Home | Links | Contact Us | More About Intellectual Property | Bookmark

Search patents:

Home

Metal Working

Catalytic-converter-with-metallic-carrier-and-method-for-producing-same

Damper valve

What is claimed is: 1. In an elongated gas flow conducting means including valved aperture means ...

Residential waste water disposal system

The invention lies in the field of systems for the disposal of waste waters generated within a ...

Pipe closure apparatus

OF THE ILLUSTRATED EMBODIMENT The illustrated embodiment utilizes four jaws which are mounted on ...

Power tongs

A power tong is provided in accordance with the present invention which includes a frame having a ...

Rotary tong incorporating interchangeable jaws for drill pipe and casing

We claim: 1. In a power tong, the combination of: a housing; a generally annular rotor carried by ...

Cylinder gripping apparatus

OF A PREFERRED EMBODIMENT OF THE INVENTION Turning now to the drawings in FIG. 20, there is ...

Power tong

In accordance with the present invention there is provided a novel power pipe tong having a pipe-...

Power tongs with improved hydraulic drive

A power tong is provided employing improved hydraulic circuitry for operating a three-speed tandem ...

New and improved ratchet tool with rotatable rotor lock and rigid shifter finger

A ratchet handle embodying the principals of this invention is broadly designated in FIG. 1 of the ...

Back-up power tongs and method

Referring now to FIG. 1, there may be seen a simplified pictorial side view of apparatus embodying ...

Catalytic converter with metallic carrier and method for producing same

Details

Inventors: Nishizawa, Kimiyoshi; Yamada, Takashi; Ehara, Hideharu;
Assignee: Nissan Motor Co., Ltd. (Yokohama, JP)
Primary Examiner: Hart; Douglas
Assistant Examiner:
Attorney, Agent or Firm: Foley & Lardner

A catalytic converter for purifying exhaust gas from an automotive vehicle engine. The catalytic converter is composed of a metallic carrier for catalyst metal, disposed inside a casing. The metallic carrier is constructed of a main sheet metal structure which is formed by turning up an elongate flat sheet metal in a zigzag manner in cross-section, so that the main sheet metal structure has a plurality of parallel flat portions. The adjacent flat portions define therebetween a space. The main sheet metal structure is coated over all of its surfaces with an electrically insulative alumina layer. A plurality of corrugated sheet metal spacers are disposed and secured in the respective spaces thereby to define fine gas passages through which exhaust gas flows. Thus, the main sheet metal structure is electrically insulated from the corrugated sheet metal spacers, so that electric current is passed only through the main sheet metal structure. The main sheet metal structure serves as a heater element for promoting activation of the catalyst metal.

DETAILED DESCRIPTION It is an object of the present invention to provide an improved catalytic converter including a metallic carrier which serves also as an effective heater element for promoting activation of catalyst metal carried on the metallic carrier.
Another object of the present invention is to provide an improved catalytic converter including a metallic carrier having a sheet metal which is sufficiently high in resistance so as to serve as an effective heater element.
A further object of the present invention is to provide an improved catalytic converter including a metallic carrier which has electrically insulating layers, in which electrically insulating materials are effectively prevented from peeling off from the electrically insulating layers.
An aspect of the present invention resides in a catalytic converter composed of a monolithic metallic carrier for catalyst metal, disposed in a casing.
The metallic carrier includes a main sheet metal structure formed by successively turning up an elongate sheet metal a plurality of times in opposite directions.
The main sheet metal structure is generally zigzag in cross-section and has a plurality of generally flat portions which are generally parallel with each other so that the adjacent two generally flat portions are separate from each other by a predetermined distance and define therebetween a space.
The main sheet metal structure has first and second end portions which respectively correspond to opposite end portions of the elongate sheet metal.
The first and second end portions serve as electric terminals, respectively.
An electrically insulative layer is formed on a surface of the main sheet metal structure.
Additionally, a plurality of heat resistant corrugated spacers are provided so that each corrugated spacer is disposed in the space and in contact with the adjacent generally flat portions to define a plurality of fine gas passages between each corrugated spacer and each generally flat portion of the main sheet metal structure

Related patents

	Core for an electrically heatable catalytic converter OF THE INVENTION As indicated above, the present invention is a novel arrangement and structure for a core useful in an electrically heatable catalytic converter. In ...
	Catalytic converter with electrically resistive catalyst support It is therefore an object of the present invention to provide a catalyst support which has a substantially high electrical resistance without using the electrically ...
	Heated cellular structures According to the practice of this invention, a honeycomb structure or body of electrically conductive material, which is preheated by electrodes, is used to remove ...
	Pipette puller The pipette puller of the invention is designed to meet all pipette, multi-barrel pipette, patch and extracellular needs. The pipette puller of the invention ...
	Electrically heatable catalytic converter An object of the present invention is to provide an electrically heatable catalytic converter having a sufficient durability, particularly to thermal stress. Another ...
	Ozone generator My invention includes many examples of dielectric spacer and flow impeding materials that can be disposed or arrayed in a corona discharge gap in an ozone generator. B...
	Cuvette In general, the present invention consists of a cuvette for use in chemical analysis, the cuvette having a main body with a central bore to permit mounting for rotation ...
	Rocker lever solenoid valve A solenoid valve which can be used to control a pneumatic cylinder has a magnet head 1 which lies, with the interposition of a separating foil 2, with one side against ...
	Method and apparatus for connecting and disconnecting tubular members It is a primary feature of the present invention to provide a novel power energized mechanism for making up and breaking out threaded pipe connections wherein pipe ...
	Punch with removable blade Having described my invention, I claim: 1. A punch for cutting an elongated slug from a sheet of material, comprising: a body having a first opening, and a second ...

0.254
Archive: All patents - Links Copyright (c)2006 Eipa-patents.org - All rights reserved