A torque impact mitigator including a housing assembly having a hydraulic cylinder. A piston is disposed within the hydraulic cylinder. A piston rod is mounted at a first end to the piston and having a second end extending out from the compression end. A compression spring is disposed between the piston and an end of the cylinder. A rod clevis is secured to the second end of the piston rod to compress the compression spring into a compressed state when the rod clevis is moved away from the cylinder and to release the compression spring into a relaxed state when the rod clevis is moved towards the cylinder. A plug is disposed within an upper end of the compression spring and having a bore extending therethrough to receive the piston rod. One or more bores are disposed through the piston to allow passage of hydraulic fluid into the hydraulic cylinder.

Provided is a matrix type double parallel capillary tube shock absorber with a variable system natural frequency, wherein on a pipeline between oil supply ports of an upper oil compartment (14) and a lower oil compartment (16), a capillary tube parallel type damping associated section and a capillary tube parallel type system natural frequency associated section are successively connected from top to bottom; the capillary tube parallel type damping associated section comprises four capillary tubes connected in parallel, with each capillary tube being connected in series with a solenoid valve so as to control the operation of the capillary tube; the capillary tube parallel type system natural frequency associated section comprises four capillary tubes connected in parallel, and each of the four capillary tubes is connected in series with a solenoid valve so as to control the operation of the capillary tube; the diameter of the smallest capillary tube of the frequency adjustment section is much larger than the diameter of the capillary tube of the resistance adjustment section; and in a matrix type operation state table, the configuration value S.sub.mn of the solenoid valves of the frequency adjustment section is selected according to situations, and by way of changing the mass, the problem of the system natural frequency of a hydraulic shock absorber for a vehicle being not adjustable or having a small adjustable range can be solved. Further provided is a method for operating a matrix type double parallel capillary tube shock absorber with a variable system natural frequency.

An apparatus for protecting a handheld device using a spring-based mechanism is described. The apparatus includes one or more protection means, an actuation unit and at least one sensor. The actuation unit includes a plurality of actuating elements, a spring, a loading element and a damper coupled to the spring. The plurality of actuating elements is configured to actuate the actuation unit to unfold the spring and push the damper coupled to the spring in the direction of the protection means to slide the protection means from the stowed position to the deployed position when the sensor detects the dropping event.

An apparatus for protecting a handheld device using a spring-based mechanism is described. The apparatus includes one or more protection means, an actuation unit and at least one sensor. The actuation unit includes a plurality of actuating elements, a spring, a loading element and a damper coupled to the spring. The plurality of actuating elements is configured to actuate the actuation unit to unfold the spring and push the damper coupled to the spring in the direction of the protection means to slide the protection means from the stowed position to the deployed position when the sensor detects the dropping event.

Disclosed are a compound impact-resistant device and an application thereof. The compound impact-resistant device includes an inner cylinder, a first pressure sensor and an outer cylinder; an inner cavity of the inner cylinder is connected to a magnetorheological damper, a spiral valve element, a floating piston and a spring from bottom to top; and the outer cylinder is connected to a piston rod, a bottom end of the piston rod penetrates a top of the inner cylinder, the spring and the floating piston to be connected to the spiral valve element, and a portion below the spiral valve element is filled with hydraulic oil. The compound impact-resistant device can provide specific initial support force and achieve active self-adaptation to dynamic impact, thus solving the problems that traditional hydraulic buffers cannot provide initial support force and traditional mechanical crushing members have difficulty in providing large support force.

A trigger activated arm may use a piston moving within a cylinder to dampen gun bolt speed. In some embodiments, gun bolt motion increases pressure within the cylinder bore to dampen rearward gun bolt speed. The pressure may be high enough to unseat the cylinder creating a vent that cylinder fluid exits. In other embodiments, gun bolt motion decreases pressure within the cylinder bore to dampen forward gun bolt speed.

Spring seat vibration damper apparatus for use with fluid pressure regulators are disclosed. A disclosed apparatus includes a first spring seat of a fluid pressure regulator defining a first protrusion and a second spring seat of the fluid pressure regulator defining a second protrusion. The second protrusion is configured to receive at least a portion of the first protrusion. The first spring seat moves relative to the second spring seat to provide a damping effect between the protrusions.

A stabilizer comprises a damper having a housing and a piston rod. An inner adapter is associated with the damper for securing a first end of the damper to one of a first component or a second component. An outer adapter assembly is coupled to a distal end of the piston rod for coupling to the other of the first and second component. A one-piece spring seat is coupled to the housing of the damper so as to be held axially stationary relative to the housing. A coil spring is supported by the one-piece spring seat and the outer adapter assembly. The one-piece spring seat enables the coil spring to return the stabilizer to a neutral position regardless of whether the coil spring is under tension or compression.

A hinge device connecting a door rotatably to a washing machine main body, which enables the door to be closed smoothly and slowly, and to be opened easily.

A brake operating device to improve a brake feeling by a simple structure without a hydraulic source or an electric power source. A first reaction force establishing mechanism as an elastic member establishes the reaction force against the pedal force applied to the brake pedal. A second reaction force establishing mechanism increases the reaction force when depressing the brake pedal. The first reaction force establishing mechanism and the second reaction force establishing mechanism are arranged coaxially in series.