56results about How to "Reduce chamber volume" patented technology

A fluid energy transfer device, including a chamber for receiving a fluid, at least a portion of the chamber comprising a movable portion relative to another portion of the chamber, the movable portion being adapted to change the volume of the chamber from a first volume to a second volume by movement of the movable portion. The device further includes an actuator attached to the movable portion, wherein the displacements of the movable portion can be larger than the displacement of the actuator.

Methods and devices for passively assisting the cardiac function of the heart are disclosed. A method of increasing the cardiac output of a heart includes providing a site of surgical access to the portion of the heart to be restrained, reducing the cardiac expansion of the portion of the heart to be restrained, and maintaining the reduction of cardiac expansion of the portion of the heart to be restrained for a substantial amount of time. Cardiac assist devices for increasing the cardiac output of the heart are disclosed comprising a reinforcing portion configured to contact a portion of the heart tissue wherein the reinforcing portion restricts the expansion of the portion of the heart tissue. The reinforcing portion can be a number of structures, including pads, frames, straps, and other retaining means for limiting cardiac expansion of the portion of the heart tissue to be restrained.

A pulley assembly for a rotary device such as an automotive alternator comprising a pulley, a hub, and one or more elastomeric springs to cushion and attenuate the effect of sudden rotational velocity variations of the pulley and the hub. Premature spring failure is prevented by a mechanical stop arrangement that limits the amount of relative rotation between the pulley and hub to prevent over-compression of the springs.

An eye covering such as a contact lens may comprise one or more structures to pump tear liquid under the covering such that the covering can remain in the eye and correct vision for an extended amount of time. In many embodiments, the covering comprises a material having fenestrations to draw tear liquid under the covering and an outer portion shaped to contact the conjunctiva over the sclera, such that when the eye closes pressure of one or more eyelids urges tear liquid through one or more fenestrations and under the outer portion shaped to contact the conjunctiva. When the eye blinks, the pressure of the one or more eyelids can urge the covering toward the cornea such that tear liquid can pass through the fenestrations.

A container has a hollow receptacle element (10) for holding a medium to be dispensed, and a dispensing opening (12) communicating with a hollow chamber (14) of a sealing element (18). The sealing element (18) is detachable by a point of separation (20). To reduce the free volume of the hollow chamber (14), opposite wall components (22) of the sealing element (18) are displaced into the hollow chamber (14). The dispensing medium stored in the receptacle element (10) is prevented from being able to unintentionally penetrate into the hollow chamber (14) where it would no longer being available for a removal process. The invention also relates to a device for production of such a container.

A hydraulic traction system for vehicles is described. The system comprises a hydraulic vane motor mounted at each wheel of the vehicle, and equal number of identical hydraulic vane motors operated as engine driven pumps, and a control system for regulating the flow and direction of hydraulic oil during operation. The hydraulic motor is of a novel design that has a hollow non-drive shaft that accepts incoming hydraulic oil, this allows internal components of the hydraulic motor to be arranged in such a way to improve the efficiency of the hydraulic traction system.

A single-substrate apparatus for wet chemical processing of one or multiple sides of a substrate is described. Embodiments of the present invention enable multiple chemicals to be applied to the substrate in succession and reclaimed substantially free of cross contamination between chemicals. In an embodiment of the present invention, a rotatable fluid diverter is positioned between a rotatable pedestal and a nonrotatable multi-level catch cup to funnel fluid shed from a substrate to a predetermined level of the catch cup. The rotatable fluid diverter is designed to expel fluid over a narrow spray angle and thereby enable the pitch of the levels in the catch cup to be reduced so that the chamber volume of the single-substrate apparatus is reduced. In another embodiment of the present invention, the rotatable pedestal is moveable so that the fluid shed from the substrate can be directed to away from the multi-level catch cup.

The invention discloses a hydrostatic test compensator. The hydrostatic test compensator is a cylinder which can bear the external pressure not less than the pressure size of the hydrostatic test for a pipe without damage; the cylinder is a solid cylinder or is in a hollow shell structure with the two ends sealed by adopting sealing heads. The invention also discloses a method of carrying out pipe hydrostatic tests, and the method comprises following steps: propelling the hydrostatic test compensator into a pipe to be tested, then fixing the pipe to be tested, which has been stuffed with the hydrostatic test compensator, and the hydrostatic test compensator to a hydrostatic test machine, and then carrying out hydrostatic tests according to normal methods. When the hydrostatic-test compensator is used for the hydrostatic test of the pipe, due to the capability of bearing the external pressure, the hydrostatic-test compensator is not deformed in the process of the hydrostatic test of the pipe, so that the water feeding time and the water discharging time in the hydrostatic test can be greatly reduced, and therefore the whole time for the hydrostatic test of the pipe is reduced and the efficiency of the hydrostatic test is increased.

A method and apparatus for dispensing small volumes of fluid using a pneumatic control valve connected to the intake port of a pump having a chamber of variable volume, connecting the outlet port of the pump to the inlet port of a high speed flow control valve and a long, small diameter nozzle to the outlet port of the flow control valve, to aspirate a fluid to be dispensed into a long, small diameter nozzle by closing the pneumatic control valve, opening the flow control valve and partially expanding the volume of the pump chamber, then closing the flow control valve and further expanding the volume of the pump chamber to increase the gaseous volume within the pump chamber, pressurizing the gas within the pump chamber by closing the pneumatic control valve and reducing the volume of the pump chamber, finally dispensing a measured amount of fluid by briefly opening the flow control valve for a measured time to allow controlled amounts of fluid to be dispensed through the nozzle.

A liquid cooling device includes a base (1), a passive impeller (3) and a cold plate (4). The base (1) includes a division plate (11), a chamber (12) and a flow guiding pole (13). The division plate (11) divides the chamber (12) into a catchment portion and a heat exchanging portion (17). The flow guiding pole (13) communicates with both the catchment portion (16) and the heat exchanging portion (17). The passive impeller (3) is received in the chamber (12) and radially driven to rotate by the working fluid. The cold plate (4) is arranged correspondingly to the heat exchanging portion (17) and fastened to the base (1).

A method is provided of bonding together at least two parts. The method includes assembling together at least two parts and at least one adhesive layer, the adhesive being configured so that its adhesive power increases on heating as a result of it polymerizing, at least one of the parts being made of composite material or of metal, the adhesive layer being present, after assembly, between the parts, the assembled together parts and the adhesive being present in a chamber defined by a wall, the wall having an inside face situated facing a first part present between the adhesive layer and the wall, the first part being intended to be bonded to a second part and only a fraction of the second part being present inside the chamber; and applying a liquid against the wall on its side opposite from the chamber.

The invention discloses a vacuum gate valve for a mass spectrometer. The vacuum gate valve comprises a valve seat and a valve element, and a sealing ring is arranged between the valve seat and the valve element. The valve element is provided with a squeezing mechanism used for enabling the valve element to tightly press the sealing ring. The invention further discloses a mass spectrometry instrument, the mass spectrometry instrument comprises an ion source cavity and an analysis chamber which is communicated with the ion source cavity, and a communicated channel of the ion source cavity and the analysis chamber is provided with the vacuum gate valve. In addition, the invention discloses a method for establishing a high vacuum environment in mass spectrometry sample change. The method includes the steps that the communicated channel of the ion source cavity and the analysis chamber is closed through the vacuum gate valve, the ion source cavity is opened for changing samples, after the samples are changed, the ion source cavity is pre-vacuumized, the vacuum gate valve is opened so that the ion source cavity and the analysis chamfer can be communicated with each other, and vacuumizing is conducted. According to the devices and the method, the vacuum needed by detection of the mass spectrometer can be established quickly after the samples are changed, the sealing effect is good, and the sample changing efficiency is high.

A fluid pump apparatus includes a multi-chamber pump mechanism, with an actuator having a nozzle portion defining a nozzle chamber that has a controlled opening through a discharge valve, which is calibrated to open in response to a fluid pressure in the nozzle chamber exceeding the threshold pressure.

An evacuable flexible test chamber (10) for a leakage test of a test piece, having a wall (12) surrounding a test chamber volume (36), is characterized in that at least a portion of said wall is made up of two layers (18, 20) of wall material of which at least the layer (20) facing said test chamber volume (36) is made from a flexible material, and that between said two layers (18, 20) an overpressure as compared to the atmosphere surrounding said test chamber (10) is adapted to be created.

A foot and/or leg-exercising device (10) has a first sealed chamber (14) and a second sealed chamber (16) that are interconnected via one or more passageways (34). The chambers (14, 16) are of variable volume and fluid within one chamber may be pumped to the other chamber using the feet and/or legs. In one embodiment each foot is provided with a first chamber and a second chamber and fluid is pumped by a heel and toe rocking action of each foot. The chambers for both feet may be interconnected to allow pumping by an up and down action of the legs.