88results about How to "Dispersion force" patented technology

In a cylinder apparatus such as a hydraulic shock absorber, a piston to which a piston rod is connected slidably is inserted into a cylinder which contains liquid oil. A rebound spring is wound around the piston rod with one end of the piston rod fixed to the piston rod using a spring holder. The rebound spring is slidably guided along the piston rod by means of another spring holder. A rebound stopper is fixed to the piston rod at a position between the spring holders. The rebound spring exerts a spring force opposite to the extension of the piston rod, thereby to moderate shock at the end of the stroke of the piston. Because the spring holder comes into contact with the rebound stopper, contact of adjacent linear portions of the rebound spring with each other due to excessive compression of the rebound spring can be prevented, and also occurrence of strange noise and damage of the rebound spring can be prevented.

The invention discloses a lifting buffering self-restoring anti-explosive door of a vertical shaft, relating to ventilating safety facilities of a mine, and solving the problem that the anti-explosive door of current mineral air shaft is easy to damage to influence the safety when exploding. The lifting buffering self-restoring anti-explosive door is characterized in that two guiding columns are uprightly fixed to two sides of a door frame, respectively; two guiding columns are respectively composed of upright rods, nuts and springs; springs are respectively sleeved outside two upright rods; the nuts are arranged on the top of the upright rod to contact with the spring; the lower ends of two upright rods are respectively sleeved with upright barrels extended from two ends of a buffering seat; the door frame is integrally connected with the buffering seat through the nuts; a door leaf is placed on the door frame, and arranged on the buffering seat; a buffering plate provided with a plurality of buffering blocks at two sides respectively is fixed to the upper part of the buffering seat. The lifting buffering self-restoring anti-explosive door disclosed by the invention is applied to the mineral air shaft to remove the influence to the safety of the anti-explosive door, and has the advantages of simple structure, safety and reliability.

A hair iron can regulate the surface of hair with the surfaces of correctors and disperse force acting on cross sectional points of each hair that are in contact with the correctors. The hair iron has clamp arms and the correctors that are arranged on the clamp arms, to face each other, hold hair between them, and heat the hair. At this time, correcting surfaces hold and correct the hair. The correcting surface of one of the correctors is roughened with irregularities to increase contact points or contact areas with the hair and the correcting surface of the other corrector is formed to be smoother than the correcting surface.

A coupling device of jigs includes a foundation, a tube, a plurality of balls, and a piston base. The foundation has a chamber, in which a part of the tube is inserted. The tube has a plurality of through holes for housing the balls. The piston base is received in the chamber, and fitted to the tube. An inner surface of the piston base has a circular groove and an abutment surface. The piston base can be moved along an axial direction of the tube between a first position and a second position. When at the first position, a part of each ball is inside the circular groove; when at the second position, an area where the abutment surface abuts against each ball is not merely a single point. Whereby, the force applied on the abutment surface is dispersed, and therefore the processing accuracy of workpieces is ensured.

Methods and devices that prevent stasis in the LAA by either increasing the flow through the LAA or by closing off or sealing the LAA. Increasing the flow is accomplished through shunts, flow diverters, agitators, or by increasing the size of the ostium. Closing off the LAA is accomplished using seals or by cinching the LAA.