Matches 1 - 44 out of 44


Match Document Document Title
8887620 Diaphragm installation tool  
An air-driven dual diaphragm pump comprises a pump body with a first air passage leading to a first air cavity with a first diaphragm, a second air passage leading to a second air cavity with a...
8776890 Systems and techniques to actuate isolation valves  
A tool that is usable in a well and may include an operator, a switch, a resilient device and an indexer. The switch may be configured to selectively communicate a first force to the operator,...
8418672 High leverage rotary internal combustion engine  
An internal combustion engine having a generally rotary design is described. The engine includes a rotor that alternately rotates about first, second, and third axes of rotation as the rotor...
7992652 Fluid distributor cylinder for percussive drills  
A fluid distributor cylinder is for a percussive drill assembly that includes a casing having an inner circumferential surface defining a central bore, a central axis extending through the bore, a...
7752957 Hydraulic motor  
A hydraulic motor with rotating shaft coupled to a piston with alternating rectilinear displacement. The hydraulic motor comprises a casing enclosing a rotating shaft, a piston and an inverter...
7178447 Control valve and a method for a percussion device with a working cycle involving several coupling moments  
The invention relates to a control valve, a percussion device and a method of controlling a working cycle of a percussion device. A percussion device (1) for breaking rock includes an impact...
7174824 Control valve in a percussion device and a method comprising a closed pressure space at the end position of the piston  
The invention relates to a control valve, a percussion device and a method of controlling a working cycle of a percussion device. The percussion device (1) used for breaking rock comprises an...
5711205 Self-lubricating, fluid-actuated, percussive down-the-hole drill  
A piston for a fluid-actuated, percussive, down-the-hole drill is provided with self-lubricating bearings and self-lubricating seals within the drill to provide a drill requiring no oil lubrication.
5493944 Pneumatic random vibration generator  
A true random vibration generator for use in mechanical vibration generation includes a housing, a piston, and a programmer. The housing defines a cylinder closed at an impact end. The piston is...
5456076 Balanced compound engine  
A balanced compound, regenerative cycle, external heat source engine is mad by using mechanically double acting rigidly affixed and self-aligned reciprocating opposed piston and cylinder structure...
5095809 Piston vibrator having an asymmetric cylindrical bore  
The invention relates to a piston vibrator comprising a case with at least one cylindrical bore (5), at least one air connection (7) taken laterally to the bore (5), and a piston (2)...
5044254 Reciprocating air motor  
A vibration cancellation device is provided for an air motor with a reciprocating drive piston. The device consists of an anti-phase piston which is axially aligned with the drive piston and...
4889034 Automatic reciprocator with manifold and sleeve valve  
A pneumatic reciprocator includes a cylindrical air cylinder concentrically mounted within a cylindrical manifold. A cylindrical sleeve valve is concentrically mounted for movement along the...
4878550 Pilot-valve-controlled percussion drilling tool  
A down-hole percussion drilling tool supplied with compressed air includes a piston reciprocated in an enclosed cylinder against a bit. A spool is continuously reciprocated in a valve chamber by a...
4630524 Control valve for pile driver and method  
A power driver and method of pile driving. The invention encompasses a pile driver having a ram, cylinder and piston arrangement mounted in a framework, such arrangement being typical of those...
4418609 Well pumping system  
A pumping unit for actuating a linear reciprocable pump rod comprises a frame having a pair of spaced apart vertical guides for guiding vertical reciprocating movement of a traveling pulley...
4350109 Winding arrangements  
A winding arrangement suitable for sheeting in a sail of a yacht comprising a winch drum and a piston cylinder assembly having a double-acting piston which is reciprocable within a cylinder. A...
4201115 Oil well pump jack with dual hydraulic operating cylinders  
An oil well pump jack with dual hydraulically operated piston and cylinder assemblies for pivoting the walking beam of the pump jack and including a unique control arrangement for controlling...
4191016 Pumping jack  
A pumping jack for use with a well having a vertically reciprocable polish rod has a base including a horizontally extending table. A hydraulic cylinder is mounted on the base, with the cylinder...
4184409 Hydraulic engine  
A hydraulic engine having a fluid pump for pumping a fluid medium under pressure to a fluid motor connected to the pump for being actuated by the fluid medium under pressure received from the...
4120316 Flow control valve assembly  
A flow control valve assembly for controlling the flow of a working fluid which has a housing that defines a valve chamber therein, an inlet port to the valve chamber and an outlet port from the...
4099447 Hydraulically operated oil well pump jack  
A hydraulically operated oil well pump jack utilizing a double acting hydraulically operated piston and cylinder assembly for pivoting the walking beam of an oil well pump jack, a linkage...
4070831 Hydraulic drive circuit for machine tools  
A hydraulic drive circuit for machine tools, such as power shears, press brakes, and the like having hydraulic cylinder reciprocated members, controls fluid flow to and from the hydraulic...
3971217 Reciprocatable devices  
A fluid operated reciprocatable device has an outer, usually fixed, member nd an inner relatively movable member joined by a resilient member e.g., of rubber. The outer member is closed at one end...
3971213 Pneumatic beam pumping unit  
A walking beam pumping unit is provided for pumping liquid from wells having gas pressure therein. The unit is driven by gas pressure from the well reciprocating the piston of a pneumatic cylinder...
3942322 Device in hydraulic percussion tools  
A percussion tool is hydraulically operated by a piston whose stroke is controlled by a spring biased valve. A pressure accumulator is connected to the working pressure chamber of a hydraulic...
3889472 Reciprocating apparatus  
The apparatus comprises a carriage 3 moved to and fro alternately along a traverse 1 and which has two opposed resilient gudgeon pins 19 and 22. Each end of the traverse 1 carried a jack 33, 331...
3827459 WATER POWERED DRIVE FOR AUTOMATIC CONTROLLERS  
An automatic irrigation controller apparatus having a cam follower operated bank of pilot valves for operating selected pilot operated water valves throughout a watering or irrigation system is...
3731592 VALVING MECHANISM FOR HYDRAULIC STORAGE MEANS, ESPECIALLY FOR HYDRAULIC TESTING APPARATUS  
The present valving mechanism forms part of the load piston cylinder means, for example, of a hydraulic testing apparatus. The load cylinder is provided with a first control inlet at each end...
3712337 AIR OPERATED TIMING MECHANISM  
An improved air operated timing mechanism is provided for automatically and repeatedly controlling the operation of a given device with the use of fluid power providing utmost safety under...
3689955 WINDOW WIPER SYSTEM  
In a preferred form, this disclosure relates to a window wiper system for wiping a window of an automotive vehicle. The window wiper system includes a fluid motor having a cylinder and a piston...
3609969 HYDRAULIC IMPACT DEVICE  
3400538 Heat engine  
3396631 Fluid-driven engine with improved fluid amplifier valve means  
3384105 Intermitter for gas lift wells  
3361035 Anchor chain retracting device  
3299782 Rack drive fluid engine  
3228301 Pneumatic sawtooth oscillator  
3216328 Vibrator or like apparatus operating on elastic fluid  
3127746 Pneumatic capacitor  
2999572 Earth anchor  
2987004 Fluid pressure device  
2883938 Apparatus for converting motion  
2870581 Reciprocating sander  

Matches 1 - 44 out of 44