157 results about "Blast damper" patented technology

An aircraft landing gear includes a sealed cylinder divided by a cylinder head to define an upper chamber and a lower chamber. The lower chamber is further divided by a piston having a piston rod passing in a sealed manner through the lower cylinder end. The cylinder head includes one or more orifices, the opening of each containing an electromagnetic coil configured to control the viscosity of the magneto-rheological oil passing therethrough. The electrical current through the electromagnetic coil is continually controlled by a microcomputer with attached sensors for piston position and pressure between the desired piston and the cylinder head, such that the pressure between the piston and the cylinder head decelerates the aircraft evenly throughout the desired piston stroke. The pressure also is limited to a desired maximum level so that, in a severe crash, the shock absorber will absorb significant energy before it fails structurally.

A gas shock absorber has a pressure tube which defines a working chamber. A piston assembly divides the working chamber into an upper working chamber and a lower working chamber. A plurality of extension passages extend through the piston assembly and are opened and closed by an extension valve assembly. A plurality of compression passages extend through the piston assembly and are opened and closed by a compression valve assembly. A rod guide assembly is located between the pressure tube and the piston rod. The rod guide assembly includes an oil chamber for sealing and lubricating the piston rod. An axially movable piston maintains the pressure within the oil chamber equal to the pressure in the upper working chamber.

The invention discloses a gas oil spring, especially a gas oil spring that can control the extension length and change pressure and support force automatically as the spring element on the vehicle suspensions. The outer cylinder store the oil and high pressure air, the inner cylinder is used as working cylinder; pressing the oil out of the outer cylinder to improve the oil, air is compressed or expansion and has the function of spring. When the piston moves up and down, draw the outside oil into the outer cylinder to enhance the extension distance and attenuate part of the extension power to play the function of buffer. When the extension distance get the limit height, the decompression valve is driven to exhaust the additional oil in the outer cylinder, make the extension height and support force adapt the load status under the function of the oil cycling.

An air spring and shock absorber unit for use in vehicle suspension systems or cab suspension systems comprising a shock absorber mounted within an air spring. The lower end of the air spring bellows is attached to the air spring piston in such a manner which enables the lower end of the bellows to be disconnected from the air spring piston without damaging the crimp ring which connects the bellows to the piston.

A method and portable apparatus for servicing a shock absorber on a landing gear assembly of an aircraft in a weight-on-wheels state is disclosed. The shock absorber includes at least one chamber containing both hydraulic fluid and a gas in fluid communication with each other. The apparatus includes a source of gas and a source of hydraulic fluid. The amount of hydraulic fluid in the chamber is corrected, preferably such that the chamber is then filled with a known amount of degassed hydraulic fluid. A pre-set mass of gas is then delivered into the chamber under the control of a gas delivery system of the portable apparatus. More accurate servicing of a shock absorber may thus be provided since account is additionally taken of gas dissolved in hydraulic fluid. By delivering a pre-set mass of gas into the chamber, there is no need to rely on a measure of gas pressure or H-dimension (h) when servicing the shock absorber.

A motorcycle, having both left and right mufflers, has an exhaust structure which enables an increase in the allowable margin through which the rear wheel is permitted to rise. A main exhaust pipe extends from an engine to one side of a shock absorber disposed on the rear side of the engine. The main exhaust pipe is branched in the vicinity of the shock absorber into a first branch pipe and a second branch pipe. The first branch pipe is connected to a first muffler disposed on the same side as the main exhaust pipe, and the second branch pipe is connected to a second muffler after passing between the shock absorber and a rear wheel to the opposed side of the vehicle body. The second branch pipe does not interfere with the rising motion of the rear wheel, and a sufficient allowable margin is secured for the rear wheel.

The present invention relates to a solenoid valve configured to be mounted to a shock absorber of a vehicle to adjust damping force. solenoid valve of a shock absorber in which a damping force is adjusted through adjustment of back pressure against a disc valve. The solenoid valve includes a back pressure chamber for generating back pressure against the disc valve by a fluid introduced through a back pressure adjusting flow passage, and a spool moved in a spool guide by operation of a solenoid to control opening / closing or opening rate of the back pressure adjusting flow passage. The back pressure adjusting flow passage includes a variable orifice with an opening rate of the variable orifice being adjusted by the spool and the spool guide, the back pressure chamber, and a fixed orifice formed on the disc valve.

The present invention are directed towards a system and method for providing a way of reducing the vibrations and wear between mating components of a gas turbine combustor. The gas turbine combustor includes a flow sleeve having a plurality of liner stops and a combustion liner located radially within the flow sleeve. Spring dampers are positioned between the combustion liner and the flow sleeve to restrict the relative movement between the flow sleeve and the combustion liner and dampen vibrations at their assembly location. The spring dampers are capable of compressing to permit thermal growth between the combustion liner and flow sleeve.

The invention relates to an automobile suspension damper hydraulic position limit technology, in particular to a hydraulic position limit variable damper which can have the function of a normal damper and also can replace an elastic position limiter made of rubber in a normal suspension. The invention comprises a damper working cylinder, an oil storage cylinder sleeved at the external side of the damper working cylinder, a main piston matched with the damper working cylinder, and a compressed unloading valve and an oil inlet valve arranged on a bottom valve seat of the damper working cylinder. The invention is characterized in that a floating piston with an axial perforated oil liquid main passage at the middle part is arranged between the main piston and the bottom valve seat; the periphery of the floating piston oil liquid main passage is provided with a position limit damping hole; a position limit spring is arranged between the bottom valve seat and the floating piston. The invention can generate normal damping function, and can replace the elastic position limiter in the normal suspension made of rubber. The invention has better damping characteristic compared with the rubber position limiter.

A first piston and a second piston coupled to a piston rod are fitted in a cylinder, and an intermediate chamber is formed between the first and second pistons. A compression-side check valve and an extension-side check valve are provided at the first piston and the second piston. An extension-side main valve and a compression-side main valve are disposed in the intermediate chamber. A downstream side of a damping force adjusting valve is connected to the intermediate chamber. Inner pressures of an extension-side backpressure chamber and a compression-side backpressure chamber are adjusted by the damping force adjusting valve, whereby valve opening of the extension-side and compression-side main valves is controlled. Hydraulic fluid of the downstream side of the damping force adjusting valve is first sent into the intermediate chamber, and then is sent to a cylinder upper chamber or a cylinder lower chamber. Due to this arrangement, it is possible to prevent a sudden drastic change in a hydraulic fluid pressure and thereby to generate a stable damping force.

Means for attenuating the seating force of a cam-actuated poppet valve such as an exhaust gas recirculation valve in an internal combustion engine including a shock-absorber disposed between the valve stem and valve head. In a currently preferred embodiment, the shock-absorber is a wave washer disposed around the valve stem and captured between the valve stem and the valve head, between which axial motion is allowed. After the valve head engages the valve seat to close the valve, any further travel of the actuator cam and valve stem is absorbed by compression of the wave washer, thus attenuating additional force on elements of the valve actuation train. In opening the valve, the reverse occurs, in that initial motion of the actuator cam and valve stem serves to relieve compression of the wave washer, followed by removal of the valve head from the valve seat.

A shock absorber of a monotube type utilizes a mechanically fixed base valve to regulate oil flow between the compression and compensation chambers, and a compressible bladder in the compensation chamber to allow volume compensation, which, together, eliminate the need for pressurized gas and a floating piston found in conventionally known monotube dampers.

An article of footwear has ventilation and shock absorption provided by a mechanism which may be constructed within or added to the footwear. A first chamber beneath the heel draws external air through a conduit which includes a one-way valve. As a wearer walks, the heel compresses the first chamber, forcing the air through a special second valve causing directional airflow to a second chamber in a controlled manner thereby absorbing the shock of the heel strike in the same manner a shock absorber functions in an automobile. As weight is transferred from the heel to the ball of the foot, further cushioning is provided by the second chamber. Specifically designed vents connected to the second chamber allow air to be forced into the region of the shoe around the foot. Expansion of the air from these vents affects cooling and drying of the foot through evaporation and convection.

The present invention are directed towards a system and method for providing a way of reducing the vibrations and wear between mating components of a gas turbine combustor. The gas turbine combustor includes a flow sleeve having a plurality of liner stops and a combustion liner located radially within the flow sleeve. Spring dampers are positioned between the combustion liner and the flow sleeve to restrict the relative movement between the flow sleeve and the combustion liner and dampen vibrations at their assembly location. The spring dampers are capable of compressing to permit thermal growth between the combustion liner and flow sleeve.

The invention relates to a circulating lubrication type shock absorbing structure. The circulating lubrication type shock absorbing structure comprises a connecting rod, a connecting cylinder and shock absorbing springs. A blind hole is formed in the upper end face of the connecting rod. Positioning column heads are arranged in the shock absorbing springs in a penetrating mode. A cross rod locatedabove the connecting rod is arranged at the connecting cylinder. The upper ends of the positioning column heads are connected with the cross rod. A compression plate isolates a connecting rod portionoil chamber and an oil hopper located above an oil storing cavity in the blind hole. Oil discharging holes penetrating through the connecting rod portion oil chamber is formed in the lateral wall ofthe blind hole. The oil discharging hole is internally provided with a plug and an oil discharging hole closing spring driving the plug to move to the connecting rod portion oil chamber to seal the oil discharging hole. A connecting seat is provided with an oil return hole communicating an annular oil collecting groove with the connecting rod portion oil chamber. The oil return hole is internallyprovided with a connecting rod portion one-way valve opened to the interior of the connecting rod portion oil chamber. The circulating lubrication type shock absorbing structure has the advantages that shaking is little and automatic lubricating is achieved, and is used for solving the problem that an existing shock absorbing machine is liable to shake in the radial direction between two moving components.