| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 091218000 | CYCLICALLY OPERABLE | 21 |
| 20120260795 | RING CAM AND FLUID-WORKING MACHINE INCLUDING RING CAM - A fluid-working machine comprising a ring cam, at least one piston defining a working chamber, and at least one valve associated with the or each working chamber for connecting the working chamber alternately to low and high pressure manifolds in phased relationship to cycles of working chamber volume. The ring cam has a wave-like cam working surface for operative engagement with the at least one piston. The waves of the wave-like cam surface each having a leading face and a trailing face and discontinuities, such as apertures to retain bolts, are located in the working surface on whichever of the leading face and the trailing face the at least one piston does least work during normal operation resulting from the flow of fluid into and out of the working chamber in phased relationship to cycles of working chamber volume. | 10-18-2012 |
| 20130269512 | PISTON VIBRATOR - A vibrator has a hollow body with two end walls, a first piston slidably housed within the body, a first chamber defined therein and communicating with an inlet and bounded by a first active surface of the first piston, and a second chamber bounded by a second active surface of the piston, larger than and opposite the first active surface. The first piston slidingly houses a switch unit having at least one second piston and controlled by a fluid switch circuit having an inlet portion formed in the first piston and communicating with the first chamber. An outlet portion is formed in the first piston and communicates with the outlet. A switch portion, which is defined by the switch unit, communicates with the second chamber, and connects the second chamber to the inlet portion and to the outlet portion alternately as a function of the switch unit's axial position. | 10-17-2013 |
| 20140083287 | HYDRAULIC MOTOR CAPABLE OF MANY DIFFERENT APPLICATIONS ABLE TO USE LOW-PRESSURE OR HIGH-PRESSURE FLUIDS TO OPERATE - A hydraulic motor able to use low-pressure or high-pressure fluids such as water for a large number of applications. The motor uses a flow of water that is controlled and directed through a system of supply tubes to a chamber that fills with the fluid, moving a piston that produces an action such as rotating a shaft to turn a brush. Fluid fills the chamber through a system of opening and closing valves that direct and control the flow of the fluid so that the piston exerts pressure against a spring until it reaches a maximum position. A system of valves then reverses the flow of fluid until the piston is pushed in the opposite direction, producing an action such as turning a brush through the alternating application of water flows. A one-way gear box may be used to control the action of a shaft, which may be directed to turn in the same direction or in alternating directions to accomplish a wide variety of applications such as an hydraulic brush, gearbox speed increaser, generator or washing machine. | 03-27-2014 |
| 091232000 | Valveless distribution | 5 |
| 20110232475 | INTEGRATED CYLINDER AND REVERSING ASSEMBLY MODULE OF A RECIPROCATING PNEUMATIC TOOL - An integrated module of cylinder and reversing assembly of a reciprocating pneumatic tool is arranged between an air pressure guiding seat and a guiding cylinder of piston rod in the groove of a reciprocating pneumatic tool. The integrated module includes a cylinder body with a hollow body shaping an inner/external end and a chamber. The chamber is used for accommodating the piston of the piston rod. Several air flow ducts are laterally set at interval onto the chamber. A reversible actuating slot is recessed into the inner end of the cylinder body, and provided with a through-hole connected with the chamber of the cylinder body. A reversing brake block is accommodated movably into the reversible actuating slot. A spacing ring is accommodated into the reversible actuating slot to limit the reversing brake block. The cylinder and flow reversing body can be combined to simplify the structural members. | 09-29-2011 |
| 20110239854 | VAPORISATION SYSTEM - A gas powered device includes a vaporisation system. The vaporisation system includes a conduit connected at one end, or configured to connect at one end, to a regulator for a high pressure fluid source. The other end of the conduit supplies an operating mechanism of the device The path of the conduit is such that a substantial length of the conduit is adjacent the operating mechanism. | 10-06-2011 |
| 20160184864 | VIBRATION GENERATING DEVICE - The present invention relates to a vibration generator, an more particularly to a technology in which an actuating shaft protrudes from the opposite ends of a housing such that vibrations generated from the actuating shaft are alternately output in opposite directions of the housing so as to improve vibration efficiency and such that a single vibration generator simultaneously applies the vibrations to a plurality of external objects so as to additionally enhance an economic effect. Furthermore, the present invention relates to a technology in which an actuating shaft protrudes from the opposite ends of a housing, thereby enabling stable installation. In addition, the present invention relates to a technology in which a fluid supply tube is configured to be movable in the axial direction of an actuating shaft so as to prevent breakage of the connected portion of the fluid supply tube, which might otherwise occur during the operation of the vibration generator. | 06-30-2016 |
| 091234000 | Working member formed to provide internal fluid flow passage | 2 |
| 20080245220 | Percussion Mechanism and at Least Percussively-Operated Hand Machine Tool With a Percussion Mechanism - The invention relates to a percussion mechanism for an at least percussively-operated hand machine tool, in particular a hammer drill or chisel, comprising a drive motor and a tool holder ( | 10-09-2008 |
| 20090139394 | Self starting vibrator - Briefly, the invention comprises a vibrator with an on-demand start-up system, that inhibits fouling the atmosphere, with one embodiment of the invention including an integral non-fouling start-up system wherein at least one of the bearing surfaces contains a surface adhered lubricant so as to provide an on-demand static start-up system and in another embodiment the on-demand start-up system is a dynamic system that can unbalance the differential forces on the piston therein to ensure that the vibrator will begin vibrating “on-demand”. Thus, two types of start-up systems are available one an on-demand static start-up system and the other an on-demand dynamic start-up system with either of the systems can be used alone or if desired in combination to provide redundant start-up systems. | 06-04-2009 |
| 091275000 | Electrically or magnetically actuated or adjusted distributor (459) | 2 |
| 20080250918 | Pneumatically self-regulating valve - A pneumatic motor that includes a cylinder, a piston disposed in the cylinder, and a pneumatically-reset pilot valve. In certain embodiments, the pneumatically-reset pilot valve is configured to move to a first position in response to a change in pressure in the cylinder. | 10-16-2008 |
| 20140123845 | RODLESS POWER CYLINDER - A rodless power cylinder includes a cylinder body, a piston assembly adapted to reciprocate in the cylinder body, a magnet mounted at each of the two ends of the piston assembly, a valve mounted at each of the two ends of the cylinder body for guiding a flow of air or fluid in and out of the cylinder body to cause the piston assembly to reciprocate, a magnetic sensor mounted in a sensor mounting groove at each of the two valves for sensing the position of the respective magnet, a movable member mounted around the cylinder body and coupled to the piston assembly by a magnetic force for synchronous reciprocating motion | 05-08-2014 |
| 091277000 | Adjustable working member reversal position (e.g., stroke control, etc.) | 1 |
| 20110168011 | DEVICE FOR CONTROLLING THE STROKE OF AN ACTUATOR - This invention relates to a feedback control device for controlling the stroke of an actuator stroke driven by a working fluid. The feedback control device for controlling the stroke correctly controls the stroke using a simple means by compensating secular changes in the flow rate control valve that controls the working fluid. The device for controlling the stroke of an actuator | 07-14-2011 |
| 091281000 | Working member controlled motive fluid for distributor motor | 5 |
| 091286000 | Distributor or distributor motor mechanically moved cyclically to control actuating fluid for distributor motor | 1 |
| 20100107863 | DEVICE MEANT FOR CONTROLLING OF AN OSCILLATING CYLINDER - An arm structure intended for controlling the impulse valve ( | 05-06-2010 |
| 091290000 | Working member traverses pilot port in working chamber side wall | 1 |
| 091297000 | With passage for pilot fluid in working member | 1 |
| 20150322973 | AIR-TO-HYDRAULIC FLUID PRESSURE AMPLIFIER - An air-to-hydraulic fluid pressure amplifier comprising an air cylinder having an internal reciprocating air piston; a first hydraulic cylinder having a first valve fitting and a first internal hydraulic ram that is slidably positioned within the first hydraulic cylinder; a second hydraulic cylinder having a second valve fitting and a second internal hydraulic ram that is slidably positioned within the second hydraulic cylinder; a first flow control valve and a second flow control valve; a first plunger-operated pilot valve and a second plunger-operated pilot valve. Each of the first and second plunger-operated pilot valves comprises an inlet port, an outlet port, a plunger, a barrel, and a compression spring. | 11-12-2015 |
| 091303000 | Working member adapted to directly mechanically reverse distributor | 1 |
| 20160144498 | PERCUSSION PISTON - A percussion piston for a rock drill machine having a pilot cylinder, a distributor and a pressure medium includes a control edge configurable to cause a change in the position of the distributor in a direction parallel to the axial direction of the percussion piston as the percussion piston moves in the impact direction (A) in relation to the pilot cylinder. The control edge of the percussion piston includes at least one notch provided on the outer periphery of the control edge and arranged to cause a start of a state change for the distributor before the control edge of the percussion piston passes by a corresponding control edge provided on the distributor or pilot cylinder | 05-26-2016 |
| 091304000 | Pilot valve controlled distributor motor (461) | 2 |
| 20080250919 | Valve with magnetic detents - A motor including a piston disposed within a cylinder and a valve configured to control a flow of a fluid into the cylinder. In some embodiments, the valve has a housing, a valve member disposed in the housing, and a magnetic detent configured to resist movement of the valve member within the housing. | 10-16-2008 |
| 091308000 | Fluid-operated pilot valve | 1 |
| 20090211434 | FLUID PRESSURE POWERED APPARATUS - A fluid pressure powered apparatus comprises a double-acting member, a first pilot valve, a second pilot valve, and a switchable valve is disclosed. The double-acting member is operable between a first stroke end and a second stroke end by fluid pressure from the switchable valve. The first and second pilot valves are configured to establish a biasing fluid pressure to first and second bias surfaces, respectively, of the switchable valve. The first and second pilot valves are actuatable by the double-acting member when at the first and second stroke ends, respectively, to reduce the biasing fluid pressure on the first bias surface. In operation, the reduction of biasing fluid pressure on either the first bias surface or the second bias surface, respectively, triggers the switchable valve to switch between a first stroke position and a second stroke position, respectively. A method of reciprocating a fluid pressure powered apparatus is also disclosed. | 08-27-2009 |
| 091325000 | Working member controlled inlet or exhaust port (e.g., semi-valveless, etc.) | 1 |
| 20140000447 | PNEUMATIC MOTOR | 01-02-2014 |
| 091344000 | Biasing means moves distributor after predetermined travel (i.e., snap action) | 4 |
| 20130008302 | RESILIENT RETURNING DEVICE FOR A POWER OPERATED PISTON TOOL - A resilient returning device for a power operated piston tool comprises a one piece elastic bellow-shaped body including a plurality of repeating pleats, each of which has two pleat halves that cooperatively define a first elbow therebetween. Each of the pleat halves of each of the pleats cooperates with an adjacent one of the pleat halves of an adjacent one of the pleats to define a second elbow therebetween. Each of the first and second elbows has a bulging side. The bellow-shaped body is formed with a plurality of loop-shaped grooves that are indented from the bulging sides of the first elbows of the pleats or the bulging sides of the second elbows of the pleats, respectively. | 01-10-2013 |
| 091346000 | Spring biased | 3 |
| 20100154625 | HYDRAULIC MACHINE, IN PARTICULAR HYDRAULIC MOTOR, AND METERING DEVICE COMPRISING SUCH A MOTOR - A hydraulic machine includes a casing with a body and a cover; a separation member which can make a reciprocating movement and defines two chambers; hydraulic switching elements including a distribution member; a compartment in the body of the casing connected to a pressurized-liquid inlet, and initiating elements including a pusher connected to the separation member, these initiating elements being able, at the end of the stroke, to cause a sudden change in the position of the switching elements, under the action of an elastic member to reverse the stroke. The distribution member has a distribution slide valve applied against a flat plate which is fixed relative to the body of the casing, the slide valve being able to slide in a fluid-type manner, without a seal, against the plate, which has orifices connected respectively to the chambers and to a liquid outlet orifice. | 06-24-2010 |
| 20130255479 | Compressed air single-action actuator - A compressed air single-action actuator includes an actuator body, a solenoid valve is provided in the actuator body, a solenoid valve plate is provided between the actuator body and the solenoid valve, a gas chamber is provided on the side face of the actuator body, an O-ring seal is provided between the gas chamber and the actuator body; a first inlet passage communicated with the gas chamber is provided on the actuator body, a check valve is provided at one end of the gas chamber of the first gas inlet passage, the other end of the outlet is provided at a right back side of the Namur interface; a second gas inlet passage is provided on the actuator body communicated with the gas chamber, the outlet of the second gas inlet passage is provided at an upper left side of the Namur interface. | 10-03-2013 |
| 20140318363 | HARMONIC UNIFLOW ENGINE - A reciprocating-piston uniflow engine includes a harmonic oscillator inlet valve capable of oscillating at a resonant frequency for controlling the flow of working fluid into the engine. In particular, the inlet valve includes an inlet valve head and a spring arranged together as a harmonic oscillator so that the inlet valve head is moveable from an unbiased equilibrium position to a biased closed position occluding an inlet. When released, the inlet valve head undergoes a single oscillation past the equilibrium position to a maximum open position and returns to a biased return position close to the closed position to choke the flow and produce a pressure drop across the inlet valve causing the inlet valve to close. In other embodiments, the harmonic oscillator arrangement of the inlet valve enables the uniflow engine to be reversibly operated as a uniflow compressor. | 10-30-2014 |
