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Match Document Document Title
8006776 Sliding pressure control valve for pneumatic hammer drill  
A pneumatic device control apparatus and method comprising a ported valve slidably fitted over a feed tube of the pneumatic device, and using a compliant biasing device to constrain motion of the...
7785080 Downhole ram pump  
A downhole ram pump. A downhole pump system includes a flow restricting device which variably restricts fluid flow through an opening, the restricting device vibrating in response to the fluid...
7207116 Air saw  
A main spindle of an air saw is reciprocated by sliding a piston in a cylinder chamber with the pressure of air supplied to the cylinder chamber via an air supply path so as to alternately apply...
6862973 Pneumatic motor  
In one embodiment a pneumatic motor is provided that includes an intake chamber in fluid communication with at least one intake channel. Each intake channel is further in fluid communication with a...
6629487 High efficiency non polluting engine  
A high efficiency not polluting engine comprises at least a cylinder and at least a piston movable therein, the cylinder including, alternately, a pre-chamber in the cylinder head and/or a chamber...
6230605 Piston-to-cylinder seal for a pneumatic engine  
Within a piston cylinder of a pneumatic engine, the system includes a piston proportioned for complemental travel within a piston cylinder, the piston having a radial compression surface and...
5417294 Pneumatic hammer  
A hammer of the type having an impact tool driven by pressurized fluid has a hammer body portion with a closed rearward end and an open forward end and a piston longitudinally movably housed within...
5309713 Compressed gas engine and method of operating same  
A compressed gas engine (20) has a piston (25) mounted for reciprocating movement within a cylinder (22). A valve (29) is slideably mounted on the cylinder head (31) to control the flow of...
5115717 Ramming apparatus  
A ramming apparatus having a shortened length without sacrificing ramming power requirements is disclosed comprising a housing having a front end and a rear end, a pneumatically driven percussion...
5085284 Hybrid pneumatic percussion rock drill  
A fluid actuated percussion rock drill comprising a hollow wear sleeve and a piston slidingly disposed within the wear sleeve. Drive and return pressure surfaces bias the piston between drive and...
4993501 Hydraulic hammer in particular for use in dusty and/or corrosive environments  
A hydraulic hammer is provided, suitable for use as a crust-breaker of aluminum electrolysis pots, having a hydraulically actuated beating mass reciprocally movable in a cylindr to strike against a...
4945815 Pneumatic type of reciprocating movement device  
A pneumatic type of reciprocating movement device capable of a high cycle speed over a short stroke. A rod member with a flange is slidably mounted in a cylinder member such that the flange divides...
4885978 Fluid-operated miniature engine  
Miniature engine operated by an expanding gaseous fluid, which comprises a cylinder (18), piston (20) and inlet valve (29), the upper part of the piston (20) cooperating with a radially expansible...
4681021 Driving apparatus  
A driving apparatus for producing a to-and-fro movement and having four plunger cylinders and four external non-return valves. Such driving apparatus is distinguished by a particularly simple...
4526190 Control valve assembly  
A control valve assembly for a pneumatic paving breaker which enables the maximum amount of energy to be imparted to the piston on its working stoke while restricting the energy imparted to the...
4467699 Pneumatic motor  
A valveless, pneumatic motor including a cylinder within which a hammer piston reciprocates and a buffer ring fixedly secured within the cylinder. A source of motive fluid under pressure cooperates...
4448262 Pneumatic hammer  
A starting arrangement for a reciprocating piston pneumatic hammer provides a passageway in the piston which couples a pneumatic piston subchamber to an exit port to exhaust pressurized pneumatic...
4446773 Compressed air distributor for a reciprocating concrete breaking type machine  
A compressed air distribution system to control the movement of a reciprocating concrete breaking jackhammer wherein a plastic distributor made of two individual pieces is provided with a seat on...
4401168 Impact applying mechanism  
There is disclosed an impact applying mechanism, particularly as applied in a subterranean drilling apparatus, and comprising a cylinder (13) arranged with its axis substantially vertical and...
4355564 Pneumatic reciprocating mechanism  
A pneumatic reciprocating mechanism comprising a working member (11) reciprocably powered in a housing (10) and forming together with a vibration absorbing reaction support member (12) and an...
4351225 Vibration attenuation construction for an impact air tool  
A vibration and noise attenuating construction for impact air tools, such as a chipper, includes axially reciprocal working and balancing members which move toward and away from each other. The end...
4342543 Oil level control  
An oil level control system uses an available pressure source to operate a fluid motor which is integrally connected with a reciprocating fluid pump. The pump has an inlet passage disposed at the...
4340121 Pneumatic rock drills  
A pneumatic motor for rock drills and the like having a reciprocating piston with valves at its opposite ends for valving motive air to the piston head from both ends of the cylinder. Large...
4303002 Hand-operated pneumatic impact machine  
A hand-operated pneumatic impact machine comprising a hollow body with an axially-reciprocating impact ram inside which forms, together with the body, variable-volume working chambers. It also...
4293045 Impacting device  
An impacting device useful with a pneumatic drive comprises a housing formed with an outer large-diameter bore and an inner small-diameter bore defining an annular shoulder at their juncture. A...
4287810 Drive for a pneumatic hammer  
A pneumatic drive for a hammer tool has a cylinder; a piston slidably received in the cylinder and dividing the inner space of the cylinder into two cylinder chambers; a drive output member formed...
4283991 Percussion mechanism  
Fluid-actuated percussion mechanism includes a housing with an internal cylindrical space receiving a reciprocating piston dividing the space into a working stroke chamber and an idle stroke...
4283995 Reciprocating engines  
In a hydrazine powered engine, an intake valve arrangement for positively controlling the opening and closing of the poppet valve in a hot gas cylinder, the poppet valve being operated by the...
4254628 Sliding-valve in a heating-chamber combustion engine  
A heating-chamber is provided for a heating-chamber combustion engine. A piston is provided with a detachable extension on the flat bottom of the piston, which towers upwardly and reaches during...
4248133 Impact mechanism  
An impact mechanism operated with gaseous fluid under pressure fed from a source of fluid having a casing with an inner cylindrical space. A piston is accommodated for reciprocation within the...
4168655 Power output control system for vapor engine  
A vapor engine including a cylinder in which a piston reciprocates and having an inlet valve in the cylinder head which is driven from its seat by the piston as it approaches the cylinder head. The...
4136520 Hydraulic pile driver  
A hydraulic pile driver of the kind having at least one hydraulic cylinder for raising a tup. An arrangement is proposed for allowing the use of oil as the hydraulic fluid. The cylinder has a...
4117764 Vibration attenuating device  
A vibration attenuating device to be used in conjunction with reciprocating-motion type impact mechanisms having working and stop members that are axially movable relative towards or away from one...
4088062 Fluid pressure operated impact mechanism  
A fluid pressure operated impact mechanism of the type having a reciprocating working member guided for movement along an axis toward and away from a stop member, a pressure chamber between the...
4084487 Pulse motor in a nut runner  
A non-impacting nut running pneumatic tool in which torque pulses are transmitted by an oscillating air motor through a one-way clutch and reduction gearing to the work. A torque responsive cam...
3983788 Method to minimize the amount of oil in the air exhausted from a pneumatically operated impact motor and an impact motor for carrying out this method  
An impact motor has a reciprocating piston that has its piston rod guided in bushings in the housing. The bushings are lubricated by oil-loaded compressed air but the piston is forced to...
3935789 Reversing valve  
An improved air reversing valve, as for use with a pneumatic scaler, chisel or the like, comprising throttling means between the two sides of the valve disc whereby the tool's performance...
3916982 Sound attenuating improvements for foundry molding machines  
Jolt foundry molding machines incorporating specially constructed jolt impact receiving surfaces and exhaust and valve systems which achieve the required jolt impact to make satisfactory foundry...
3913448 Hydraulic actuator  
A hydraulic actuator comprises a cylinder containing a double-acting piston, a port adjacent each end of the cylinder and a piston-controlled intermediate port opened by the piston in moving to an...
3910160 Uniflow steam engine  
A uniflow steam engine including a cylinder having a steam inlet valve in the cylinder head, a piston having a scavenge valve for transfer of steam from the pressure chamber between the piston and...
3881399 Steam engine with improve inlet valve arrangement  
A piston type steam engine expander of the high speed, variable speed type having a poppet steam inlet valve and cylinder outlet ports and operable over a wide speed range on a throttled steam...
3845691 ENGINE WITH RESILIENT PISTON  
An engine is provided in which a power-driven impactor is arranged to strike a resilient piston-like member, which is operatively connected to the crankshaft, so as to initiate each stroke of the...
3817335 AIRGUN REPEATER POWERED PILE DRIVER  
An airgun repeater powered pile driver embodying the present invention is capable of driving piles of various types and sizes including immense piles to be driven down into the earth and can be...
3703848 FLUID PRESSURE ENGINE  
This invention is an improved engine operated by gas under pressure having an improved valve guide, lubrication system, speed adjustment device, wrist pin, gas storage area, hollow crank shaft, and...
3696709 CONTROL DEVICE FOR A RECIPROCATING MACHINE  
A control device for distributing a source of compressed fluid to a chamber housing a reciprocating member, the device including a valve means connecting the source of compressed fluid to the...
3673921 PRESSURIZED FLUID DEVICE  
A portable pneumatic tool including an elongated housing having a rotatable output member supported thereon and adapted to have a wrench socket attached thereto. Lever means within the housing is...
3668974 RECIPROCATING ENGINE  
This invention relates to a reciprocating engine which operates with a compressible working medium like steam and has a cylinder and a cooperating cylinder head. A piston moves forward and backward...
3820442 VARIABLE CUT OFF INTAKE VALVE SYSTEM  
3605555 PNEUMATIC VIBRATION GENERATOR  
3397619 Steam engine inlet valve mechanism  
Matches 1 - 50 out of 71 1 2 >