GB876990A - Hydraulic pit-props and other like support elements and relief valves therefor - Google Patents
Hydraulic pit-props and other like support elements and relief valves thereforInfo
- Publication number
- GB876990A GB876990A GB963358A GB963358A GB876990A GB 876990 A GB876990 A GB 876990A GB 963358 A GB963358 A GB 963358A GB 963358 A GB963358 A GB 963358A GB 876990 A GB876990 A GB 876990A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- prop
- pressure
- props
- support elements
- 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.)
- Expired
Links
- 239000012530 fluid Substances 0.000 abstract 1
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
- F16K17/10—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 auxiliary valve for fluid operation of the main valve
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/14—Telescopic props
- E21D15/44—Hydraulic, pneumatic, or hydraulic-pneumatic props
-
- 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
-
- 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
- F16K17/044—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 more than one spring
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Safety Valves (AREA)
Abstract
876,990. Fluid-actuated valves. EGGEMANN, W., and CAMPENHAUSEN, VON E., [trading as SCHWARZ KOMM.-GES., HERMANN]. March 26, 1958 [April 3, 1957], No. 9633/58. Class 135. A pressure relief valve for a pit-prop comprises a plurality of valves arranged in series between the prop and the outside atmosphere so that the pressure is relieved in stages and a gradual fall in pressure occurs between the prop and the atmosphere. Six similar valves are shown mounted in series in a tubular casing 10, each comprising a ball 27 loosely mounted in a plunger 26 loaded by a spring 24 and controlling a port 29 in an end plate 23. On the first valve adjacent the prop opening a space 17 between this valve and the second valve first fills with pressure fluid before the second valve opens. In like manner chambers 18 ... 22 are each filled in turn prior to the opening of each succeeding valve.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DESCH21864A DE1038505B (en) | 1957-04-03 | 1957-04-03 | Overpressure valve, especially for multi-part support elements of the pit lining |
Publications (1)
Publication Number | Publication Date |
---|---|
GB876990A true GB876990A (en) | 1961-09-06 |
Family
ID=7429169
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB963358A Expired GB876990A (en) | 1957-04-03 | 1958-03-26 | Hydraulic pit-props and other like support elements and relief valves therefor |
Country Status (4)
Country | Link |
---|---|
BE (1) | BE565731A (en) |
DE (1) | DE1038505B (en) |
GB (1) | GB876990A (en) |
NL (1) | NL226166A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2444392A (en) * | 2006-11-28 | 2008-06-04 | Bifold Fluidpower Ltd | Fluid flow control apparatus |
CN111239058A (en) * | 2020-02-24 | 2020-06-05 | 深圳九星印刷包装集团有限公司 | Indicating device |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3476142A (en) * | 1966-09-16 | 1969-11-04 | Eaton Yale & Towne | Multiple check valve |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE928945C (en) * | 1951-06-09 | 1955-06-16 | Eisenwerk Wanheim G M B H | Adjustable hydraulic pit ram |
-
0
- BE BE565731D patent/BE565731A/xx unknown
- NL NL226166D patent/NL226166A/xx unknown
-
1957
- 1957-04-03 DE DESCH21864A patent/DE1038505B/en active Pending
-
1958
- 1958-03-26 GB GB963358A patent/GB876990A/en not_active Expired
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2444392A (en) * | 2006-11-28 | 2008-06-04 | Bifold Fluidpower Ltd | Fluid flow control apparatus |
GB2444392B (en) * | 2006-11-28 | 2011-04-06 | Bifold Fluidpower Ltd | Fluid flow control apparatus |
GB2475192A (en) * | 2006-11-28 | 2011-05-11 | Bifold Fluidpower Ltd | Fluid flow control apparatus |
GB2475192B (en) * | 2006-11-28 | 2011-07-06 | Bifold Fluidpower Ltd | Fluid flow control apparatus |
US8220478B2 (en) | 2006-11-28 | 2012-07-17 | Bifold Fluidpower Limited | Fluid flow control apparatus |
CN111239058A (en) * | 2020-02-24 | 2020-06-05 | 深圳九星印刷包装集团有限公司 | Indicating device |
Also Published As
Publication number | Publication date |
---|---|
BE565731A (en) | |
NL226166A (en) | |
DE1038505B (en) | 1958-09-11 |
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