An integrated pressure regulator is provided with three stages configured to reduce an extreme tank pressure down to a typical working pressure. The regulator is configured to supply a steady working pressure until the tank pressure is reduced to little more than the working pressure itself. Stages of the pressure regulator are integrated into a body and arranged to minimize regulator mass and volume. A thermally-triggered pressure relief device may be included with a triggering time adapted to enhance the safety of smaller cylinders that may be used, e.g., in aerial applications.

An oil pressure supply device supplies, to an oil chamber, an oil pressure generated by suctioning oil from an oil source with an oil pump. The oil pressure supply device includes a first oil passage connected to a suction side of the oil pump; a first check valve provided in the first oil passage and configured to close the first oil passage and prevent oil from moving to the oil source side when the oil pump is stopped; a second oil passage connected to a discharge side of the oil pump; and a second check valve provided in the second oil passage and configured to close the second oil passage and prevent oil from moving to the oil pump side when the oil pump is stopped. When the oil pump is stopped, the second check valve closes the second oil passage earlier than the first check valve closes the first oil passage.

Methods of using vapor cells may involve providing a vapor cell including a body defining a cavity within the body. At least a portion of at least one surface of the vapor cell within the cavity may include at least one pore having an average dimension of about 500 microns or less, as measured in a direction parallel to the at least one surface. A vapor pressure of a subject material within the cavity may be controlled utilizing the at least one pore by inducing an exposed surface of a subject material in a liquid state within the at least one pore to have a shape different than a shape the exposed surface of the subject material in a liquid state would have on a flat, nonporous surface.

Methods of using vapor cells may involve providing a vapor cell including a body defining a cavity within the body. At least a portion of at least one surface of the vapor cell within the cavity may include at least one pore having an average dimension of about 500 microns or less, as measured in a direction parallel to the at least one surface. A vapor pressure of a subject material within the cavity may be controlled utilizing the at least one pore by inducing an exposed surface of a subject material in a liquid state within the at least one pore to have a shape different than a shape the exposed surface of the subject material in a liquid state would have on a flat, nonporous surface.

The present invention relates to a pressure stabilizer (14) comprising a constant pressure chamber (10) to which 3 pipes are attached, namely an outlet pipe (13), located downstream of the pressure stabilizer (14), an inlet pipe (11) and a return pipe (12), both placed upstream of the pressure stabilizer (14). The pressure stabilizer (14) prevents hydraulic shocks, which can potentially damage hydraulic installations. The devices described in the state of the art do not allow to stabilize efficiently spiky pressure fluctuations by means of simple hydraulic systems. The present invention by means of the combined operation of a pressure reducing valve (2) and a relief valve (3), will eliminate the pressure peaks at the inlet of hydraulic installations.

An assembly for an ATIS that includes a tire inflation valve and a tire deflation valve, and further includes a safety valve that is configured to receive the tire pressure, deflate a tire when tire pressure is too high such as due to braking heat, road friction, ambient temperature, or other reasons. The safety valve prevents deflation of the tire through the deflation valve in the case of low source pressure, such as the pressure source fails or a leak in the source pressure system lines. The assembly is designed to be quickly serviced in the field, where the serviceable parts are very inexpensive. Multiple devices can be installed in parallel with the others, with one device per tire or tire set. The assembly can be a block configured to be attached to a hub cap of a vehicle. It also enables a sensor placement on the hub cap for hub temperature sensing as well as tire pressures sensing and reporting.

Embodiments described herein relate to a pressure-regulating device, systems that include the device, and related methods. For example, the pressure-regulating device may receive gas from a gas supply at a first pressure (e.g., on a supply side of the pressure-regulating device) and may regulate or reduce the pressure of the received gas to a selected or suitable second, different pressure.

There is provided an attachment device for maintaining positive fluid pressure, the attachment device comprising a body having a fluid outlet port and at least two positive pressure fluid inlet ports; wherein each of the at least two positive pressure fluid inlet ports is connectable to a respective fluid source; wherein each of the at least two positive pressure fluid inlet ports is in fluid communication with the fluid outlet port; wherein each of the at least two positive pressure fluid inlet ports comprises an attachment device mechanism for selectively starting and stopping a flow of fluid from the respective fluid source to the fluid outlet port, and wherein the attachment device mechanism comprises a valve moveable between an open valve position and a closed valve position. An attachment device, connector, and method of using an apparatus suitable for a ventilator is also disclosed.

There is provided an attachment device for maintaining positive fluid pressure, the attachment device comprising a body having a fluid outlet port and at least two positive pressure fluid inlet ports; wherein each of the at least two positive pressure fluid inlet ports is connectable to a respective fluid source; wherein each of the at least two positive pressure fluid inlet ports is in fluid communication with the fluid outlet port; wherein each of the at least two positive pressure fluid inlet ports comprises an attachment device mechanism for selectively starting and stopping a flow of fluid from the respective fluid source to the fluid outlet port, and wherein the attachment device mechanism comprises a valve moveable between an open valve position and a closed valve position. An attachment device, connector, and method of using an apparatus suitable for a ventilator is also disclosed.

A combination check and relief valve assembly especially designed as a manifold attachment to the exhaust port of a blower and which adapts to the blower's exhaust to maintain pressure within the manifold to a certain range. The combination valve features a manifold having an inner channel which connects to the discharge port of the blower via an inlet port, a check valve assembly having a spring-loaded ball disposed for periodic operative engagement with the inlet port for the prevention of backflow of the fluid discharge and a relief valve assembly mounted in a side channel of the manifold for releasing and venting the fluid discharge through a relief vent port upon an excessive pressure buildup. The relief valve includes a spring-loaded plunger which opens and closes the relief vent port. The combined effect of the two valves helps to maintain the pressure in the manifold to a set adjustable desired range.