71 results about "Dashpot" patented technology

A head stabilizing system is provided. The head stabilizing system is intended to minimize loads on the head and the neck, some of which may be injurious or even fatal, by generating a reaction force that substantially opposes a force acting on the head and generated by rapid deceleration of a vehicle or a crash impact. The head stabilizing system includes a helmet, a connection structure, and at least one resisting member. The resisting member generates a reaction force that opposes the crash impact force, yielding a reduced net force on the head. This reaction force can be generated as a function of position, velocity or acceleration. The resisting member may include a tether, a dashpot, or a dashpot containing a controllable rheological fluid. The viscosity of the controllable rheological fluid can be automatically adjusted in response to changes in status of a vehicle or it's occupant.

A head stabilizing system is provided. The head stabilizing system is intended to minimize loads on the head and the neck, some of which may be injurious or even fatal, by generating a reaction force that substantially opposes a force acting on the head and generated by rapid deceleration of a vehicle or a crash impact. The head stabilizing system includes a helmet, a connection structure, and at least one resisting member. A mounting element is provided to be mounted onto the helmet to connect to the at least one resisting member. The mounting element is preferably attached to the helmet by an adhesive. The resisting member generates a reaction force that opposes the crash impact force, yielding a reduced net force on the head. This reaction force can be generated as a function of position, velocity or acceleration. The resisting member may include a tether, a dashpot, or a dashpot containing a controllable rheological fluid. The viscosity of the controllable rheological fluid can be automatically adjusted in response to changes in status of a vehicle or it's occupant.

A steering damper system and method of regulating the fluid pressure of such a system are provided. The system can comprise a piston rod, a cylinder, a passage, and a damper portion. The damper portion can comprise a damper cavity, an outer piston, an inner piston, and a biasing component. The damper cavity can be in fluid communication with the passage. The outer piston can be slidably disposed in the damper cavity and define a chamber and a duct that is in fluid communication with the chamber and the passage. The inner piston can be slidably disposed in the chamber of the outer piston. The biasing component can exert an axial biasing force against the inner piston for regulating the pressure of fluid disposed in the system passing intermediate the passage, the damper cavity, and the chamber of the outer piston.

A regulable dashpot with shock-absorption force controls, especially intended for motor vehicles, with at least one flow-regulating system including one or more shock-absorption components for the compression phase and/or for the decompression phase. The object is to allow the dashpot to shift continuously between the hard and soft phases, whereby the valve-adjustment intervals can be varied at intervals that are not unnecessarily short or even unattainable. At least one valve assembly is accordingly supplied with variable flow impedance by a regulating valve (5 or 6).

An injection device, method, and system for drug delivery includes a primary container for storing a drug, the container having a stopper movably disposed in the container for expelling the drug, an injection drive mechanism comprising a plunger for acting on the stopper and an energy source for exerting a force on the plunger to cause the plunger to act on the stopper to expel the drug, the force causing the plunger to accelerate to a velocity prior to acting on the stopper, and a damping mechanism for reducing the velocity of the plunger prior to acting on the stopper. The damping mechanism can include a dashpot or an energy absorbing material associated with the plunger. Alternatively or additionally, the damping mechanisms can include absorbing material disposed between support members of an outer casing of the injection device and the primary container.

An assembly for a hydraulic dashpot. The dashpot is accommodated in an overall housing (1) and provided with a shock-absorbing piston (3) traveling back and forth inside the housing on one end of a piston rod (2) and partitioning the housing into two compartments (19&23), and a vibration-compensating piston (11) hydraulically paralleling the first piston and accommodated inside a subsidiary housing (10).

The object of is to ensure a solid and reliable connection between the shock-absorbing piston and the piston rod while allowing as much of the piston rod as possible to find support inside the housing.

The vibration-compensating piston is accordingly an annular piston and travels back and forth with its inner surface resting against a section (9) of the piston rod adjacent to the fastening for the shock-absorbing piston, and with its outer surface against the inner surface of the subsidiary housing.

A dual check and high pressure relief valve that is able to perform the function of a hydrostatic high pressure relief valve and a check valve. The new valve has two poppets separated by a spring that are within two seats within a guide and secured by a plug. By adjusting the seats the relief pressure setting is set. The dual check and high pressure relief valve has three separate passageways that allow fluid flow between different combinations of the passages depending upon the function desired within the hydrostatic circuit. A dashpot is also included between the two poppets to provide positive dampening of the system.

A control rod having a lower tip absorber material which exhibits substantially lower irradiation induced swelling than a second absorber material which extends above the lower tip absorber material. The lower tip absorber material having a substantially lower reactivity worth than the second absorber material, extends from a lower end plug of the control rod to an elevation just above a dashpot in a thimble guide tube in a nuclear fuel assembly when the control rod is fully inserted within the thimble guide tube.

The invention provides a pneumatic two position two-way piston-type multi-medium bevel seat valve, which is characterized in that the bevel seat valve comprises a two position two-way piston-type multi-medium bevel seat valve body. The valve body is hermetically connected with a bottom cover which is arranged at the front end of a cylinder body through a connecting sleeve; a piston rod, with one end being arranged in the cylinder body and hermetically connected with a piston, and the other end being arranged in the valve body and hermetically connected with the valve, is arranged at the middle part of the cylinder body and the connecting sleeve; a spring is arranged between the back end of the piston and the cylinder body, and a dashpot piston is fixedly arranged at the front end of the piston; a buffer module is fixedly arranged at the back end of the bottom cover, a buffer ring is arranged between the buffer module and the dashpot piston, a valve sealing gasket is arranged on the valve, and gas inlet and outlet ports are arranged on the backside of a cylinder wall and the bottom cover respectively; and the spaces between the piston and the cylinder wall, the bottom cover and the cylinder body, and the piston rod and the connecting sleeve are sealed. The invention has the advantages of small noise, good using performance, the adoption of air as the power source, convenient use, environmental friendliness, easy-integrated automatic control, high working efficiency, high-temperature resistance, high-pressure resistance, and multi-passage circulation control.

The invention provides the method for producing molded coal with coking organic waste and baking coal. The method uses coking organic waste as binding agent, and then it is mixed with baking coal. The molded coal can be used as coking material. The method comprises baking coal breaker, coal dashpot, coking organic waste stirring device, coking organic waste dashpot, preliminary hybrid arrangement, homogeneous hybrid arrangement, and forming machine. The invention has the advantages of intimate mixing, high forming, solving environmental pollution, improving coke quality, save cost.

Hydraulic valve actuation systems and methods to provide multiple lifts for engine valves using fixed or hard stops at each lift. The fixed or hard stops provide a very repeatable selection of engine valve lifts dependent on engine operating conditions. For full valve lift, unidirectional hydraulic dashpots are used to decelerate the engine valve, both as it approaches the full lift fixed stop, and as the engine valve approaches the valve seat from the engine valve full lift position. Various embodiments and methods of operation are disclosed.

A hydraulic dashpot with a cylinder (1), a piston (4), and a bypass. The cylinder is charged with fluid. The piston partitions the cylinder into two compartments (7&8), travels back and forth therein on the end of a piston rod (2), and is provided with breaches and valves. The open cross-section of the bypass can be expanded and contracted and fixed in accordance with the direction the piston is traveling in, depending on whether the dashpot is in the compression or in the suction phase. The bypass is provided with an axially displaceable control component. One end of the control component comes to rest against a valve, its displacement being limited by stops. The bypass is accommodated in an axial bore through the piston rod. The bypass operates in conjunction with various outlets that open into the compartments. The control component is provided with at least one lateral flange and travels back and forth in at least one tube. The object is a smooth performance curve and low wear. The control component is accordingly in several parts, comprising at least two bypass control caps that axially travel up to stationary stops. The caps, in conjunction with axially variable components (18&21) that dictate the size of the open cross-section in both the compression and the suction phase, create a port.

The magnetic damping method and the dashpot are to form the air space to generate the damping effect by the repellant formed between the magnetic poles. The dashpot is set with the up magnet and the down magnet according to the same polar between which the air space with the thickness changed by the load or vibration is formed from the repellant. The dashpot has the simple structure, low cost and not only decreases the vibration disturbance of 20Hz but below 20Hz.

A nuclear fuel assembly having a tube-in-tube control rod guide tube design that incorporates an end plug that extends axially upward to an elevation above the lower most grid where it is sealed at its tipper end to the lower end of the control rod guide tube. The guide tube lower end plug has a threaded recess in its upper surface that mates with a corresponding dashpot end plug threaded extension that is formed as an insert in the lower end of the guide tube. A hole formed through the outer wall of the guide tube end plug at the elevation of the lower portion of the recess provides a positive inspection port for assuring the proper seating of the dashpot. A method of manufacture of such a fuel assembly is also disclosed.

The invention relates to a measurement device of a polymer viscoelastic model and a measurement method of model element parameters, which relate to a measurement device of a viscoelastic model and a measurement method of model element parameters. The measurement device of the polymer viscoelastic model and the measurement method of the model element parameter are established to solve the problemsof a classic viscoelastic model that: the classic viscoelastic model is only an abstract model on paper and can not be a practical mechanical model. In the device of scheme 1: springs are connected with dashpots in series. In the device of scheme 2: springs are connected with dashpots in parallel. In the device of scheme 3: one of the two springs is connected with one of the two dashpots in series to form a Maxwell model, the other spring is connected with the other dashpot in parallel to form a Kelvin model and then the Kelvin model is connected with the Maxwell model in series. The method comprises the following steps: obtaining stress relaxation curves by the measurement device of the Maxwell model; obtaining creep curves by the measurement device of the Kelvin model; applying a constant stress sigma 0 on the measurement devices of four element mechanical models to obtain creep curves. The method can be used for establishing the practical polymer viscoelastic mechanical model.

A spin chuck for holding semiconductor wafers includes one or more damping mechanisms to limit the force with which chuck pins impact the wafer edge following wafer shift. The damping mechanism may be a linear or rotary dashpot. The dashpot or dashpots are mounted on a surface of the chuck body and include a control arm that contacts a common gear ring that in turn drives the chuck pins during radially inward and outward movement.

The present invention discloses a multifunction socket and a socket box body. The socket box body comprises an outer frame, a flip cover, a bottom shell and sockets. The flip cover is a double-door structure, the flip cover is connected on the outer frame via a flipping structure, the outer frame is fixed on the bottom shell to form a box body, and a plurality of sockets are fixed in the box body. The flipping structure mainly comprises successively connected rotating shafts, torsion springs, hooks, a damper, the rotating shafts and a hook needle, and the flipping structure can realize back-and-forth movement and automatic fixation of the flip cover. According to the multifunction socket, the flipping structure can realize back-and-forth movement and automatic fixation of the flip cover; according to the structure, the occupied utilization area because of the size of the socket is greatly reduced; and meanwhile, the structure can effectively prevent the sockets and other modules from being exposed to the outside, and the structure can effectively prevent the sockets and other modules from contacting dust by closing "double doors" when the socket is not used.