58results about How to "Avoid pressure difference" patented technology

A vent is mounted in a building wall so as to enable air exchange between the interior of the building and the outside environment. A first set of plural, spaced apart, air guide members and a second set of plural, spaced apart, air guide members are formed using elongate units each having a base element contiguous with opposing leg elements. The base elements of the first set of guide members are arranged in a first vertical plane, while the base elements of the second set of guide members are arranged in a second vertical plane, wherein the planes are in parallel horizontal mutual displacement. The leg elements of the two sets of air guide members are positioned and interlaced to force air flow moving through the apparatus is make a first right angle turn followed by a “Z” shaped turn and then a second right angle turn.

The method of operating a passive hybrid power supply in, or near, zero connected load conditions comprises the steps of: supplying a stream of substantially pure hydrogen to the anode of the fuel cell; supplying an stream of substantially pure oxygen to the cathode of the fuel cell; monitoring an electric current supplied by the storage battery; monitoring an output voltage shared by the fuel cell and the battery; evaluating a state of charge (SOC) of the battery based on the electric current and the output voltage; monitoring a hydrogen pressure in the fuel cell; monitoring an oxygen pressure in the fuel cell; limiting the stream of hydrogen and the stream of oxygen and actuating the hydrogen and oxygen recirculating pumps in such a way as to bring and maintain the hydrogen and oxygen pressures below 0.7 barabsolute while maintaining the hydrogen pressure between 70 and 130% of the oxygen pressure, in such a way as to ensure that the output voltage is maintained at a level corresponding to less than 0.90 volts / cell and does not exceed the maximum voltage limit of the battery.

The invention relates to a device (2) which includes a thermostatic element (10), as well as a stopper (20), which is axially movable relative to a stationary seat (5A) of a housing (3) so as to openand close a passage for the circulation of the fluid and which is connected to a body (11) of the thermostatic element so that, during the expansion of a thermodilatable material contained in said body, said body drives the stopper relative to the seat, a piston (12) of the thermostatic element, which is immersed in said thermodilatable material, being securely connected to the housing. In order for the integration of an outflow in the stopper to be economical, efficient and reliable, the stopper includes, as two separate parts: an insert (22) for receiving the body of the thermostatic element, which is provided with outflow means (22.5, 22.6), suitable for, regardless of the axial position of the stopper (20) relative to the housing (3), allowing the fluid to flow freely between the bodyof the thermostatic element and the inner surface of the insert and to pass through the insert in order to reach the outer surface thereof; and a sleeve (23) for lining the outside of the body of thethermostatic element, which is securely attached to the insert, surrounding the entire periphery of the body of the thermostatic element at a distance so as to define radially between said body of thethermostatic element and the sleeve a free space (V) for fluid circulation passing through the outflow means.

A bearing assembly including a bearing having a first ring with a hole, two front edges and an outer cylindrical surface, and a second ring with a hole, two radial edges and an outer cylindrical surface is provided. The first and second rings rotate relatively about a central axis. The bearing includes at least one row of rolling elements housed in a chamber formed between an outer cylindrical surface and a hole of the rings, the first and second rings and the rolling elements determining a pitch diameter of the bearing. A sealing means is provided having an engagement portion rigidly connected to one of the rings and a tapered annular body extending from the engagement portion towards the other ring. When idle, the body forms a non-zero angle with a plane perpendicular to the pitch diameter and is in direct or indirect contact with the other bearing ring.