35results about How to "Braking is simple" patented technology

The invention concerns a wheeled sports item (1; 15) suited to be applied to the foot of a user in order to allow the foot to slide in relation to the ground according to a movement direction (X) parallel to the foot, for example a roller ski (1) or a roller skate (15), comprising: an elongated body (2; 17) associated with two wheels (3a, 3b; 22); a platform (5; 18) associated with the elongated body (2; 17), defining a supporting surface (5a) for the foot; and means (6; 20) for braking the wheels (3a, 3b; 22). The item (1; 15) comprises also means (7) for connecting the platform (5; 18) to the elongated body (2; 17), which define a rotation axis (Y) orthogonal to the supporting surface (5a), in order to allow a rotation of the foot, and control means (8) sensitive to the rotation of the foot for the operation of the braking means (6; 20).

The invention discloses a spring friction brake one-way coupling damping belt wheel. The spring friction brake one-way coupling damping belt wheel comprises a threaded mandrel, wherein the mandrel stretches into a belt hub; a friction stop ring and a positioning sleeve are pressed into the inner wall of the belt hub; the outer diameter of the mandrel forms a convex ring; the convex ring is provided with steps; a gasket is sleeved with the exterior of the mandrel and forms steps; a damping spring is sleeved with the exterior of the mandrel; one head of the damping spring is propped against the convex ring of the mandrel; the end face of the head is propped against the steps of the convex ring; the other head of the damping spring is propped against the gasket; the end face of the head is propped against the steps of the gasket; a friction sliding ring is sleeved with the exterior of the gasket in a rotary fit mode; a friction spring is sleeved with the exterior of the damping spring; one head of the friction spring is arranged in the friction sliding ring and the other head of the friction spring is arranged in the friction stop ring; the outer wall of the friction sliding ring is in clearance fit with the positioning sleeve; the inner diameter of the friction stop ring and; the inner diameter of the friction sliding ring is smaller than the outer diameter of the friction spring, so that the tensile force of the spring is increased; the friction spring as well as the friction stop ring and the friction sliding ring are locked through friction, and can be separated alternately.

The invention relates to a method for algae removal of aquiculture water by use of a high-voltage pulsed electric field and belongs to the technical field of aquiculture. The method adopts a specific process and such specific parameters as output voltage of 18-25 kv, pulse width of 12-20 [mu]s and pulse frequency of 50-80 Hz; then a generator is started up for circulating water treatment for 2-3 times, circulating treatment of aquatic water effectively breaks algae floccules and cell lethal, the algae removal ratio is 96-97 percent, and the algae control purpose is achieved; meanwhile, a coagulant (polyaluminium sulfate) and a sludge pumping machine are provided to realize algae body flocculation and sedimentation and withdrawal, and the algae removal ratio can be increased to 100 percent to the utmost extent; algae decomposition for algal toxin release is prevented, and the healthy environment of aquatic water is effectively guaranteed. The method provided by the invention is a physical method, is good in effect, most direct, free from secondary contamination and low in cost, can remove all algae and is very suitable for being applied to algae removal of aquiculture water.

An elevator, which comprises an elevator car (1), which is arranged to move in the elevator hoistway (S), a brake (2) on the elevator car (1), a lever mechanism (12,17,18) connected to the brake (2), by- moving which lever mechanism in relation to the elevator car the brake (2) can be transferred to the braking position, a detent (5) in the elevator hoistway, a detent (6) on the elevator car, via which detent the aforementioned lever mechanism can be moved in order to cause braking of the brake (2), and which detents (5,6) on the elevator car and in the elevator hoistway can be brought, by moving at least one of the detents (5,6), to a relative position, in which the detents (5,6) are on a collision course. The elevator comprises - controllable means (7,8,9) for affecting the position of the detent (6), by controlling which means (7,8,9) the detent (6) can be moved between position I and position II, in which position I the detent (6) on the elevator car and the detent (5) in the elevator hoistway are on a collision course with each other, and in which position II the detents (5,6) are not on a collision course, - a control (10) for controlling the means (7,8,9).

The invention discloses a safe low-temperature brake which comprises a brake hub, brake pieces and a brake foot, wherein the brake hub is connected with a hub; the brake foot is connected with a shaft head; through pivot holes are formed in the brake hub wall and the brake pieces respectively; the brake pieces are fixedly connected with the inner wall of the brake hub through hollow pivots. The brake pieces of the safe low-temperature brake are fixedly connected with the inner wall of the brake hub through the hollow pivots, so that air inside and outside the brake hub can be circulated, heat dissipation is facilitated, the air can be 'thrown' out under the centrifugal force when the brake hub is rotated in an automobile running process, the air inside the brake hub can be continuously replaced, and the temperature of a brake assembly can be rapidly and effectively reduced, so as to effectively prevent the situation that the brake hub is too hot or fire is caused to a tire; the air can be replaced, at the same time particles caused by friction can be discharged out in time, the smoothness of a friction surface can be improved, the brake effect can be ensured, and furthermore the service lives of the brake pieces and the brake foot can be prolonged.

A synchronous valve for brake system has a valve body with air inlet, air outlet and control opening, an air inlet valve in said air inlet and opened when the car is running, a piston in said controlopening for controlling said air inlet valve and several sealing rings. Said piston has an internal air channel for exhausting the residual air from braking tube, a screw plug for regulating its top limit position, and a restoring spring under its bottom.

An electric working machine includes: a motor; a drive unit configured to be driven by the motor; a trigger switch configured to allow the motor to rotate; a power supply unit configured to supply power to the motor; a control unit configured to control the rotation of the electric motor, characterized in that the electric working machine further includes a switching element configured to short-circuit between terminals of the electric motor to apply electronic braking, In this case, the control unit is designed to regulate the brake by controlling the switching element when the electric machine is stopped.

The invention relates to a method and device for controlling a drive unit in which a maximum permissible value of an output quantity is determined. This value is compared with the actual value, and reaction measures are initiated when the maximum permissible value is exceeded by the actual value. The maximum permissible value is filtered at least in one operating state according to a filtering means comprising a filter and a dead zone element. In addition, the maximum permissible value is continuously reduced according to the convergence of at least one quantity, which represents an operating state, to a limiting value.

The invention discloses an electromagnetic brake motor with a spiral blade fan. The electromagnetic brake motor comprises an electromagnetic brake which is fixedly connected with the back end cover of a motor; the electromagnetic brake is provided with a brake disc in a sliding way; the rotating shaft of the motor is extended out of the back end cover of the motor; the shaft end of the rotating shaft of the motor is fixedly sleeved with a motor fan which is rotated integrally with the rotating shaft; the motor fan is provided with at least two spiral blades with spiral inclination angles; oneside surface of each spiral blade is connected with an annular disc which is coaxial with the rotating shaft; a brake surface is reserved on each annular disc; and the brake discs and the brake surfaces are in friction brake. The electromagnetic brake motor breaks through conventional fixed thoughts, utilizes the spiral blades of a fan as the brake surfaces, has very high brake performance and radiating and cooling effects, integrates double functions of braking and cooling, can ensure each part of the motor at a safe operating environmental temperature, and prolongs the service life of equipment.