3688 results about "Angle alpha" patented technology

A structurally supported tire includes an outer annular band, and a plurality of web spokes extending transversely across and radially inward from the annular band and anchored in a wheel or hub. The annular band may further comprise a shear layer, at least a first membrane adhered to the radially inward extent of the shear layer, and at least a second membrane adhered to the radially outward extent of the shear layer. A preferred web spoke has a cutaway section transverse to the annular band. The cutaway section has a profile formed by straight line segments joined by a blending radius. The profile of the cutaway comprises a height and a maximum depth greater than five percent of the height and less than thirty percent of the maximum width. The profile has an angle alpha formed by a line tangent to the profile relative to the horizontal at least equal to ten degrees at the radially outermost and radially innermost extent of said profile. The minimum radius of curvature of the profile is at least equal to twenty percent of the height of the cutaway section.

The invention discloses a combined drill breaking rocks by a cutting method. The combined drill comprises a drill body (1) and a rotating wheel (2), wherein a wheel palm (3) is arranged on the drill body (1); the rotating wheel (2) is arranged on the shaft neck (6) of the wheel palm (3) and is in rotary connection with the wheel palm (3); an external row of cutting gear rings (4) are arranged on the rotating wheel (2); the deviation angle alpha of the rotating wheel (2) is in a range that the absolute value of alpha is more than or equal to 20 degrees and less than or equal to 90 degrees; and a fixed cutting structure (8) with fixed cutting teeth (8a) is arranged on the drill body (1). Cutting teeth on the rotating wheel break the rocks in an alternatively scraping mode and cooperates with the cutting teeth on the fixed cutting structure to form a net-like breaking region on the pit bottom rocks, so the combined drill has the advantages of high rock-breaking efficiency, uniform wear, good cooling effect, long service life of the teeth, long working life of the bearing and long service life of the drill.

The invention provides a guide for angularly positioning bones in a joint in order to perform arthrodesis, the guide comprising:a base for positioning on the joint, and having an adjustment shaft whose position is designed to be adjusted so as to be substantially vertically above a fixed first geometrical reference point R of the joint; andan adjustment assembly mounted to slide axially and in rotation on the adjustment shaft to adjust respectively a height for the assembly relative to the first geometrical reference point R and a first angle alpha for the assembly about said axis, said adjustment assembly being formed by an angular adjustable member which can be positioned on a graduated piece to adjust a second angle beta centered on the first geometrical reference point R, but situated in a plane different from the first angle alpha.The guide is suitable for metatarso-phalangeal positioning.

The invention discloses an internally-arranged blind window with double layers of hollow glass, and belongs to the technical field of sunshade hollow glass products. The internally-arranged blind window comprises a window body, a shutter blind, a blind piece turnover adjusting control mechanism, a shutter blind lifting adjusting control mechanism, a shutter blind lifting and blind piece turnover transition mechanism, a blind piece turnover traction rope upper connecting mechanism, a blind piece turnover traction rope transition mechanism, a bottom strip traction rope transition mechanism and a blind piece turnover traction rope. The shutter blind comprises a bottom strip, a set of blind pieces, a bottom strip traction rope and a blind piece turnover rope. The internally-arranged blind window is characterized in that the blind pieces are of structures with cross section shapes tendency to S shapes, and the blind pieces are composed of large semicircular blind piece bodies and small semicircular blind piece bodies; arch directions of the small semicircular blind piece bodies is opposite to the arch directions of the large semicircular blind piece bodies, and the positions, located on the blind pieces, of traction rope recess holes are located on edge portions of sides, away from the small semicircular blind piece bodies, of the large semicircular blind piece bodies; the width of a closed gap between adjacent blind pieces and the degree of a maximum visual included angle alpha are obviously reduced, and a user is prevented from peeping at the interior from the exterior; and the privacy is protected, and safety is ensured.