55results about How to "Concentrated force" patented technology

An adaptive cushion for reducing pressure on body parts of a person positioned on a chair or bed includes an overlay cushion having a plurality of individual air bladder cells, each having thereon a force sensor. The cushion includes a controller for inflating and deflating individual air bladder cells to air pressures that tend to reduce the interface pressures sensed by the force sensors. A pressure reduction method includes varying the inflation pressure in a first air bladder cell while measuring the sum of the interface pressures exerted on all or a plurality of the air bladder cells, re-pressurizing the first cell to that air pressure for which a minimum total interface pressure was obtained, repeating this process for the remaining air bladder cells.

The invention discloses a full-mechanized hydraulic support fiber bragg grating pressure sensor, wherein the sensor adopts a cylindrical shell, and a pressure oil cavity, a sealing member and a sensing piston are arranged in the shell, the oil pressure change of the pressure oil cavity is transferred to the sensing piston, a belleville spring deforms under the action of oil pressure, sensing fiber bragg grating is attached onto a transmission device, the transmission device deforms when force is applied thereon so as to cause the wave length of the fiber bragg grating to change, and the fiberbragg grating adopts encapsulation with the temperature compensation function. The effects and the benefits of the invention are that the fiber bragg grating pressure sensor has high sensitivity, large measurement range, simple structure and long-term reliability, can real-timely monitor the measurement, and is beneficial to promote the application of the fiber bragg grating pressure sensor in mine mentoring.

The invention discloses a connecting structure and method for an externally-hung wallboard and a precast beam, and relates to the technical field of assembling construction of the externally-hung wallboard. The connecting structure comprises the externally-hung wallboard, the precast beam, L-shaped anchor plates A, L-shaped anchor plates B and a plurality of connecting pieces, wherein a mounting groove is formed in the connecting position of the externally-hung wallboard, the precast beam is horizontally arranged, and a step shaped like a Chinese character 'tu (convex)' is arranged at one end of the precast beam; the two sets of L-shaped anchor plates A are arranged at the upper inner right-angle position and the lower inner right-angle position of the mounting groove correspondingly, and the two sets of L-shaped anchor plates B are arranged at the upper step position and the lower step position of one end of the precast beam correspondingly; and the plurality of connecting pieces are connected between the L-shaped anchor plates A at the upper position and the lower position and the corresponding L-shaped anchor plates B. According to the connecting method, construction is conducted in sequence according to the structure. The connecting structure and method for the externally-hung wallboard and the precast beam have the advantages that stress of the step positions in the connecting structure for the externally-hung wallboard and the precast beam is greatly reduced, stability is improved, on-site mounting is rapid and convenient, and environmental friendliness and economy are achieved.

The invention discloses a low-temperature emergency release coupler. The low-temperature emergency release coupler comprises coupler bodies. A hoop is arranged on the coupler bodies. A release mechanism is arranged at one end of the hoop. The low-temperature emergency release coupler has the beneficial effects that the novel low-temperature emergency release coupler provided with the hoop release mechanism is provided, the first valve body and the second valve body are well fixed to each other, unnecessary release of the emergency release coupler can be avoided through the hoop, the release difficulty is avoided, safety release and security are achieved, the stress is concentrated, release is sensitive, rapid and effective, the disengaged hoop cannot generate potential safety hazards after release, a seal action is rapidly conducted, and leakage of a low-temperature medium is effectively avoided.

A damper opening and closing angle varying mechanism of a hinge comprises a blocking element, a connection element and a lever element which are in hinge fit with one another. A damper is arranged between the blocking element and the connection element. One end of the damper is rotationally arranged on the blocking element, and the other end of the damper abuts against the connection element. The connection element, the lever element and the damper are linked with one other relative to the blocking element when the hinge is opened or closed. When the hinge is closed by at least one certain angle, the lever element acts on the damper and drives the damper to slide on the connection element in a limited mode, the damper is compressed and generates damping force, and thus, damped closing of the hinge is achieved. Through the structure improvement, the damper opening and closing angle varying mechanism of the hinge has the characteristics that the structure is simple and reasonable, safety and reliability are achieved, production and implementation are easy, adjustment is fast, operation is convenient, the service life is long, practicability is high, and the opening and closing process is labor-saving, smooth, small in collision and low in noise.