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5692883 |
Compact electro-hydraulic unit
A compact electro-hydraulic unit in which an electric motor drives an hydraulic pump having pinions and a pump body, with a cavity containing the pinions, the pump body comprising sound wave...
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5672052 |
Blower muffling apparatus
A blower muffling apparatus includes a blower chamber for housing a blower therein, an exhaust chamber positioned adjacent the blower body side of a blower disposed in the blower chamber,...
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5669762 |
Sound and pulsation reducing outlet chamber for an air compressor
An air chamber structure for a medical air compressor, the chamber being provided between the pump and an air bed. Two flow guiding stubs are provided at an air input end to scatter air and render...
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5667367 |
Air compressor
An air compressor includes a compressor unit, an intake regulator valve connected to the compressor unit, and intake filter connected to the intake regulator valve, an oil separator connected to...
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5645405 |
Reciprocating type compressor with muffling chambers
A reciprocating type compressor such as a swash plate type compressor includes single headed pistons movably arranged in the cylinder bores formed in the cylinder block. The cylinder block has an...
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5641949 |
Method and apparatus for coupling a cylinder head--suction muffler assembly in a compressor
The present invention describes an improved cylinder head-suction muffler assembly which minimizes the fabrication and installation process of the same. The improved cylinder head-suction muffler...
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5634776 |
Low noise hydraulic pump with check valve timing device
A low noise hydraulic pump is disclosed which can be an piston pump or a vane pump, including a flow generation assembly with at least one pumping chamber for creating positive displacement of...
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5613842 |
Hermetically sealed motor compressor unit with a spring biased muffler
A sealed motor-compressor unit having a suction side muffler directly attached to the cylinder head by a niche in the cylinder head which receives the muffler. A "U" shaped spring has two legs...
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5605447 |
Noise reduction in a hermetic rotary compressor
The present invention concerns a noise reduction method and a noise reduction device for a hermetic rotary compressor. It is designed to reduce the very high level of low frequency sound generated...
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5596879 |
Method for determining optimum placement of refrigerant line muffler
A method for determining the optimum location for installing a muffler in a refrigerant line to reduce refrigerant line vibration caused by acoustical resonances. This method includes measuring the...
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5595476 |
Pump shaft driven inlet and outlet radial pin arrangement for reducing fluid ripple
An apparatus for reducing ripple in the flow of a fluid through a positive displacement pump comprises an inlet tube in fluid communication with an inlet of the pump and an outlet tube in fluid...
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5593285 |
Hydraulic axial piston unit with multiple valve plates
An axial piston hydraulic unit has a valve plate assembly positioned between a head and a rotatable cylinder barrel. The assembly includes a pair of valve plates stacked together to function as a...
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5591015 |
Constructional unit consisting of a hydraulic machine (hydraulic pump or hydraulic motor) and a support
A constructional unit comprising a hydraulic machine having a drive or driven shaft and of a support by which the hydraulic machine is held with the interposition of material which deadens...
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5588810 |
Low noise refrigerant compressor
A sound barrier cover for a compressor unit which has a housing provided by a substantially continuous wall which provided with a plurality of access ports therethrough. The barrier cover has first...
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5584674 |
Noise attenuator of compressor
A noise attenuator for a refrigerant-circulating compressor includes a casing whose interior space is divided into first and second chambers. The first chamber has an inlet for receiving...
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5583325 |
Muffler with integral check valve
An unbiased valve is located within a muffler. The valve is positioned by the pressure differential across the valve and is either in the full open or full closed position. A pressure equalization...
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5577898 |
Suction muffler arrangement for a hermetic reciprocating compressor
A structurally improved reciprocating compressor is disclosed. The compressor has a base muffler which acts not only as a refrigerant suction pipe and gasket but also as an arrangement for...
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5567127 |
Low noise air blower
An air blower including a flow-thru motor and fan unit encapsulated in resilient foam rubber layer within a substantially cylindrical plastic casing is provided which operates very quietly,...
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5564910 |
Rotary compressor having muffler with gas discharge outlets
The present invention relates to a motor-driven rotary compressor provided with a muffler. The muffler is provided with gas discharge outlets which are inclined so that the gaseous discharge...
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5556260 |
Multiple-cylinder piston type refrigerant compressor
A multiple-cylinder piston type compressor is disclosed. The compressor has a cylinder head fastened to the rear end of a cylinder block assembly of the compressor with a valve plate interposed...
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5556265 |
Multi-piston type refrigerant compressor with means for damping suction and discharge gas pulsation
A multi-piston type refrigerant compressor having a cylinder block unit in which a plurality of cylinder bores receiving a plurality of reciprocating pistons for sucking a refrigerant gas,...
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5549454 |
High speed vacuum pump with reduced exhaust noise
A vacuum pump comprises a casing body (11,12) having a cylinder liner (16) therein which defines a primary exhaust passage between the outer wall of the liner and the inner wall of the body. The...
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5542824 |
Refrigerant compressor having interconnected muffler section
A compressor includes a motor for reciprocating a piston which sucks-in refrigerant through an inlet, and discharges compressed refrigerant through an outlet. A cylinder head forms a discharge...
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5538404 |
Compressor unit shell construction
A shell for a hermetic compressor unit, the shell having a top section or dome, and a bottom section, the dome having a unique shape which gives enhanced capacity for absorbing and attenuating...
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5533869 |
Power tool exhaust cooling system
A housing for a power tool has an integral molded air channel or duct. The air channel surrounds the flywheel rotor of the power tool engine. The air channel is able to capture air pushed by the...
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5533870 |
Piston type compressor
A housing has a refrigerant gas suction chamber at its center portion and a refrigerant gas discharge chamber at its peripheral portion. A valve plate between a cylinder block and a housing has a...
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5520519 |
Performance enhancing base for small compressor
A base attachment for use with an air compressor having a motor enclosed within a housing, a compressor unit operatively connected to the motor and emitting compressed air from an air outlet, the...
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5507159 |
Suction accumulator vibration damper
A suction accumulator assembly in which a flexible resiliently yieldable support is attached between the accumulator casing and an internal suction tube to allow the suction tube to move relative...
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5507627 |
Oscillating-plate type compressor having holes in an outside area of a bolt lacing portion of a baffle plate
An oscillating-plate type compressor has five cylinder bores 6 formed in a cylinder block 1. Coolant gas compressed in the cylinder bores is discharged to a discharge chamber 12 through discharge...
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5507151 |
Noise reduction in screw compressor-based refrigeration systems
Noise reduction in a screw compressor based refrigeration system is achieved by the use of multiple compressor discharge and/or suction lines. The lines are configured and/or fabricated from...
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5499908 |
Method of making foam in an energy efficient compressor
An energy efficient hermetic compressor for compressing hydrofluorocarbon refrigerants. The compressor includes a motor compressor unit with a rotating oil pickup tube to which an oil paddle is...
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5496156 |
Suction muffler
A hermetic compressor including a suction muffler disposed opposite the suction inlet tube. A funnelled or countersunk inlet port on the muffler permits semi-direct refrigerant flow into the...
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5495711 |
Tuner hose assembly for power steering system
A tuner hose assembly for a motor vehicle power steering system including a flexible hose, a first flexible tuner tube inside the flexible hose having an upstream end connected to a pump, and a...
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5492451 |
Apparatus and method for attenuation of fluid-borne noise
In many hydraulic systems, fluid-borne noise is generated during operation due to the effects of the hydraulic pump. This fluid-borne noise is then transmitted to the hydraulic valves, hydraulic...
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5487648 |
Shell configuration for a hermetic compressor
A hermetic motor compressor comprising a shell formed by an upper and a lower cap connected one to the other in such a way that an airtight closure is obtained in the shell, and by feet fixed to...
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5452991 |
Hermetic compressor with pressure pulsation reducing mechanism for refrigerant
A hermetic compressor includes a sealed casing which accommodates therein a compressing unit for compressing a refrigerant and a driving unit for driving the compressing unit. A communication...
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5451727 |
Noise suppressing apparatus for hermetic reciprocating compressor
A noise suppressing apparatus for a hermetic reciprocating compressor. A soundproof chamber is provided at a lower shell. A suction pipe passes through the soundproof chamber and is divided into...
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5443371 |
Noise damper for hermetic compressors
A noise suppressor for hermetic compressors comprises a one piece elongate damper element twisted in the form of a helix, with adjustable pitch for the noise frequency band that one wishes to damp....
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5435700 |
Refrigerant suction and discharge apparatus for a hermetic compressor
A refrigerant suction and discharge apparatus for a hermetic compressor includes a suction pipe drawing refrigerant from the exterior of the hermetic compressor, a suction muffler having a hollow...
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5435699 |
Accumulator for air conditioning system
An accumulator for an automotive air conditioning system having a mechanism for attenuating fluid pressure pulsations and resultant noise from the air conditioning compressor is disclosed. The...
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5427506 |
Compressor pressure relief assembly
A compressor assembly is disclosed including a compressor mechanism mounted within a hermetically sealed housing. A cylinder block assembly, containing a plurality of reciprocating pistons within...
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5411376 |
Fuel pump with noise suppression
A gear rotor fuel pump having a gear rotor pump assembly received on a cantilever bearing in an end cap of the pump and an armature journalled for rotation at one end in the bearing while being...
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5407330 |
Air pump apparatus with vibration and sound reducing housing means
Portable, low noise air pump apparatus employing an inexpensive lightweight pump and motor unit, which pumps a pulsed noisy output into a plenum chamber inside a rubber impervious sub-housing which...
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5399817 |
Muffler
A muffler arrangement includes a muffler with an essentially cylindrical housing having a face end with a central entrance opening and at least one exit opening arranged other than centrally on the...
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5365633 |
Vacuum cleaner
A vacuum cleaner including an electric blower disposed inside a generally cylindrical rigid blower casing positioned inside the vacuum cleaner body. The blower casing has a lining of sound...
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5364236 |
Pulse damper
Improved pulse dampers are received within compressor housings. This is an improvement over prior art systems which topically attached a pulse damper outwardly of the compressor housing. The...
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5346371 |
Hydraulic elevator oil tank
An elevator hydraulic tank is provided with shaped sides which increase the rigidity and heat dissipating ability of the tank. The shaped sides of the tank may be corrugated. A hydraulic machine is...
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5344289 |
Deflection system for alien particles in a refrigeration motor compressor
A muffler system for a refrigeration motor-compressor comprising an upper and lower case, a compressor formed by a motor and by a body in which a muffler is fixed, a tube fixed to the lower case...
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5341654 |
Suction gas conduit
A refrigeration compressor incorporating an improved suction muffler is disclosed. The suction muffler provides dual sound attenuating chambers within a single housing, which housing is secured to...
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5339652 |
Sound and vibration absorbing damper
A hermetic compressor including a vibration damper situated around the outside of the compressor housing. The vibration damper is constructed from a length of wire wrapped around the housing to...
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