FORM 2


THE PATENTS ACT, 1970 (39 of 1970)
As amended by the Patents (Amendment) Act, 2005
&
The Patents Rules, 2003
As amended by the Patents (Amendment) Rules, 2006
PROVISIONAL SPECIFICATION (See section 10 and rule 13)
TITLE OF THE INVENTION
Assembly fixture for pump motor assembly
APPLICANTS
Crompton Greaves Limited, CG House, Dr Annie Besant Road, Worli, Mumbai 400 030, Maharashtra, India, an Indian Company
Inventors
Sathe Mahesh Kashinath of Crompton Greaves Ltd, Industrial Design Centre, CG Global R&D Centre, Kanjur (E), Mumbai 400042, Maharashtra, India, Indian National
PREAMBLE TO THE DESCRIPTION
The following specification describes the invention


This invention relates to an assembly fixture for pump motor assembly.
The present pump motor assemblies normally carry casted or sheet metal feet bellow motor for erecting the motor on RCC OR PCC platform with rubber feet packing for taking care of vertical misalignments & gaps which may exist at the inlet and outlet piping flanges. This is nothing but a floating assembly of the pump motor on the RCC OR PCC rigid base with lot of bolting making the assembly of pump motor at site laborious. Similar floating assembly of capacitor is also common but the same use peripheral clamping without any rubber packing and definitely reduce the capacitor cooling marginally. Further in the present motor pump assemblies, motor fan cowls whether made of metal or non metal increase the assembly time and adds up a somewhat noisy component to the entire assembly. Single handle provided for lifting pump motor assembly which is on the motor casing normally with pump casting weight getting cantilevered makes the complete assembly fall down from pump side making the pump lifting bit unsafe. Gaskets used presently are seperate hard rubber components which are biodegradable and are possible to get misplaced.
An object of the invention is to provide a self clamping pump motor assembly which eliminates the motor end shield tie rods by providing snaps inbuilt into newly designed enclosure which reduces the assembly time and increases productivity and renders the assembly easy and convenient.
Another object of the invention is to provide a self clamping pump motor assembly which provides pump motor assembly holding and lifting style flexibility.
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Another object of the invention is to provide a self clamping pump motor assembly which reduces the packing box size resulting into cost reduction.
Another object of the invention is to provide a self clamping pump motor assembly which improves the looks of the products without disturbing present cooling and electrical regulations.
Another object of the invention is to provide a self clamping pump motor assembly which provides inbuilt motor cowl construction eliminating separate motor fan cowl resulting in cost reduction.
Another object of the invention is to provide a self clamping pump motor assembly which provides improved capacitor holding increasing effective cooling surface of capacitor can resulting in increased capacitor life.
According to the invention there is provided a self clamping pump motor assembly comprising an enclosure enclosing pump motor assembly formed of a molding carrying handle, motor fan cowl, pump inlet and outlet flanges gasket and means for holding motor start capacitor and other features protecting the motor and pump components.
In accordance to the present invention, an assembly fixture for pump motor assembly comprises an enclosure and a centrifugal pump & single phase electric motor located in the enclosure.
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In accordance to the present invention, the enclosure comprises a single molded body enclosing accommodating and holding motor casting and end shields together eliminating tie rods, normally used for clamping motor end shields with motor casing.
In accordance to the present invention, enclosure also provides seat for pump inlet and outlet flanges eliminating the normally used hard rubber gaskets.
In accordance to the present invention, enclosure also accommodates motor start capacitor and eliminates normally used separate handle.
In accordance to the present invention, enclosure eliminates the motor fan cowl i.e. metallic fan enclosure which is normally a separate part in pump motor assembly.
In accordance to the present invention, the enclosure apart from holding aforesaid components aids on assembly line avoiding motor & pump color damages and other delicate items of an assembly damages likely to occur during assembling name plates and other accessories and in case of mishandling.
In accordance to the present invention, the enclosure also reduces the packing box size since the pipe flanges modular to be fixed on the inlet and outlet pipeline need not be assembled with pump body as normally done presently and the same can be packed beneath or wheresoever the space is available inside the packing box.
In accordance to the present invention, capacitor holding designed is also unique since as compared to conventional peripheral clamps, the new design holds the capacitor at
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three points on periphery increasing its effective cooling surface and thus improving capacitor life.
In accordance to the present invention, the new design also provides flexibility in holding the pump while lifting the same or carrying it by having handle shape provision inbuilt into the enclosure at three locations.
Dated this 18th day of March 2009

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