Title of Invention

IMPROVED SWITCH EXPANSION JOINT FOR RAIL TRACK.

Abstract AN IMPROVED SWITCH EXPANSION JOINT FOR RAIL TRACK COMPRISING A PAIROF MACHINED SEGMENTS OF TWO NON-BENT RUNNING RAILS (1) AND MOUNTED WITH A GAP BETWEEN THE JUXTAPOSED RAIL HEADS AND A GAP AVOIDING RAIL (2) OF PRE-DETERMINED LENGTH ACCOMMODATED IN THE SAID MACHINED SEGMENTS PARALLEL TO AND ADJACENT TO THE NON-BENT STRAIGHT LENGTH OF THE RUNNING RAILS (1) CHARACTERIZED BY THE IMPROVEMENTS WHEREIN, THE OPPOSING RAIL HEADS OF THE TWO RUNNING RAILS ARE TAPERED DOWNWARDLY TOWARDS THE GAP (G) THEREBY FORMING A RAIL TABLE (RT2) AT THE GAP LOWER IN HEIGHT THAN THE RAIL TABLE (RT1) PROVIDED BY THE GAP AVOIDING RAIL (2) AT THE PORTION OF THE GAP (G) AND WHEREIN THE TAPER GRADUALLY DECREASE AND THE RAIL TABLE IS IN LEVEL TO THE USUAL RAIL TABLE OF THE RUNNING RAIL, AT A SHORT DISTANCE FROM THE SAID GAP.
Full Text

Documents:

575-CAL-1998-(11-10-2012)-CORRESPONDENCE.pdf

575-CAL-1998-(11-10-2012)-OTHERS.pdf

575-cal-1998-granted-abstract.pdf

575-cal-1998-granted-claims.pdf

575-cal-1998-granted-correspondence.pdf

575-cal-1998-granted-description (complete).pdf

575-cal-1998-granted-drawings.pdf

575-cal-1998-granted-examination report.pdf

575-cal-1998-granted-form 1.pdf

575-cal-1998-granted-form 13.pdf

575-cal-1998-granted-form 18.pdf

575-cal-1998-granted-form 2.pdf

575-cal-1998-granted-form 3.pdf

575-cal-1998-granted-form 6.pdf

575-cal-1998-granted-gpa.pdf

575-cal-1998-granted-letter patent.pdf

575-cal-1998-granted-pa.pdf

575-cal-1998-granted-specification.pdf


Patent Number 211067
Indian Patent Application Number 575/CAL/1998
PG Journal Number 42/2007
Publication Date 19-Oct-2007
Grant Date 16-Oct-2007
Date of Filing 03-Apr-1998
Name of Patentee RAMCHANDER HEERALALL LIMITED
Applicant Address 138 BIPLABI RASH BEHARI BASU ROAD, CALCUTTA 700001.
Inventors:
# Inventor's Name Inventor's Address
1 PAWAN KHAITAN C/O. RAMCHANDER HEERALALL LIMITED, 138 BIPLABI RASH BEHARI BASU ROAD, CALCUTTA 700 001.
PCT International Classification Number E01B 5/00
PCT International Application Number N/A
PCT International Filing date
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 NA