Bypass Or Relief Valve Biased Open Patents (Class 137/115.06)
  • Patent number: 11906986
    Abstract: A counter pressure valve arrangement for controlling a pressure level of a hydraulic fluid in a return line from a hydraulic actuator arrangement. The counter pressure valve arrangement comprises a counter pressure valve having: a moveable valve member; a counter pressure regulating port configured for being connected to the hydraulic actuator arrangement via the return line; a tank port configured for being connected to a tank or low pressure reservoir for storing low pressure hydraulic fluid; and a pump port configured for being connected to a source of pressurised hydraulic fluid. A first position of the valve member effects fluid communication between the pump port and the counter pressure regulating port for supplying pressurised hydraulic fluid to the return line, and a second position of the valve member effects fluid communication between the counter pressure regulating port and the tank port for discharging hydraulic fluid from the return line to the tank.
    Type: Grant
    Filed: December 20, 2022
    Date of Patent: February 20, 2024
    Assignee: Parker Hannifin EMEA S.à.r.l.
    Inventors: Mahdi Bari, Nils Heinerud, Anders Karlsson, Bo Nilstam
  • Patent number: 11754192
    Abstract: A diaphragm valve, in particular for fluid media, has a valve body, a diaphragm and a valve drive, by the actuation of which the diaphragm can be acted upon. The valve body and the diaphragm are permanently connected to form a unit in that the diaphragm is clamped in a circumferential edge portion between the valve body and a counter piece and is riveted thereto. Further proposed is a method of manufacturing such a valve.
    Type: Grant
    Filed: May 11, 2022
    Date of Patent: September 12, 2023
    Inventors: Ralf Kettemann, Karl Geist
  • Patent number: 11725532
    Abstract: A valve for an air system in an aircraft engine, comprising: a housing defining a chamber having a valve axis circumscribed by a sealing surface; and a piston assembly within the chamber including: a sealing ring; and a body extending annularly about a piston axis collinear with the valve axis, having a first and a second piston surface axially spaced apart, a radially outer piston surface extending axially and located between the first and second piston surfaces, and an annular groove extending radially inwardly from the radially outer piston surface having first and second groove walls spaced apart and axially facing one another, the sealing ring within the annular groove, the body including: a first member defining the first piston surface and the first groove wall; and a second member defining the second piston surface and the second groove wall, the first member and the second member in mating engagement.
    Type: Grant
    Filed: May 30, 2022
    Date of Patent: August 15, 2023
    Assignee: PRATT & WHITNEY CANADA CORP.
    Inventors: Ahmed Abdelrahman, Michel Pitsikoulis
  • Patent number: 11541721
    Abstract: A vehicular heat management system includes a refrigerant circulation line configured to cool or heat a passenger compartment by generating a hot air or a cold air depending on a flow direction of a refrigerant, a cooling water circulation line configured to heat the passenger compartment with waste heat of an engine by allowing cooling water of the engine to circulate through a heater core, a refrigerant-cooling water heat exchanger disposed in the cooling water circulation line to allow the refrigerant and the cooling water to exchange heat, and an engine cooling water independent circulation unit configured to allow the cooling water passed through the engine to bypass the heater core and the refrigerant-cooling water heat exchanger.
    Type: Grant
    Filed: April 16, 2019
    Date of Patent: January 3, 2023
    Assignee: Hanon Systems
    Inventors: Doo Hoon Kim, Hyeon Gyu Kim, Kyung Ju An, Joong Man Han
  • Patent number: 11446681
    Abstract: A liquid dispensing valve for dispensing of liquid solution, the liquid dispensing valve operable to create a vacuum buildup of pressure, such that the liquid moves on a recirculation path from the intake port to the output port. The recirculation of the liquid prevents sediment within the liquid from settling, and further prevents backpressure, and allows for continuous recirculation of the solution through a suction return line, providing generally consistent flow of liquid. The liquid dispensing valve's ability to minimize sediment buildup allows for a quick cleaning of the lines while also minimizing potential contamination of the general area.
    Type: Grant
    Filed: June 24, 2019
    Date of Patent: September 20, 2022
    Inventors: Robert Dale Beggs, Kurt William Kamin
  • Patent number: 11339807
    Abstract: A throttle check valve includes: a poppet valve body that has an orifice formed at one end and has a hole portion formed at a side portion; a plug that has a tubular shape to surround the poppet valve body, and functions as a valve seat to come into contact with the poppet valve body; and a spring that biases the poppet valve body and the plug functioning as the valve seat in directions to come into contact with each other. When the spool is at the second position, the plug forming the distal end portion of the spool and the plug arranged in the housing come into contact with each other. The plug is provided with a protruding portion that comes into contact with the poppet valve body.
    Type: Grant
    Filed: May 10, 2018
    Date of Patent: May 24, 2022
    Assignee: SHIMADZU CORPORATION
    Inventor: Shogo Sonokawa
  • Patent number: 11079026
    Abstract: The present disclosure provides a valve for a respiratory bypass conduit, the valve further comprised of an inner frame that provides rigidity to a flexible outer seal. The inner frame has guiding flanges to guide the valve within he conduit, and a hinge portion to be secured within a slot of the conduit. Together, the hinge and the guiding flanged help the valve move from a first position to a second position. The present disclosure also provides for a method of assembling the valve for respiratory bypass conduit, whereby the inner frame is aligned with and inserted into the outer seal until a peripheral gap of the outer seal substantially houses the inner frame and an inner periphery of the inner frame surrounds a recessed portion of the outer seal to secure the outer seal in the correct orientation relative to the inner frame.
    Type: Grant
    Filed: July 5, 2019
    Date of Patent: August 3, 2021
    Inventor: Francesco Fiorenza
  • Patent number: 11027775
    Abstract: The operability can be improved when the rotational speed of the engine is low and the working device actuator and the steering actuator are operated in a combined manner, while the configuration of prioritizing the operation of the steering actuator is maintained. A control device (70) included in a wheel loader (1) determines whether a working device (4) is in load lifting operation or not based on the pressure that is between a working device directional switching valve (44) and an orifice (45) and is detected by a pressure sensor (71), and reduces the opening area of a steering control valve (37) when determining that the rotational speed of an engine (14) detected by a rotational speed sensor (72) is equal to or less than a predetermined threshold (Ns) and a working device is in the load lifting operation.
    Type: Grant
    Filed: March 5, 2019
    Date of Patent: June 8, 2021
    Assignee: HITACHI CONSTRUCTION MACHINERY CO., LTD.
    Inventors: Shinichiro Tanaka, Hiroyasu Kodera
  • Patent number: 10012318
    Abstract: A shuttle valve has a valve body including a first valve seat defining a first fluid inlet, a second valve seat defining a second fluid inlet, and a center portion that is connected to the valve seats, the center portion defining a fluid outlet and a bore. A moveable member is moveable within the bore between a first position against the first valve seat and a second position against the second valve seat to control the flow of fluid from either of the first or second inlet to the outlet. The moveable member may be configured to have a unitary construction formed of a single component, by which a unitary shell defines a substantially hollow interior. The moveable member has a hollow interior and a weep hole for equalizing pressure between the hollow interior and exterior of the moveable member.
    Type: Grant
    Filed: March 21, 2016
    Date of Patent: July 3, 2018
    Assignee: Parker-Hannifin Corporation
    Inventors: Aaron Michael Morgan, Kevin Lawrence Bresnahan, Tyler James Kooser
  • Patent number: 9291173
    Abstract: A pump motor of a hydraulic hybrid system also serves as a pump to supply hydraulic oil or lubricating oil to a power train, thus enabling elimination of an oil pump provided in the power train and hence reductions in the number of parts and cost, and, in addition, an existing oil pan provided in the power train and the like are utilized for the hydraulic hybrid system, which in turn enables achieving further reductions in the number of parts and cost. Moreover, when idle-reduction control is performed on an engine, during engine's stopped conditions, the pump motor can be driven as a motor by hydraulic pressure accumulated in an accumulator to start the engine and supply the hydraulic pressure to a transmission, thus eliminating a need to provide a motor-driven oil pump for the idle-reduction control and hence enabling a further reduction in cost.
    Type: Grant
    Filed: March 6, 2013
    Date of Patent: March 22, 2016
    Assignee: Honda Motor Co., Ltd.
    Inventors: Seiichiro Ishikawa, Yasunari Kimura, Masashi Kato, Daiki Sato, Yuki Shibahata
  • Patent number: 9271441
    Abstract: A material spreader having a beater bar that meters the supply of small quantities of material to the discharge opening of a material spreader hopper eliminating the need for a gate. The beater bar has one and preferably several paddles that rotate adjacent the discharge opening and as the paddle passes the opening, discharges only the amount of material on the paddle. The material spreader uses a high ratio transmission and low rpm motor to allow for extremely slow rotation of the beater bar. The motor speed can be controlled to allow very slow rotation and very small amounts of material to be discharged from the hopper. The spreader does not require a gate. The discharge of material is metered electronically.
    Type: Grant
    Filed: June 20, 2014
    Date of Patent: March 1, 2016
    Assignee: Douglas Dynamics, L.L.C.
    Inventors: Charles Truan, Barry Truan
  • Patent number: 8973598
    Abstract: A priming valve device for a beverage machine. The device includes a casing assembly including a water inlet, a water outlet, and a drain and venting portion for discharging water or air during priming and a valve assembly associated with the casing assembly. The valve assembly includes a valve member which is moveable to a closed position which closes the water outlet by elastic return when the pressure in the water inlet decreases under the elastic return pressure of the valve member.
    Type: Grant
    Filed: November 27, 2006
    Date of Patent: March 10, 2015
    Assignee: Nestec S.A.
    Inventors: Stefan Etter, Sandro Zingg
  • Patent number: 8739811
    Abstract: A direct metering fuel supply system includes a fuel pump, a burn flow fuel line, a servo flow fuel line, and a servo regulator. The fuel pump is adapted receive pump commands representative of a commanded fuel flow rate and is configured, in response to the pump commands, to discharge fuel at the commanded fuel flow rate. The burn flow fuel line is in fluid communication with the pump to receive a first portion of the fuel discharged therefrom. The servo flow fuel line is in fluid communication with the pump to receive a second portion of the fuel discharged therefrom. The servo regulator is mounted on the servo flow fuel line and configured to maintain fuel flow rate in the servo flow fuel line at a substantially constant fuel flow rate regardless of fuel flow rate in the burn flow fuel line.
    Type: Grant
    Filed: February 7, 2011
    Date of Patent: June 3, 2014
    Assignee: Honeywell International Inc.
    Inventors: Paul Futa, David Tuttle, William Scott Rowan
  • Publication number: 20140020663
    Abstract: A valve assembly is disclosed for controlling fluid flow between two reservoirs. The valve assembly includes a relief valve arranged inside the housing and configured to open a first fluid flow path when the first reservoir is above a first predetermined pressure value.
    Type: Application
    Filed: September 24, 2013
    Publication date: January 23, 2014
    Applicant: Eaton Corporation
    Inventors: Daniel Lee Pifer, Vaughn Mills, Ronald Sexton
  • Patent number: 8517148
    Abstract: A lubrication system includes an auxiliary lubricant tank 48, a supply conduit 58 extending from a source of lubricant 26 to the auxiliary lubricant tank. A reduced-G bypass line 108 branches from the conduit and enters the auxiliary tank at a first elevation E1. The system also includes an auxiliary tank discharge conduit 116, a portion of which resides within the tank. The resident portion has an opening 122 at least partially at a second elevation E2 higher than the first elevation.
    Type: Grant
    Filed: December 14, 2011
    Date of Patent: August 27, 2013
    Assignee: United Techologies Corporation
    Inventors: Lawrence E. Portlock, Michael E. McCune, Louis J. Dobek
  • Patent number: 8439069
    Abstract: A valve assembly is provided that is suitable for use as an air release valve. The valve mechanism is actuated by liquid forced through an orifice by a diaphragm under pressure from the main discharge and is less prone to valve chatter under varying pressure conditions. The use of an externally adjustable orifice and/or regulator allows the valve assembly to operate satisfactorily in a wide range of pressures. The mode of operation of the valve mechanism is externally visible.
    Type: Grant
    Filed: January 12, 2007
    Date of Patent: May 14, 2013
    Assignee: The Gorman-Rupp Company
    Inventor: Tommy William Yeater
  • Patent number: 8215330
    Abstract: An adjustable automatic recirculation valve includes a valve body, a main valve disk, a bypass valve and a dynamic adjustment assembly. The main valve disk is positioned within the valve body and opens in response to fluid flow between a main inlet and a main outlet. The bypass valve controls the flow of fluid between the main inlet and the recirculating outlet. A dynamic adjustment assembly, housed within the valve body controls the operating lift associated with the maximum opening of the bypass valve to regulate fluid flow capacity to the recirculating outlet.
    Type: Grant
    Filed: January 19, 2010
    Date of Patent: July 10, 2012
    Assignee: Tyco Valves & Controls, LP
    Inventors: Michael D. McNeely, Howell A. Smith
  • Patent number: 6857444
    Abstract: The invention recites an unloader valve operable to direct a flow of fluid. The valve includes a housing having a bypass opening, an inlet opening, an outlet opening and an internal chamber between the inlet opening and the outlet opening. A shuttle valve is disposed within the internal chamber and is movable between a first position wherein the flow of fluid is substantially directed to the bypass opening and a second position wherein the flow of fluid is directed to the outlet opening. The shuttle valve includes an internal flow path having a venturi therein. A biasing member biases the shuttle valve in the first position.
    Type: Grant
    Filed: October 25, 2002
    Date of Patent: February 22, 2005
    Assignee: Briggs & Stratton Power Products Group, LLC
    Inventor: Greg Davis
  • Patent number: 6739853
    Abstract: An axial slide valve is provided with an axially extending fluid chamber at each end with one chamber receiving a spring and being acted on by suction pressure and the other chamber coacting with a fixed piston and being acted upon by discharge pressure or the like whereby the slide valve is positioned so as to balance the spring and fluid pressures and thereby the compressor capacity.
    Type: Grant
    Filed: December 5, 2002
    Date of Patent: May 25, 2004
    Assignee: Carrier Corporation
    Inventors: Yan Tang, Bruce A. Fraser
  • Patent number: 6415809
    Abstract: A fluidic valve assembly having a fluidic valve mechanism similar to the mechanisms in U.S. Pat. Nos. 5,003,780 and 5,348,040 provided with improved valve positioning devices which provide improvements in providing the force to move the valve members, and in positioning fluidic valve members in their valve chambers so that the valve members open and close a chamber port, depending upon the direction of fluid flow through the valve chamber.
    Type: Grant
    Filed: June 22, 2000
    Date of Patent: July 9, 2002
    Inventors: Ronald Louis Shellhause, Doonan Dwight McGraw
  • Publication number: 20020066482
    Abstract: A safety device (1) for a fluid transmission has a diaphragm (4) which is arranged deflectably in a feed passage (8) and which has at least one through opening (2) for the fluid. A return passage (10) for the fluid from the chamber of the consumer (9) is of such a configuration and arrangement that it can be opened and closed by deflection of the diaphragm (4), wherein the diaphragm (4) is of such a configuration that, when the fluid flow in the feed passage (8) falls below a given value, the return passage (10) is opened. The pressure in a pressure chamber (9) of a consumer can be let off by the device (1) when a pump (7) is no longer conveying.
    Type: Application
    Filed: July 30, 2001
    Publication date: June 6, 2002
    Applicant: Siemens Building Technologies AG
    Inventor: Giuseppe Pulli
  • Patent number: 6334458
    Abstract: The invention relates to the sector of pressure-washing machines, in the form of a valve with by-pass function when the gun is closed, and allows reduction of the pressure inside the delivery duct during operation in by-pass mode. In particular this valve comprises an external housing (1) defining a chamber (2) provided with an inlet section (3), an outlet section (4) and a discharge section (5). It also comprises means (6) for shutting off the discharge section (5) or the outlet section (4), which are located inside the chamber (2) and actuated in a reciprocating manner by a difference in pressure and by resilient means (7) and provided with means (8) for communication between the inlet section (3) and the outlet section (5) operating during discharge of the flow through the discharge section (5).
    Type: Grant
    Filed: December 15, 1999
    Date of Patent: January 1, 2002
    Assignee: Arrow Line S.r.l.
    Inventor: Roberto Amaduzzi
  • Patent number: 6328535
    Abstract: A flow control valve has body (20) containing a “bucket” shaped valve element (1) that moves in a bore (2). The valve element (1) has a discharge orifice (8) through which a needle valve (9) projects. Movement of the valve element (1) within the bore (2) adjusts the annular clearance between the orifice (8) and the needle (9) thereby varying the pressure drop across the valve element (1) and the rate of the main flow through the valve. The inlet (4a) to the body (20) is located upstream of the valve element. With this arrangement, the spill flow rate is adjusted by movement of the valve element (1) within the bore (2). However, in all cases the main flow of fluid passes through the orifice (8) of the valve element (1) through the bore (2) to the outlet (10), thereby avoiding the formation of stagnant “pools” of fluid within the bore (2) of the flow control valve.
    Type: Grant
    Filed: July 6, 1999
    Date of Patent: December 11, 2001
    Assignee: Hobourn Automative Limited
    Inventors: Derek Brighton, Alec Thornelow