1493results about How to "Stable force" patented technology

A nasal assembly for delivering breathable gas to a patient includes a frame having an integrally formed first connector portion. A nozzle assembly includes a gusset or base portion and a pair of nozzles. At least one inlet conduit is structured to deliver breathable gas into the frame and nozzle assembly for breathing by the patient. A pair of second connector portions are removably and rotatably connected to respective first connector portions of the frame and are in communication with respective inlet conduits, e.g., directly or via angle connectors. A headgear assembly is removably connected to the pair of second connector portions and / or the angle connectors so as to maintain the frame and the nozzle assembly in a desired adjusted position on the patient's face.

A nasal assembly for delivering breathable gas to a patient includes a frame having an integrally formed first connector portion. A nozzle assembly includes a gusset or base portion and a pair of nozzles. At least one inlet conduit is structured to deliver breathable gas into the frame and nozzle assembly for breathing by the patient. A pair of second connector portions are removably and rotatably connected to respective first connector portions of the frame and are in communication with respective inlet conduits, e.g., directly or via angle connectors. A headgear assembly is removably connected to the pair of second connector portions and / or the angle connectors so as to maintain the frame and the nozzle assembly in a desired adjusted position on the patient's face.

The invention provides a three-dimensional tuned mass damper and relates to a vibration control device for a building structure. The three-dimensional tuned mass damper comprises a horizontal crosswise mass block, a horizontal longitudinal mass block, an upright mass block, a horizontal crosswise viscous damper, a horizontal longitudinal viscous damper, and the like. An outer frame of the device is formed into a square by structural steel; an upright hoisting frame is a regular pyramid made of structural steel through welding and is fixed on the outer frame of the device; a horizontal crosswise mass block guide rail and a horizontal longitudinal mass block guide rail are arranged in a cross form; the horizontal crosswise mass block and the horizontal longitudinal mass block, the horizontal crosswise viscous damper and the horizontal longitudinal viscous damper, and springs are respectively and symmetrically arranged on the guide rails; and the longitudinal mass block, the longitudinal viscous damper and the spring are mounted on the longitudinal mass block guide rail along an upright direction. The three-dimensional tuned mass damper is uniformly, stably and effectively stressed under the actions of wind vibration and earthquake, is suitable for important structures such as high-rise and towering buildings and nuclear power stations, and is capable of reducing the earthquake response of the building structure and effectively protecting the building structure.

A support apparatus for a child's safety seat allows the user to adjust the tilt of the safety seat while maintaining a child in a safe position. The support apparatus comprises a base portion, an upper portion connected to one end of the base portion, and a bottom portion connected to an opposite end of the base portion. The upper and bottom portions may be attached to the base by adjustable hinges, or they may be attached in a fixed position. A foot support is attached to the bottom portion. The bottom portion engages the floor of a vehicle for added support. The bottom portion further includes protective braces extending from the bottom portion and running vertically along its length. Multiple protective braces create channels in which children place their legs on foot supports within each channel. A child safety seat adapted to receive the invention is also disclosed.

The invention, which belongs to the measuring technology, relates to a sensitivity calibration method of a fiber Bragg grating strain sensor. In the invention, a four-point-bending equal-strength beam is used to calibrate a fiber Bragg grating strain sensor sensitivity. The method is characterized by: determining a position where the fiber Bragg grating is pasted on a standard beam; installing the standard beam on a fixed platform and using a standard beam fulcrum to support the standard beam on the platform; adjusting loading points of a loading beam so as to achieve uniform force on the standard beam; connecting the fiber Bragg grating sensor with a fiber Bragg grating demodulation device; applying a transverse force which is perpendicular to an axis on a midpoint of the loading beam, wherein an effect direction of the transverse force is superposed with a longitudinal symmetrical plane of the standard beam; applying load on the standard beam; using the fiber Bragg grating demodulation device to record wavelength change of the fiber Bragg grating; then calculating the strain of a beam surface and a sensitivity coefficient of the fiber Bragg grating so as to realize calibration. By using the method of the invention, uniform loading can be achieved; the uniform and stable force of the fiber Bragg grating can be guaranteed; a reliable parameter can be provided for technology research and measurement of the fiber Bragg grating sensor.

To provide a steering device for tilt and telescopic adjustments in which the locked condition can be made stronger, and when unlocked, tilt and telescopic adjustment can be smoothly carried out.A steering device, comprising: a fixed bracket having fixed side parts on both sides in the width direction; a movable bracket arranged between the fixed side parts; a friction plate fixed and oppositely arranged with a suitable gap with respect to at least one of the two fixed side parts of the fixed bracket; and a friction washer that is inserted between the fixed side part and the friction plate. A lock bolt passes through for connecting the fixed bracket, the movable bracket, the friction plate, and the friction washer to be freely locked and unlocked.

A piston connected to a piston rod is fitted in a cylinder having a hydraulic oil sealed therein. Flows of hydraulic oil induced by sliding movement of the piston are controlled by extension and compression damping force generating mechanisms and to generate damping force. In the extension damping force generating mechanism, the valve-opening pressure of a disk valve is controlled by the pressure in a back pressure chamber. An elastic seal member fixed to the disk valve is brought into sliding contact with an inner peripheral surface of a cylindrical portion of a valve member to seal the back pressure chamber. The disk valve is self-aligned by fitting between the elastic seal member and the inner peripheral surface of the valve member and secured by being axially clamped at an inner peripheral portion thereof in a state where a clearance is formed between the inner peripheral portion of the disk valve and a shaft portion of the piston rod, thereby reducing the requirements for coaxiality.

The invention belongs to the technical field of tunnel engineering construction, and provides a shallow-buried biased segment tunnel stratum reinforcement construction method aiming at solving the problems of potential construction safety danger and the like when a tunnel passes through a high-steep V-shaped gully biased segment with a shallow covering layer. The reinforcement structures comprise a ground line, net sprayed concrete, a reinforced concrete cover plate, a crown beam, slide-resistant piles, steel flora pipes and the tunnel. The whole reinforcement segment is reinforced by the steel flora pipes through grouting; a steel pipe needs to go deep into a tunnel bottom plate for more than 500mm; nets are hung at the ground surface, and concrete is sprayed for construction; the tunnel biased side mainly uses the slide-resistant piles; the slide-resistant piles need to go deep into the tunnel bottom for 5m; in addition, the crown beam is cast on the top of the slide-resistant piles; in addition, the reinforced concrete cover plate with the thickness being 500mm is arranged right above the tunnel and at the slide-resistant pile side; steel bars at a concrete cover plate and net spray concrete connecting part need to be welded together. The construction method effectively solves the problem of shallow-buried biased segment tunnel stratum reinforcement difficulty, and has the advantages that the work procedures are simple; safety and reliable are realized; the water and soil loss is prevented, and the like.

In a weather strip fitted to a body opening section, a bulkhead between a seal hollow chamber and a hollow chamber is so configured as to form an opening angle not smaller than right angle toward an outside of the body opening section constantly in each section, relative to a load input direction when a door panel is closed. The hollow section is constantly assumes an approximately the same deflection, irrespective of the input direction when the door panel is closed.

Disclosed is a rack bar supporting device of a steering apparatus for a vehicle which can prevent rattle noise generated due to clearance increase caused by the wearing of a rack bar and a support yoke in an endurance driving of a vehicle and maintain a uniform clearance between the rack bar and the support yoke after an endurance driving, thereby transferring stable steering force.

The invention discloses an intelligent electrically-driven cable arranging device of a marine winch. The device is that two groups of three-phase asynchronous motors are respectively connected with a power supply through transducers and are connected with a main shaft of a roller through a planetary gear; a permanent magnet synchronizing motor drives a rolling lead screw supported by a bearing to rotate by speed reduction through a speed reducer; the rolling lead screw drives a cable guide wheel to move leftwards and rightwards on a guide rail; a cable is arranged on the roller through a cable width sensor and the cable guide wheel; a first proximity switch and a second proximity switch are respectively mounted at two ends of the rolling lead screw; signals detected by a roller rotating speed detecting photoelectric encoder, a motor rotating speed photoelectric encoder and a photoelectric encoder are respectively input to an intelligent controller; the intelligent controller controls the working states of the three-phase asynchronous motors and the permanent magnet synchronizing motor. The device has the advantages of being good in cable arranging effect, reliable to work, high in real-time performance, automatic to adjust the working state according to the cable width, and capable of continuously working under a complex marine working environment.

The invention provides a magnetic levitation floor drain core, belongs to the technical field of fixing construction, and aims to solve the technical problem of high failure possibility of the automatic sealing performance of the conventional floor drain. The magnetic levitation floor drain core comprises a core body and a sealing cover, wherein a water inlet is formed in the upper end of the core body; a water outlet is formed in the lower end of the core body; a magnet II is arranged in the sealing cover; a housing with a sealed inner chamber is fixed at the lower end of the core body; a magnet I is fixed in the inner chamber of the housing and below the magnet II; the sealing cover is arranged between the water outlet and the housing; the sealing cover is tightly clung to the water outlet under the action of the repulsive force between the magnet I and the magnet II, so as to be sealed. Through the adoption of the magnetic levitation floor drain core, the automatic sealing performance of the floor drain can be kept effective for a long time.

To provide a steering device for tilt and telescopic adjustments in which the locked condition can be made stronger, and when unlocked, tilt and telescopic adjustment can be smoothly carried out. A steering device, comprising: a fixed bracket having fixed side parts on both sides in the width direction; a movable bracket arranged between the fixed side parts; a friction plate fixed and oppositely arranged with a suitable gap with respect to at least one of the two fixed side parts of the fixed bracket; and a friction washer that is inserted between the fixed side part and the friction plate. A lock bolt passes through for connecting the fixed bracket, the movable bracket, the friction plate, and the friction washer to be freely locked and unlocked.