Part-I - Controller General of Patents Designs and Trademarks

(12) PATENT APPLICATION PUBLICATION (21) Application No.130/CHE/2012 A
(19) INDIA
(22) Date of filing of Application :12/01/2012 (43) Publication Date : 21/06/2013
(54) Title of the invention : OIL-FREE LOW PRESSURE WATER VAPOR BLOWER
(51) International classification :F04D
(31) Priority Document No :13/251,582
(32) Priority Date :03/10/2011
(33) Name of priority country :U.S.A.
(86) International Application No
:NA
Filing Date
:NA
(87) International Publication No : NA
(61) Patent of Addition to Application Number :NA
Filing Date
:NA
(62) Divisional to Application Number
:NA
Filing Date
:NA
(71)Name of Applicant :
1)R&D Dynamics Corporation
Address of Applicant :49 West Dudley Town Road
Bloomfield Connecticut-06002
(72)Name of Inventor :
1)AGRAWAL Giridhari L.
2)BUCKLEY Charles W.
3)KNECHEL Jared
U.S.A.
(57) Abstract :
Abstract A high-speed single-stage motor-driven blower designed to move water vapor includes an axial flow compressor and a
rotating assembly supported by gas foil bearings and driven by a brushless permanent magnet synchronous motor utilizing a
remotely mounted variable frequency drive. The blower is immersed in a water vapor flow for operation. Accordingly the blower
comprises an outer blower housing and an inner blower housing defining an annular cavity therebetween wherein the inner
blower housing is held within the outer blower housing by seals and contains and protects the motor components and the bearings
against water damage and contamination. A cooling flow may be leaked through the inner blower housing to cool the internal
operational components of the blower and to capture heat therefrom which can be added to the water vapor flow moving through
the blower.
No. of Pages : 19 No. of Claims : 10
The Patent Office Journal 21/06/2013 13789