1554results about How to "Improve energy absorption" patented technology

A method of inhibiting formation of a stress riser in a bone is provided. The method is comprised of providing a bone having a first device and replacing the first device with a second device. Both the first device and the second device are substantially cylindrical, with the diameter of the second device being larger than that of the first device. Formation of a stress riser is inhibited in the presence of the second device.

A protective helmet is described comprising: an outer layer (1); an inner layer (5) for contact with a head of a wearer; and an intermediate layer (3, 4) comprising an anisotropic cellular material comprising cells having cell walls, the anisotropic cellular material having a relatively low resistance against deformation resulting from tangential forces on the helmet. The anisotropic material can be a foam or honeycomb material. The foam is preferably a closed cell foam. The helmet allows tangential impacts to the helmet which cause less rotational acceleration or deceleration of the head of the wearer compared to helmets using isotropic foams while still absorbing a significant amount of rotational energy.

Tissue products are disclosed having desirable strength, stretch and softness properties. In particular, the tissue products exhibit relatively high strength while still having a relatively low stiffness and a significant amount of stretch. The tissue webs generally comprise uncreped through-air dried webs. In accordance with the present disclosure, the webs are formed in a through-air drying process in which the transfer fabric and the through-air drying fabric are both textured fabrics having a substantially uniform high strain distribution in the cross-machine direction. Various improvements in properties in the cross-machine direction are exhibited by deforming or molding a tissue web against one or more of the fabrics during the tissue making process.

The invention discloses a buffering and energy absorbing structure. The buffering and energy absorbing structure comprises a housing. The buffering and energy absorbing structure is a multi-layer metal grid structure or porous bubble structure filled in the housing; the metal grid structures or porous bubble structures of adjacent layers are lengthways alternatively overlapped in positive and negative poisson ratio; the metal grid structure in the positive poisson ratio is composed of a three-dimensional honeycomb grid structured formed by array type regular hexagonal pore grids; the metal grid structure in the negative poisson ratio is composed of a three-dimensional stretching and expanding grid structure formed by array type concave angle pore grids; the meshes of the porous bubble structure in the positive poisson ratio are of an array type rhombus structure; the meshes of the porous bubble structure in the negative rhombus structure are of an array type four-star shaped structure. Compared with the traditional buffering and energy absorbing structure, the buffering and energy absorbing structure can effectively reduce the peak value of the impact force, so that the whole energy absorbing process is stable, and as a result, the energy absorbing efficiency of the structure can be increased.

An airbag device with an improved airbag configuration to protect a vehicle occupant more efficiently. The airbag device is stored in the upper portion of an instrument panel of a vehicle under normal situations. The airbag device has an airbag that is deployable into a space in front of a vehicle occupant in the event of a vehicle emergency, such as a collision. The airbag viewed from the top when fully deployed and inflated has a right side portion, a left side portion, and a recess between the right and left side portions. When pressure is applied to the right and left side portions, the recess maintains a recessed shape.

An impact absorbing device for a vehicle uses a shape memory material that can be heated to repair deformation from a relatively low speed, low energy impact and its stroking force and energy absorption can be tuned by heating. The shape memory material is suitably used in a crash box having an inserted impact absorbing ram, the box being placed, for example, between a bumper and strong body member. The shape memory material is attached to the box and ram for absorbing energy as the ram is driven into the box. Electric resistance heating may be used to repair or tune the shape memory material.

Wave energy, converters are arranged as a plurality of coupled float members arranged in a two dimensional array. Link couplings between any float member and its neighbors drive a mechanical system to convert the disorganized motion due to heaving and bobbing of the float member on the ocean's surface into linear reciprocating motion in orthogonal directions. Such linear reciprocating motion is converted to electricity in an induction system having a mover and a stator—either being an inductor, the other being a magnet. The array is preferably provided to cover large surface areas whereby energy from incident ocean waves is appreciably absorbed at the float member an converted to mechanical motion. The array may be held to the ocean floor by a mooring or anchor system immediately offshore or up to a few tens of kilometers from the shoreline. Electricity provided at the array may be conveyed to shore via a submarine power transmission cable where it may be distributed and consumed on the public grid.

A sports guard for placing in a mouth of a user is disclosed. The guard includes generally a base member having a generally U-shaped form corresponding to the outline of a jaw of a user defining an upper channel within which an upper row of teeth of a user can be received. The guard also discloses a teeth engaging element associated with the channel which is made of a material able to be user conformed or user moulded to the mouth of the user. The guard also includes shock absorption means associated with the base member for absorbing impact shock. The shock absorption means comprises open channels in the base member that function much like air springs. Further the base member advantageously comprises polyethylene mixed with up to 10% of EVA. The addition of EVA gives the guard more flexibility. The teeth engaging element is made of EVA.

A removable ball of the foot insert for placement into footwear at a position in correspondence with a forefoot portion of the footwear includes a substantially planar member made from a viscoelastic gel, the planar member including a lower surface and an upper surface, and a plurality of spring walls formed from a viscoelastic gel and extending from the lower surface of the planar member at a predetermined area corresponding to a ball of the foot when the insert is inserted into the footwear, for separating bones of second and third metatarsals of the foot, the spring walls having heights that generally decrease outwardly from a center of the predetermined area, and the viscoelastic gel of the planar member having a hardness greater than a hardness of the viscoelastic gel of the spring walls.

This invention provides multi-layered composites, laminates and composite joints in which at least one resin-impregnated, fiber-containing layer is joined or laminated to a core layer having a lower flexural modulus or higher elongation at break, higher toughness, or a combination of all or some of these properties. The multi-layer composite produced by laminating or joining these materials together has improved shearout, impact and cutting resistance, since stresses caused by outside forces can be more widely distributed throughout the composite.

A magnetic recording media is disclosed. The media comprises a substrate, a recording layer disposed over the substrate, and a metallic layer disposed between the recording layer and the substrate. The recording layer is configured to receive an electromagnetic radiation, absorb a first portion of the electromagnetic radiation, and transmit a second portion of the electromagnetic radiation. The metallic layer comprises a non-magnetic metal and configured to reflect at least some of the second portion of the electromagnetic radiation towards the recording layer.

An active material hood impact mitigation mechanism is activated in response to a signal generated from an impact sensor or pre-impact sensor or manually. The mitigation mechanism is capable of changing either reversibly or irreversibly the stiffness, shape, location, orientation, or displacement force of the hood either globally or locally, before an impact against the hood. The active material mitigation mechanism is held in a device designed to be installed in operative communication with the hood surface. The active material is characterized by a first shape or stiffness and is operative to change to a second shape or stiffness in response to the activation signal. Such active materials include shape memory alloys, electroactive polymers, shape memory polymers, magnetic shape memory alloys, magnetorheological fluids, magnetorheological elastomers, electrorheological fluids, and piezoelectric materials.

A lateral displacement shock absorbing material includes a material consisting of elongated tubular impact absorbing members, each having an axis of elongation. The axes of elongation are parallel to one another by virtue of lateral webbing interconnecting them together. Each of the tubular members has an outer surface made up of two frustoconical surfaces with their larger diameter ends abutting one another and their smaller diameter ends facing away from one another. Each tubular member includes a passageway defined by two frustoconical shapes with the smaller diameter ends abutting one another, and the larger diameter ends facing away from one another and defining the openings of each passageway. Upon impact, the side walls of the tubular members bulge or displace laterally to absorb impacts.

A formed member is provided which can be manufactured at a low cost, which has excellent dimensional accuracy, which has excellent axial crushing properties and three-point bending properties, which has excellent bending stiffness and torsional stiffness, and which is suitable for use in a component of an automobile. The formed member (20) has a reinforcing member (35) which is joined by a weld (40) provided on a ridge portion (28). It is manufactured by joining a flat sheet blank and a flat sheet reinforcing member (35) by a weld (40) and performing bending so that the weld (40) becomes a ridge portion (28).