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6491114 |
Slow start control for a hydraulic hammer
A control system for a heavy duty hydraulic hammer reduces blank firing of the hammer. The control system provides a reduced flow of hydraulic fluid to the hammer for a selected period of time upon...
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5934176 |
Hydraulic operating system
A hydraulic operating system has a cylinder which is actuated to raise, hold or lower a load against the force of gravity. An electromagnetic 3/2 valve connects a working chamber of the cylinder to...
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4593586 |
Tracer control circuit for machine tools
The piston rod of a longitudinal feed cylinder of a tracer controlled lathe is connected with the lathe carriage by means of an operative connection consisting of another hydraulic cylinder or a...
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4585071 |
Method and apparatus guiding retractable machinery
A retractable tool apparatus is adapted to be mounted on a movable vehicle for working the area around and between objects in a row. The tool apparatus includes an extendable and retractable...
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4561343 |
Sequencing valve mechanism
A sequencing valve mechanism utilized to control a pneumatic or hydraulic pressure medium from an on/off type pressure source to a two-chambered pneumatic or hydraulic appliance is disclosed. A...
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4503888 |
Servovalve spool control for digital rotary servovalve
A rotary to linear control for actuating an axially movable spool of a digital rotary input servovalve has a threaded drive between a rotating nut and a threaded shank directly connected to the...
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4481451 |
Electronically controlled positioner for pneumatic actuators
An electronically controlled apparatus for controllably positioning pneumatic actuators includes, in a first embodiment, first means for selectively flowing compressed fluid to the actuator and...
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4285546 |
Tunnel profile control
An apparatus and method for controlling the profile of an aperture cut by a cutting head capable of traversing movement in two directions at right angles to each other, e.g. the cutting head of a...
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4274474 |
Hydraulic control and drive device for rotary heat exchanger
A rotary regenerator is provided with a hydraulic drive system to vary the rotational speed in relation to the temperature scanned. The hydraulic control system provides accurate operation at low...
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4187762 |
Drive and motion synchronizing apparatus for a hydraulic system
An apparatus providing for the generation, control and application of power to a cyclic functioning machine, using fluids under pressure to transmit and control energy by means of a rotary,...
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4170165 |
System for operation of gas controlled devices embodying an automatic programmable value sequencer adapted to cease operation upon the occurrence of a malfunction
The specification discloses an automatic programmable valve sequencer employing a rotatable cam cylinder operating adjacent cam valves by means of cam segments mounted thereon to directly operate...
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4087988 |
Cryogenic expansion machine
A cryogenic expansion engine includes intake and exhaust poppet valves each controlled by a cam having adjustable dwell, the valve seats for the valves being threaded inserts in the valve block....
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4046180 |
Automatic control apparatus for waney edge forming machines
Control apparatus including first and second hydraulic cylinders hydraulically interconnected in parallel. Cam operated means for reciprocating the piston in the first cylinder, this causing...
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4004497 |
Automatic systems programmer
A programmer includes an intermittently rotating drum, having thereon a series of actuators arranged in a pre-selected manner, for actuating in a predetermined order, a plurality of devices, such...
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3941031 |
Pneumatic controller for controlling the operation of an automatic machine
A controller for controlling the operation of an automatic machine which includes a number of pneumatically operated devices, for example a machine for blow moulding hollow glass articles,...
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3863681 |
DEVICE FOR DRIVING MOVABLE MACHINE PARTS IN REVERSE DIRECTION
Device for driving movable machine parts, particularly in dobbies, in reverse directions. The device has at least one double-acting piston driving unit and at least one double-acting piston driven...
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3752036 |
PROGRAMMABLE FLUIDIC LOGIC CONTROLLED MACHINE TOOL
A program controlled automatic machine tool having three carriages respectively movable parallel to X, Y and Z axes that are perpendicular to each other. The X and Y carriages are horizontally...
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3732782 |
VARIABLE GAIN AMPLIFIER FOR HYDRAULIC SERVO-CONTROL SYSTEMS
An hydraulic servo-control system has a variable gain amplifier which generates a control force large enough to overcome static forces resisting movement of a machine slide and minimize the effect...
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3726184 |
STRUCTURE OF FLUID PULSE CYLINDER FOR NUMERIC CONTROL AND A METHOD OF MAKING THE SAME
A fluid pulse cylinder for numeric control in an oil pressure or air pressure cylinder includes the combination of a pulse motor and a fluid cylinder. A slider having a pressurized fluid path, a...
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3707880 |
HYDRAULIC BRAKE BOOSTER WITH PISTON RETURN DEVICE
A brake applying mechanism having a chamber with inlet and outlet ports, a piston slidably arranged in the chamber and a valve to be controlled by an operator for admitting fluid under pressure...
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3687009 |
PNEUMATIC HARNESS PLUG ASSEMBLY OR THE LIKE
This disclosure relates to a plug connector for interconnecting a plurality of conduit means to output passages of a pneumatic programmer, the plug connector having a flexible plate-like body...
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3675890 |
BOOSTER SERVO CONTROLLED VALVE CONTROL MECHANISM
A valve control mechanism is provided which is particularly well suited to be used in conjunction with an hydraulically operated machine tool, such as a milling machine, lathe, or similar machine....
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3611877 |
MOTORS
A servomotor primarily for rack and pinion power steering comprises a piston rod extending through the end members of a cylinder and carrying a piston assembly within the cylinder. An operating...
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3590687 |
SERVOSYSTEM
The specification describes a servosystem which, in the specific form selected for illustration, comprises a hydraulic servo for position control of the aileron, spoiler, elevator, rudder or other...
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3589498 |
BOBBIN HANDLING SYSTEM
A bobbin handling system in which bobbin carriers of an overhead conveyor receive various types of bobbins from delivery stations and deliver the bobbins to receiving stations. A control system...
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3574292 |
INTERFEROMETER MOTION AND VELOCITY CONTROLLER
An interferometer measuring system which constitutes means of measuring the magnitude and velocity of relative motion between two parts along a defined path, coacts with numerical command reference...
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3528340 |
CONTROL ARRANGEMENT FOR FLASH WELDER AND THE LIKE
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3488123 |
APPARATUS FOR CONTROLLING THE VELOCITY OF AN ELECTROMECHANICAL DRIVE FOR INTERFEROMETERS AND THE LIKE
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3587395 |
PNEUMATIC CONTROL SYSTEM AND PARTS THEREFOR OR THE LIKE
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3606817 |
FLUIDIC POSITIONING CONTROL SYSTEM
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3719122 |
CONTROL MEANS AND A METHOD OF CONTROLLING THEREBY
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3555941 |
TRACER CONTROL CIRCUIT WITH SIZING MEANS
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3820439 |
TRACER CONTROL CIRCUIT FOR MACHINE TOOLS
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3485531 |
PROGRAM CONTROLLED CONTOUR CUTTING BORING MINER
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3475996 |
MACHINE TOOL PROGRAMMER
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3474624 |
HYDRAULIC CONTROL SYSTEM
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3468066 |
INDEXING MECHANISM FOR MACHINE TOOLS
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3463051 |
POSITION CONTROL EQUIPMENT
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3459402 |
TRACER VALVE ASSEMBLY
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3398688 |
Apparatus for making knop yarn
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3398346 |
Unbalance valve with lid reset
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3390859 |
Tracer control valve assembly
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3378898 |
Textile package laydown device
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3377111 |
Precision coordinate axes table means
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3368457 |
Hydraulic control arrangement
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3343459 |
Control system
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3341099 |
Fluid operated sensing head
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3335525 |
Hydraulic system for grinding machines
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3309964 |
Machine tool
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3298283 |
Fluid transmission system
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