GB821645A - Improvements in or relating to hydraulic pit props - Google Patents
Improvements in or relating to hydraulic pit propsInfo
- Publication number
- GB821645A GB821645A GB23671/56A GB2367156A GB821645A GB 821645 A GB821645 A GB 821645A GB 23671/56 A GB23671/56 A GB 23671/56A GB 2367156 A GB2367156 A GB 2367156A GB 821645 A GB821645 A GB 821645A
- Authority
- GB
- United Kingdom
- Prior art keywords
- ring
- piston
- rubber
- relating
- gap
- 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
- 239000002657 fibrous material Substances 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- 238000012856 packing Methods 0.000 abstract 1
- 230000000717 retained effect Effects 0.000 abstract 1
Classifications
-
- 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
- E21D15/45—Hydraulic, pneumatic, or hydraulic-pneumatic props having closed fluid system, e.g. with built-in pumps or accumulators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
- B60K35/60—Instruments characterised by their location or relative disposition in or on vehicles
-
- 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
- E21D15/50—Component parts or details of props
- E21D15/51—Component parts or details of props specially adapted to hydraulic, pneumatic, or hydraulic-pneumatic props, e.g. arrangements of relief valves
- E21D15/517—Extension elements
-
- 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
- E21D15/50—Component parts or details of props
- E21D15/54—Details of the ends of props
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- Geology (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Actuator (AREA)
- Sealing Devices (AREA)
Abstract
821,645. Piston packing; stuffing-box substitutes. DOBSON Ltd., W. E. & F. Aug. 1, 1956, No. 23671/56. Classes 122 (1) and 122 (5). [Also in Group X] In an hydraulic telescopic pit prop the head of the piston 3 is sealed in the cylinder 1 by a rubber sealing- ring 40 having a tapered fit in a ring 41 of rubber reinforced with fibrous material which are adapted to be expanded by pressure into a gap 42. The rings are retained by a ring 39 and a screw 38. The upper end of the cylinder 1 is sealed against the pistion by a sealing-ring 15 held in place by a metal ring 14 and a rubber ring 12 held in position by a screwring 11. The air in the gap 44 between the two seals escapes by tube 43 to the interior of the piston or through the screwthreads in the ring 11.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL217834D NL217834A (en) | 1956-08-01 | ||
GB23671/56A GB821645A (en) | 1956-08-01 | 1956-08-01 | Improvements in or relating to hydraulic pit props |
FR1175841D FR1175841A (en) | 1956-08-01 | 1957-05-29 | Improvements relating to hydraulic mine props |
BE557913D BE557913A (en) | 1956-08-01 | 1957-05-29 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB23671/56A GB821645A (en) | 1956-08-01 | 1956-08-01 | Improvements in or relating to hydraulic pit props |
Publications (1)
Publication Number | Publication Date |
---|---|
GB821645A true GB821645A (en) | 1959-10-14 |
Family
ID=10199397
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB23671/56A Expired GB821645A (en) | 1956-08-01 | 1956-08-01 | Improvements in or relating to hydraulic pit props |
Country Status (4)
Country | Link |
---|---|
BE (1) | BE557913A (en) |
FR (1) | FR1175841A (en) |
GB (1) | GB821645A (en) |
NL (1) | NL217834A (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1215091B (en) * | 1961-06-29 | 1966-04-28 | Guenther W Hammer | Interchangeable stamp shoe for pit stamp |
GB8711378D0 (en) * | 1987-05-14 | 1987-06-17 | Nichols Hydraulic Products Ltd | Applying pressure to closed door |
-
0
- NL NL217834D patent/NL217834A/xx unknown
-
1956
- 1956-08-01 GB GB23671/56A patent/GB821645A/en not_active Expired
-
1957
- 1957-05-29 FR FR1175841D patent/FR1175841A/en not_active Expired
- 1957-05-29 BE BE557913D patent/BE557913A/xx unknown
Also Published As
Publication number | Publication date |
---|---|
NL217834A (en) | |
FR1175841A (en) | 1959-04-02 |
BE557913A (en) | 1957-06-15 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB566329A (en) | Improvements in flexible packings or sealing rings | |
GB797684A (en) | Improvements relating to u-section ring sealing devices | |
GB1365551A (en) | Seals | |
GB821645A (en) | Improvements in or relating to hydraulic pit props | |
GB756460A (en) | Improvements in or relating to sealing rings for use between relatively movable members | |
GB853996A (en) | Improvements in or relating to piston and rod packings | |
GB951775A (en) | Hydraulic shock absorber with pneumatic pressure compensation | |
GB961983A (en) | Hydraulically operable mine prop | |
GB1519302A (en) | Sealingring | |
GB1181294A (en) | Improvements in or relating to the Protection of Hydraulic Devices | |
GB876312A (en) | Improvements in or relating to scraper ring arrangement for fluid pressure operated jacks and props | |
GB948255A (en) | Improvements in or relating to hydraulic pit props | |
GB826214A (en) | Sealing or packing rings | |
GB734525A (en) | Improvements relating to packing rings | |
GB894292A (en) | Improvements in or relating to hydraulic props, particularly pit props | |
GB935177A (en) | Improvements in or relating to fluid pressure operated piston and cylinder arrangements | |
GB821697A (en) | Hydraulic accumulator | |
GB922643A (en) | An improved high-pressure seal | |
GB566435A (en) | Shaft seals | |
GB474055A (en) | Improvements in means for effecting packing or sealing between two surfaces | |
GB709065A (en) | Improvements in seals for relatively reciprocating members | |
GB1273698A (en) | Improvements in hydraulic pressure converters | |
GB602585A (en) | Improvements in or relating to sealing devices | |
GB936382A (en) | Improvements in or relating to fluid operated actuators | |
GB606001A (en) | Improvements in or relating to sealing glands or packings |