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34results about How to "Structural strength" patented technology

Trilithic and/or twin shell dome type structures and method of making same

Trilithic Shell, Twin Shell, Multiple Shell, Curvilinear Shell as well as Free-formed Structures described herein each employ an inflatable membrane having a peripheral edge secured to an outer foundation base. An ultra-light membrane (air-form) having a network of internal cross connecting restraints is additionally secured to the inner foundation base to permit a novel and unique curvilinear surface. Pressurization then creates the backdrop upon which various urethane layers are applied which when laced with rigidifying tubes become the defining backdrop beneath which numerous cross connecting braces which when snapped into position effectively lock an inner framework to an outer framework thereby producing a self supporting truss like structure both compatible with either current dome construction and/or conventional construction practices. Shotcrete being then sprayed from the interior over said urethane coated backdrop forms highs at framework intersections and natural lows in between followed by the insertion of inflated cell tubes which span the created network of horizontal and vertical cavities are next over sprayed with urethane foam necessary to form the next natural backdrop over which two or more shotcrete/steel reinforced separate yet cross connected planes may be achieved. Such multiple yet independent rigid layers now having thousands of inner-connecting cross braces through which interior voids become natural chase-ways effectively displace 50% or more of what might otherwise be solid concrete as would be the case with all prior art thin shell structures and/or conventional stem wall construction practices. Such Free Formed curve-linear structures effectively reduce material and labor costs by as much as 50%, eliminate snap-through or oil-can buckling tendencies, enhance overall structural capacity, eliminate all height to diameter restraints, permit larger structures, facilitate floor suspension and attachment, and allow mechanical, electrical and HVAC distribution through interior chase-ways which cannot be achieved with prior art concrete thin shell single thickness structures and/or conventional stem wall, construction practices to date.
Owner:DEFEVER MICHAEL D +1

Cleanable clamp for brake disc processing

The invention provides a cleanable clamp for brake disc processing. The cleanable clamp for the brake disc processing is characterized in that a group of clamping jaws is mounted at the upper part of a base, wherein a chuck is mounted on the clamping jaws; symmetric clamping jaws are mounted at the side edge of the base, and a double-layer chuck is fixed between the clamping jaws; the upper layer of the chuck is provided with a hollow circular ring, and the lower layer of the chuck is provided with a circular plate which is provided with mesh pores; a funnel shaped groove is formed in the upper part of the base, and a waste channel is arranged from the bottom part of the groove to the outer wall of the base; a group of water feeding channels is arranged in the sidewall of the base; symmetric water outlets of the water feeding pipelines are arranged above the groove. The cleanable clamp for the brake disc processing has the beneficial effects that the structure is simple; the cost is low; chippings on a worktable can be effectively reduced during the processing through the groove in the base and an universal cooling pipe; the universal cooling pipe is capable of upwards spraying water to certainly cool a brake disc and the chuck; a processing station of the brake disc can be calibrated through the double-layer chuck, and the chippings on the brake disc can fall into the base, and moreover, the structure strength of the chuck can be improved.
Owner:禹州市伟朔机械制造厂

Orthopedic surgical traction device

The invention discloses an orthopedic surgical traction device. The orthopedic surgical traction device is characterized by comprising two mutually independent leg fixing components which are appliedto a human left leg and a right leg respectively. Two adjacent fixing hoops of each crus traction assembly and the corresponding thigh traction assembly are connected through two second traction screws on two sides of the corresponding thigh and crus traction assembles, two ends of each second traction screw penetrate a corresponding rotating connection ring, and second locking nuts sleeve the second traction screws on two sides of each rotating connection ring. A large end of a rod portion of each rotating connection ring is in rotation fit with a mounting blind hole in the outer wall of a corresponding fixing semi-ring, and a small end of the rod portion of each rotating connection ring penetrates a positioning hole of a limiting cover which is fixed to the outer wall of the corresponding fixing semi-ring. The orthopedic surgical traction device is directly fixed to two sides of a fracture part to realize traction, completely different from existing head and sole traction means and is short in traction distance, great in traction effect and less prone to causing extra fracture injuries.
Owner:THE FIRST AFFILIATED HOSPITAL OF HENAN UNIV OF SCI & TECH
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