Patent application number | Description | Published |
20090110583 | Rotary blower with super-charged injection cooling - This invention involves a rotary blower with super-charged injection cooling having multiple interconnected and synchronized parallel multi-lobe rotors with the same number of lobes for propelling flow from a suction port to a discharge port of an inner casing without using internal compression. The embodiments incorporate manifolds near the blower discharge port acting as super-charging inlet port injecting air at the elevated pressure over the blower discharge pressure to cool the impellers and internal casing. The cooling air supply could be piped from an external compressed air source or could be generated by one or more fans mounted on the rotors own shafts. | 04-30-2009 |
20090142212 | Rotary blower with noise abatement jacket enclosure - A rotary blower with noise abatement jacket enclosure having multiple interconnected and synchronized parallel multi-lobe rotors with the same number of lobes for propelling flow from a suction port to a discharge port of an inner casing without internal compression. The noise abatement jacket enclosure is shaped to surround the blower and to conform generally to its body contours, but is oversized to provide adequate cooling spaces with outer skin of the blower. It comprises a forced air cooling jacket comprising an inner and outer cover, a sound absorbent layer comprising an inner and outer surface, the inner surface in contact with the blower outer cooling cover, and a sound barrier layer comprising an inner surface in contact with the outer surface of the sound absorbent layer. | 06-04-2009 |
20090191083 | Rotary blower with isothermal air jacket - A rotary blower with an isothermal air jacket having multiple interconnected and synchronized parallel multi-lobe rotors with the same number of lobes for propelling flow from a suction port to a discharge port of an inner casing without internal compression. The isothermal air jacket is shaped to surround the blower outer body, but is oversized to provide adequate flow spaces with outer skin of the blower to enable an effective cooling of the outlet casing and an effective heating of the inlet casing so that the whole casing temperature will tend to be more uniform and isothermal, resulting in a blower with less vibration, lower noise and longer blower life. | 07-30-2009 |
20110300014 | ROTARY LOBE BLOWER (PUMP) OR VACUUM PUMP WITH A SHUNT PULSATION TRAP - A shunt pulsation trap for a rotary lobe blower (pump) or vacuum pump reduces pulsation, NVH and improves efficiency without increasing overall size of the blower or pump. Generally, a rotary lobe blower (pump) or vacuum pump with the shunt pulsation trap has a pair of interconnected and synchronized parallel multi-lobe rotors housed in a transfer chamber with the same number of lobes for propelling flow from a suction port to a discharge port of the transfer chamber without internal compression. The shunt pulsation trap comprises an inner casing as an integral part of the transfer chamber, and an outer casing oversized surrounding the inner casing, therein housed various pulsation dampening means or pulsation energy recovery means or pulsation containment means, at least one injection port (trap inlet) branching off from the transfer chamber into the pulsation trap chamber and at least one feedback port (trap outlet) communicating with the blower outlet pressure. | 12-08-2011 |
20120020824 | ROOTS SUPERCHARGER WITH A SHUNT PULSATION TRAP - A shunt pulsation trap for a Roots supercharger reduces pulsation, NVH and improves efficiency without significantly increasing overall size of the supercharger. Generally, a Roots supercharger with the shunt pulsation trap has a pair of interconnected and synchronized parallel multi-helical-lobe rotors housed in a transfer chamber with the same number of lobes for propelling flow from a suction port to a discharge port of the transfer chamber without internal compression. The shunt pulsation trap comprises an inner casing as an integral part of the transfer chamber, and an outer casing oversized surrounding the inner casing, therein housed various pulsation dampening means or pulsation energy recovery means or pulsation containment means, at least one injection port (trap inlet) branching off from the transfer chamber into the pulsation trap chamber and a feedback region (trap outlet) communicating with the supercharger outlet pressure. | 01-26-2012 |
20120171069 | SCREW COMPRESSOR WITH A SHUNT PULSATION TRAP - A shunt pulsation trap for a screw compressor reduces gas pulsation, NVH and improves off-design efficiency without using a traditional serial pulsation dampener and a sliding valve. Generally, a screw compressor with the shunt pulsation trap has a pair of multi-helical-lobe rotors housed in a compressor chamber for propelling gas flow from a suction port to a discharge port of the compressor chamber with internal compression. The shunt pulsation trap comprises an inner casing as an integral part of the compressor chamber, and an outer casing oversized surrounding the inner casing, therein housed various gas pulsation dampening means or gas pulsation energy recovery means or gas pulsation containment means, at least one injection port (trap inlet) branching off from the compressor chamber into the pulsation trap chamber and a feedback region (trap outlet) communicating with the compressor outlet. | 07-05-2012 |
20120237378 | SHUNT PULSATION TRAP FOR CYCLIC POSITIVE DISPLACEMENT (PD) COMPRESSORS - A shunt pulsation trap for a cyclic positive displacement (PD) compressor reduces gas pulsation, NVH and improves off-design efficiency without using a traditional serial pulsation dampener and a variable geometry. Generally, a shunt pulsation trap for a cyclic PD compressor is configured to trap and attenuate gas pulsations before discharge and comprises a housing structure having a flow suction port, a flow discharge port, a compressor cavity and a pulsation trap chamber adjacent to the PD compressor cavity, therein housed various pulsation dampening means or pulsation energy recovery means or pulsation containment means, at least one injection port (trap inlet) branching off from the PD compressor cavity into the pulsation trap chamber and a feedback region (trap outlet) communicating with the PD compressor outlet. The associated principles, methods and embodiments are disclosed. | 09-20-2012 |
20130247849 | SHUNT PULSATION TRAP FOR POSITIVE DISPLACEMENT (PD) INTERNAL COMBUSTION ENGINES (ICE) - A shunt pulsation trap for a positive displacement (PD) internal combustion engine (ICE) reduces pulsation, noise, vibration and harshness (NVH), and overall size of the exhaust system and improves cycle (fuel) efficiency. Generally, a shunt pulsation trap for a PD-ICE is configured to trap and attenuate gas pulsations before discharge to engine outlet and comprises a chamber (trap volume) adjacent to the PD-ICE cavity, therein housed various pulsation dampening means or pulsation containment means, at least one relief port (trap inlet) branching off from the PD-ICE cavity into the pulsation trap chamber and a feedback region (trap outlet) communicating with the PD-ICE outlet. The associated principles, methods and embodiments are disclosed. | 09-26-2013 |