Seals and methods for making and using same

Abstract

1. A seal comprising: an annular jacket including a body including a first lip and a second lip defining an annular recess, the first lip including an arcuate outer portion and the second lip including a straight outer portion and a straight tapered edge; and an annular energizer disposed within the annular recess adjacent at least one of the first lip and the second lip.

Description

[Technical field]

[0001] FIELD OF THE DISCLOSURE The present disclosure relates to seals, and more particularly to annular seals or seals adapted to be deployed under pressure conditions. [Background technology]

[0002] Seals are used in environments to separate fluids (liquids, gases, slurries, etc.) from one another. Often these seals may include energizers. Often these seals must exhibit minimal leakage under stringent pressure requirements over a wide temperature range. Often seal wear and leakage issues arise during cycling from low to high fluid pressures in applications such as, but not limited to, UHPLC and HPLC pumps. Thus, the industry continues to demand improved seals that can withstand a wider range of pressure and temperature conditions while maintaining operational effectiveness over time. Summary of the Invention

[0003] Embodiments herein may include a seal including an annular jacket including a body including a first lip and a second lip defining an annular recess, the first lip including an arcuate outer portion and the second lip including a straight outer portion and a straight tapered edge, and an annular energizer disposed within the annular recess adjacent at least one of the first lip and the second lip.

[0004] Embodiments herein may include a seal assembly including a first member, a second member, and a seal disposed between the first and second members, the seal including an annular jacket having a body including a first lip and a second lip defining an annular recess, the second lip including a linear tapered edge, and an annular energizer disposed within the annular recess, the second lip contacting at least one of the first or second members over more than 0.1% of a surface area of ​​the second lip.

[0005] Embodiments herein may include a seal assembly including a first member, a second member, and a seal disposed between the first member and the second member, the seal including an annular jacket including a body including a first lip and a second lip defining an annular recess, the second lip having a linear tapered edge, and an annular energizer disposed within the annular recess, wherein a pressure applied to a surface area of ​​the second lip is less than 250 MPa. [Brief description of the drawings]

[0006] Embodiments are illustrated by way of example and not by way of limitation in the accompanying drawings. [Figure 1] 1 includes a cross-sectional perspective view of a seal according to one embodiment. [Figure 2A] 1 includes a cross-sectional perspective view of a seal pre-assembly according to one embodiment. [Figure 2B] 1 includes a cross-sectional perspective view of a seal assembly according to one embodiment.

[0007] Those skilled in the art will appreciate that elements in the figures are illustrated for simplicity and clarity and have not necessarily been drawn to scale, for example, the dimensions of some of the elements in the figures may be exaggerated relative to other elements to help improve understanding of embodiments of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] The following description in combination with the drawings is provided to aid in understanding the teachings disclosed herein. The following discussion focuses on specific implementations and embodiments of the teachings. This focus is provided to help explain the teachings and should not be construed as a limitation on the scope or applicability of the teachings. However, other embodiments can be used based on the teachings disclosed in this application.

[0009] The terms "comprises," "comprising," "includes," "including," "has," "having," or any other variations thereof, are intended to cover non-exclusive inclusions. For example, a method, article, or apparatus that includes a list of features is not necessarily limited to only those features, but may include other features not expressly listed or that are inherent to such method, article, or apparatus. Further, unless expressly stated to the contrary, "or" refers to an inclusive or, not an exclusive or. For example, a condition A or B is satisfied by any one of the following: A is true (or present) and B is false (or absent), A is false (or absent) and B is true (or present), and both A and B are true (or present).

[0010] Additionally, the use of "a" or "an" is used to describe elements and components described herein. This is done merely for convenience and to give a general sense of the scope of the invention. This description should be understood as one, at least one, or the singular as including the plural, or vice versa, unless it is clear that this is not meant. For example, where a single item is described herein, two or more items may be used in place of the single item. Similarly, where two or more items are described herein, the two or more items may be replaced with a single item.

[0011] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention belongs. The materials, methods, and examples are illustrative only and are not intended to be limiting. To the extent not described herein, many details regarding specific materials and processing operations are conventional and can be found in textbooks and other sources in the sealing art.

[0012] FIG. 1 illustrates a cross-sectional perspective view of a seal according to some embodiments. Referring initially to FIG. 1, a seal 100 according to some embodiments described herein may generally include a jacket 102 and an energizer 108. The jacket 102 may include a body 104 having a heel 116, a first lip 112, and a second lip 114. In one embodiment, the body 104 may include an interior sidewall 105 that may define an annular recess 106. In some embodiments, the energizer 108 may be disposed within the annular recess 106.

[0013] Under load, the energizer 108 may deform radially in the axial width of the seal 100 to contact or even press against the lips 112, 114 of the jacket 102. As a result, the lips 112, 114 may provide an outward force against adjacent components in the assembly (e.g., the first and second members, respectively). Meanwhile, the lips 112 and 114 compressed between the first and second members may bias the energizer 108 in a direction across the axial width of the seal 100, thus generating generally four biasing directions: two inward axial forces and two opposing outward axial forces. The force provided by the energizer 108 on either lip 112, 114 may be different than the force provided by the first or second members. It is noted that the described biasing forces may be indirectly applied to the energizer 108 in certain applications. Additionally, energizer 108 may operate within a wider temperature and pressure range than conventional energizers.

[0014] The seal 100 (including at least one of the jacket 102 or the energizer 108) may be formed from any suitable material in the sealing art. In certain embodiments, the seal 100 (including at least one of the jacket 102 or the energizer 108) may at least partially comprise a polymer. Polymers include polyketone, polyaramid, polyphenylene sulfide, polyethersulfone, polyphenylene sulfone, polyamide-imide, ultra-high molecular weight polyethylene, fluoropolymer, polybenzimidazole, polyacetal, polybutylene terephthalate (PBT), polypropylene (PP), polycarbonate (PC), acrylonitrile butadiene styrene (ABS), polyethylene terephthalate (PET), polyimide (PI), polyetherimide, polyetheretherketone (PEEK), polyethylene (PE), polysulfone, polyamide (PA), polyphenylene oxide, polyphenylene sulfide (PPS), polyurethane, polyester, liquid crystal polymer (LCP), The polymer may be selected from the group including a fluoropolymer (LCP), an elastomer, or any combination thereof. The polymer may be a thermoplastic polymer or a thermoset polymer. In one embodiment, the jacket 102 may include or consist essentially of a fluoropolymer.Exemplary fluoropolymers include polytetrafluoroethylene (PTFE), polyetheretherketone (PEEK), polyimide (PI), polyamide-imide (PAI), fluorinated ethylene propylene (FEP), polyvinylidene fluoride (PVDF), perfluoroalkoxy (PFA), terpolymers of tetrafluoroethylene, a hexafluoropropylene and vinylidene fluoride (THV), polychlorotrifluoroethylene (PCTFE), ethylene tetrafluoroethylene (ETFE) copolymers, ethylene chlorotrifluoroethylene (ECTFE) copolymers, or any combination thereof. Other fluoropolymers, polymers, and blends may be included in the composition of the jacket 102. In another particular embodiment, the seal 100 (including at least one of the jacket 102 or the energizer 108) can at least partially comprise, or even consist essentially of, polyethylene (PE), such as ultra-high-molecular-weight polyethylene (UHMWPE). In another particular embodiment, the seal 100 (including at least one of the jacket 102 or the energizer 108) can comprise a thermoplastic elastomeric hydrocarbon block copolymer, a polyether-ester block copolymer, a thermoplastic polyamide elastomer, a thermoplastic polyurethane elastomer, a thermoplastic polyolefin elastomer, a thermoplastic vulcanizate, an olefin-based copolymer, an olefin-based terpolymer, a polyolefin plastomer, or a combination thereof.In one embodiment, the seal 100 (including at least one of the jacket 102 or the energizer 108) may include a styrenic block copolymer, such as styrene-butadiene, styrene-isoprene, blends or mixtures thereof. Exemplary styrenic thermoplastic elastomers include triblock styrenic block copolymers (SBC), such as styrene-butadiene-styrene (SBS), styrene-isoprene-styrene (SIS), styrene-ethylene butylene-styrene (SEBS), styrene-ethylene propylene-styrene (SEPS), styrene-ethylene-ethylene-butadiene-styrene (SEEBS), styrene-ethylene-ethylene-propylene-styrene (SEEPS), styrene-isoprene-butadiene-styrene (SIBS), or combinations thereof. Commercially available examples include several grades of Kraton™ and Hybrar™ resins.In one embodiment, the seal 100 (including at least one of the jacket 102 or the energizer 108) may include an elastomer including at least one of acrylonitrile-butadiene (NBR), carboxylated nitrile (XNBR), ethylene acrylate (AEM, Vamac®), ethylene propylene rubber (EPR, EPDM), butyl rubber (IIR), chloroprene rubber (CR), fluorocarbon (FKM, FPM), fluorosilicone (FVMQ), hydrogenated nitrile (HNBR), perfluoroelastomer (FFKM), polyacrylate (ACM), polyurethane (AU, EU), silicone rubber (Q, MQ, VMQ, PVMQ), tetrafluoroethylene-propylene (AFLAS®) (FEPM).

[0015] In one embodiment, the seal 100 (including at least one of the jacket 102 or the energizer 108) may be treated, impregnated, filled, or coated with a lubricating material. Exemplary lubricating materials include molybdenum disulfide, tungsten disulfide, graphite, graphene, expanded graphite, boron nitride, talc, calcium fluoride, or any combination thereof. Additionally, the lubricating material may include alumina, silica, titanium dioxide, calcium fluoride, boron nitride, mica, wollastonite, silicon carbide, silicon nitride, zirconia, carbon black, pigments, or any combination thereof.

[0016] In one embodiment, the seal 100 (including at least one of the jacket 102 or the energizer 108) may at least partially comprise a metal. According to certain embodiments, the metal may include iron, copper, titanium, tin, aluminum, alloys thereof, or may be another type of metal. In one embodiment, the seal 100 (including at least one of the jacket 102 or the energizer 108) may include a metal (aluminum, zinc, copper, magnesium, tin, platinum, titanium, tungsten, iron, bronze, steel, energizer steel, stainless steel, etc.), a metal alloy (including the metals enumerated), anodized metal (including the metals enumerated), or any combination thereof.

[0017] As described above, the seal 100 may include a jacket 102. The jacket 102 may include a plurality of lips 112, 114 that define the annular recess 106. In certain instances, the lips 112 and 114 may extend from a heel 116 of the body 104. In certain embodiments, the lips 112 and 114 may extend from the heel 116 in generally the same direction relative to one another. In one embodiment, the first lip 112 may be located radially inward of the second lip 114 (e.g., the second lip 114 forms the outer diameter of the seal 100). In another particular embodiment, the lips 112 and 114 may extend parallel to one another. In an optional embodiment, either or both of the lips 112 and 114 may include a skived lip (not shown) adapted to provide a scraper interface for sealing against abrasive or viscous materials or environmental components such as dirt, debris, and environmental fluids. In certain embodiments, the heel 116 may be secured to hardware (eg, a valve housing or shaft) to prevent the seal 100 from rotating relative to the hardware in the assembly.

[0018] In one embodiment, the heel 116 of the jacket 102 may be generally straight or planar. That is, the heel 116 may lie generally along a plane with minimal surface waviness and deviation. In a more specific embodiment, the heel 116 of the jacket 102 may be planar. As described in more detail below, a flat or generally flat heel 116 of the jacket 102 may facilitate improved contact between adjacent seals, thereby providing better sealing characteristics. In one embodiment, the heel 116 may include an elongated heel portion 116a. In some embodiments, the elongated heel portion 116a may have a straight or polygonal cross-section. In some embodiments, the elongated heel portion 116a may have an arcuate cross-section. In some embodiments, the elongated heel portion 116a may be oriented substantially perpendicular to at least one of the first lip 112 or the second lip 114 along the central axis 1000. In some embodiments, the elongated heel portion 116a may have a straight end portion 116b. In some embodiments, the elongated heel portion 116a may have a straight end portion 116b that forms three, four, five, six, seven, or even more polygonal sides. In some embodiments, the elongated heel portion 116a may have an arcuate end portion 116b. The heel 116 may include a heel head portion 116c that extends along a central axis 1000. The heel head portion 116c may extend parallel to the central axis 1000. In some embodiments, the heel head portion 116c may have a straight or polygonal cross section. In some embodiments, the heel head portion 116c may form three, four, five, six, seven, or even more polygonal sides. In some embodiments, the heel head portion 116c may have an arcuate cross section. In some embodiments, the heel head portion 116c may have a straight or polygonal portion that is proximate to the first lip 112. In some embodiments, the heel head portion 116c can have an arcuate portion adjacent the second lip 114.

[0019] In an embodiment, at least one of the lips 112 and 114 may have a generally flat profile extending from the heel 116. In one embodiment, at least one of the lips 112 and 114 may include a bulge extending outward from the respective lip 112 or 114 in a direction away from the annular recess 106, resulting in an arch shape. The bulge may extend the entire circumference of the seal 100. Similar to the skived lip described above, the bulge may prevent material from entering or exiting while exhibiting lower frictional resistance. In another embodiment, one of the lips 112 or 114 may include a skived lip and the other lip 112 or 114 may include a bulge. In one embodiment, at least one of the lips 112 and 114 may include a straight or planar shape. As shown in FIG. 1, in one embodiment, the first lip 112 can include a bulge extending outward from the lip 112 in a direction away from the annular recess 106, resulting in an arcuate shape and an outer portion 112a that can be partially or entirely arcuate. The first lip 112 can also include an arcuate inner portion 112b toward the recess. As shown in FIG. 1, in one embodiment, the second lip 114 can include a straight outer portion 114a that can be partially or entirely straight. The straight outer portion 114a can be planar and extend the entire length of the second lip 114. The straight outer portion 114a can be parallel to the central axis 1000 of the seal 100. The second lip 114 can also include an arcuate inner portion 114b toward the recess.

[0020] As shown, the lips 112 and 114 of the jacket 102 may bend outwardly after installation of the energizer 108. After installation of the energizer 108, at least one of the lips 112 and 114 may be at least partially arcuate when viewed in cross section and biased outwardly by a biasing force provided by the energizer 108. After installation of the energizer 108, at least one of the lips 112 and 114 may be straight or planar when viewed in cross section and biased outwardly by a biasing force provided by the energizer 108 or an adjacent component. As shown in FIG. 1, the first lip 112 may include an arcuate profile (e.g., an arcuate inner portion) along its interior portion 112b (facing the recess 106) and an arcuate profile 112a (e.g., an arcuate outer portion) along its exterior portion (facing an adjacent component). 1, the second lip 114 may include an arcuate profile (e.g., an arcuate inner portion) along its interior portion 114b (facing the recess 106) and a planar, straight, or flat profile (e.g., a straight outer portion) along its exterior portion 114a (facing the adjacent component). In some embodiments, the entire inner portion of the first lip 112 or second lip 114 may be arcuate.

[0021] In one embodiment, the outer portion of the first lip 112 has a radius of curvature R FE In some embodiments, the outer portion of the first lip 112 may have a radius of curvature R, which may be positive. FE In some embodiments, the outer portion of the first lip 112 may have a radius of curvature R that may be greater than 0.1, such as greater than 0.5, such as greater than 1, such as greater than 2, such as greater than 5, such as greater than 10, such as greater than 20, such as greater than 25, such as greater than 50, such as greater than 100, or such as greater than 200. FE In some embodiments, the outer portion of the first lip 112 may have a radius of curvature R, which may be negative. FEIn some embodiments, the outer portion of the first lip 112 may have a radius of curvature R which may be less than −0.1, such as less than −0.5, such as less than −1, such as less than −2, such as less than −5, such as less than −10, such as less than −20, such as less than −25, such as less than −50, such as less than −100, or such as less than −200. FE The outer portion of the first lip 112 may have a radius of curvature R, which may be any value between any of the minimum and maximum values ​​listed above. FE It will be further appreciated that the outer portion of the first lip 112 may have a radius of curvature R that may vary along its circumference and length. FE It can also be understood that the

[0022] In one embodiment, the inner portion of the first lip 112 has a radius of curvature R FI In some embodiments, the inner portion of the first lip 112 may have a radius of curvature R, which may be positive. FI In some embodiments, the inner portion of the first lip 112 may have a radius of curvature R that may be greater than 0.1, such as greater than 0.5, such as greater than 1, such as greater than 2, such as greater than 5, such as greater than 10, such as greater than 20, such as greater than 25, such as greater than 50, such as greater than 100, or such as greater than 200. FI In some embodiments, the inner portion of the first lip 112 may have a radius of curvature R, which may be negative. FI In some embodiments, the inner portion of the first lip 112 may have a radius of curvature R which may be less than −0.1, such as less than −0.5, such as less than −1, such as less than −2, such as less than −5, such as less than −10, such as less than −20, such as less than −25, such as less than −50, such as less than −100, or such as less than −200. FI The inner portion of the first lip 112 may have a radius of curvature R, which may be any value between any of the minimum and maximum values ​​listed above. FI It will be further appreciated that the inner portion of the first lip 112 may have a radius of curvature R that may vary along its circumference and length. FI It can also be understood that the

[0023] In one embodiment, the seal 100 has a radius of curvature R of an outer portion of the first lip 112 that is at least 1:1, such as 2:1, such as 3:1, such as 4:1, such as 5:1, such as 10:1, such as 12:1, such as 15:1, such as 25:1, or such as 50:1. FE and the radius of curvature R of the inner portion of the first lip 112 FI Ratio to FE :R FI The outer portion of the first lip 112 may have a radius of curvature R FE and the radius of curvature R of the inner portion of the first lip 11 FI Ratio to FE: R FI It will be further understood that the radius of curvature R of the outer portion of the first lip 112 may be any value between any of the minimum and maximum values ​​listed above. FE and the radius of curvature R of the inner portion of the first lip 112 FI The ratio to (R FE: R FI ), it will also be understood that the diameter of the slit 14 may vary along its circumference and length.

[0024] In one embodiment, at least one of the first lip 112 or the second lip 114 may include an inwardly directed extension. In some embodiments, the extension may be arcuate when viewed in cross section. In some embodiments, the extension may be straight or planar when viewed in cross section. The extension may include an edge on the inside of the extension within the annular recess 106. In one embodiment, at least one of the first lip 112 or the second lip 114 may include an edge 112c, 114c. The edge 112c, 114c of at least one of the first lip 112 or the second lip 114 may be straight. In some embodiments, the edge 112c, 114c of at least one of the first lip 112 or the second lip 114 may be straight and form three, four, five, six, seven, or even more polygonal sides. As shown in FIG. 1, the first lip 112 may include two arcuate sides and at least one or two straight sides forming an edge 112c. As shown in FIG. 1, the second lip 114 may include three straight sides forming an edge 114c. At least one edge 112c, 114c of the first lip 112 or the second lip 114 may be arcuate. At least one edge 112c, 114c of the first lip 112 or the second lip 114 may be perpendicular to the central axis 1000, as best shown in the edge 112c of the first lip 112 in FIG. 1. At least one edge 112c, 114c of the first lip 112 or the second lip 114 may be tapered relative to the central axis 1000, as best shown in the edge 114c of the second lip 114 in FIG. 1. 1, the edge 114c of the second lip 114 may be tapered at α relative to the central axis 1000, where α is less than 90°, e.g., less than 75°, e.g., less than 60°, e.g., less than 45°, or e.g., less than 30°. In one embodiment, the edge 112c of the first lip 112 may form a similar angle (not shown). In one embodiment, at least one edge 112c, 114c of the first lip 112 or the second lip 114 may have an inner portion 112b, 114b that is at least partially parallel to the central axis 1000.

[0025] In one embodiment, the jacket 102 has a length L of at least 0.1 mm, at least 0.5 mm, at least 1 mm, at least 5 mm, at least 10 mm, at least 25 mm, at least 50 mm, at least 75 mm, at least 100 mm, at least 150 mm, at least 250 mm, at least 500 mm. J The jacket 102 may have a length L which may be 1500 mm or less or 1000 mm or less. J In some embodiments, the jacket 102 may have a length L between 0.5 mm and 10 mm. J The jacket 102 may have a length L which may be any value between any of the minimum and maximum values ​​listed above. J It will be further appreciated that the jacket 102 may have a length L which may vary around its circumference. J It may also be appreciated that in some embodiments, the jacket 102 may have a total length L S The length L can be the same as J may have:

[0026] In one embodiment, the jacket 102 has a width W of at least 0.1 mm, at least 0.5 mm, at least 1 mm, at least 5 mm, at least 10 mm, at least 25 mm, at least 50 mm, at least 75 mm, at least 100 mm, at least 150 mm, at least 250 mm, at least 500 mm. J The jacket 102 may have a width W which may be 1500 mm or less or 1000 mm or less. J In some embodiments, the jacket 102 may have a width W of 0.5 mm to 40 mm. J The jacket 102 may have a width W which may be any value between any of the minimum and maximum values ​​listed above. J It will be further appreciated that the jacket 102 may have a width W which may vary around its circumference. J It may also be appreciated that in some embodiments, the jacket 102 may have an overall width W S Width W, which can be the same asJ may have:

[0027] In one embodiment, the first lip 112 has a length L of at least 0.1 mm, at least 0.3 mm, at least 1 mm, at least 5 mm, at least 10 mm, at least 25 mm, at least 50 mm, at least 75 mm, at least 100 mm, at least 150 mm, at least 250 mm, at least 500 mm. FL The first lip 112 may have a length L which may be 1500 mm or less or 1000 mm or less. FL In some embodiments, the first lip 112 may have a length L of 0.3 mm to 10 mm. FL The first lip 112 may have a length L which may be any value between any of the minimum and maximum values ​​listed above. FL It will be further appreciated that the first lip 112 may have a length L which may vary around its circumference. FL It can also be understood that the

[0028] In one embodiment, the first lip 112 has a thickness W of at least 0.01 mm, at least 0.1 mm, at least 1 mm, at least 5 mm, at least 10 mm, at least 25 mm, at least 50 mm, at least 75 mm, at least 100 mm, at least 150 mm, at least 250 mm, at least 500 mm. FL The first lip 112 may have a thickness W which may be 1500 mm or less, 1000 mm or less. FL In some embodiments, the first lip 112 may have a thickness W of 0.1 mm to 1 mm. FL The first lip 112 may have a thickness W which may be any value between any of the minimum and maximum values ​​listed above. FL It will be further appreciated that the first lip 112 may have a thickness W that may vary around its circumference. FL It can also be understood that the

[0029] In one embodiment, the first lip 112 has a length L of at least 2:1, such as 3:1, such as 4:1, such as 5:1, such as 10:1, such as 12:1, such as 15:1, such as 25:1, or such as 50:1. FL and thickness W FL The first lip 112 may have a length L FL and thickness W FL It will be further understood that the first lip 112 may have a length L which may vary around its circumference, and may have a ratio of L to any value between any of the minimum and maximum values ​​listed above. FL and thickness W FL It can also be understood that the ratio of

[0030] In one embodiment, the second lip 114 has a length L of at least 0.1 mm, at least 0.3 mm, at least 1 mm, at least 5 mm, at least 10 mm, at least 25 mm, at least 50 mm, at least 75 mm, at least 100 mm, at least 150 mm, at least 250 mm, at least 500 mm. SL The second lip 114 may have a length L which may be 1500 mm or less or 1000 mm or less. SL In some embodiments, the second lip 114 may have a length L of 0.3 mm to 10 mm. SL The second lip 114 may have a length L which may be any value between any of the minimum and maximum values ​​listed above. SL It will be further appreciated that the second lip 114 may have a length L which may vary around its circumference. SL It can also be understood that the

[0031] In one embodiment, the second lip 114 has a thickness W of at least 0.01 mm, at least 0.1 mm, at least 1 mm, at least 5 mm, at least 10 mm, at least 25 mm, at least 50 mm, at least 75 mm, at least 100 mm, at least 150 mm, at least 250 mm, at least 500 mm. SL The second lip 114 may have a thickness W which may be 1500 mm or less or 1000 mm or less.SL In some embodiments, the second lip 114 may have a thickness W of 0.1 mm to 1 mm. SL The second lip 114 may have a thickness W which may be any value between any of the minimum and maximum values ​​listed above. SL It will be further appreciated that the second lip 114 may have a thickness W that may vary around its circumference. SL It can also be understood that the

[0032] In one embodiment, the second lip 114 has a length L of at least 2:1, such as 3:1, such as 4:1, such as 5:1, such as 10:1, such as 12:1, such as 15:1, such as 25:1, or such as 50:1. SL and thickness W SL The second lip 114 may have a length L SL and thickness W SL It will be further understood that the second lip 114 may have a length L which may vary around its circumference, and may have a ratio of L to L, or may be any value between any of the minimum and maximum values ​​listed above. SL and thickness W SL It can also be understood that the thickness of the two lips 112, 114 may have a ratio of 1:1, 1:2, 1:3, 1:4, 1:5, 1:6, 1:7, 1:8, 1:9, 1:10, 1:11, 1:22, 1:32, 1:4, 1:5, 1:6, 1:7, 1:8, 1:9, 1

[0033] In one embodiment, the heel 116 has a length L of at least 0.1 mm, at least 0.2 mm, at least 1 mm, at least 5 mm, at least 10 mm, at least 25 mm, at least 50 mm, at least 75 mm, at least 100 mm, at least 150 mm, at least 250 mm, at least 500 mm. H The heel 116 may have a length L which may be 1500 mm or less or 1000 mm or less. H In some embodiments, the heel 116 may have a length L between 0.2 mm and 10 mm. H The heel 116 may have a length L which may be any value between any of the minimum and maximum values ​​listed above. H It will be further appreciated that the heel 116 may have a length L which may vary around its circumference.H It can also be understood that the

[0034] In one embodiment, the heel 116 has a thickness W of at least 0.1 mm, at least 0.5 mm, at least 1 mm, at least 5 mm, at least 10 mm, at least 25 mm, at least 50 mm, at least 75 mm, at least 100 mm, at least 150 mm, at least 250 mm, at least 500 mm. H The heel 116 may have a thickness W which may be 1500 mm or less or 1000 mm or less. H In some embodiments, the heel 116 may have a thickness W of 0.5 mm to 40 mm. H The heel 116 may have a thickness W which may be any value between any of the minimum and maximum values ​​listed above. H It will be further appreciated that the heel 116 may have a thickness W which may vary around its circumference. H It can also be understood that the

[0035] 1, the energizer 108 can be at least partially disposed within the annular recess 106 of the jacket 102. The energizer 108 may be an axially oriented energizer within the annular recess 106 of the jacket 102. In one embodiment, the energizer 108 may be disposed along, adjacent, or immediately adjacent to the first lip 112. In one embodiment, the energizer 108 may be disposed along, adjacent, or immediately adjacent to the second lip 114.

[0036] 1, the energizer 108 may be a coil spring circumferentially oriented within the recess 106 of the jacket 102. The coil spring energizer 108 may have a rectilinear, polygonal, elliptical, or arcuate cross-sectional profile. In one embodiment, the energizer 108 may have a diameter that is less than 150% of the depth of the annular recess 106, such as less than 100% of the depth of the annular recess 106, or less than 75% of the depth of the annular recess 106. In one embodiment, the diameter of the energizer 108 may be 10% or more of the depth of the annular recess 106.

[0037] In one embodiment, the energizer 108 has a length L of at least 0.1 mm, at least 1 mm, at least 5 mm, at least 10 mm, at least 25 mm, at least 50 mm, at least 75 mm, at least 100 mm, at least 150 mm, at least 250 mm, at least 500 mm. S The energizer 108 may have a length L which may be 1500 mm or less or 1000 mm or less. S In some embodiments, the energizer 108 may have a length L between 0.3 mm and 6 mm. S The energizer 108 may have a length L which may be any value between any of the minimum and maximum values ​​listed above. S It will be further appreciated that the energizer 108 may have a length L that may vary around its circumference. S It can also be understood that the

[0038] In one embodiment, the energizer 108 has a thickness W of at least 0.1 mm, at least 1 mm, at least 5 mm, at least 10 mm, at least 25 mm, at least 50 mm, at least 75 mm, at least 100 mm, at least 150 mm, at least 250 mm, at least 500 mm. S The energizer 108 may have a thickness W which may be 1500 mm or less or 1000 mm or less. S In some embodiments, the energizer 108 may have a thickness W of 0.3 mm to 6 mm. SThe energizer 108 may have a thickness W which may be any value between any of the minimum and maximum values ​​listed above. S It will be further appreciated that the energizer 108 may have a thickness W that may vary around its circumference. S It can also be understood that the

[0039] The energizer 108 may be arcuate when viewed in cross section. In some embodiments, the energizer 108 may be linear or planar when viewed in cross section. As shown in FIG. 1 , the energizer 108 may contact at least one of the lips 112, 114 of the jacket 102. In one embodiment, the energizer 108 may contact substantially the entirety of at least one of the lips 112, 114 in the axial direction. In one embodiment, the energizer 108 may contact at least one of the lips 112, 114 of the jacket 102. In one embodiment, the energizer 108 may contact substantially the entirety of at least one of the lips 112, 114 of the jacket 102.

[0040] As contemplated in at least one embodiment described herein, the energizer 108 can include a length of material formed into a helical energizer having multiple coils. In one embodiment, the energizer 108 can include at least two coils, such as at least three coils, at least four coils, at least five coils, at least ten coils, at least one hundred coils, at least two hundred coils, at least three hundred coils, at least four hundred coils, at least five hundred coils, or at least one thousand coils. The length of material forming the energizer 108 can have a polygonal or elliptical cross section. For example, in one embodiment, the energizer 108 can be formed from a round wire. In another embodiment, the energizer 108 can be formed from a ribbon of material wound into multiple coils. The coils of the energizer 108 can be adjacent to one another or can overlap. In certain cases, the coils can be parallel to one another. In other cases, the coils can be angled with respect to one another. That is, the coils may be angularly offset and angled relative to one another.

[0041] In the relaxed state, the energizer 108 may have a generally circular cross-section. That is, the energizer 108 may be a helical energizer, as described above. In other embodiments, the energizer 108 may define a generally polygonal cross-sectional profile. In a more specific embodiment, the energizer 108 may have a generally T-shaped cross-sectional profile. In another embodiment, the energizer 108 may have an elliptical cross-section. For example, in an embodiment not shown, the energizer 108 may have an oval or circular cross-sectional profile. In yet another embodiment, the cross-section of the energizer 108 may be partially elliptical and partially polygonal. That is, the cross-section of the energizer 108 may have linear and arcuate portions. The wire forming the coil of the energizer 108 may be rectangular, square, circular, elliptical, or keystone in cross-section. The wire forming the coil of the spring 108 may rotate with a pitch of 0.025 mm to 25.4 mm, for example 0.1 mm to 3 mm. The wire forming the coil of the spring 108 may have a wire diameter of 0.025 mm to 25.4 mm, for example 0.05 mm to 0.6 mm. The wire forming the coil of the spring 108 may have a spring diameter of 0.05 mm to 1500 mm, for example 0.5 mm to 20 mm.

[0042] In one embodiment, the energizer 108 may extend around the entire circumference of the seal 100. In a more specific embodiment, the energizer 108 may have a uniform shape and material properties around the entire circumference of the seal 100. In another more specific embodiment, the energizer 108 may have a variety of shapes or material selections around the circumference of the seal 100. In another embodiment, the energizer 108 may extend around only a portion of the circumference of the seal 100. In a more specific embodiment, the energizer 108 may comprise multiple energizers 108 at least partially spaced apart from one another. In such an embodiment, there may be a circumferential space between adjacent energizers 108.

[0043] The energizer 108 can at least partially include or even consist essentially of a metal, such as steel, or even more specifically, energizer steel. The metal can be coated or surface treated to prevent corrosion or other undesirable effects from environmental exposure. In another embodiment, the energizer 108 can at least partially include or even consist essentially of, for example, Eligloy, Inconel, Hastelloy, or combinations thereof.

[0044] In yet another embodiment, the energizer 108 can include cobalt, chromium, nickel, iron, molybdenum, manganese, beryllium copper, or combinations thereof. In certain embodiments, the energizer 108 can include at least 10% cobalt by weight, such as at least 20% cobalt by weight, at least 25% cobalt by weight, at least 30% cobalt by weight, at least 35% cobalt by weight, or even at least 40% cobalt by weight. The energizer 108 can have a yield strength of less than 1200 MPa, such as less than 1100 MPa, less than 1000 MPa, or even less than 900 MPa. In certain examples, the energizer 108 can be heat treated or surface treated to improve its properties.

[0045] The energizer 108 may provide a biasing force against the jacket 102. Specifically, the energizer 108 contacts at least one of the first lip 112 or the second lip 114 and exerts an outward biasing force F thereagainst. E In certain embodiments, the biasing force F of the energizer 108 against the lips 112, 114 may be provided. E may be at least 0.001 N / mm, such as at least 0.01 N / mm, or such as at least 0.3 N / mm. Emay be less than 5000 N / mm, less than 1000 N / mm, less than 500 N / mm, less than 400 N / mm, less than 300 N / mm, less than 200 N / mm, less than 100 N / mm, less than 50 N / mm, less than 20 N / mm, or even less than 10 N / mm. In some embodiments, the biasing force F against the first lip 112 E is the biasing force F against the second lip 114 E may be different from.

[0046] FIG. 2A includes a cross-sectional perspective view of a seal pre-assembly according to one embodiment. FIG. 2B includes a cross-sectional perspective view of a seal assembly according to one embodiment. Although FIGS. 2A-2B show the seal 200 in an axial orientation, the seal 200 can be oriented in any potential orientation, including a radial or facial sealing orientation. The seal 200 can have the same components as described above with respect to FIG. 1. As shown in FIG. 2A, the seal 200 can be positioned between a first member 202 and a second member 204 in a seal assembly 2000 below a central axis 1000. The first member 202 can be a housing. The second member 204 can be a shaft. At least one of the first member 202 or the second member 204 can act relative to the seal 200 or at least one of the other of the first member 202 or the second member 204. The actuation can be a rotational, radial, or axial movement. The components of the seal 200 in Figure 2 may be the same as those described above in Figure 1. In one embodiment, at least one of the first lip 212 or the second lip 214 may be static within the seal assembly, while the other of the first lip 212 or the second lip 214 may be dynamic within the seal assembly. Additionally, the first member 202 may be made of a material having different material or mechanical properties (e.g., a different coefficient of expansion than the second member 204, or vice versa).

[0047] In some embodiments, the seal 200 may be fitted within a seal assembly 2000 including a UHPLC or HPLC pump assembly. In these embodiments, the seal 200 may be small in size according to the ranges above, having a length of 0.5-5 mm and a width of 0.5-20 mm. In these embodiments, the first member 202 or the second member 204 may have a diameter of less than 2 mm, such as less than 1 mm, such as less than 0.5 mm. Furthermore, in these assemblies, the cyclic pressure may be less than 250 MPa, such as less than 200 MPa, less than 150 MPa, or less than 100 MPa. Furthermore, as shown in FIG. 2A, the first member 202 and the second member 204 may have a first configuration, and as shown in FIG. 2B, the first member 202 and the second member 204 may have a second configuration. As shown, the seal 200 may expand to fit within the members 202, 204 between the first and second configurations. In some embodiments, FIG. 2B may show a second configuration that may indicate seal deformation of seal 200 after 100 pumping cycles.

[0048] The seal 200 exerts a biasing contact force F against at least one of the first member 202 or the second member 204. S Specifically, the seal 200 may provide a biasing force F against at least one of the first member 202 or the second member 204. S In certain embodiments, the seal 200 can provide a biasing force F against at least one of the first member 202 or the second member 204. S may be provided, which may be at least 0.001 N / mm, such as at least 0.01 N / mm. S may be less than 5000 N / mm, such as less than 1000 N / mm, such as less than 500 N / mm, less than 400 N / mm, less than 300 N / mm, less than 200 N / mm, less than 100 N / mm, less than 50 N / mm, less than 25 N / mm, or even less than 10 N / mm. In some embodiments, the seal 200 applies a biasing force F of between 0.3 N / mm and 150 N / mm to at least one of the first member 202 or the second member 204. SIn some embodiments, a biasing force F on the first member 202 may be provided. S is the biasing force F on the second member 204 Ss may be different from.

[0049] In one embodiment, the energizer biasing force F on at least one of the first lips E and a biasing force F of the seal against at least one of the first member or the second member. S may be 1:1 or less, such as 1:2 or less, such as 1:3 or less, such as 1:4 or less, such as 1:5 or less, such as 1:10 or less, such as 1:12 or less, such as 1:15 or less, such as 1:25 or less, or such as 1:50 or less. E :F S It should be understood that the ratio of F may be any value between any of the minimum and maximum values ​​listed above. E :F S It can also be appreciated that may vary around the circumference.

[0050] The seal 200 may have a contact area on at least one of the first member 202 or the second member 204. In certain embodiments, the seal 200 may have a contact area on at least one of the first member 202 or the second member 204 that is at least 0.1% of the total area of ​​the seal 200. In another embodiment, the contact area on at least one of the first member 202 or the second member 204 is at least 0.1% of the total area of ​​the seal 200, such as at least 0.5%, such as at least 1%, such as at least 2.5%, such as at least 5%, such as at least 10%, such as at least 15%, such as at least 20%, such as at least 25%, such as at least 30%, such as at least 35%, such as at least 40%, such as at least 45%, such as at least 50%, such as at least 55%, such as at least 60%, such as at least 65%, such as at least 70%, such as at least 75%, or such as at least 80% of the total area of ​​the seal 200.

[0051] The seal 200 may have a second lip 114 having a contact area on at least one of the first member 202 or the second member 204. In certain embodiments, the second lip 114 may have a contact area on at least one of the first member 202 or the second member 204 that is at least 0.1% of the total surface area of ​​the second lip 114. In another embodiment, the contact area of ​​the second lip 114 on at least one of the first member 202 or the second member 204 is at least 0.1% of the total surface area of ​​the second lip 114, such as at least 0.5%, such as at least 1%, such as at least 2.5%, such as at least 5%, such as at least 10%, such as at least 15%, such as at least 20%, such as at least 25%, such as at least 30%, such as at least 35%, such as at least 40%, such as at least 45%, such as at least 50%, such as at least 55%, such as at least 60%, such as at least 65%, such as at least 70%, such as at least 75%, or such as at least 80% of the total surface area of ​​the second lip 114. The seal 200 may have a first lip 112 having a contact area on at least one of the first member 202 or the second member 204. In certain embodiments, the first lip 112 may have a contact area on at least one of the first member 202 or the second member 204 that is at least 0.1% of the total surface area of ​​the first lip 112 .

[0052] In another embodiment, the contact area of ​​the second lip 114 on at least one of the first member 202 or the second member 204 is at least 0.1% of the total surface area of ​​the first lip 112, for example at least 0.5%, such as at least 1%, for example at least 2.5%, such as at least 5%, for example at least 10%, for example at least 15%, such as at least 20%, for example at least 25%, for example at least 30%, for example at least 35%, such as at least 40%, for example at least 45%, for example at least 50%, for example at least 55%, such as at least 60%, for example at least 65%, for example at least 70%, for example at least 75%, or for example at least 80% of the total surface area of ​​the first lip 112.

[0053] The seal 100 may form an assembly that may be utilized in bi-directional pressure applications. The seal 100 may be oriented against and prevent leakage of fluid in a forward axial direction, or the seal 100 may be oriented against and prevent leakage of fluid in an aft axial direction down the central axis 1000. The seal 100 may be oriented against and protect against leakage of fluid in an inward direction, or the seal 100 may be oriented against and protect against leakage of fluid in an outward direction in a direction perpendicular to the central axis 300. In this regard, the seal 100 may be selected to have particular properties that allow for effective sealing in those particular orientations. Particular suitable applications include valves, pistons, bi-directional couplings, and other moving components that require sealing therebetween. Particularly suitable applications may include UHPLC or HPLC pump assemblies.

[0054] Seals described in accordance with embodiments herein may enable components of the seal to have a longer life due to properly positioned forces that reduce repeated compression and stress on individual components (e.g., energizer, jacket) due to vibration or actuation of the seal or other components in the assembly. Additionally, seals described in accordance with embodiments herein may prevent seal deformation under low and high cyclic pressure cycles. As a result, the life of the components and the seal itself may be improved, and overall leakage may be reduced.

[0055] Many different aspects and embodiments are possible. Some of these aspects and embodiments are described below. After reading this specification, a person skilled in the art will understand that these aspects and embodiments are merely illustrative and do not limit the scope of the invention. An embodiment may be along any one or more of the items listed below.

[0056] Embodiment 1. A seal comprising: an annular jacket comprising a body having an elongated heel, a first lip, and a second lip defining an annular recess, the first lip having an arcuate outer portion and the second lip having a straight outer portion and a straight tapered edge; and an annular energizer disposed within the annular recess adjacent at least one of the first lip and the second lip.

[0057] Embodiment 2. A seal assembly comprising a first member, a second member, and a seal disposed between the first member and the second member, the seal comprising an annular jacket having a body with an elongated heel, a first lip, and a second lip defining an annular recess, the second lip having a straight tapered edge; and an annular energizer disposed within the annular recess, the second lip contacting at least one of the first member or the second member over more than 0.1% of a surface area of ​​the second lip.

[0058] Embodiment 3. A seal assembly including a first member, a second member, and a seal disposed between the first member and the second member, the seal comprising an annular jacket having a body including an elongated heel, a first lip, and a second lip defining an annular recess, the second lip having a straight tapered edge; and an annular energizer disposed within the annular recess, wherein a pressure applied to a surface area of ​​the second lip is less than 250 MPa.

[0059] Embodiment 4. A seal or seal assembly according to any one of embodiments 1 to 3, wherein the seal comprises an elongated heel oriented substantially perpendicular to at least one of the first lip or the second lip.

[0060] Embodiment 5. A seal or seal assembly according to any one of embodiments 1 to 4, wherein the entire first lip comprises an arcuate outer portion.

[0061] Embodiment 6. A seal or seal assembly according to any one of embodiments 1 to 5, wherein the entire second lip has a straight outer portion.

[0062] Embodiment 7. A seal or seal assembly according to any one of embodiments 1 to 6, wherein the energizer provides a radial biasing force of 0.3 to 20 N / mm against the first lip or the second lip.

[0063] Embodiment 8. A seal or seal assembly according to any one of embodiments 1 to 7, wherein the seal provides a radial biasing force against the first member or the second member of between 0.3 and 150 N / mm.

[0064] Embodiment 9. A seal or seal assembly as described in any one of embodiments 1 to 8, wherein the straight tapered edge of the second lip forms an angle α, where α is less than 90°, such as less than 75°, such as less than 60°, such as less than 45°, or such as less than 30°.

[0065] Embodiment 10. A seal or seal assembly according to any one of embodiments 1 to 9, wherein at least one of the first lip or the second lip is static within the seal assembly.

[0066] Embodiment 11. A seal or seal assembly according to any one of embodiments 1 to 10, wherein at least one of the first lip or the second lip is dynamic within the seal assembly.

[0067] Embodiment 12. A seal or seal assembly according to any one of embodiments 1 to 11, wherein the first lip comprises an arcuate inner portion.

[0068] Embodiment 13. A seal or seal assembly according to any one of embodiments 1 to 12, wherein the second lip comprises an arcuate inner portion.

[0069] Embodiment 14. A seal or seal assembly described in any one of embodiments 1 to 13, wherein the first lip is located radially inward of the second lip.

[0070] Embodiment 15. A seal or seal assembly according to any one of embodiments 1 to 14, wherein the energizer is a coil spring.

[0071] Embodiment 16. A seal or seal assembly as described in embodiment 15, wherein the energizer rotates at a pitch of 0.1 mm to 3 mm.

[0072] Embodiment 17. A seal or seal assembly as described in embodiment 15, wherein the energizer has a wire diameter of 0.05 mm to 0.6 mm.

[0073] Embodiment 18. A seal or seal assembly as described in embodiment 15, wherein the energizer has an energizer diameter of 0.5 mm to 20 mm.

[0074] Embodiment 19. A seal or seal assembly according to any one of embodiments 1 to 18, wherein the energizer has a rectangular, square, or keystone cross-section wire.

[0075] Embodiment 20. A seal or seal assembly according to any one of embodiments 1 to 19, wherein the energizer has a circular cross-section wire.

[0076] Embodiment 21. A seal or seal assembly according to any one of embodiments 1 to 20, wherein the energizer comprises a metal.

[0077] Embodiment 22. A seal or seal assembly according to any one of embodiments 1 to 21, wherein the energizer comprises a polymer.

[0078] Embodiment 23. A seal or seal assembly according to any one of embodiments 1 to 22, wherein the jacket comprises a metal.

[0079] Embodiment 24. A seal or seal assembly according to any one of embodiments 1 to 23, wherein the jacket comprises a polymer.

[0080] Embodiment 25. A seal or seal assembly as described in embodiment 4, wherein the elongated heel forms a straight edge with the second lip.

[0081] Embodiment 26. A seal or seal assembly as described in embodiment 4, wherein the elongated heel forms an arcuate edge with the second lip.

[0082] Embodiment 27. The seal has a length L of 0.5 mm to 10 mm. S 27. The seal or seal assembly of any one of the preceding embodiments, having

[0083] Embodiment 28. The seal has a width W of 0.5 mm to 40 mm. S 28. The seal or seal assembly of any one of the preceding embodiments, having

[0084] Embodiment 29. The elongated heel has a width W of 0.5 mm to 40 mm. H 29. The seal or seal assembly of any one of the preceding embodiments, comprising:

[0085] Embodiment 30. The first lip has a length L of 0.3 mm to 10 mm. FL 30. The seal or seal assembly of any one of embodiments 1 to 29, comprising:

[0086] Embodiment 31. The first lip has a width W of 0.1 mm to 1 mm. FL 31. The seal or seal assembly of any one of the preceding embodiments, comprising:

[0087] Embodiment 32. The second lip has a length L of 0.3 mm to 10 mm. SL 32. The seal or seal assembly of any one of the preceding embodiments, comprising:

[0088] Embodiment 33. The second lip has a width W of 0.1 mm to 1 mm. SL 33. The seal or seal assembly of any one of the preceding embodiments, having

[0089] Embodiment 34. The first lip has a length L FL Width W varies along FL 34. The seal or seal assembly of any one of the preceding embodiments, having a

[0090] Embodiment 35. The first lip has an outer radius of curvature R FE and the inner radius of curvature R FI and R FE / R FI 35. The seal or seal assembly of any one of embodiments 1 to 34, wherein is greater than 1.

[0091] Embodiment 36. A seal or seal assembly described in any one of embodiments 1 to 35, wherein at least one of the first member or the second member has a diameter of less than 2 mm.

[0092] Embodiment 37. A seal or seal assembly according to any one of embodiments 1 to 36, wherein the assembly is a UHPLC or HPLC pump assembly.

[0093] Embodiment 38. A seal or seal assembly according to any one of embodiments 1 to 37, wherein the assembly has a cyclic pressure of less than 250 MPa.

[0094] It should be noted that not all of the above features are required, some of the specific features may not be required, and one or more features may be provided in addition to the features described. Still further, the order in which the features are listed is not necessarily the order in which the features are introduced.

[0095] Certain features that are, for clarity, described herein in the context of separate embodiments, may also be provided in combination in a single embodiment. Conversely, various features that are, for brevity, described in the context of a single embodiment, may also be provided separately or in any subcombination.

[0096] Benefits, other advantages, and solutions to problems have been described above with respect to specific embodiments. However, the benefits, advantages, solutions to problems, and any feature or features that may provide or make more prominent any benefit, advantage, or solution should not be construed as a critical, necessary, or essential feature of any or all of the claims.

[0097] The specification and illustrations of the embodiments described herein are intended to provide a general understanding of the structure of the various embodiments. The specification and illustrations are not intended to serve as an exhaustive and comprehensive description of all elements and features of the apparatus and systems that use the structures or methods described herein. Separate embodiments may be provided in combination in a single embodiment, and conversely, various features that are described in the context of a single embodiment for brevity may be provided separately or in any subcombination. Furthermore, references to values ​​described in ranges include any and all values ​​within that range. Many other embodiments may become apparent to those skilled in the art only after reading this specification. Other embodiments may be used and derived from this disclosure, such that structural substitutions, logical substitutions, or any changes may be made without departing from the scope of this disclosure. Thus, this disclosure should be considered as illustrative, not restrictive.

Claims

1. A seal, an annular jacket comprising a body including a first lip and a second lip defining an annular recess, the first lip including an arcuate outer portion and the second lip including a straight outer portion and a straight tapered edge; an annular energizer disposed within the annular recess adjacent at least one of the first lip and the second lip.

2. 1. A seal assembly comprising: A first member; A second member; and a seal disposed between the first member and the second member, the seal comprising: an annular jacket comprising a body including a first lip and a second lip defining an annular recess, the second lip including a linear tapered edge; an annular energizer disposed within the annular recess, wherein the second lip contacts at least one of the first member or the second member over greater than 0.1% of a surface area of ​​the second lip.

3. 1. A seal assembly comprising: A first member; A second member; and a seal disposed between the first member and the second member, the seal comprising: an annular jacket comprising a body including a first lip and a second lip defining an annular recess, the second lip including a linear tapered edge; an annular energizer disposed within the annular recess, wherein a pressure applied to a surface area of ​​the second lip is less than 250 MPa.

4. A seal or seal assembly according to any preceding claim, wherein the seal comprises an elongated heel oriented substantially perpendicular to at least one of the first lip or the second lip.

5. A seal or seal assembly according to any preceding claim, wherein the entire first lip comprises an arcuate outer portion.

6. A seal or seal assembly according to any preceding claim, wherein the entire second lip comprises a straight outer portion.

7. A seal or seal assembly according to any preceding claim, wherein the energizer provides a radial biasing force against the first lip or the second lip of between 0.3 and 20 N / mm.

8. A seal or seal assembly according to any preceding claim, wherein the seal provides a radial biasing force against the first member or the second member of between 0.3 and 150N / mm.

9. A seal or seal assembly according to any preceding claim, wherein the straight tapered edge of the second lip forms an angle α, where α is less than 90°.

10. A seal or seal assembly according to any preceding claim, wherein at least one of the first lip or the second lip is static within the seal assembly.

11. A seal or seal assembly according to any preceding claim, wherein at least one of the first lip or the second lip is dynamic within the seal assembly.

12. A seal or seal assembly according to any preceding claim, wherein the first lip comprises an arcuate inner portion.

13. A seal or seal assembly according to any preceding claim, wherein the second lip comprises an arcuate inner portion.

14. A seal or seal assembly according to any preceding claim, wherein the first lip is located radially inward of the second lip.

15. The seal or seal assembly of any preceding claim, wherein the jacket comprises a polymer.

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