38 results about "Trapezoid body" patented technology

The invention relates to an implantation angle collimator for acetabulum prostheses, which comprise a right angle trapezoid body with an acute angle of alpha, a first bevel protractor with an included angle of beta, a second bevel protractor with an included angle of gamma, a gradienter and a guide rod. The alpha is larger than 75 degrees and smaller than 80 degrees, the beta is larger than 40 degrees and smaller than 45 degrees, and the beta plus the gamma is equal to 90 degrees. An inclined waist face of the right angle trapezoid body is arranged at the top, a right angle face opposite to the inclined waist face is positioned at the bottom, another two right angle faces are positioned on the left side and the right side, the gradienter is positioned on the inclined waist face, the bottom of the right angle trapezoid body is arranged on the guide rod, slide grooves are respectively arranged on the front lateral side and the rear lateral side of the right angle trapezoid body, and one sides of the first bevel protractor and the second bevel protractor are positioned in the slide grooves on the front lateral side and the rear lateral side and can move along the slide grooves. The implantation angle collimator resolves the problems that an operator is low in implantation location accuracy and large in error relying on experience and according to topography signs. The implantation angle collimator is simple in operation, economic and practical, widely applied to the medical field and capable of meeting clinical requirements well.

The invention relates to the field of valves, in particular to a three-way valve. The three-way valve comprises a valve body, wherein a cavity, and a first channel, a second channel and a third channel which are respectively communicated with the cavity are formed in the valve body; a valve core is arranged in the cavity; the valve core consists of two trapezoid bodies which are arranged in a longitudinal symmetry manner and a cylinder which is sandwiched between the two trapezoid bodies; a sealing ring is arranged on the periphery of the cylinder; the first channel is selectively communicated with the second channel and the third channel by the matching of the valve core and the cavity; a push rod is arranged on the upper surface of the valve core, penetrates through the upper end of the valve body, and extends out of the valve body; clamping rods in the horizontal direction are arranged on the two sides of the push rod; a clamping seat corresponding to the clamping rods is arranged in the valve body. The defect that the service life of the valve core is short because the valve core of the original three-way valve is required to be rotated is overcome; the service life of the three-way valve is prolonged; the production cost is reduced.

The invention relates to the technical field of material conveying equipment, in particular to a keycap conveying device. The keycap conveying device comprises a vibration material conveyer; a rail for conveying keycaps is arranged in the cavity of the vibration material conveyer; the rail is formed by four long strip-shaped rails and has a function of accommodating trapezoid bodies; the rail extends upwards from a bottom surface in the cavity to form a spiral twisting rail; the vibration material conveyer is used for conveying the keycaps in the cavity to the rail; a screening device is fixedly arranged on the rail; and the screening device comprises a top screening block, side screening blocks and a bottom screening block and is used for screening keycaps which are not placed according to requirement and move on the rail. By adopting the keycap conveying device, the keycaps can be conveyed according to placement requirement.

The invention belongs to a liquid-type high-power microwave rectangular waveguide attenuator which is matched with a power microwave measuring system in a microwave device. The liquid-type high-power microwave rectangular waveguide attenuator comprises a wave conductor, a trapezoid body attenuation liquid container, attenuation liquid, a forced circulating cooling system, wherein the trapezoid body attenuation liquid container is arranged in the waveguide body and is provided with an attenuation liquid inlet and an attenuation liquid outlet, the cooling tank containing attenuation liquid is arranged outside the wave conductor and is communicated with, the forced circulating cooling system comprising the attenuation liquid container, a circulating pump and an attenuation liquid circulatingpipe. The invention adopts trapezoid body liquid crystal glass as the attenuation liquid container, takes saline solution as attenuation liquid and adds the forced circulating cooling system, and thus the liquid-type high-power microwave rectangular waveguide attenuator has wide working band, good stability, small standing-wave ratio, high power capacity, high cooling efficiency and high bearablemaximum average power. If being matched with matched with a power microwave measuring system,, the liquid-type high-power microwave rectangular waveguide attenuator can effectively attenuate large power signal to the range capable of being measured by the measuring system, which provides a favourable condition for accurately analyzing and measuring the signal, is favourable for expanding the application range thereof and the like.