A head for a ball striking device includes a bracing member connected to an upper sole surface located on the sole of the body opposite the bottom sole surface. The bracing member includes a first end connected to a first point on the upper sole surface, a second end connected to a second point on the upper sole surface spaced from the first point, and a bridge portion extending between the first and second ends. The bridge portion extends upward from the upper sole surface and is spaced from the upper sole surface. The bridge portion may be formed by one or more trusses, and may define a generally triangular shape in one embodiment. The first and second ends may be connected to the upper sole surface using a variety of techniques, e.g., welding or other integral joining technique, integral forming, adhesive or other bonding material, or other technique.

Disclosed herein are methods, compositions and tools for repairing articular surfaces repair materials and for repairing an articular surface. The articular surface repairs are customizable or highly selectable by patient and geared toward providing optimal fit and function. The surgical tools are designed to be customizable or highly selectable by patient to increase the speed, accuracy and simplicity of performing total or partial arthroplasty.

The application is related to adjustable supports for holding objects in one or more desired fixed orientations, including but not necessarily limited to objects that lack uniformity as to size and/or shape and/or weight.

A mineral filler in a flame-retardant organic polymer composition comprising a calcium compound for a fire-resistant effect characterized in that said calcium compound comprises at least calcium hydroxide, use of same and the combustion residue obtained therefrom, and polymer sheaths for electrical cables containing the mineral filler in the flame-retardant polymer composition.

After a free-form surface is machined on an elongated material 1 with a projection 3 and a blade root 4 held, the holding of the projection 3 is released to release strain generated during machining. Upon release of the holding, the entire elongated material 1 deforms, and the projection 3 moves from a holding position A to a strain-released position B. A re-holding position C obtained by correcting the position B by the deformation amount of the elongated material 1 due to the weight of the elongated material 1 is determined, and the projection 3 is held again at the re-holding position C for further machining the free-form surface on the elongated material 1.

A golf club head includes a heel portion, a toe portion, a hosel, and a striking face. The striking face includes a plurality of scorelines each having an average depth no less than about 0.10 mm, a plurality of first micro-grooves each having an average depth no greater than about 0.010 mm, and a plurality of second micro-grooves overlaid on the first micro-grooves, each of the second micro-grooves having an average depth greater than the average depth of the first micro-grooves. Some embodiments can also have a plurality of textured surface treatment regions superimposed on the overlaid first and second micro-grooves so as to at least partially intersect the micro-grooves.

A brake disc for a wheeled vehicle; said brake disc including opposing annular braking surfaces; each of said surfaces provided with an identical pattern of disparate arcuate groove segments; said groove segments arranged in groups oriented in both clockwise and anti-clockwise directions; each of said groups including, one series of at least two arcuate groove segments lying along a common arc extending from proximate a hub of said braking surface to proximate the periphery of said braking surface, one inward arcuate groove segment extending from proximate said hub to a point intermediate said hub and said periphery, and one outward arcuate groove segment extending from a point intermediate said hub and said periphery to proximate said periphery.

A rotary grinding mill for that improves the rotary grinding mill process. A milling assembly that comprise an offset ripper blades to limit the noise applied to the unit, cutting edges on the milling assembly blades, and an trailing blade edge that is angled creating a milling fan blade. The milling fan blade creates an air flow through the mill assembly. A collection container that utilized a plurality of cyclonic air flow patterns and filters to remove particles from the air. A rotary grinding mill comprising a mill housing, a hopper, and collection container, such that the grinding mill may be stored in a single unit.

Embodiments of golf clubs with grooves and methods of manufacture thereof are described herein. In one embodiment of a golf club described herein, the golf club has a head with a body. The body has a strike face with channels and at least one insert located within at least one of the channels. At least one of the channels comprises a single groove, and the insert forms at least a portion of the single groove. At least one of the channels comprises an opening on the strike face that is narrower than a bottom of the at least one of the channels. Other embodiments and related methods are also disclosed herein.

A tool holder comprising a base element, a deformable receiver for clamping a tool and at least one locking element configured for preventing an axial extraction of the tool from the tool holder through engaging a corresponding opposite element at the tool, wherein the at least one locking element is integrally configured in one piece with the receiver.