GB9725915D0 - Valves - Google Patents

Valves

Info

Publication number
GB9725915D0
GB9725915D0 GBGB9725915.4A GB9725915A GB9725915D0 GB 9725915 D0 GB9725915 D0 GB 9725915D0 GB 9725915 A GB9725915 A GB 9725915A GB 9725915 D0 GB9725915 D0 GB 9725915D0
Authority
GB
United Kingdom
Prior art keywords
valves
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
GBGB9725915.4A
Other versions
GB2320312B (en
GB2320312A (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JOY MINING MACHINERY Ltd
Original Assignee
JOY MINING MACHINERY Ltd
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 JOY MINING MACHINERY Ltd filed Critical JOY MINING MACHINERY Ltd
Priority to US09/017,955 priority Critical patent/US5950673A/en
Publication of GB9725915D0 publication Critical patent/GB9725915D0/en
Priority to AU52956/98A priority patent/AU739640B2/en
Publication of GB2320312A publication Critical patent/GB2320312A/en
Application granted granted Critical
Publication of GB2320312B publication Critical patent/GB2320312B/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
    • E21D23/16—Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices
GB9725915A 1996-12-10 1997-12-09 Valves Expired - Lifetime GB2320312B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US09/017,955 US5950673A (en) 1997-12-09 1998-02-03 Valves
AU52956/98A AU739640B2 (en) 1997-12-09 1998-02-05 Valves

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GBGB9625635.9A GB9625635D0 (en) 1996-12-10 1996-12-10 Valves

Publications (3)

Publication Number Publication Date
GB9725915D0 true GB9725915D0 (en) 1998-02-04
GB2320312A GB2320312A (en) 1998-06-17
GB2320312B GB2320312B (en) 2000-08-02

Family

ID=10804230

Family Applications (2)

Application Number Title Priority Date Filing Date
GBGB9625635.9A Pending GB9625635D0 (en) 1996-12-10 1996-12-10 Valves
GB9725915A Expired - Lifetime GB2320312B (en) 1996-12-10 1997-12-09 Valves

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GBGB9625635.9A Pending GB9625635D0 (en) 1996-12-10 1996-12-10 Valves

Country Status (1)

Country Link
GB (2) GB9625635D0 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112855639A (en) * 2019-11-27 2021-05-28 哈威液压股份公司 Load holding valve, load holding valve group and method for assembling load holding valve

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2329428A (en) * 1997-09-20 1999-03-24 Joy Mining Machinery Limited Improvements in and relating to a hydraulic control system
NO20024992D0 (en) * 2002-10-17 2002-10-17 Bakke Oil Tools As Pressure compensated pilot controlled check valve
NO324956B1 (en) * 2006-06-15 2008-01-14 Ziebel As Device for controlled check valve

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5400816A (en) * 1990-10-05 1995-03-28 Dana Corporation Pilot actuated override mechanism for holding valve

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112855639A (en) * 2019-11-27 2021-05-28 哈威液压股份公司 Load holding valve, load holding valve group and method for assembling load holding valve
CN112855639B (en) * 2019-11-27 2023-06-06 哈威液压股份公司 Load holding valve, load holding valve block and method for assembling a load holding valve

Also Published As

Publication number Publication date
GB9625635D0 (en) 1997-01-29
GB2320312B (en) 2000-08-02
GB2320312A (en) 1998-06-17

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Legal Events

Date Code Title Description
PE20 Patent expired after termination of 20 years

Expiry date: 20171208