-elastomeric polymer material such as nylon that has a small gas permeability coefficient, a region of the sealing lip brought into contact with a shaft to be sealed being lined with a low friction lining (26A) of polytetrafluoroethylene. The gas barrier sealing lip (24A) of nylon serves to effectively block permeation of carbon dioxide gas under an extremely high pressure of from about 4 MPa to about 12 MPa. The sealing lip (24A) of nylon has a relatively high rigidity but is nevertheless able to resiliently undergo elastic deformation when such a high pressure is applied, to thereby resiliently follow any shaft run-out to exhibit sufficient dynamic and static sealing functions.

Abstract: A unitary sleeve lip seal can be used to provide permanently lubricated sealed bearings in severe service conditions such as the track pins of track-driven vehicles and agricultural equipment. The seal has a labyrinthine exclusion path and multiple dust lips contacting the sleeve in addition to the main sealing lip. A garter spring encircling the main sealing lip may enable the seal to operate at moderately elevated pressures. The sleeve has a radial flange at the outermost end. Elastomeric lips extend between the sleeve flange and a faceplate that terminates the outside end of the seal housing. The seal is packed with water-resistant grease and can, when installed in association with grease-packed bearings can create a permanently lubricated bearing/shaft assembly that requires no re-greasing. Resilient coatings both protect the sleeve and case and also improve leak resistance, especially when the seal is retrofitted onto shafts that have been damaged.

Abstract: Seal devices of this invention are prepared by the process of depositing a polymer material onto a metallic substrate to form a composite construction, and shape forming the composite construction into the shape of a seal device. The so-formed seal device comprises a casing member that is formed from the metallic substrate, and a sealing element disposed along a surface of the casing member that is formed from the polymer material for placement against a sealing surface. Seal devices of this invention can be shaped formed into a variety of different types of seals, e.g., lips seals, L-shaped seals, and U-cup seals, which may or may not be energized. Seal devices prepared according to this invention using such preformed composite construction enable seal formation by a single step of shape forming, without having to both make and form individual seal members, and subsequently combine or join the separately formed seal members together.

Abstract: A dual seal assembly for providing a seal between a reciprocating rod and the gland is described. The dual seal includes first and second axially adjacent annular seal elements. The first seal element is constructed of a material having a different hardness than the material forming the second seal element. The first and second seal elements each include a seal edge contacting the rod to provide a respective seal between the first and second seal element and the rod. At least a portion of one of the first seal element and the second seal element engages the gland to form the seal between the rod and the gland. By varying the hardness of the materials forming the seal elements, the first seal element and the second seal element can be configured to provide different functions within the dual seal assembly and can cooperatively provide an effective fluid seal under a wide range of operating conditions.

Abstract: A brush seal is provided wherein the brush seal is disposed in a section of a steam turbine for reducing leakage of a working fluid across a pressure drop. The brush seal comprises a bristle holder attachable to the steam turbine and a plurality of bristles comprising Ni, Cr, Mo, Fe, W, Mn, V, Si, and C.

Abstract: A seal assembly for providing sealing between a movable cylindrical body and a housing body comprises separate sealing mechanisms for providing static and dynamic sealing. The seal assembly is associated in fixed relationship with either the cylindrical body or the housing body and provides a static seal with the body it is associated with and a dynamic seal with the body that moves relative to the seal assembly. The static sealing mechanism is temperature-activated so that within the operating temperature range, a metallic member of the static seal mechanism is pressed tightly against the associated body to provide a fluid tight static seal. The temperature-activation is caused by the metallic member having a different thermal expansion coefficient than the associated body. The dynamic seal may employ known dynamic sealing mechanisms such as spring-energized seals, interference fit seals, and/or temperature-activated seals.

Abstract: The present invention discloses a method of sealing dynamic shaft applications. The method comprises providing a dynamic shaft assembly containing a bore for receiving a seal, providing a unitized seal, and placing the unitized seal on the shaft, thus sealing the assembly so that lubricants may not escape, and foreign material may not enter. The unitized seal can provide permanently lubricated sealed bearings in severe service conditions such as rollers and idlers of track-driven vehicles and agricultural equipment.

Abstract: A method of forming a seal assembly around a shaft is disclosed. The method includes (a) urging a first seal member against a second seal member so as to produce a load between a first seal face and a second seal face, (b) measuring the load produced between the first seal face and the second seal face during the urging step, and (c) securing a first support member to the shaft when a predetermined load value between the first seal face and the second seal face is attained so as to fix the relative position between the first seal member and the second seal member such that the predetermined load is substantially maintained between the first seal face and the second seal face. An associated seal assembly geometry is also disclosed.

Abstract: The present invention discloses a method of sealing dynamic shaft applications. The method comprises providing a dynamic shaft assembly containing a bore for receiving a seal, providing a unitized seal, and placing the unitized seal on the shaft, thus sealing the assembly so that lubricants may not escape, and foreign material may not enter. The unitized seal can provide permanently lubricated sealed bearings in severe service conditions such as rollers and idlers of track-driven vehicles and agricultural equipment.

Abstract: A flexible seal is provided for sealing engagement between a rotating drum and a stationary air duct. The seal includes an elongated mounting member adapted to frictionally fit over the edges of the duct, and a resilient bulb extending from the mounting member. An HMWP wear strip is mounted on the bulb so as to be in sealing engagement with the curved surface of the drum.

Abstract: A tire structure includes an outer tire includes a tread and two sidewalls extending from two sides of the tread. Two lip portions are formed on each of two sidewalls of the outer tire so as to be engaged with a wheel rim. An inner member is located inside of the outer tire and two peripheral edges of the inner member are connected between two opposite insides of the two sidewalls of the outer tire. The positions where the two peripheral edges of the inner member are connected to the insides of the sidewalls are located above the two respective lip portions. A valve is connected to the inner member and communicates with a space defined between the outer tire and the inner member.

Abstract: A transom seal assembly for sealing an opening in a boat transom is provided. A propulsion system has a part thereof extending through the transom opening. The seal assembly comprises an inflatable seal between respective peripheries of the part and the transom opening to provide water-tight sealing relative to the interior of the boat even in the presence of a seal puncture condition.

Abstract: The choke arrangement comprises an elastic choke ring which consists of a single piece with a gap formed by a parting joint. The choke arrangement: further comprises a support ring which is arranged directly adjacent to the choke ring in the axial direction, with the support ring serving, among other things to cover over the gap of the choke ring. An advantage of the choke arrangement with an elastically resilient choke ring is to be seen wherein the choke ring reacts to dynamic pressure changes and thereupon changes its sealing properties. A peak in pressure produces an increased difference in pressure at the choke arrangement, whereby the elastic choke ring is pressed against the sliding surface of a piston rod and effects an increased sealing action, so that the pressure peak cannot propagate to a sealing ring placed after the choke arrangement.

Abstract: A shaft seal assembly includes an outer stationary carrier, an inner member, and a sealing system including a primary lubricant-retention seal that is fixed to the carrier in combination with a number of debris-excluding seal features. Such features include a first debris-exclusion seal fixed to the carrier adjacent the primary seal and a second debris-exclusion seal that is mounted on either the carrier or inner member and has at least one lip sealingly engaging the other of the carrier and inner member in spaced relation to the first debris-exclusion lip defining a sealed annular cavity therebetween. Disposed within the cavity is a porous filter element in the preferred form of an open cell sponge. The various dust exclusion features cooperate to allow each to perform efficiently. The outermost second debris-exclusion seal guards the foam against substantial debris, and the foam in turn protects the first debris-exclusion lip against virtually all debris.

Abstract: An annular wear sleeve for a shaft seal is fabricated of an elastically deformable metal material and includes an annular body portion and an end flange portion. The sleeve is slightly oversized relative to the shaft on which it is installed to provide a low force slip-fit installation on the shaft. Once installed, the end flange is elastically deformed, imparting a radially inward bending force on the body portion causing the inner surface of the wear sleeve to constrict about and engage the outer surface of the shaft, providing intimate metal-to-metal contact therebetween to dissipate heat from the seal member and to secure the wear sleeve against rotation on the shaft in service. Releasing the deformation force on the end flange enables the wear sleeve to recover its elastic deformation, causing the wear sleeve to release the constricting engagement with the shaft enabling it to be dismounted from the shaft with low force in the same manner as was required for installation.

Abstract: A rebuildable radial lip seal having a replaceable sealing element for sealing around a movable shaft and adapted for removable placement within a seal housing. The rebuildable radial seal comprises an annular sealing body which extends radially between an annular inner seal surface and an annular outer seal surface. The inner seal surface defines a first inner diameter and includes a circumferential rib which protrudes radially inward from the inner surface. An annular end flange is coaxially engageable with the seal body. The end flange includes a coaxially protruding annular rim which is engageable within the first inner diameter of the seal body to form a circumferential inner slot between the circumferential rib and the inner surface of the seal body and the annular rim on the end flange. An annular sealing element having an inner sealing lip is sealably captured within the inner circumferential slot formed between the seal body and the end flange.

Abstract: A unitized oil seal assembly (20, 220, 320,420) has a sealing disk (34, 234, 334, 434) fabricated of a single water of PTFE-based material that is split along its radially outer edge to define a pair of split sections, one of which (48, 248, 348, 438) is fixed to an outer annular carrier member (30, 230, 330, 430) and supports the other split section (50, 250, 350, 450) and an unsplit section (52, 252, 352, 452) in sealing engagement with corresponding sealing surfaces of a wear sleeve (32, 232, 332, 432) to exclude contaminants and retaining lubricant, respectively, from passing by the seal assembly (20, 220, 320, 420).

Abstract: A two-piece cartridge-type seal for wheel bearings and the like. The seal element contains a radial flange having a seal attached thereto and a mounting flange portion. The wear sleeve portion includes a cylindrical flange receivable over a rotary part, and a radial flange having an extension with an inner surface which engages a part of the seal during installation only. In use, the radial flange of the wear sleeve is engaged by a tool, and this radial flange deflects slightly to push the seal element into a desired position of installation, whereupon, when the tool is removed, the radial flange springs back and creates a slight working clearance between these parts.