An annular packing (30) has a cross-section in the form of a dumbbell including two enlargements (31, 32) connected by a neck (33). In a preferred embodiment the enlargements exhibit a polygonal cross-section. The packing advantageously replaces an O-ring seal in which the interior diameter of the ring is large relative to the diameter of the cross-section of the ring. The packing is arranged between two parts driven at different speeds, in precision mechanisms or in horology.

An improved packing body is formed by forming a first end wall of a perforated strip into an interior convolution surrounded by a peripheral convolution containing the second end wall of the strip. The convolutions may be in spiral form or concentric polygons such as cylinders joined by connector segments. Baffle elements can project from the surface of the strip at an angle to the longitudinal axis of the packing body. Tapered strips with the large end wall disposed to the interior can be bent ...

A packing for hermetically sealing a member. The packing in accordance with the present invention comprises braiding yarns each of which includes a plurality of longitudinally arranged reinforcing fiber yarns and expanded graphite integrally bonded to at least one side of the reinforcing fiber yarns with adhesives, so that the braiding yarns are provided with excellent sealing properties and strong tensile strength and toughness. A plurality of such braiding yarns may be put together to form a c...

An annular packing (30) has a cross-section in the form of a dumbbell including two enlargements (31, 32) connected by a neck (33). In a preferred embodiment the enlargements exhibit a polygonal cross-section. The packing advantageously replaces an O-ring seal in which the interior diameter of the ring is large relative to the diameter of the cross-section of the ring. The packing is arranged between two parts driven at different speeds, in precision mechanisms or in horology.

An improved packing body is formed by forming a first end wall of a perforated strip into an interior convolution surrounded by a peripheral convolution containing the second end wall of the strip. The convolution may be in spiral form or concentric polygons such as cylinders joined by connector segments. Baffle elements can project from the surface of the strip at an angle to the longitudinal axis of the packing body. Tapered strip with the large end wall disposed to the interior can be bent in...

A packing assembly comprises a plurality of adjacent solid, compressible, non-resilient, low friction packing rings having cylindrical sealing surfaces forming a continuous sealing surface along the shaft and each solid ring having a pair of converging generally radially extending walls thereby defining a space between the adjacent walls of each pair of adjacent rings and resilient rings in the space between adjacent solid rings.

An annular generally V shaped sealing ring for use in multi-ring packing assemblies for hydraulic sealing applications, the ring having a flat base and a flat seat on the opposite side of the ring for accommodating the base of a similar, adjacent sealing ring. The ring also having two sealing lips, the inner and outer sides of each lip extending from the radially corresponding inner and outer edges of the base and seat, and the lips being formed such that, when the base of one ring is abutting t...

A packing member, in either strip or annular form, the member comprising two lip sections adjoined to form a broad planar head surface. Each of the lip sections has a base with an outer lateral surface, and a groove extends along the entire length, or circumference, of the packing member between the bases. At least one of the lip sections includes a laterally outwardly depending sealing projection having a generally laterally outwardly facing side surface and a lower surface. In a relaxed state,...

A packing member, in either strip or annular form, the member having a head with a broad planar head surface, and first and second lip sections. Each of the lip sections has a laterally outwardly facing side surface and a base. A groove extends along the entire length, or circumference, of the packing member between the bases. At least one of the lip sections has a cavity in its base extending along the length or circumference of the packing member and forming a pressure trap.

A seal ring assembly for sealing in two directions, comprising an elastomeric seal ring with a pair of lips, solid elastomeric loading ring between the lips, and a pressure inverting pedestal ring active on the loading ring such that when fluid pressure is behind the pedestal ring the fluid pressure bypasses the pedestal ring and acts on the loading ring to deform the same to press the lips into sealing engagement with the members, and when fluid pressure is behind the seal ring the latter pushe...