Ngk Insulators, Inc.

Nkg Insulators, Ltd.

Yasuo Akitsu

Yoshiaki Hori

Hideyuki Masaki

Kuniharu Kondo

Osamu Kyo

Hiroyuki Okahara

A control system for a dust collecting apparatus including an upright housing arranged above a dust storage bin, a ceramic filter assembly disposed within the housing to collect dust particles from exhaust gases supplied into a bottoms portion of the housing located upstream thereof, and a reverse washing mechanism mounted on the housing downstream of the filter assembly to cause the collected dust particles to fall into the dust storage bin from the filter assembly when it is activated, wherein temperature (T1) and pressure (P1) of the exhaust gases supplied into the housing upstream of the filter assembly, temperature (T2) and pressure (P2) of purified gases discharged from the filter assembly into an upper portion of the housing located downstream of the filter assembly and a flow quantity (Q1) of the purified gases discharged from the housing downstream of the reverse washing mechanism are detected to calculate an average temperature T=f(T1, T2), a flow quantity �(Q=f(Q1. T)!, viscosity (.eta.=f(T) and a pressure loss coefficient K=f(.DELTA.P, Q, .eta.) of the exhaust gases passing through the filter assembly, and wherein the reverse washing mechanism is activated under control of an electronic controller when the calculated pressure loss coefficient (K) becomes more than a predetermined value (K0) and is deactivated when the calculated pressure loss coefficient becomes less than the predetermined value (K0).

Control system for reverse washing mechanism in dust collecting apparatus

A support construction for a ceramic filter element adapted for use in a dust collecting apparatus, wherein the ceramic filter element is mounted within a tubular support housing which is formed at its inner periphery with an inward flange enclosing an outer periphery of the filter element. The filter element has one end portion formed at its outer periphery with an outward flange which is coupled with the internal wall surface of the support housing through an encircling sealing member and engaged at one side thereof with the inward flange of the support housing. A pressure plate in the form of a window frame is coupled within one end portion of the support housing and pressed to the outward flange of the filter element such that the outward flange of the filter element is clamped by the pressure plate and the inward flange of the support housing.

Support construction of filter element in dust collecting apparatus

A dust collecting apparatus, including a housing having an inlet duct, a discharge duct and filter provided therein. The filter has a honeycomb cellular structure including an inlet, outlet and a plurality of thin partition walls forming a plurality of axial passages. The filter has two groups of passages, a first group of passages that are closed along the inlet end of the filter and second group of passages that are closed along the outlet end of the filter. Further, a cover body is provided in the housing to form a chamber between the cover body and the outlet end of the filter. The chamber is in open communication with the first group of passages, and includes an outlet duct for passage of gas therethrough and to the discharge duct. Further, the housing provides an induction duct that opposes the outlet duct, for introduction of washing gas therethrough.

Dust collecting apparatus

A dust collecting apparatus of the type which includes an upright cylindrical housing provided therein with a plurality of circumferentially spaced lateral support beams arranged to form a vertical gas induction passage at the center of the housing and a plurality of circumferentially spaced vertical discharge passages along an internal peripheral surface of the housing, and plural sets of circumferentially spaced filter assemblies vertically mounted on the support beams in such a manner that the filter assemblies are exposed at their inner ends to the gas induction passage and at their outer ends to the discharge passages, wherein an internal upright support housing is disposed-within the cylindrical housing concentrically therewith to form the vertical gas induction passage, the filter assemblies are coupled at their inner ends with the corresponding openings formed in the peripheral wall of the support housing, and the support housing is vertically displaceably coupled at its upper end with a gas indution duct connected to the upper end of the cylindrical housing.

Dust collecting apparatus for high-temperature gas

An exhaust emission control device includes a single filter assembly composed of a pair of side plates respectively formed in an L-letter shape in cross-section and integrally assembled in a square framework having inlet and outlet openings, and a plurality of ceramic filter elements aligned in parallel within the square framework and clamped by the side plates. The filter elements are each made of porous ceramic material and have a thin-walled cellular structure square in cross-section formed with a plurality of axially extending passages separated from each other by thin partition walls, wherein a first group of the passages are closed at their one ends in a checked pattern and opened at their other ends to introduce therein exhaust gases to be purified, while a second group of the passages are opened at their one ends to discharge purified gases therefrom and closed at their other ends in a checked pattern.

Exhaust emission control device

A tire non-skid device including a net-like tire chain body, metal shanks planted in the tire chain body, and ceramic spikes fixed to tip ends of the metal shanks.

Non-skid devices for tires

A magnetic-drive device used for rotary machines, having a high torque transmitting efficiency, causing little temperature elevation of treated fluids and exhibiting mechanical strength and thermal shock resistance. The device comprises a chamber formed by combining a front casing with a rear casing to accommodate a rotor supporting a driven magnet. The rear casing consists of a cylindrical partition walled up at its one end with a bottom portion and provided with a flange portion on the other end, which partition having a thickness of 1.5-8 mm and consisting of a ceramic material having a specific resistance of at least 10.sup.7 .OMEGA.-cm. A driving magnet arranged outside the partition is magnetically coupled with the driven magnet through the partition.

Magnetic-drive device for rotary machinery

In a vibro-isolating joint including two rigid flanges, a flexible cylindrical member such as bellows interposed between the flanges and a plurality of limiting bolts extended through opposed through holes in the flanges, a cylindrical elastomer body is retained in each of through holes in at least one of the flanges and a hollow sleeve is concentrically integrated with the elastomer body so as to protrude one end of the hollow sleeve from an outer surface of the flange so that lock nuts on the limiting bolts engage the protruded ends of the hollow sleeves resiliently supported in the through holes, respectively to thereby provide a high axial thrust together with a vibration isolating property.

Growing community of inventors

Handa, Japan

Yasuo Akitsu