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Class Information
Number: 417/312
Name: Pumps > With muffler acting on pump fluid
Description: Apparatus including means to attenuate sound created by operation of the pump, said means acting upon the pump fluid to accomplish the attenuation.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 5155876 |
Integrated sound baffle |
Oct. 20, 1992 |
| 5151018 |
Sound attenuation chamber |
Sep. 29, 1992 |
| 5139392 |
Multi-cylinder swash plate compressor discharge gas flow arrangement |
Aug. 18, 1992 |
| 5137432 |
Noise-preventative aquarium pump |
Aug. 11, 1992 |
| 5137439 |
Screw rotor machine with De Laval nozzle for noise reduction |
Aug. 11, 1992 |
| 5137433 |
Aquarium power head with integral muffler |
Aug. 11, 1992 |
| 5133647 |
Pulse damper |
Jul. 28, 1992 |
| 5129793 |
Suction muffler |
Jul. 14, 1992 |
| 5129792 |
Refrigerant compressor having gas pulsation suppression device |
Jul. 14, 1992 |
| 5123816 |
Compressor suction noise attenuator and assembly |
Jun. 23, 1992 |
| 5116207 |
U-shaped compressor reservoir |
May. 26, 1992 |
| 5112198 |
Refrigerant compressor having variable restriction pressure pulsation attenuator |
May. 12, 1992 |
| 5110266 |
Electric blower having improved return passage for discharged air flow |
May. 5, 1992 |
| RE33902 |
Compressor head and suction muffler for hermetic compressor |
Apr. 28, 1992 |
| 5092747 |
Fluid compressing apparatus having bearing gap |
Mar. 3, 1992 |
| 5084166 |
Fuel filtering device |
Jan. 28, 1992 |
| 5077981 |
Method and apparatus for acoustic attenuation in variable speed compressors |
Jan. 7, 1992 |
| 5067878 |
Discharge flow blocking valve for a hermetic rotary compressor |
Nov. 26, 1991 |
| 5059100 |
Discharge line restraint |
Oct. 22, 1991 |
| 5055010 |
Suction baffle for refrigeration compressor |
Oct. 8, 1991 |
| 5051069 |
Multi-cylinder refrigerant gas compressor with a muffling arrangement |
Sep. 24, 1991 |
| 5046935 |
Compressor with reduced vibrations |
Sep. 10, 1991 |
| 5040952 |
Scroll-type compressor |
Aug. 20, 1991 |
| 5022146 |
Twin rotary compressor with suction accumulator |
Jun. 11, 1991 |
| 5013221 |
Rotary fuel pump with pulse modulation |
May. 7, 1991 |
| 4990067 |
Hermetic compressor |
Feb. 5, 1991 |
| 4988269 |
Compressor discharge gas sound attenuation |
Jan. 29, 1991 |
| 4988268 |
Air compressor |
Jan. 29, 1991 |
| 4979879 |
Discharge system for rolling piston rotary compressor |
Dec. 25, 1990 |
| 4973230 |
Discharge system for hermetic compressor |
Nov. 27, 1990 |
| 4960368 |
Suction system for hermetic compressor of refrigeration |
Oct. 2, 1990 |
| 4950133 |
Air blower assembly |
Aug. 21, 1990 |
| 4948346 |
Fuel pump mount for reduction of vibration transmission |
Aug. 14, 1990 |
| 4938309 |
Built-in vacuum cleaning system with improved acoustic damping design |
Jul. 3, 1990 |
| 4930995 |
Device for reducing refrigerant gas pulsations in a compressor |
Jun. 5, 1990 |
| 4929157 |
Pulsation damper for air conditioning compressor |
May. 29, 1990 |
| 4925368 |
Turbo-compressor having air-cooled bearing |
May. 15, 1990 |
| 4911619 |
Suction system of hermetic refrigeration compressor |
Mar. 27, 1990 |
| 4907414 |
Refrigerant injection into oil for sound reduction |
Mar. 13, 1990 |
| 4904165 |
Muffler/check valve assembly for scroll compressor |
Feb. 27, 1990 |
| 4900234 |
Refrigerant injection into oil for sound reduction |
Feb. 13, 1990 |
| 4888003 |
Vacuum apparatus |
Dec. 19, 1989 |
| 4884956 |
Rotary compressor with clearance volumes to offset pulsations |
Dec. 5, 1989 |
| 4881879 |
Rotary compressor gas routing for muffler system |
Nov. 21, 1989 |
| 4874410 |
Vacuum producing apparatus |
Oct. 17, 1989 |
| 4863356 |
Multi-cylinder refrigerant gas compressor with a muffling arrangement |
Sep. 5, 1989 |
| 4844701 |
Mobile pump apparatus |
Jul. 4, 1989 |
| 4842492 |
Compressor discharge muffler having cover plate |
Jun. 27, 1989 |
| 4842491 |
Apparatus and method of determining compressor structural resonant frequency |
Jun. 27, 1989 |
| 4838769 |
High side scotch yoke compressor |
Jun. 13, 1989 |
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