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This invention relates to a screw compressor system comprises a plurality of screw compressors (A, to An) the capacity of each of which is controlled by repeating load operation and no-load operation. Using a timer output corresponding to compressed gas consumption in a demander (5) having gas consumption equipment, a parent controller (B1) determines the number of compressors to be operated among the plurality of compressors (A, to An). Among the compressors determined to be operated, all compressors other than one are put in load operation. In accordance with a load factor of the excepted one screw compressor, the parent controller (B1) controls discharge pressure of each compressor. At this time, the control is made so that discharge pressure of the screw compressor system measured by a pressure gauge be lower than that upon the maximum gas consumption.

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Notices, Deadlines & Correspondence

Patent Information

Application #
Filing Date
13 February 2001
Publication Number
Publication Type
Invention Field
Status
Email
Parent Application
Patent Number
Legal Status
Grant Date
2006-06-30
Renewal Date

Applicants

HITACHI,LTD
6,KANDA SURUGADAI 4-CHOME,CHIYODA-KU,TOKYO,
T-TEC CO.LTD
603 KANDATSUMACHI,TSUCHIURA-SHI,IBARAKI-KEN,

Inventors

1. KAZUYA KANAZAKI
5-1,MARUNOUCHI 1-CHOME,CHIYODA-KU,TOKYO 100-8220.
2. SHINICHI HIROSE
603,KANDATSUMACHI,TSUCHIURA-SHI,IBARAKI-KEN,
3. JUNJI OKITA
1-CHOME,CHIYODA-KU,TOKYO 100-8220
4. SEIJI TSURU
1-CHOME,CHIYODA-KU,TOKYO 100-8220

Specification

Documents

Application Documents

# Name Date
1 80-cal-2001-granted-translated copy of priority document.pdf 2011-10-06
2 80-cal-2001-granted-specification.pdf 2011-10-06
3 80-cal-2001-granted-priority document.pdf 2011-10-06
4 80-cal-2001-granted-letter patent.pdf 2011-10-06
5 80-cal-2001-granted-form 5.pdf 2011-10-06
6 80-cal-2001-granted-form 3.pdf 2011-10-06
7 80-cal-2001-granted-form 26.pdf 2011-10-06
8 80-cal-2001-granted-form 2.pdf 2011-10-06
9 80-cal-2001-granted-form 18.pdf 2011-10-06
10 80-cal-2001-granted-form 1.pdf 2011-10-06
11 80-cal-2001-granted-examination report.pdf 2011-10-06
12 80-cal-2001-granted-drawings.pdf 2011-10-06
13 80-cal-2001-granted-description (complete).pdf 2011-10-06
14 80-cal-2001-granted-correspondence.pdf 2011-10-06
15 80-cal-2001-granted-claims.pdf 2011-10-06
16 80-cal-2001-granted-abstract.pdf 2011-10-06
17 00080-cal-2001-priority document.pdf 2011-10-06
18 00080-cal-2001-priority document others.pdf 2011-10-06
19 00080-cal-2001-form-5.pdf 2011-10-06
20 00080-cal-2001-form-3.pdf 2011-10-06
21 00080-cal-2001-form-26.pdf 2011-10-06
22 00080-cal-2001-form-2.pdf 2011-10-06
23 00080-cal-2001-form-18.pdf 2011-10-06
24 00080-cal-2001-form-1.pdf 2011-10-06
25 00080-cal-2001-drawings.pdf 2011-10-06
26 00080-cal-2001-description(complete).pdf 2011-10-06
27 00080-cal-2001-correspondence.pdf 2011-10-06
28 00080-cal-2001-claims.pdf 2011-10-06
29 00080-cal-2001-abstract.pdf 2011-10-06
30 80-CAL-2001-(11-09-2012)-CORRESPONDENCE.pdf 2012-09-11
31 80-CAL-2001-FORM-27.pdf 2013-04-12
32 80-CAL-2001-FORM-27-1.1.pdf 2013-04-15
33 80-CAL-2001-(20-01-2014)-OTHERS.pdf 2014-01-20
34 80-CAL-2001-(20-01-2014)-CORRESPONDENCE.pdf 2014-01-20
35 80-CAL-2001-(10-03-2014)-OTHERS.pdf 2014-03-10
36 80-CAL-2001-(10-03-2014)-FORM-16.pdf 2014-03-10
37 80-CAL-2001-(10-03-2014)-CORRESPONDENCE.pdf 2014-03-10
38 80-CAL-2001-(13-03-2014)-FORM-27.pdf 2014-03-13
39 80-CAL-2001-(28-03-2016)-FORM-27.pdf 2016-03-28
40 Form 27 [29-03-2017(online)].pdf 2017-03-29
41 80-CAL-2001-PROOF OF ALTERATION [11-09-2017(online)].pdf 2017-09-11
42 80-CAL-2001-POWER OF AUTHORITY [11-09-2017(online)].pdf_11.pdf 2017-09-11
43 80-CAL-2001-POWER OF AUTHORITY [11-09-2017(online)].pdf 2017-09-11
44 80-CAL-2001-FORM-16 [11-09-2017(online)].pdf_10.pdf 2017-09-11
45 80-CAL-2001-FORM-16 [11-09-2017(online)].pdf 2017-09-11
46 80-CAL-2001-ASSIGNMENT WITH VERIFIED COPY [11-09-2017(online)].pdf_9.pdf 2017-09-11
47 80-CAL-2001-ASSIGNMENT WITH VERIFIED COPY [11-09-2017(online)].pdf 2017-09-11
48 80-CAL-2001-RELEVANT DOCUMENTS [19-03-2018(online)].pdf 2018-03-19
49 80-CAL-2001-RELEVANT DOCUMENTS [23-03-2018(online)]_26.pdf 2018-03-23
50 80-CAL-2001-RELEVANT DOCUMENTS [23-03-2018(online)].pdf 2018-03-23
51 80-CAL-2001-RELEVANT DOCUMENTS [15-03-2019(online)].pdf 2019-03-15
52 80-CAL-2001-RELEVANT DOCUMENTS [11-03-2020(online)].pdf 2020-03-11

ERegister / Renewals

3rd: 05 Feb 2007

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19th: 31 Dec 2018

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20th: 01 Jan 2020

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