| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 137493000 | Bi-directional flow valves | 14 |
| 20080223456 | HYDRAULIC VALVE ARRANGEMENT - The invention concerns a hydraulic valve arrangement ( | 09-18-2008 |
| 20080223457 | Bi-directional valve - A bi-directional valve having a housing with at least one internal gasket contact surface. A spring holds the plate, flapper and gasket against the internal gasket contact surface of the housing. When a predetermined pressure acts on the plate and flapper, the plate, flapper and gasket move away from the gasket contact surface to allow flow through the bi-directional valve in a first direction. To flow in the opposite direction the plate and gasket abut against the housing and the flapper opens to allow flow in an opposite direction. The same flow path is used for flow in either direction through the bi-directional valve. | 09-18-2008 |
| 20080251138 | Fuel Volatilizing Control System of Fuel Tank - An fuel volatilizing control system for a fuel tank, includes a fuel cover engaged to a fuel entrance of the fuel tank, a closure body arranged under the fuel cover and in the fuel entrance, a filter room containing filtering materials in the closure body and a double-lane valve comprising a first valve member and a second valve member. The first valve member and the second valve member can control whether the fuel gas flows to the environment or the outside air flows to the fuel tank. | 10-16-2008 |
| 20080251139 | Fuel Tank having Functions of Adjusting Press Produced by Fuel Volatilizing and Preventing Fuel Overflowing - A fuel tank includes a canister and a fuel control valve arranged in an expanding room. The canister has two guiding pipes communicated respectively with an entrance of an engine and environment. The fuel control valve is communicated with the expanding room. A double-lane valve is arranged between the canister and the fuel control valve. The double-lane valve has an entrance communicated with the fuel control valve, an exit communicated with the canister, a first valve and a second valve arranged between the entrance and the exit. The second valve withstands a spring and is arranged on the first valve. The first valve can detect an expending press produced by volatilized fuel gas to control whether the fuel gas enter into the entrance of the engine. The second valve can detects a vacuum press of the fuel tank to control whether air enter into the fuel tank. | 10-16-2008 |
| 20090090418 | CHECK VALVE WITH FLUID HAMMER RELIEF AND MONITORING FEATURES - The present invention relates to an apparatus and method for improved check valve technology used in flow meters, particularly compound/combo meters. The improved check valve technology may comprise a single piece module that (1) can easily be removed from the check valve chamber without disturbing the metering module, (2) comprises a seal as part of the check valve assembly simplifying seal inspection, seal removal and seal replacement; (3) is secured in its housing only external fasteners; and (4) comprises fluid hammer suppression and monitoring features. | 04-09-2009 |
| 20100108159 | SEWER OVERFLOW RELIEF DEVICE - A sewer overflow relief device for mounting at a top end of a sewer overflow relief pipe includes a top cover having at least one outside air intake and an air flow control mechanism for controlling the flow of outside air into the sewer overflow relief pipe. In use, the device prevents outside water from entering the sewer and the device may be ejected from the sewer overflow relief pipe by sewage pressure pushing against the device, thereby allowing the sewer overflow relief pipe to overflow. | 05-06-2010 |
| 20150034180 | TANK PRESSURE CONTROL SOLENOID WITH PASSIVE TANK VACUUM RELIEF - A tank pressure control valve which provides for both controlled and passive vacuum relief functions with an additional component in a tank purge valve. The tank pressure control valve includes a second valve in addition to a purge valve to create a small sealing area on one side that opens easily against the tank pressure with the normal magnetic forces in a purge valve. The second valve is a sealing disk, which has an aperture to allow for the flow of purge vapor. One side of the disk has sealing on a larger area so the small vacuum forces open the valve against the spring force biasing the valve to a closed position. The design of the second valve uses a disk to provide precise flow control and passive vacuum relief. | 02-05-2015 |
| 20150377371 | Intelligent Pressure Relief Device For A Double Isolation Valve - A pressure relief device for a double isolation valve comprises a body with a valve cavity. The valve body has a pocket formed therein. A disc is disposed in the central section of the pocket. The disc is interposed between two spring-actuated seats. Each of the seats is in fluid communication with opposing valve sides. The pocket central section is in fluid communication with the valve body cavity. Each of the seats is provided with two different types of gaskets in series. In operation, reverse pressure causes retraction of the seats, thereby relieving valve body cavity overpressure. | 12-31-2015 |
| 20160097462 | HYDRAULIC VALVE - A hydraulic valve includes a biasing member for generating a biasing force to press a valve seat and a valve member. When a second hydraulic chamber has higher hydraulic pressure than a first hydraulic chamber, a hydraulic pressure difference between the first and second hydraulic chambers acts on the valve seat to separate the valve seat from the valve member against the biasing force of the biasing member so that the first hydraulic chamber and the second hydraulic chamber come into fluidal communication. | 04-07-2016 |
| 137493100 | One head and seat carried by head of another | 2 |
| 137493200 | Supporting valve only spring biased | 1 |
| 20090014071 | Mud saver valve with magnetic latching - A mud saver valve for retaining drilling fluid in the Kelly of a rotary drilling rig for insertion into a Kelly sub with an enlarged opening inside having a valve and hollow piston closing the flow in a first position and having flow through when the hollow piston is moved by flow against a spring to an open position compressing a spring to stack height, the spring being magnetized to provide magnetic latching to assist in holding the hollow piston in the open position at flow rates lower than it would otherwise be held open. | 01-15-2009 |
| 137493600 | Both valves spring biased | 1 |
| 20140216573 | CHECK VALVE - A check valve includes a casing including a positive pressure valve seat, a positive pressure valve urged by a positive pressure valve spring and including a negative pressure valve seat, and a negative pressure valve assembled to the positive pressure valve and urged by a negative pressure valve spring, where the positive pressure valve includes an inner cylinder, an outer cylinder that is connected with an outer circumference of the inner cylinder via ribs, and passages formed between the inner cylinder and the outer cylinder, where the positive pressure valve spring is disposed the casing and the outer cylinder, and where the negative pressure valve spring is disposed in the inner cylinder. | 08-07-2014 |
| 137493800 | Axes of ports parallel | 3 |
| 20120080102 | Reversible Flow Valve Assembly - A valve is provided that comprises a valve chamber including first and second valve port openings in communication with first and second inlet/outlets, respectively. A shaft is rotatably disposed in the valve chamber. A first valve plate is rotatably coupled to the shaft that is disposed in the valve chamber over the first valve port opening. The first valve plate has a first opening positioned so as to align with the first valve port opening. The first valve plate is configured to rotate from its closed position covering the first valve port opening to an open position, where rotation of the first valve plate adjustably positions at least a portion of the first opening over the first valve port opening. A second valve plate is configured to rotate with the first valve plate, and to cover the second valve port opening. | 04-05-2012 |
| 20160195317 | AN EXPANSION VALVE COMPRISING A STOP ELEMENT | 07-07-2016 |
| 20170234442 | Intelligent Pressure Relief Device For A Double Isolation Valve | 08-17-2017 |
