IT7851728A0 - Perfezionamenti nei puntelli per miniere e simili - Google Patents

Perfezionamenti nei puntelli per miniere e simili

Info

Publication number
IT7851728A0
IT7851728A0 IT7851728A IT5172878A IT7851728A0 IT 7851728 A0 IT7851728 A0 IT 7851728A0 IT 7851728 A IT7851728 A IT 7851728A IT 5172878 A IT5172878 A IT 5172878A IT 7851728 A0 IT7851728 A0 IT 7851728A0
Authority
IT
Italy
Prior art keywords
mines
props
similar
Prior art date
Application number
IT7851728A
Other languages
English (en)
Other versions
IT1107988B (it
Original Assignee
Commercial Shearing
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Commercial Shearing filed Critical Commercial Shearing
Publication of IT7851728A0 publication Critical patent/IT7851728A0/it
Application granted granted Critical
Publication of IT1107988B publication Critical patent/IT1107988B/it

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • F16K17/08—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with special arrangements for providing a large discharge passage
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8158—With indicator, register, recorder, alarm or inspection means
    • Y10T137/8326—Fluid pressure responsive indicator, recorder or alarm
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/87169—Supply and exhaust
    • Y10T137/87233—Biased exhaust valve
    • Y10T137/87241—Biased closed

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Safety Valves (AREA)
  • Lift Valve (AREA)
  • Lining And Supports For Tunnels (AREA)
IT5172878A 1978-04-03 1978-10-31 Perfezionamenti nei puntelli per miniere e simili IT1107988B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/892,914 US4237769A (en) 1978-04-03 1978-04-03 Relief valves and mine props incorporating the same

Publications (2)

Publication Number Publication Date
IT7851728A0 true IT7851728A0 (it) 1978-10-31
IT1107988B IT1107988B (it) 1985-12-02

Family

ID=25400700

Family Applications (1)

Application Number Title Priority Date Filing Date
IT5172878A IT1107988B (it) 1978-04-03 1978-10-31 Perfezionamenti nei puntelli per miniere e simili

Country Status (10)

Country Link
US (1) US4237769A (it)
JP (1) JPS54131124A (it)
AU (1) AU525031B2 (it)
BR (1) BR7806968A (it)
CA (1) CA1086180A (it)
DE (1) DE2840008C2 (it)
FR (1) FR2422093A1 (it)
GB (1) GB2017869B (it)
IT (1) IT1107988B (it)
ZA (1) ZA786483B (it)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57168597U (it) * 1981-04-17 1982-10-23
DE4140317C2 (de) * 1991-12-06 1995-03-23 Vos Richard Grubenausbau Gmbh Ventilanordnung für den Einzelstempelausbau im untertägigen Berg- und Tunnelbau
DE4323462C2 (de) * 1993-07-14 1995-05-04 Vos Richard Grubenausbau Gmbh Ausbaustempel für den Untertageeinsatz mit integriertem Druckbegrenzungsventil
CN101275685B (zh) * 2008-03-25 2010-06-02 北京天地玛珂电液控制系统有限公司 乳化液介质大流量安全阀
JP5984397B2 (ja) * 2012-01-13 2016-09-06 Ｋｙｂ株式会社 リリーフ弁
CN108518519B (zh) * 2018-04-23 2024-01-30 科堡科技（江苏）有限公司 一种电磁阀
CN109944616B (zh) * 2019-04-29 2020-07-24 柳州市锐科机械有限公司 一种具有阀嘴防尘功能的支撑效果好的单体液压支柱

Family Cites Families (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1593648A (en) * 1926-07-27 Pressure-regulating valve
US1660382A (en) * 1922-08-01 1928-02-28 American Schaeffer & Budenberg Compound relief valve
US1949150A (en) * 1931-03-19 1934-02-27 Cons Ashcroft Hancock Co Safety valve
US2477496A (en) * 1946-12-03 1949-07-26 Sam W Russell Safety auxiliary application valve
BE486663A (it) * 1948-01-12
DE1131625B (de) * 1955-08-13 1962-06-20 Kronprinz Ag Hydraulischer Grubenstempel
GB877624A (en) * 1958-07-31 1961-09-20 Dowty Mining Equipment Ltd Improvements in release valves for hydraulic props
FR1230320A (fr) * 1959-07-17 1960-09-15 Valve hydraulique à contact
GB903380A (en) * 1960-06-21 1962-08-15 Hydraulic Crushers Ltd Improvements in or relating to release valves
FR1275883A (fr) * 1960-12-10 1961-11-10 Dowty Mining Equipment Ltd Soupape de décompression notamment pour étançons hydrauliques
GB1031719A (en) * 1962-03-24 1966-06-02 Dobson Ltd W E & F Improvements in or relating to hydraulic pressure gauges for hydraulic roof supports and supports incorporating same
US3164166A (en) * 1962-06-14 1965-01-05 Hydraulic Unit Specialities Co Pilot operated pressure and vacuum relief valve
GB1050951A (it) * 1963-01-26
US3212523A (en) * 1963-09-27 1965-10-19 Parker Hannifin Corp Fluid system and relief valve assembly therefor
US3412753A (en) * 1965-10-23 1968-11-26 Art Co Soc Relief valve cartridge
GB1342741A (it) * 1970-01-24 1974-01-03
GB1332152A (en) * 1970-01-24 1973-10-03 Dobson Ltd W E F Fluid pressure relief valve assembly
US3699991A (en) * 1970-08-28 1972-10-24 Johnson Service Co Supply connection means for bleed type sensing apparatus
US3820444A (en) * 1970-09-28 1974-06-28 Caterpillar Tractor Co Pneumatic starter modulation for pneumatically driven systems
GB1430240A (en) * 1972-07-22 1976-03-31 Dowty Mining Equipment Ltd Mine roof support
JPS5169917U (it) * 1974-11-29 1976-06-02
DE2636794C2 (de) * 1975-09-09 1982-06-09 Voest-Alpine AG, 1011 Wien Gebirgsschlagventil für hydraulische Grubenausbauelemente

Also Published As

Publication number Publication date
FR2422093A1 (fr) 1979-11-02
DE2840008A1 (de) 1979-10-04
ZA786483B (en) 1979-10-31
GB2017869A (en) 1979-10-10
IT1107988B (it) 1985-12-02
CA1086180A (en) 1980-09-23
AU525031B2 (en) 1982-10-14
JPS54131124A (en) 1979-10-12
DE2840008C2 (de) 1984-05-17
US4237769A (en) 1980-12-09
BR7806968A (pt) 1980-04-22
GB2017869B (en) 1982-08-25
AU4092178A (en) 1979-12-06

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