Patent US5394226A successfully refreshed from Google Patents.
EP0296803A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
High density pneumatic transport method for use in powder or granular material and system for practising the method
Assignee: Matsui Mfg Co Ltd
•
Filing: 1988-06-21
•
Granted: —
•
Expires: 2008-06-21
Abstract
Abstract An improved method and the related system for pneumatically transporting powdered or granular materials stored in an airtight storage container(3) to a collector(6) through a transport pipe(5) in the form of a lengthy column(P) in high density and at a slow speed by the use of pressurized gas. The method of the invention comprises the steps of stopping feeding of the pressurized gas when the whole of powdered or granular materials corresponding to final batch contained in the storage container(3) are sent into the material transport pipe(5), simultaneously discharge internal pressure of the storage container(3) through a gas decompressing means(B), inserting a transport plug(14) from the base end of the material transport pipe(5), and carrying forward the transport plug(14) at a slow speed by feeding pressurized gas from the base end of the transport pipe(5).
Inventors
- 👤 Kiyoshi Morimoto
- 👤 Akikazu Iwamoto
- 👤 Masuo Moriyama
- 👤 Junji C/O Osaka Works Nakagawa
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 07:11
CPC Classifications
B; B65; B65G; B65G53/00; B65G53/04; B65G53/34; B65G53/52; B65G53/525
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
223 words
(1) A high density pneumatic transport method of pneumatically transporting powdered or granular materials stored in an airtight storage container(3) to a collector(6) through a transport pipe(5) by the use of pressurized gas comprising the steps of sequentially feeding a predetermined amount of powdered or granular materials fed from a material supply station into the airtight storage container(3) while splitting the materials into a plurality of batches which are composed of a plurality of normal batches and one final batch, feeding pressurized gas into the storage container(3) maintaining airtight condition so as to send the materials contained in the storage container(3) into the transport pipe(5), wherein said method is characterized by the following steps: - stopping feeding of the pressurized gas when the whole of powdered or granular materials corresponding to the final batch contained in the storage container(3) are sent into the material transport pipe(5) into the ; - simultaneously discharge internal pressure of the storage container through a gas decompressing means(B); - inserting a transport plug(14) from the base end of the material transport pipe(5) into the transport pipe(5); and - carrying forward the transport plug(14) at a slow speed together with the materials remaining in the transport pipe(5) to collector(6) through the transport pipe(5) by feeding pressurized gas from the base end of the transport pipe(5) into the transport pipe(5).
Claim 2
Dependent Claim
300 words
(2) A high density pneumatic transport system for pneumatically transporting powdered or granular materials stored in a airtight storage container to a collector through a transport pipe by use of pressurized gas characterized in that said system comprises; - an airtight storage container(3) provided with a pair of sensors(LS1),(LS2) one of the sensors(LS1) being adapted to detect the upper limit level of the materials contained in the storage container(3), and other of the sensors(LS2) being adapted to detect the lower limit level of the materials contain in the storage container(3); - a material feeding means(A) for sequentially feeding the materials from a material supply station into the storage container(3) while splitting the materials into a plurality of batches; - a collector(6) for receiving said material connected to said storage container(3) through a material transport pipe(5); - a pair of sensors(LS3),(LS4) for detecting the existence of the materials contained in the storage container, one of the sensors(LS3) being installed to position below the lower limit level, and the other of the sensors(LS4) being installed to position at the base end of the material transport pipe(5) close to the outlet of the storage container(3); - a transport plug(14)adapted to be close contact with the inner surface of said material transport pipe(5) and being inserted into the base end of the material transport pipe(5); - a decompressing means(B) for discharging pressurized gas charge in the storage container(3); - a gas supplying means(D) for feeding pressurized gas into the base end of the material transport pipe(15) so as to pneumatically transport the materials sent into the transport pipe(5) and to carry forward said transport plug(14); and - a controller unit(C) for controlling the gas supply means(D), the material supply means, and the gas decompression means(B) in response to detection signals from the sensors (LS1)...(LS4).
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.