摘要:
A hollow metal ball bat having a hollow end knob encompassing an enlarged section of a hollow handle portion. The opening of the end knob is smaller than the contained enlarged handle portion, and fits over the smaller cross-section of the handle portion adjacent the enlarged portion. A ring of resilient material is held between the end knob and the enlarged handle portion.
摘要:
A method of attaching a hollow end knob to the handle portion of a hollow ball bat, in which the hollow bat handle portion positioned within the cavity of the hollow end knob is outwardly deformed to a transverse cross-section substantially larger than the cavity opening. The outward deformation is preferably accomplished by applying pressure against the transverse exterior surface of the end knob which in turn bears against the circular end of the hollow bat handle. The interior transverse surface of the end knob may have a circular recess corresponding to the end of the bat handle.A hollow metal ball bat having a hollow end knob encompassing an enlarged section of a hollow handle portion. The opening of the end knob is smaller than the contained enlarged handle portion, and fits over the smaller cross-section of the handle portion adjacent the enlarged portion.
摘要:
A coated ice skate blade includes an ice skate blade having a plurality of sides and a bottom, and a compressive coating applied to the sides of the ice skate blade. Also provided is a method of producing a coated ice skate blade including receiving an ice skate blade having a plurality of sides and an unground bottom, applying a compressive coating to the sides and the bottom of the ice skate blade, and grinding the bottom of the ice skate blade to produce a radius of hollow. Another method includes receiving an ice skate blade having a plurality of sides and a ground bottom, and applying a compressive coating to the sides and the bottom of the ice skate blade.
摘要:
A thin wall tubular bat, particularly for softball, has a constant barrel diameter and an internal tubular insert spaced from the barrel with a shear stress transmitting elastomeric layer sandwiched between the barrel and insert so that the insert reinforces the barrel to reduce denting which would otherwise occur as the elastomer efficiently transfers stress to the insert and stores and releases energy during impact of the bat with a ball.
摘要:
An archery arrow nock (10) having a bowstring receiving groove (16) with a string contact point which is offset from the central axis (12) of the arrow to which the nock is to be attached permits the use of a lighter weight less stiff arrow by countering and diminishing the normal bending of the arrowshaft as it is propelled forward by acceleration of the bowstring at the moment of release. The string contact point may be offset either laterally from the plane containing the bowstring and arrow centerline or in this plane away from the arrow centerline.
摘要:
A flexible skate boot having lower and upper portions made of leather, synthetic leather or similar material is provided with a flexible ankle encircling cuff made of synthetic moldable plastic material capable flexing designed in amounts in the forward and aft and lateral directions to act as an energy storage and release device and without wrinkling so as to minimize discomfort and abrasion on the user's ankle and extend the useful life of the boot. The tongue portion of the boot has a similar molded synthetic flexible panel separating the upper and lower sections of the tongue, the tongue panel being aligned with the flexible ankle encircling cuff which separates the upper and lower parts of the boot from each other. The parts are designed to essentially lock the tongue in the desired frontal position to prevent tongue migration from the desired frontal position during skating. The foot confining portion of the boot can be hand formed of leather on a last for custom fit so that the boot can be used with minimal break in.
摘要:
A light weight high strength bicycle seat post comprised of a metal tube having a pre-stressed, tubular composite core therein, with the core having an exposed end extending from the tube, and method making same are disclosed in which the tube includes a composite core compressively engaged with the interior of the metal tube. The composite core is compressively restrained inside the metal tube by compressive stresses in the order of not less than about twenty thousand pounds per square inch. The composite core is formed of a plurality of layers of carbon fibers in a triaxial arrangement. The method of making the bicycle seat post consists of inserting an uncured composite core into a metal tube and expanding the core into engagement with the metal tube under heat and pressure to cure the composite and establish a light weight high strength bicycle seat post. Accordingly, the article is particularly useful as a bicycle seat post that possess strength, rigidity, and light weight.
摘要:
A two-piece hockey stick shaft and blade joint system employing wax to hold the elements together during play, which may also include provision of a "pre-load" force acting between a shaft socket and blade tennon to increase frictional resistance to separation of the blade and the shaft so as to require a sustained steady pull be applied to separate the elements, the wax being substantially solid at temperatures encountered during play and flowable at elevated temperatures, for example such as might be attained in the shaft to blade connection by application of warmth from the hands or application of water heated sufficiently.