Patents Examined by Martin P. Schwadron
  • Patent number: 5425396
    Abstract: A fluid pressure variation valve for use in pressurized fluid systems situated in a pressurized fluid line, for the purpose of reducing the pressure in the fluid line when fluid is not in use, while allowing the normal high fluid pressure of the pressurized fluid system to be maintained when fluid is in use. The valve unit comprises a hollow housing where a valve is moveably situated. A diaphragm is attached to the valve. Two relief valves are disposed in the hollow housing. A first relief valve provides selective communication between the inlet and outlet of the valve housing. In the closed position, the valve defines a first chamber at the inlet of the valve body. A second chamber is defined between the outlet of the valve housing and the second relief valve. A third chamber is defined between the diaphragm and a passage connecting the second relief valve. The third chamber allows selective communication with the outlet via the second relief valve.
    Type: Grant
    Filed: July 2, 1993
    Date of Patent: June 20, 1995
    Inventor: Josef Wodeslavsky
  • Patent number: 5423375
    Abstract: A CPU heat sink mounting structure including a CPU, a heat sink attached to one side of the CPU to hold an electric fan for dissipating heat from the CPU, and a plurality of clamps fastened to the heat sink to hold down the CPU, each clamp having a forked mounting portion fastened to a respective retaining hole on the heat sink and a clamping portion clamped on the CPU to hold down the CPU on the heat sink.
    Type: Grant
    Filed: October 6, 1994
    Date of Patent: June 13, 1995
    Inventor: Ming D. Chiou
  • Patent number: 5421360
    Abstract: A vertically oriented float assisted automatic driptrap mechanism having a float valve chamber defined by a body section and base is disclosed. A float is located for vertical liquid level responsive movement within the float valve chamber and reciprocates within a valve stem float guide. A diffuser is provided at the inlet of the chamber to prevent impingement of incoming fluid on the float. The valve stem guide also serves as a filter support for a filter which filters out contaminants that might interfere with the valving action of the driptrap mechanism. A valve seat having a tapered seat surface and a self-positioning valve plug movably supported by the valve stem and having a differently tapered sealing surface establish line contact sealing to ensure effective valve operation under high pressure conditions.
    Type: Grant
    Filed: May 7, 1993
    Date of Patent: June 6, 1995
    Assignee: Groth Corporation
    Inventors: Louis R. Castaneda, Milton N. Anderson, Jr.
  • Patent number: 5419359
    Abstract: A valve device for use with a drain provided with a pipe having an entrance for collecting liquid leading to a P-trap beneath the entrance. The device comprising an open vessel, in use positioned at the entrance of the pipe, having walls and a floor defining an internal chamber, the floor having an opening for permitting liquid collected in the chamber to pass into the pipe. The device is provided with a valve arranged to seat in the opening from below and is movable between a closed position sealing the opening against gas and liquid flow from the pipe to the chamber and an open position spaced from the opening beneath the floor. A float is positioned in the internal chamber and a linkage transfers buoyancy force exerted on the float by liquid collected in the chamber to the valve to cause the valve to move from the closed position to the open position when the liquid exceeds a certain depth in the chamber.
    Type: Grant
    Filed: March 3, 1994
    Date of Patent: May 30, 1995
    Assignees: Murray A. Grant, Harold N. Westdal
    Inventor: Bouko J. Kor
  • Patent number: 5419357
    Abstract: A unique design for improved creep strength with a leakage-free structure is presented for manufacture of creep-resistant pressure relief device (PRD) of valves or cylinders or any pressure vessels as a fire protection safety device, the new design being the combination of geometrical configuration of PRD body shell and composite technology wherein the relatively weak matrix phase is dispersed with strong reinforcing agent and such composite mixture of matrix phase/reinforcing agent is contained in a nonslip structure of PRD cavity with a length/diameter ration being greater than about one such that the external load is transferred to the PRD structural body via stress transfer mechanism through reinforcing agents. The PRD's or fuse plugs fabricated by techniques of the present invention exhibit pronounced creep strength and show no gas leakage under high pressure/elevated temperature conditions realized during fires.
    Type: Grant
    Filed: April 16, 1993
    Date of Patent: May 30, 1995
    Assignee: Summit Composite International
    Inventors: Chang Lhymn, Yoon O. Lhymn
  • Patent number: 5419355
    Abstract: An apparatus and method for dissolving a chlorine containing treating material such as calcium hypochlorite in which water is fed to a container preferably in the form of a column containing the treating material. The water is caused to cyclically rise in the container to a predetermined height to dissolve a portion of the material and then discharge to a storage container to empty the material containing container. The height at which the water rises within the container, the cross-sectional area of the container and the length of time the liquid is in contact with the material during the cycle is set to produce a solution having a concentration of from between about 2 to about 18% available chlorine at a feed rate of at least about 2 lbs/hr available chlorine. The cyclical action is preferably achieved through the use of a siphon tube connected to the material holding container and through which the fluid in the container is discharged.
    Type: Grant
    Filed: November 12, 1993
    Date of Patent: May 30, 1995
    Assignee: Olin Corporation
    Inventors: James P. Brennan, Rocco Telese
  • Patent number: 5415200
    Abstract: A manually adjustable service adapter includes a manually adjustable actuation shaft for opening the valve of a charging port of a refrigeration system to permit the charging of refrigerant into such system. Actuation of such charging port results from an axially movable shaft in combination with one of two internal, axially slideable sleeves. The axially movable actuation shaft is manually adjustable by a rotatable knob which causes it to move axially but non-rotatably. Such axial movement of the shaft along with restriction of movement of one slideable sleeve upon abutment against the other slidable sleeve when the adapter is engaged to the charging port, opens the seal between the shaft and such one slideable sleeve while movement of the shaft with its end engaged to the valve of the charging port, opens such valve. Means are provided for preventing rotational movement of the axially movable shaft.
    Type: Grant
    Filed: June 8, 1994
    Date of Patent: May 16, 1995
    Assignee: Aeroquip Corporation
    Inventors: Gregory A. Haunhorst, David S. Densel
  • Patent number: 5415374
    Abstract: A flush valve includes a body with an inlet and an outlet and a valve seat at the outlet. There is a valve movable in the body toward and away from the valve seat to control flow through the flush valve. There is a chamber in the body above the valve and there is a refill orifice in the valve connecting the chamber with said body inlet. Pressure in the chamber maintains the valve closed upon its valve seat, with the size of the refill orifice controlling the time to fill the chamber from the inlet which determines the time of flow of water from the inlet through the outlet. There is a relief valve for venting the chamber to the outlet when the relief valve is open, thereby causing the valve to move away from its seat permitting flow from the inlet through the outlet. There is a cover threadedly attached to the body and a seal element formed from an elastomeric material positioned between the cover and the body.
    Type: Grant
    Filed: July 18, 1994
    Date of Patent: May 16, 1995
    Assignee: Sloan Valve Company
    Inventors: Daniel J. Carroll, Jerry P. Gronwick
  • Patent number: 5413134
    Abstract: A winterizing system (10) for underground sprinkler systems which can be newly installed during the sprinkler system installation, or can be utilized as a retrofit design, having a single valve means (13) and a drive shaft (19) to allow winterization completely from the exterior of building structure (50). Drive shaft (19), which may be flexible for most retrofit installations, is mounted such that it is accessible from the exterior. Upon manipulation of drive shaft (19) inlet port (14) and drain port (16), with connected drain line (24), can be opened and closed by a technician without entrance into building structure (50). Additional features include backflow prevention devices, tamper-proof drive shaft keys, and special connectors.
    Type: Grant
    Filed: May 4, 1993
    Date of Patent: May 9, 1995
    Inventors: Robert K. Burgess, Thomas A. Redle
  • Patent number: 5409039
    Abstract: A service adapter includes a hollow adapter body; a valve seat in the adapter body; a threaded spindle threadedly engaging the adapter body and extending thereinto; a turning knob attached to the spindle, whereby a rotation of the turning knob effects a rotation and a linear displacement of the spindle relative to the adapter body; a valve stem disposed in the adapter body and adjoining the spindle; a valve body attached to the valve stem and cooperating with the valve seat; and a coupling connecting the spindle with the valve stem for transmitting from the spindle to the valve stem forces derived substantially solely from the linear displacement of the spindle. In this manner no appreciable tangential (circumferential) forces are applied to the valve stem to substantially prevent rotation of the valve stem and the valve body.
    Type: Grant
    Filed: March 18, 1993
    Date of Patent: April 25, 1995
    Inventor: Bruno A. Mock
  • Patent number: 5406981
    Abstract: The flow control for fluid circuits having dual power outlets includes a housing having an interior compartment with the compartment having an interior surface, center portion and first and second ends. The compartment has a maximum cross-sectional area at its center portion uniformly decreasing in area towards the first and second ends. First and second outlet fluid ports are located in the housing adjacent the first and second ends. A pressure fluid inlet port is located in the housing at the center portion thereof. A flow control element is mounted for longitudinal movement in the interior compartment and has an outer surface symmetrical in shape to that of the compartment, but has a smaller diameter wherein a fluid flow space exists between the outer surface of the control element and the interior surface of the compartment.
    Type: Grant
    Filed: April 11, 1994
    Date of Patent: April 18, 1995
    Inventor: Charles V. Frederick
  • Patent number: 5407174
    Abstract: A rectilinear motion proportional solenoid assembly includes a cylindrical housing containing an electromagnetic coil having a longitudinal coaxial bore. The housing contains magnetic material for providing a flux path for the magnetic field produced by the coil. A generally cylindrical magnetic pole piece element is inserted into the bore and a movable armature assembly of magnetic material is supported within the bore for movement along the longitudinal axis of the coil by a pair of thin, flexible suspension springs. One of the springs is located within the bore adjacent to one end of the magnetic pole piece whereat an axial gap between the pole piece and the armature is formed. A second spring is located within the housing within the vicinity of a radial air gap between the armature and the housing.
    Type: Grant
    Filed: February 1, 1994
    Date of Patent: April 18, 1995
    Assignee: Puritan-Bennett Corporation
    Inventor: Viraraghavan S. Kumar
  • Patent number: 5406980
    Abstract: A coupling assembly is disclosed having a female element with a conically shaped transition segment integrally formed between a mating segment and a central segment. As the mating segment of the male element is inserted into the female element, the conical transition segment serves to guide to the mating segment into an engaged position with the central segment of the female element.
    Type: Grant
    Filed: March 28, 1994
    Date of Patent: April 18, 1995
    Assignee: Aeroquip Corporation
    Inventors: Alan R. Allread, Frank D. Hawley, Jon A. Jensen
  • Patent number: 5404909
    Abstract: A coupling device 10 includes a nozzle 11 and a receptacle 12. The receptacle 12 includes a poppet assembly 35 that is biased by a spring 41 to a closed position. The receptacle 12 also includes an interface sealing surface 31. The nozzle 11 includes a nozzle valve 75 having a poppet 76 and a valve seat 79. The nozzle 11 also includes an interface seal assembly 85 movable between opened and closed positions relative to the receptacle interface sealing surface 31. The valve seat 79 and the interface seal assembly 85 are both carried on a movable carrier 88, and an actuator assembly 95 is operably connected to effect movement of the poppet 76, the valve seat 79 and the interface seal assembly 85. The actuator assembly 95 holds the interface seal assembly 85 opened during coupling and uncoupling of the nozzle 11 and receptacle 12 and closed during opening and closing of the nozzle valve 75 and receptacle poppet assembly 35. A collar 48 locks the receptacle 12 to the nozzle 11.
    Type: Grant
    Filed: June 11, 1992
    Date of Patent: April 11, 1995
    Assignee: Parker-Hannifin Corporation
    Inventor: Lowell R. Hanson
  • Patent number: 5405120
    Abstract: An aircraft fueling nozzle has a body with a bearing sleeve mounted within the body. The nozzle has a poppet having a stem which is guided by the bearing sleeve. A seat is mounted in the nozzle body for forming a seal with the poppet head. The seat is retained in the body by a resilient lip which encompasses the seat projecting outward and interacts with an inwardly projecting lip on the body. The nozzle has a linkage for moving the poppet including an actuator located upstream of the bearing sleeve which is connected to an arm which overarches the bearing sleeve and is connected to the poppet. The actuator includes a crank which is connected to the arm and an actuator shaft which connects to the crank by interfitting splines. The nozzle further includes a swivel for rotatably coupling the nozzle body to a fuel supply. The swivel includes a replaceable annular bearing ring. The nozzle includes recesses for receiving the lugs of an aircraft fueling flange to secure the flange to the nozzle.
    Type: Grant
    Filed: May 7, 1993
    Date of Patent: April 11, 1995
    Assignee: Whittaker Controls, Inc.
    Inventors: Stephen J. Kerpan, Basil Tilling, Gary F. McKee
  • Patent number: 5402812
    Abstract: A timed water control valve system for use with a shower, which comprises a valve body within a housing having a water flow passage with a water inlet for a source of water and a water outlet for a device to dispense water, which water flow is to be time controlled. The valve body includes first, second and third spool passageways, with the three spools therein tensionally positioned in their respective spool passageways and adapted to move slidably between a water flow position and a non-water flow position. A timer having a rotatable shaft is connected to a knob which on rotatable movement activates the timer to a preselected water flow time period for the flow of water. The knob is also moved between an inward, water non-activated position and an outward, water activated position; first and second cams about the shaft and between the timer and knob permit the rotation of the knob.
    Type: Grant
    Filed: June 20, 1994
    Date of Patent: April 4, 1995
    Assignee: Automatic Specialties, Inc.
    Inventors: Hubert J. Moineau, Alve Erickson, John S. Howland
  • Patent number: 5402823
    Abstract: A pinch valve includes a generally tubular housing including coupling members respectively defining coaxial passages therethrough and adapted for coupling to associated conduits. The passages have tapered seating surfaces which respectively receive the opposite ends of a flexible, resilient, tubular valve member. A two-part housing body is ultrasonically welded together for clamping the coupling members in position and defining a cavity receiving the valve member and an opening into the cavity, the body pivotally supporting a valve lever which projects out of the opening and is movable between an open position leaving the valve member unconstricted and a closed position pinching the valve member closed. In a dual-valve embodiment, two of the valves are supported in parallel relationship at opposite ends of a bridge member.
    Type: Grant
    Filed: December 7, 1992
    Date of Patent: April 4, 1995
    Assignee: George S. Cole & Associates, Incorporated
    Inventor: George S. Cole
  • Patent number: 5401000
    Abstract: A quick connector including a pipe connector at one end and a connecting tube at an opposite end, a slide valve received inside the connecting tube and supported on a conical spring to block up the air passage way through the connecting tube, wherein when a matching male connector is inserted into the connecting tube, the slide valve is moved backwards to open the air passage way permitting a gas to pass from the pipe connector out of the connecting tube through the slide valve.
    Type: Grant
    Filed: January 5, 1994
    Date of Patent: March 28, 1995
    Inventor: Fwu Tsay
  • Patent number: 5398723
    Abstract: A quick disconnect coupling for a liquid handling system is disclosed. When disconnected the first and second coupling members are valved closed. The second coupling member includes an adjustable pressure relief feature. By moving an adjustment member, the operating pressure for the pressure relief can be varied and set at a desired level.
    Type: Grant
    Filed: February 28, 1994
    Date of Patent: March 21, 1995
    Assignee: Aeroquip Corporation
    Inventors: Alan R. Allread, William C. Marrison
  • Patent number: 5398721
    Abstract: An integral gas regulator and flowmeter unit. The unit has a housing body with a high pressure gas inlet, a low pressure gas outlet, and a receptacle. A passage communicates gas to a valve seat in the receptacle. A differential pressure piston having seals at each end is slidably received within the receptacle and is spring biased away from the valve seat. A first end of the piston cooperates with the valve seat for controlling gas flow into the receptacle. A bore within the piston communicates gas from the first end to a second end of the piston. A floating inner flow tube mounted on the second end of the piston receives gas from the bore. A ball is slidably received within the inner flow tube. An outer flow tube overlies the inner flow tube. Both tubes are arranged for being positioned in a normally vertical position and may be marked with graduations for indicating the ball position.
    Type: Grant
    Filed: June 9, 1994
    Date of Patent: March 21, 1995
    Assignee: The ESAB Group, Inc.
    Inventor: David A. Pryor