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4188971 |
Fluid cutout valve
A valve disposed in a fluid system for cutting off the flow of fluid from a ource of that fluid to a fluid-using environment upon the occurrence of either an excess or unduly high fluid flow rate...
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4178958 |
Non-return devices for welding installations
A non-return device for welding installations, of the kind comprising a movable valve arranged so as to free the passage of gas for the normal supply of the torch from a welding gas generator and,...
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4142544 |
Safety element for closing a line from a pressure vessel
The safety element is disposed at the end of a line which communicates with a pressure vessel. The safety element allows flow from the line into the pressure vessel. Upon an abrupt decrease in...
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4120315 |
Velocity check valve
A velocity check valve is provided which can be installed in oil and gas well production systems to prevent loss of fluid and possible fire in the event of a break or leak in a control line...
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4074692 |
Pipeline break shutoff control
A pipeline shutoff control actuated by movement of a pressure responsive element connected to the pipeline and having a predetermined restraining force applied thereto, said restraining force...
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4071038 |
Failsafe fluid control valve
A displaceable frusto-conical channel is provided typically axially in-line in a housing, the housing being interposed in a fluid supply pipe, e.g. a water supply line. The truncated smaller end of...
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4066095 |
Automatic leakage detection system for pipelines carrying fluids
A plurality of ultrasonic flow meter measurement probes are located at spaced intervals along the length of a pipeline carrying a fluid and each probe measures the rate of flow of the fluid at each...
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4010770 |
Velocity flow control valve for fluid line
A velocity flow control valve employed in a branch line between a main flow line and pressure responsive pilot valves in a safety system for closing a valve across the main flow line. The flow...
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4004607 |
Conduit arrangement with protection against rupture and leakage
A conduit arrangement for heavy duty purposes in which a conduit section, such as a length of flexible hose, may be subjected in use to high stresses from pressures attaining several hundred...
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3977430 |
Ball check valve construction with pressure-responsive reset means
A ball check valve construction provides for safely controlling flow of compressed fluid under a normal operating pressure through a conduit line to a pressure actuated device. The valve...
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3973586 |
Velocity-tubing pressure actuated subsurface safety valve
A subsurface safety valve which is used to control the flow of well fluids through well tubings combines (1) the velocity valve principle of differential pressure and (2) a change in well tubing...
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3971438 |
Wireline safety valve with split ball
A subsurface safety valve for wells has a ball valve supported for rotation between open and closed positions in response to control fluid pressure supplied from the top of the well and a spring...
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3965927 |
Overrun valve for air pumps
Apparatus is disclosed for controlling the rate of air flow in a pressurized air line, and for closing a valve when the air flow exceeds a predetermined maximum flow rate. The apparatus comprises a...
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3949786 |
Automatic combination check valve
A safety valve for pressurized fluid or the like includes a housing having first and second chambers and a valve seat formed in the first chamber. Inlet and outlet conduits are in fluid flow...
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3941145 |
Safety valve
A safety valve for pressure fluid flow lines and which may be utilized in combination with a punch tee, said valve being responsive to pressure differentials acting thereacross for automatically...
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3877524 |
Fluid system
A fluid system incorporating a dry pipe fire sprinkler system is illustrated wherein a valve has a housing with a flow path between inlet and outlet ports, a chamber being interposed in the flow...
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3875965 |
Safety valve for controlling flow
A valve is provided with an inlet and an outlet for receiving fluid pressure from a first fluid pressure source to conduct it to a device such as a valve actuator. The valve housing includes a...
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3850199 |
SHUT OFF DEVICE
An automatic shut off device particularly designed to be positioned upstream of the flexible hose through which the feed water flows to a household automatic washing machine. The device operates if...
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3850189 |
SAFETY VALVE HAVING SEALED RESET MEANS
A safety valve having a pallet movable to close the valve in response to an unsafe condition with manually operable reset means for moving the pallet back to the open position while preventing...
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3844312 |
RAPID EQUALIZING TIGHT SHUT-OFF INTERNAL CONTROL VALVE
Described herein are improved internal valves for use with pressurized containers such as those for storing, or transporting, liquified petroleum gas (LPG). The internal valve is arranged to...
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3831632 |
REMOTE CONTROLLED SAFETY VALVE
An illustrative embodiment of a downhole safety valve apparatus to control a well in the event of a surface disaster, includes a valve actuator moved in one direction toward valve closing position...
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3831429 |
METHOD AND APPARATUS FOR TESTING LOW WATER FUEL CUT-OFF SWITCHES
A method and apparatus are disclosed for use in testing or inspecting low water fuel cut-off switches used with hot water heating boilers. The low water fuel cut-off switches employ floats which...
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3830296 |
SAFETY VALVE FOR USE IN WELLS
A differential pressure safety valve for use in oil and gas wells and the like which comprises an elongated tubular element having upper and lower ends connected by a bore. An annular seat is...
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3830297 |
SUB-SURFACE SAFETY VALVE WITH IMPROVED BALANCING VALVE MEANS
A subsurface safety valve for wells, including a ball shutoff valve closed by well fluid pressure and opened by control fluid pressure supplied from the surface. The subsurface valve includes a...
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3827494 |
ANTI-FRICTION BALL VALVE OPERATING MEANS
A ball valve is supported in a subsurface shutoff valve for wells in a ball guide which transmits the closing force for rotating the ball through fingers which engage the ball adjacent to its axis...
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3805673 |
FLUID SYSTEMS
A valve assembly for use in fluid systems has a valve closure member displaceable relative to a valve seat on the establishment of a fluid pressure difference across the closure member, the closure...
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3800816 |
FUEL LINE SHUT OFF
A device for providing safety shut off of a fuel line in response to an unsafe condition, such as overheating. The device includes a movable diaphragm forming a wall of an expensible chamber and a...
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3799192 |
VELOCITY SENSITIVE SAFETY VALVE
In accordance with an illustrative embodiment of the present invention, a downhole safety valve that closes automatically in response to excessive flow rate or velocity has an enlarged piston...
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3786866 |
LOCKOUT FOR WELL SAFETY VALVE
In a well safety valve for controlling the fluid flow through a well tubing in which the valve closure means is controlled by a longitudinal movable tubular member, the improvement of a lockout...
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3768506 |
HIGH/LOW FLOW SAFETY VALVE
A high/low flow safety valve according to the present invention relates to a valve construction that may be employed in conjunction with flow conduits such as well production tubing and the like....
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3766940 |
PRESSURE LATCHING CHECK VALVE
A check valve contains two chambers connected together by a restricted flow passageway and a valve element movable from one of the chambers to the other chamber through the flow passageway in...
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3765443 |
VELOCITY SENSITIVE SAFETY VALVE MECHANISM
A velocity sensitive safety valve mechanism, according to the present invention, may include a ball valve assembly that is rotated between open and closed positions to control the flow of...
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3763940 |
METHOD AND APPARATUS FOR AUTOMATIC MUD DIVERTER VALVE
A tubular member positioned above a jet nozzle drill bit in a drill string includes a rotatable ball valve which closes to automatically divert drilling fluid and the like in the well bore if the...
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3710822 |
FLUID-FLOW FUSE
An improved pressure-actuated shut-off device designed as a fail-safe mechanism which automatically shuts off the flow of liquid hydrocarbon fuel or other organic liquids or gases when a...
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3709255 |
HIGH PRESSURE VALVES
The present safety valve is installable in the mouth of a pressurized fluid container from which the fluid exits through an inlet, outlet and connecting passageway in the valve casing. A plug is...
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3692043 |
SAFETY APPLIANCE
A safety appliance for preventing an excessive flow of a fluid, e.g. upon a rupture of a pipe or hose leading to a machine or container to which the fluid is supplied under pressure.
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3645286 |
SAFETY VALVE FOR LIQUID PRESSURE CYLINDERS
Valve for use with liquid pressure gas cylinders comprising a valve body having a shank threaded into the cylinder, and having a central bore leading to a valve seat, and a manually actuated valve...
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3633612 |
FLOW INDICATOR AND VALVE
A flow and/or viscosity indicator is provided having a flow-sensing means which is arranged to actuate a signal. A calibrated flow-restricting passage imposes a fluid pressure differential related...
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3628563 |
EXPLOSION DETECTING MEANS FOR A FLUID PIPELINE
A device for detecting an increase in water flow through a water service main and for detecting the pressure drop existing in the water flowing through the main is disclosed. The device operates...
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3628562 |
CLOSING DEVICE WITH A STOP VALVE WHICH IS SITUATED OUTSIDE THE VALVE HOUSING
A closing device, particularly for use in vessels, comprising: A. a valve housing having a passage therethrough; B. a valve adapted to seal said passage through said valve housing; C. a valve rod...
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3626973 |
IMPROVED ON-OFF FLOW CONTROL VALVE
A slide valve having first and second limit positions for the control of fluid under pressure therethrough by either permitting the fluid to flow or blocking the fluid from flowing. The slide valve...
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3623827 |
PROTECTIVE CIRCUIT FOR PRESSURE CHARGING OF NATURAL GAS AND THE LIKE
A protective fluid circuit is in fluid circuit with the high-pressure side of a compressor for natural gas and controls the energization of the power source for the compressor such that when there...
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3621873 |
PNEUMATIC FUSE
The open position of this pneumatic fuse valve is adjustable to change the rate of fluid flow at which the valve closes. The valve has static pressure balance when opened regardless of the pressure...
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3612081 |
APPARATUS AND METHOD FOR MONITORING A FLUID PRESSURE SYSTEM
First and second volume chambers are connected to the fluid pressure system being monitored. Fluid from the system can flow to the chambers, but the fluid flow from the first of the chambers back...
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3568705 |
HYDRAULIC SYSTEM CIRCUIT BREAKER
A hydraulic circuit breaker or fail-safe device is disclosed for sensing leaks in lines to and from hydraulic actuators or the like. Flow through the line is sensed across a restriction on a piston...
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3557834 |
ROTATION DAMPER AND ACTUATOR
A rotation damper and actuator including piston connected both to a stationary housing and rotor housing by toggle linkages thus to effect rotation of the rotor housing during axial and rotary...
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3481362 |
PRESSURE CONTROL DEVICE
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3434493 |
FLOW-SENSITIVE SHUTOFF VALVE
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3422743 |
BLAST ACTUATED VALVE
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3420155 |
DELAY LATCH FOR BLAST VALVES
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