Ceramic recuperative heat exchangers and a method for producing the same

Patent 4421702 Issued on December 20, 1983. Estimated Expiration Date:

March 16, 2001. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

2235291

Method of manufacturing an open cellular article
Patent #: 3940301
Issued on: 02/24/1976
Inventor: Straw , et al.

Ceramic cellular structure having high cell density and catalyst layer
Patent #: 4025462
Issued on: 05/24/1977
Inventor: Cleveland

Recuperator structures and method of making same
Patent #: 4066120
Issued on: 01/03/1978
Inventor: Mold , et al.

Method of manufacturing a ceramic unit for indirect heat exchange and a heat exchanger unit obtained thereby Patent #: 4271110
Issued on: 06/02/1981
Inventor: Minjolle

Inventors

Assignee

NGK Insulators, Ltd.

Application

No. 06/243698 filed on 03/16/1981

US Classes:

264/631, From cordierite (i.e., 2MgO.2A12O3.5SiO2, iolite)264/209.8, Providing special flow channel feature (e.g., varying dimension of flow channel or varying direction of flow of material in the extruder, etc.)264/630, Producing honeycomb shape428/116Honeycomb-like

Examiners

Primary: Parrish, John A.

Attorney, Agent or Firm

Parkhurst & Oliff

International Classes

F28F 21/04 (20060101)
F28F 21/00 (20060101)
F28F 7/02 (20060101)
F28F 7/00 (20060101)

Foreign Application Priority Data

1980-03-24 JP

Abstract

Ceramic honeycomb type recuperative heat exchangers having a large number of parallel channels formed of partition walls are disclosed, in which fluids to be heat-exchanged are passed through respective channels that are produced by extruding a ceramic raw batch material into a honeycomb structural body, drying the shaped honeycomb structural body, prior to or after firing step cutting off partition walls in the given rows of the honeycomb structural body in the axial direction of the channels to a given depth from the end surface of the honeycomb structural body and sealing only the end surfaces of said rows.