171results about How to "Prevent drainage" patented technology

Featured are devices for delivering a treatment medium to an eye as well as methods related thereto. Such devices and methods allow a desired amount of the treatment medium to be delivered in a controllable manner over a predetermined time period. In particular embodiments, the delivery device is configured and arranged so the treatment medium is eluted from one portion of the delivery device and so that another portion thereof is removably secured within a natural opening or orifice in or proximal to the eye. In specific embodiments the another portion is configured and arranged so as to be removably secured within the natural opening comprising at least one punctum of an eye.

A method for forming through-wafer interconnects (TWI) in a substrate. Blind holes are formed from a surface, sidewalls thereof passivated and coated with a conductive material. A vent hole is then formed from the opposite surface to intersect the blind hole. The blind hole is solder filled, followed by back thinning of the vent hole portion of the wafer to a final substrate thickness to expose the solder and conductive material at both the active surface and the thinned back side. A metal layer having a glass transition temperature greater than that of the solder may be plated to form a dam structure covering one or both ends of the TWI. Intermediate structures of semiconductor devices, semiconductor devices and systems are also disclosed.

A cartridge based water purification and filtration system which permits cartridge changes without drainage at the input and output ports. Interlocking flanges at the manifold and cartridge lock the cartridge to the manifold and raised surfaces at the cartridge operate the inlet valve with a rotational seating of the cartridge. A spring biased inlet valve depends from a supply manifold input port and cooperates with the filter cartridge to prevent forward flow until the cartridge is seated to the manifold. The check valve includes a split stem which prevents chatter with valve operation. A check valve at the output port cooperates with a sealed bayonet fitting that mates to a concentric outlet port at the cartridge to prevent back flow with cartridge removal.

Provided is a hydraulic time release system for regulating the flow of liquid therethrough. The time release system comprises a timer body having a timer inlet for providing liquid at a timer inlet flow rate and a timer outlet for discharging liquid at a timer outlet flow rate. The timer body is divided into a first reservoir, a second reservoir, a third reservoir and a float reservoir. The first reservoir includes a catch pan mounted on an open drain tube that is positioned below the timer inlet. The first, second and third reservoirs are in at least partial fluid communication with the float reservoir. A timer float assembly is moveable between open and closed positions in response to variations in the float reservoir liquid level. The closed position is such that the flow of liquid into the drain tube is blocked causing the timer body to fill with liquid whereupon the timer outlet flow rate is substantially equivalent to the timer inlet flow rate.

A bearing lubrication (oil circulation) system having a check valve configuration for preventing overflow of an oil reservoir or tank. The pressurized oil circulation system may comprise a pump that pressurizes oil from the tank and circulates the oil through a supply conduit to a bearing, and returns the oil to the tank through a return conduit. The system may include a check valve disposed in the supply conduit and a pilot-operated check valve disposed in the return conduit. The pilot may be taken from the supply conduit upstream of the check valve disposed on the supply conduit. When pressure is discharged from the oil circulation, such as with shutdown of a circulation pump, the check valves automatically close and thus prevent oil contained in the supply and return conduits from draining (i.e., by gravity) to the oil tank. Therefore, flooding of the oil tank with excessive oil is prevented. Furthermore, loss of oil from the bearing sump is also prevented.

The invention belongs to the technical field of municipal construction, and particularly relates to a road drainage device. The device comprises a rainwater grate, strip-shaped water inlets are formedin the rainwater grate, a shell body is connected with the lower surface of the rainwater grate, a poking mechanism and a first power mechanism are installed in the shell body, and a second power mechanism is installed at the lower end of the poking mechanism. The invention further discloses a using method of the road drainage device. According to the method and the device, power of rainwater canbe used to start or stop the operation of the poking mechanism, when the amount of rainwater is larger, debris such as leaves covering the water inlets of the rainwater grate can be poked by the poking mechanism to achieve the purposes of preventing the water inlets from being blocked and drainage. The device has the advantages of energy saving, good drainage effect, high safety performance and the like.

Provided is a hydraulic time release system for regulating the flow of liquid therethrough. The time release system comprises a timer body having a timer inlet for providing liquid at a timer inlet flow rate and a timer outlet for discharging liquid at a timer outlet flow rate. The timer body is divided into a first reservoir, a second reservoir, a third reservoir and a float reservoir. The first reservoir includes a catch pan mounted on an open drain tube that is positioned below the timer inlet. The first, second and third reservoirs are in at least partial fluid communication with the float reservoir. A timer float assembly is moveable between open and closed positions in response to variations in the float reservoir liquid level. The closed position is such that the flow of liquid into the drain tube is blocked causing the timer body to fill with liquid whereupon the timer outlet flow rate is substantially equivalent to the timer inlet flow rate.

In a fuel injector circuit for a gas turbine engine, a fuel staging valve assembly for distributing fuel into multiple zones in the combustor, the staging valve assembly, including a pilot valve operatively interconnected with at least one main valve, having high pressure and no leak capabilities, which are used to open, close and modulate the mass flow rate volume of fuel within the fuel injection circuit, with the position of the normally-closed valve being controlled by the pressure difference between the nozzle fuel supply circuit and a separately supplied signal circuit. As long as the desired pressure differential is maintained, fuel flow may be modulated without affecting the position of the valve, with the valve seats and valve seals being so configured as to prevent fuel leakage into the downstream nozzle circuit under these conditions.

A cutting and fillet board with drain is adapted for removable attachment to a conventional IGLOO(R) ice chest cooler and other similar ice chest coolers. The cutting and fillet board has a planar, generally rectangular board member fabricated of a high-density polymer and includes a raised peripheral wall. The board member has a generally smooth filleting surface designed for use during cutting, cleaning, and filleting fish. An attachment means facilitates removable attachment of the board member to an upper surface of an ice chest cooler top. A pair of drainage portals facilitate drainage from the filleting surface, while drain plugs serve to prevent drainage onto the ice chest cooler top. A cutting instrument retention means provides for temporary storage of a desired cutting instrument.

The invention relates to a gas well automatic water draining plunger. The gas well automatic water draining plunger comprises a plunger barrel with a through hole formed in the axial direction. The plunger barrel is internally provided with a control mechanism partitioning the through hole into an upper cavity and a lower cavity. The plunger barrel at least comprises a first barrel unit and a second barrel unit, and the outer diameter of the first barrel unit is greater than that of the second barrel unit. The first barrel unit and the second barrel unit are internally provided with limiting grooves. The second barrel unit is provided with a bypass channel which can communicate with the through hole in the radial direction of the limiting groove. The control mechanism is provided with an elastic sensitive element capable of converting differential pressure between the upper cavity and the lower cavity into axial displacement, and an actuating element which is connected with the elastic sensitive element and is capable of sliding back and forth along the limiting groove under the action of the elastic sensitive element so as to open / close the bypass channel. The plunger can control the bypass channel to open / close through the elastic sensitive element according to changes of the well bottom dropsy degree while achieving non-shut-in continuous production, automatic liquid draining is achieved, and the liquid draining frequency is controlled to be the optimal level.

A stable foam of a liquid matrix, gas bubbles and a structuring agent that forms a lamellar or vesicular cage structure without generating a gel imparting a rubbery texture to the foam. The lamellar cage structure entraps at least a substantial portion of the gas bubbles and liquid matrix therein to retain and stabilize the gas bubbles and liquid in a sufficiently compact structure that substantially prevents drainage of the liquid matrix as well as coalescence and creaming of the gas bubbles to maintain stability of the foam even when the foam is subjected to multiple heat shocks.

An auxiliary power device for attachment to an existing refrigeration unit of a refrigerated trailer to serve as a power source to a truck cab, thereby allow operation of electrical devices in said cab without idling of the truck's engine. The auxiliary power device comprises a housing attached beneath the existing refrigeration unit, an electric generator enclosed within the housing, and a pulley assembly mounted in the housing and connected by drive shaft to the generator. The pulley assembly is connected via drive belt to the diesel motor in the existing refrigeration unit. When the generator is activated a first relay governs the speed of the diesel motor in the refrigeration unit, which turns the generator to generate power, and a second relay prevents drainage of the refrigeration unit battery. The power from the generator is routed through a breaker panel mounted in the cab of the truck for distributing and regulating power from the battery and / or generator into the truck cab. Thus, the driver can power electric devices in the cab from the auxiliary power generation device without idling the truck's main engine, thereby reducing fuel consumption, harmful emissions, and prolonging engine life.

A low calorie, low fat food product of a foodstuff and a stable foam. The foam has a liquid matrix, gas bubbles and a structuring agent that forms a lamellar or vesicle cage structure without generating a gel imparting a rubbery texture. The lamellar / vesicular cage structure entraps a substantial portion of the bubbles and liquid matrix therein in a sufficiently compact structure that substantially prevents drainage of the liquid matrix and coalescence and creaming of the bubbles to maintain stability of the foam even when the foam is subjected to heat shock. The food product contains less than 0.5 grams of fat, and provides a caloric density of less than 200 kcal per each 100 ml serving of gas bubble-free liquid matrix.