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4901628 |
Hydraulic actuator having a microwave antenna
A microwave method and apparatus for detecting the position of a piston of a pneumatic cylinder. While the piston is being moved by fluid pressure a microwave signal is applied to a cavity defined...
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4899643 |
Hydraulic cylinder comprising at least one electric position indicator
A hydraulic cylinder (1) with a piston (5) made completely or partially of electrically conductive material comprises at least one opening (19, 20) for the mounting of an electric position...
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4899644 |
Fluid cylinder assembly for robot actuators
A fluid cylinder assembly comprising a fluid cylinder having ports disposed at opposite ends thereof communicable with a source of fluid under pressure, a piston disposed in said cylinder having a...
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4898079 |
Electric or electronic position sensor device
The electric and/or electrical sensor or detector device is intended to cooperate with a movable element surrounded by a shell, it comprises an annular clamping collar adapted to be clamped in...
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4896584 |
Piston-cylinder assembly
A piston-cylinder assembly wherein in the cylinder housing there is provided a cylinder chamber extending in axial direction, in which cylinder chamber a piston is movably guided in axial...
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4882977 |
Rotary actuator
A rotary actuator for converting a linear reciprocatory movement of a piston into a rotary reciprocatory movement of an output shaft through a connecting member. The rotary actuator includes a...
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4879440 |
Proximity switch for a cylinder
A proximity switch for signaling the location of a movable member at either of opposite end limits of movement relative to a stationary frame includes a movable member, such as a piston, traveling...
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4876531 |
Position detector for the movable element of a fluid-operated actuator
A device for detecting the position of a movable element of an adjusting member operated by fluid pressure. A cylindrical probe is introduced into the wall of the actuator and extends to near the...
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4860639 |
Flexible tubular wall actuator with end-mounted strain gauge
A pneumatic actuator includes a tubular body made of a rubber-like elastic material and a braided structure made of organic or inorganic high-tensile-strength fibers reinforcing an outside of the...
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4855675 |
Inductive transducers for indicating establishment of a preselected spatial relationship between two parts
Various forms of hydraulic cylinders having axial bores formed in their piston rods, and probes projecting axially from the closed end of the cylinder body with two spaced coils thereon are...
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4846048 |
Hydraulic cylinder with piston and with a magnetic device for piston position determination
In order to obtain a reliable position determination in a hydraulic cylinder optionally exposed to hard frost, it is suggested to mount a magnetically sensitive component in the form of a...
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4843951 |
Servocylinder with an electric piston stroke limiting switch
A servocylinder (1, 3, 4) with an electric piston end position transmitter is suggested. It is constructed as a piezoelectric converter (17 and 18). By means of applying voltage to the...
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4841844 |
Fluid actuators with LVDT feedback mechanisms
A fluid actuator characterized by a linear variable differential transformer (LVDT) feedback mechanism driven off the actuator screw shaft for indicating actuator position. A protective clutch...
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4838146 |
Fluid pressure actuator with anti-rotation slide attached to piston rod
The invention relates to a linear motor with a cylinder (5) containing a piston linked to a piston rod (8) projecting from either of the end faces of the cylinder (5). To secure the piston rod...
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4839591 |
Magnetic stroke sensor for detecting the stroke of a fluid-power cylinder
A method for easy and accurate positioning of a magnetic sensor in a fluid-power cylinder facing a magnetic scale on the lateral surface of a piston rod, wherein the sensor is supported by a hole...
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4819546 |
Device for measuring feed movement
A measuring system is disclosed which is integrated into a feed arrangement in such a way that the structural size of the feed arrangement is not increased significantly. In the disclosed...
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4804913 |
Positioning control system for a fluid powered cylinder
A coil assembly including primary coils disposed at predetermined locations axially spaced from one another and secondary coils provided in association with these primary coils is fixed at one end...
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4794841 |
Pneumatic drive mechanism for positioning apparatus
A pneumatic drive mechanism for use with positioning apparatus or the like, having a drive housing, a drive element such as diaphragm disk, piston or the like, movably seated therein and rigidly...
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4793241 |
Piston position detector for fluid pressure cylinder
In a piston position detector for a fluid pressure cylinder operating by fluid pressure such as air pressure or oil pressure, a permanent magnet is mounted on a piston sliding in a non-magnetic...
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4791854 |
Hydraulic piston and cylinder arrangement in which the outer wall of the piston rod is free from fluid
A hydraulic piston and cylinder arrangement retains the outer surface of a sleeve forming the piston in dry condition. The cylinder provides an outer wall and an inner stem with the sleeve sliding...
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4784576 |
Pump pressure sensor
A back pressure sensor for a positive displacement pump comprises at least one flexible beam having a pivot end and a drive connector end, and a pump actuator mounted between the pivot end and the...
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4783580 |
Fluid actuated control device
A fluid controlled actuating device is described which facilitates rapid and controllable actuation of devices adapted for momentary actuation.
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4781535 |
Apparatus and method for sensing diaphragm failures in reciprocating pumps
Apparatus for monitoring the diaphragm integrity in a diaphragm pump. A single continuous circuit trace is supported on a pump diaphragm. An electrical circuit is connected to the continuous...
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4773222 |
Pneumatic brake booster with booster-cylinder-end retained relay valve
A pneumatic-hydraulic booster for vehicle includes a master cylinder part; a pneumatic cylinder part combined with the master cylinder part which includes a power piston slidable fitted to a...
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4771604 |
Pneumatic brake booster with relay valve in the booster-cylinder-end
A pneumatic-hydraulic booster for vehicles includes a master cylinder part; a pneumatic cylinder part combined with the master cylinder part including a power piston slidably fitted to a...
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4771866 |
Shock absorber with proximity switch
A shock absorber includes a piston slidably mounted in a fluid cylinder for decelerating the motion of an object acting on the shock absorber. A metering mechanism adjusts the rate at which fluid...
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4760859 |
Modular pressure instrument
A modular transmitter has an outer housing with a wall forming an interior cavity in which a control module is inserted. The wall has one or more ports therein that are connected to pressure...
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4757745 |
Microwave antenna and dielectric property change frequency compensation system in electrohydraulic servo with piston position control
An electrohydraulic servo system which includes an actuator having a cylinder and a piston variably positioned therewithin, a servo valve responsive to valve control signals for coupling the...
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4756229 |
Digital motor feedback for a position actuator
A linear actuator (42) includes a housing (44), and a linearly displaceable piston (46) having a shaft (48) with a gradated position scale (60) and a gradated direction scale (62) disposed by ion...
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4754691 |
Fluid operated devices for moving articles
A fluid pressure operated device comprises a body adapted for moving an article and carrying magnets coupled to other magnets on a piston movable by fluid pressure in a cylinder. The body also...
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4752657 |
Proximity switch mounting apparatus
A mounting apparatus for a proximity switch for sensing the position of a piston within a fluid operated, expandable chamber cylinder. The mounting device comprises a block shaped member with at...
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4751867 |
Pressure fluid operated cylinder device
A pressure fluid operated cylinder device having means to indicate that the piston (14) is at or near an end position. The indicating means comprises a rod-like member (1) which is actuated by the...
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4744386 |
Modular hydraulic actuator
A surface safety valve hydraulic actuator of modular construction. The actuator includes separately installable, removable, and interchangeable wirecutting and non-wirecutting spring modules, used...
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4742794 |
Trim tab indicator system
A trim tab indicator system comprising a pair of trim members hinged to the stern of a boat, one of each side of the center line of the boat and a hydraulic cylinder individual to each trim member...
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4742194 |
Device for producing an electric signal indicative of pressure in a fluid system
Improvement to electro-fluid relays useable to signal either the maximum or minimum limit of pressure in a fluid system, or the position of a movable part of a jack. The relay is constituted of a...
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4736674 |
Abutment arrangement and position detector for a piston and cylinder actuator
The invention relates to an abutment arrangement for limiting the stroke of a piston and cylinder actuator. The abutment arrangement comprises an integrated detector which may be in the form of a...
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4726282 |
Fixture cylinder with proximity switches mounted on end caps without spacers
A fixture cylinder is provided that permits the use of integrally mounted proximity switches with the same fixed probe lengths on both end caps without requiring the use of spacers. The cylinder...
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4714006 |
Fluid actuator with feedback mechanism
A fluid actuator characterized by a feedback mechanism for indicating actuator position. The feedback mechanism is driven by the actuator screw shaft, whereby the movements of the feedback...
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4709126 |
Pressure switch with rolling diaphragm
A pressure switch including a housing 10, electrical contacts 16, 24 within the housing and a lever 26 movably mounted within the housing and operable to effect relative movement between the...
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4681992 |
Cushioned clamp cylinder with proximity switches
A cushioned clamp cylinder with proximity switches includes a cap of square shape defining a plurality of right angularly related end faces with a cushion chamber in the cap and a sensing port in...
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4679452 |
Limit sensing device
A mechanical limit sensing device or limit switch for piston and cylinder actuators has a housing in which a rocking lever is pivoted so that its one end is moved by part of the actuator to be...
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4679429 |
Hydraulic ram stroke monitoring apparatus
Apparatus for monitoring the working stroke of a hydraulic ram 1 includes an indicator 3 having a housing 24 containing a tubular measuring chamber 25 connected to the hydraulic ram by a hydraulic...
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4664019 |
Linear power and motion transmission apparatus
A linear motion transfer apparatus has a longitudinally slit elongated tubular structure (1) closed at its ends, in which a force accepting element (4) driven in the axial direction is guided in a...
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4656457 |
Position-sensing potentiometer arrangement
A position-sensing potentiometer arrangement for sensing the position of a movable piston and piston rod configuration within a linear actuator includes a first support member extending...
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4647003 |
Remote control actuating device for a valve
An actuating device operated by a pressure medium, such as compressed air, acting within a housing, can be secured to a valve by a mounting member attached to the valve. The actuating device...
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4635901 |
Position indicator for valves
There is disclosed herein an apparatus forming a part of an actuator for providing a constant visual display of the position of a valve. Such apparatus comprises an indicator shaft rotatably...
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4632018 |
Fluid cylinder position sensor mounting apparatus
A position sensor mounting apparatus for fluid operated, expansible chamber cylinders includes a housing which receives and supports a position sensor. A coupling member is threadingly engageable...
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4621565 |
Hydraulic slave cylinder switch
An electrical switch for sensing operation of a hydraulic cylinder, the switch being normally open and closing an electrical circuit when the cylinder is pressurized to effect a desired operation...
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4617855 |
Hydraulic slave cylinder switch
An interlock switch mounted in the end of a hydraulic slave cylinder adapted to operate the release mechanism of a motor vehicle mechanical clutch, the slave cylinder being hydraulically connected...
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4608912 |
Linear hydraulic actuator having ballistic tolerant
A ballistic tolerant linear actuator incorporates a piston (16, 46, 76) and piston rod (38, 42 or 48, 50 or 90, 92) within a cylindrical housing (58, 60 or 81, 88) connected at each end (14, 22 or...
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