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4407390 |
Pneumatic motor
Reciprocating pneumatic motor for rock drills and the like wherein a freely-movable hammer piston repeatedly strikes the end of a drill rod, usually a rotating drill rod. Fluid under pressure...
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4402383 |
Drill motor enclosure
A drill motor rigid enclosure is provided for a rock drill motor. The drill motor is encompassed within the enclosure such that viration, torque, and thrust produced by the motor is isolated from...
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4375841 |
Fluid flow apparatus for accommodating a pressure drop
An apparatus is disclosed for receiving a high pressure fluid flow to accommodate a drop to a lower pressure fluid flow with attenuated noise, incorporating an initial diffuser stage followed by...
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4367807 |
Sound absorber for compressed-air operated apparatuses, in particular compressed air vibrators
The sound absorber includes a main body (1), a housing component (2) attached thereon and a cap (3) threaded onto the main body. The compressed air exiting from the compressed-air vibrator flows...
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4359134 |
Sound suppressor for fluid flow lines
A compact low-resistance muffler for reducing sound levels generated by the pulsatile flow of fluids as, for example, at the intake of a compressor or the exhaust port of an internal combustion...
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4346783 |
Apparatus for treating flowing working gases particularly to reduce the noise in operation thereof
A device for treating flowing working gases in order to reduce their operational noises and in most instances also to increase their operating efficiency comprises a flowing working gas operating...
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4324314 |
Muffler
A muffler assembly particularly adapted to silence the exhaust air from an air valve of an air system. The muffler is constructed so as to permit effective silencing without significantly...
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4320864 |
Muffler for fastener driving tool
A tool for driving fasteners includes a housing defining a handle portion and a nose portion. A driver is reciprocally mounted within the housing as is an assembly for driving the driver through a...
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4303131 |
Compressed-gas-operated reciprocating piston devices
A compressed-gas-operated reciprocating-piston device, e.g. a concrete breaker, rock drill or chipping hammer, has a cylinder component of composite construction, comprising a rigid inner metal...
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4303133 |
Compressed-gas-operated reciprocating-piston devices
A compressed-gas-operated reciprocating-piston device, e.g. a concrete breaker, rock drill or chipping hammer, has a cylinder component of composite construction, comprising a rigid inner metal...
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4299305 |
Apparatus for damping noise from exhaust air outlets
A sound absorber or silencor for sound from outlets of air or gas comprising a tube or flexible hose (2) which is connected to an outlet (1) of air or gas and which contains a sound absorbing body...
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4294330 |
Mufflers for percussive pneumatic machines
A muffler for use with machines such as pneumatic drills consists of an elastomeric housing divided into an admission chamber and a series of muffler chambers. Within the housing are an inlet...
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4274258 |
Dust-boot for a vacuum booster
A dust-boot for a vacuum booster, which is partly protruded into the driver's room, characterized in being provided with a noise preventing wall firmly formed in such a mode, that it covers the...
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4258798 |
Air passages for pneumatic tools
A tool handle construction incorporating a unitary inlet-exhaust assembly, allowing economies of construction.
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4243110 |
Pneumatic percussion drill with exhaust cooling and lubrication of chuck end
A pneumatic percussion rock drill includes a muffler casing surrounding the drill cylinder part and sealingly engaged with the drill housing so that exhaust air from the percussion motor flows...
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4227591 |
Muffler for air-powered nailers and the like
The present invention relates to a novel outlet air muffler for air-powered transportable driving tools such as nailers. The muffler includes an outlet air duct formed in a housing endpiece and the...
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4219100 |
Muffler for exhaust air or other gas
Exhaust air from an air tool or other air actuated device is directed into an air expansion chamber separated by slots from a second chamber containing a predetermined volume of small unconnected...
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4212370 |
Sound absorber for an intermittently discharged gaseous working medium
A sound absorber for intermittent exhaust gas, particularly for use in connection with a compressed air operated motor employed, for example, in a hand grinder. The sound absorber is arranged...
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4205732 |
Muffler for portable pneumatic tool
The invention relates to a muffler for portable pneumatic tools wherein the exhaust of the pneumatic motor is passed into an expansion chamber having a perforated outlet baffle biased to the...
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4161996 |
Exhaust muffler
An exhaust muffler intended for noise dampening of, for instance, pneumatic tools, comprising a variable flow restricting passage, an attenuation chamber and a non-variable flow restricting...
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4135602 |
Selectively positioned muffler
A muffler is integrally incorporated with a pneumatic tool by cooperating with the tool housing intermediate the air exhaust chamber for the air motor and atmosphere. An inwardly dished muffler...
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4134472 |
Combination muffler and air filter
A combination muffler and air filter, having a central tubular member with spaced longitudinally disposed elongated slots. A disposable canister on the central tubular member is removably held in...
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4127130 |
Air muffler
The air muffler is primarily designed to be carried by a snug fitting hood respirator adapted to fit over the head of a person and to dispense breathable air into the hood in a minimum quantity of...
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4113052 |
Unitary elastic muffler assembly for a pneumatic device
A unitary, elastic muffler assembly includes an arcuate, channel-shaped, sound-muffling section having opposite ends bridged by an integral elastic band. The assembly is telescoped over the tubular...
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4113049 |
Noise reduction device for impact tools
A noise reduction device for use with an impact tool which comprises a deformable block having a flat face and an opening therein for accepting the set of the tool, and a cylindrical housing...
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4113050 |
Fluid-flow noise reduction systems
An `in-line` unit for use in compressor station piping, arranged to reduce the level of noise generated when the blowdown valves of the station piping are opened in an emergency to vent the high...
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4109749 |
Muffler
A noise attenuator or muffler for a compressed air tube type heater is disclosed. The muffler exhaust air through exit apertures located about its periphery and due to its unique design...
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4108258 |
Rock drilling apparatus with noise reducing drill rod cover
A rock drilling apparatus has a noise reducing drill rod cover which comprises a pair of elongated strips, each of which, when in an extended condition in the longitudinal direction thereof, form...
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4093406 |
Fluid operated hydraulic pump including noise reduction means
A fluid operated hydraulic pump of the type using air pressure to produce high pressure hydraulic fluid wherein an air pressure driven motor and a hydraulic pump are positioned in adjacent axially...
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4093110 |
Noise and fouling reducer for powder-actuated tool
A chamber is formed on a powder-actuated tool into which the combustion gases generated by firing the tool are directed. The chamber contains a plurality of baffle plates which absorb noise and...
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4086984 |
Vibration damper for impact tool
A vibration damper for an impact tool comprises an envelope which surrounds a working part of the tool and thereby encloses a liquid-like material having damping properties.
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4082160 |
Silencer for exhausting gas streams
A silencer for reducing the noise of an exhausting gas stream, comprising a hollow body having a connector, a sound-absorbing insert in the body and an inner component, the sound-absorbing insert...
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4079809 |
Muffler for pneumatic drill
A muffler for a percussive drill is provided consisting of a casing of general prismatic shape adapted for mounting on the drill. An inlet is present in the casing for receiving exhaust from the...
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4068987 |
Pneumatic motor with muffled exhaust
In a pneumatic motor that includes a vaned rotor, a rotor chamber having a gas inlet and gas outlet means, a housing and an axially extending rotor shaft to rotate in said chamber, structure to...
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4068742 |
Vibration damper for impact tool
An impact tool has a vibration damper which vibration damper comprises an envelope which surrounds a working part of the tool and thereby encloses a liquid-like material having damping properties....
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4042062 |
Air pulse noise damper for a pneumatic tool
A pneumatic tool having an exhaust air noise attenuating system in which air exhausting from a rotary air vane motor is caused to pass in order through an exhaust port, past a flexible leaf damper...
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4033428 |
Muffler for intermittent blasts of air from pneumatic tools, valves and the like
A muffler for pneumatic tools in which the lubricating oil from mist lubrication and the like is separated from the used air by means of the air first being led through a porous filler and...
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4030553 |
Percussion tool with noise reducing characteristics and method of making
A method of modifying a percussion tool to provide noise reduction, and a percussion tool having effective noise damping characteristics. In the method of the present invention, a troublesome noise...
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4018291 |
Pneumatic hammer
An air hammer having a main body including an elongated cavity with a ram slidably mounted therein. The ram is driven by compressed air delivered through inlet means to the cavity in such a way as...
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4010819 |
Arrangement for muffling the exhaust of a pneumatic rock drilling machine
An elastomer muffler for the exhaust of a pneumatic percussive tool, which comprises an outer and an inner side wall. The cross-sections of the side walls are C-shaped and the side walls are...
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3999624 |
Acoustical attenuating device
A pneumatic muffler providing within the cavity formed by its conical-like shell a proportionate expansion chamber in immediate communication with an exhaust port and an integrally related...
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3995712 |
Muffler
A muffler for exhaust systems of internal combustion engines, pneumatic tools and the like, in which at least two parallel conduction channels are provided each having a conducting device for...
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3993159 |
Muffler for a governed pneumatic tool
A muffler for reducing the noise level of the air exhaust from a governed pneumatic tool. Exhaust ports in the tool housing communicate with the interior cavity of a muffler body having selectively...
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3981378 |
Muffler for pile driving apparatus
A muffler system for attenuating exhaust noise from pile driving apparatus including an exhaust passage therein having perforated straight sections and unperforated curved sections. The exhaust...
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3981377 |
Exhaust muffler for pneumatic tool or machine
An exhaust passageway is provided with a sound muffler comprising an orifice, and means operable against a spring in response to sudden increase of fluid exhaust pressure for relatively restricting...
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3975918 |
Piledriving
Noise radiated into the atmosphere from a pile during pile-driving is inhibited by a tubular cover of flexible material having internal dimensions sufficient to pass, with an intervening air space,...
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3965992 |
Internally silenced impact driven tools and impacting means therefor
Impact driven tools of the type generally comprising a bitter end bounded by a collar and a shank and a tip are provided with internal silencing means comprising an opening in the bitter end, said...
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3964888 |
Vacuum sweeper
A vacuum sweeper, particularly for collecting borings, has an upright cylindrical receptacle with a tangential inlet for admission of an air stream which carries borings and/or other solids and an...
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3949828 |
Fluid exhaust silencer
A fluid exhaust silencer is disclosed which comprises a hollow, cylindrical, fluid-permeable noise-reducing element made of a wire mesh material. The noise-reducing element is mounted in a housing...
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3949944 |
Air powered rotary wire cutting and wrapping tool
A tool for cutting a wire to length and then wrapping it around a terminal post includes an air motor driving through a planetary gear reduction to rotate a spindle, and a wire contacting bit...
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