The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 13, 1997
Filed:
Aug. 12, 1996
William S Dalton, Chesterfield, MA (US);
James J Kosiba, South Hadley, MA (US);
K Scott Trunkett, Springfield, MA (US);
Demag Delavel Turbomachinery Corp. TurboCare Division, Chicopee, MA (US);
Abstract
In a steam turbine having a main inlet pipe which introduces steam to a nozzle chamber through the turbine casings and a bell seal assembly for sealing the inlet pipe relative to the casings and the nozzle chamber, the bell seal assembly including a bell seal disposed in the nozzle chamber, and a retainer nut sleeved by the bell seal and threadedly engaged in the inlet pipe, the improvement which comprises: the bell seal being replaced by a ring carrier, a stack of inner and outer sealing rings loosely sleeved on the ring carrier, the material of the inner rings having a lower coefficient of thermal expansion than the material of the ring carrier and the outer rings being made from a material having a higher coefficient of thermal expansion than the material of the nozzle chamber.