3544results about How to "Increase coefficient of friction" patented technology

The implant has at least one contact surface portion, made of pyrolytic carbon, designed to be in mobile contact with at least one bony surface when the implant is implanted in a patient. Furthermore, the implant is free from any attaching means, so that it remains free with respect to the at least one bony surface when implanted in the patient.

The magnetic signal reproduction system comprises a magnetic recording medium comprising a magnetic layer comprising a ferromagnetic powder and a binder on a nonmagnetic support and a reproduction head, wherein a number of protrusions equal to or greater than 10 nm in height on the magnetic layer surface, as measured by an atomic force microscope, ranges from 50 to 2500/10,000 μm², a quantity of lubricant on the magnetic layer surface, denoted as a surface lubricant index, ranges from 0.5 to 5.0, a surface abrasive occupancy of the magnetic layer ranges from 2 to 20 percent, the reproduction head is a magnetoresistive magnetic head comprising a spin-valve layer, the spin-valve layer comprises a magnetization free layer, a magnetization pinned layer and an antiferromagnetic layer, and the antiferromagnetic layer is comprised of alloy comprising iridium and manganese, and the reproduction head comes in sliding contact with the magnetic recording medium during signal reproduction.

An absorbent article having a reusable outer cover and, optionally, an absorbent insert. The reusable outer cover has zones of varying properties. The properties of the different zones are varied to provide different performance features in different parts of the outer cover. The outer cover with zones of varying properties may provide competing or contradictory functionalities for improved comfort, fit, leakage protection, and aesthetic appeal.

Skid-resistant surfaces as described having either a pressure-sensitive adhesive layer or a highly filled, textured binder to reduce skidding. The surfaces are applied to trafficable surfaces such as roof and floors. Products such as roof underlyments bearing the surfaces are described in particular.

The present invention discloses a grip fractioning pattern for any object, but specifically designed for handgun and rifle grips. The pattern consists of a series of spaces frusto-conical projections regularly spaced about the surface of the weapon's grip. Alternatively, the series may be interrupted by an interspaced series of pyramids, with their points not extending above the height of the frusto-conical projections. The grip pattern may be utilized in any circumstance where a user desires greater and more comfortable friction when gripping an object.

The invention described is a system for seismic isolation or vibration of structures which is simple, relatively inexpensive and readily used for smaller structures. It involves use of bearings comprising a ball (10) and ball seats (12, 18) interposed between the structure and its foundation. Either the ball itself (24) or the seat surface (15) on which it rolls is compressible, the resistance to that compression providing a frictional braking force resisting rolling of the ball. This serves to dampen relative movement between the structure and its foundation. There are described several alternative constructions of the friction ball which is the preferred central element in the bearing device. There may be a plurality of balls (44, 47) in each combination of balls and seats.

The invention provides a metal surface treatment agent composed of aqueous solution or aqueous emulsion containing ionic liquid. The metal surface treatment agent comprises the ionic liquid, silicate or silane coupling agent, water-soluble chitin or chitosan, corrosion inhibitor, stabilizer, pH modifier, wetter, coalescing agent, antioxidant, ethanol and water, the ionic liquid is room-temperature ionic liquid consisting of nitrogenous heterocyclic compound cations and inorganic or organic anions, one or more of nanoscale titanium dioxide, zirconium oxide or zirconium fluoride is uniformly mixed into the silicate or silane coupling agent by the weight equivalently accounting for 3%-25% of that of the silicate or silane coupling agent. A chemical conversion coating is formed on a metal surface by the metal surface treatment agent, can inhibit corrosion of the metal surface, and has a fine coating performance. The metal surface treatment agent is used for treating cold-rolled plates, galvanized plates and aluminum plates, and the metal surface treated by the metal surface treatment agent has the coating adhesion force equivalent to that of a metal surface treated by a phosphorus-containing metal surface treatment agent.

A friction material for brakes is formed by molding and hardening a raw material composition mainly containing a fibrous substrate, a friction adjuster, an organic filler, an inorganic filler and a binder in the form of a thermosetting resin. The friction material further contains aggregates of fine alumina particles, the aggregates having an average particle diameter of 30 to 60 μm, and the alumina particles having a particle diameter of 0.2 to 0.9 μm.

The invention belongs to the technical field of materials, and specifically relates to a nano-carbon-reinforced wear-resistant composite material. The nano-carbon-reinforced wear-resistant composite material comprises the following components in percentage by mass: 55-99% of metal powder, 0.1-35% of ceramic powder, and 0.01-15% of nano-carbon, wherein the metal powder is used as a composite material matrix; the ceramic powder is used as a wear-resistant filling material; and the nano-carbon comprises single-wall carbon nano-tubes, multi-wall carbon nano-tubes and other materials, and is mainly used for improving the heat-conducting performance, strength, toughness, wear resistance and other performances of the composite material. The wear-resistant composite material disclosed by the invention can keep a stable friction coefficient and a low wear rate under the conditions of a heavy load, a high speed, and long-time braking.

The invention discloses energy-efficient long-life gasoline engine oil prepared from the following components: synthetic base oil, a composite antioxygen, a metal cleaning agent, an ashless dispersant, a nano-level friction improver, a viscosity improver and a pour point reducer. The gasoline engine oil provided by the invention has the following advantages: requirements of API SM, ILSAC GF-4 and SAEJ300 are met and the service life is long; the complete synthetic base oil features low pour point, high viscosity index, good economy of fuel, degradability and reduced harm to the ecological environment; the phenol type antioxygen is combined with ZDDP, the anti-oxygen and antifriction properties are good and the catalyst poisoning in a tail gas processing unit is prevented; the acid neutralization capacity is good, the cleaning dispersibility is good and the oil sludge and carbon deposit are prevented from being generated; and the nano-level friction improver is added, the frictional factor is low, and the oil film features high carrying capacity and can automatically repair abraded surface and lengthen the service life of the engine.

Pedestrian trafficable skid-resistant flexible articles (24) are described. These articles (24) include a flexible substrate (17) having a non-skid coating that may be either a pressure-sensitive adhesive (13) or a highly- filled, textured binder. These articles may be applied to trafficable surfaces such as roof and floors. Articles in the form of roof underlayments having a skid-resistant surface are described in particular.

A composite wear-resisting shoe sole is prepared from, by weight, 60-100 parts of natural rubber, 10-50 parts of styrene butadiene rubber, 5-20 parts of polar rubber, 10-60 parts of modified white carbon black, 1-10 parts of zinc oxide, 1-4 parts of accelerant, 0.1-0.5 part of antioxidant, 2.5-4.5 parts of active agent, 5-20 parts of filler and 1-10 parts of sulfur .The filler is tetrapod-like zinc oxide whiskers .According to the composite wear-resisting shoe sole, the natural rubber and a small amount of polar rubber are jointly used as main rubber materials, the white carbon black subjected to toluene diisocyanate graft modification is added to serve as a reinforcing material, the tetrapod-like zinc oxide whiskers of a highly regular structure are used as a filling frame, the accelerant, the composite antioxidant and the active agent are added in sequence, and the composite wear-resisting shoe sole with high slippery resistance and tear strength and a remarkably improved frictional coefficient is prepared.

A wafer container utilizes a rigid polymer tubular tower with slots and a “getter” therein for absorbing and filtering moisture and vapors within the wafer container. The tower preferably utilizes a purge grommet at the base of the container and may have a check valve therein to control the flow direction of gas (including air) into and out of the container and with respect to the tower. The tower is sealingly connected with the grommet. The tower may have a getter media piece rolled in an elongate circular fashion forming or shaped as a tube and disposed within the tower and may have axially extending. The media can provide active and/or passive filtration as well as having capabilities to be recharged. Front opening wafer containers for 300 mm sized wafers generally have a pair of recesses on each of the left and right side in the inside rear of the container portions. These recesses are preferably utilized for elongate towers, such towers extending substantially from a bottom wafer position to a top wafer position. In alternative embodiment, a tubular shape of getter material is exposed within the front opening container without containment of the getter other than at the ends. The tubular getter form is preferably supported at discrete locations to maximize exposure to the internal container environment. A blocker member can selectively close the apertures. An elastomeric cap can facilitate securement of the tubular component in the container portion.

The invention discloses raw paper of a high-performance environment-friendly paper based friction material and a manufacturing method of a friction plate. The high-performance environment-friendly paper based friction material is characterized by comprising the following components in percentage by weight: a substrate comprises 7-15% of carbon fiber, 5-10% of chopped aramid fiber, 5-10% of aramidpulp and 9-30% of bamboo fiber pulp; a friction agent comprises 10-20% of kieselguhr and 8-12% of cashew nut shell powder; a frictional property regulator adopts 2-4% of rubber particles, 5-10% of calcium carbonate and 10-15% of flake graphite; and a forming adhesive comprises 1-2% of fluororubber, 3-15% of silicone resin and 3-15% of phenolic resin. The invention fully forms the materials of thefriction material into a whole by changing the traditional impregnation process, effectively improves the physical and mechanical properties of the friction plate, improves the friction factors, regulates the dynamic and static friction ratio factors, and reduces the abrasion ratio of the friction plate.