NL277490A - - Google Patents

Info

Publication number
NL277490A
NL277490A NL277490DA NL277490A NL 277490 A NL277490 A NL 277490A NL 277490D A NL277490D A NL 277490DA NL 277490 A NL277490 A NL 277490A
Authority
NL
Netherlands
Application number
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.)
Publication of NL277490A publication Critical patent/NL277490A/xx

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH 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
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J1/00—Pistons; Trunk pistons; Plungers
    • F16J1/005—Pistons; Trunk pistons; Plungers obtained by assembling several pieces
    • F16J1/006—Pistons; Trunk pistons; Plungers obtained by assembling several pieces of different materials
    • 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
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J10/00—Engine or like cylinders; Features of hollow, e.g. cylindrical, bodies in general
    • F16J10/02—Cylinders designed to receive moving pistons or plungers
NL277490D 1961-04-20 NL277490A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DEB62205A DE1229480B (en) 1961-04-20 1961-04-20 Hydraulic pit ram
DE1963B0071366 DE1240018C2 (en) 1961-04-20 1963-04-01 Hydraulic pit ram
DEB74658A DE1292604B (en) 1961-04-20 1963-12-13 Hydraulic pit ram

Publications (1)

Publication Number Publication Date
NL277490A true NL277490A (en)

Family

ID=27209148

Family Applications (2)

Application Number Title Priority Date Filing Date
NL277490D NL277490A (en) 1961-04-20
NL6411096A NL6411096A (en) 1961-04-20 1964-09-23

Family Applications After (1)

Application Number Title Priority Date Filing Date
NL6411096A NL6411096A (en) 1961-04-20 1964-09-23

Country Status (4)

Country Link
US (1) US3166991A (en)
DE (3) DE1229480B (en)
GB (3) GB1010905A (en)
NL (2) NL6411096A (en)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2636794C2 (en) * 1975-09-09 1982-06-09 Voest-Alpine AG, 1011 Wien Rock impact valve for hydraulic pit support elements
US4009645A (en) * 1975-11-03 1977-03-01 Gerhart Engineering And Machine Company Piston pump
US4073312A (en) * 1976-06-21 1978-02-14 National Distillers And Chemical Corporation Charge and relief valve
US4203354A (en) * 1976-12-20 1980-05-20 The Bendix Corporation Hydraulic piston with metallic O-ring groove and non-metallic slidable surfaces
US4165880A (en) * 1977-07-11 1979-08-28 Olsson Hans O Sealing device
DE3734547A1 (en) * 1987-10-13 1989-05-03 Festo Kg PISTON CYLINDER AGGREGATE
US5230443A (en) * 1990-06-13 1993-07-27 Du Benjamin R Condiment dispensing device
AT395047B (en) * 1990-11-21 1992-08-25 Reisner & Wolff Eng POT-LIKE HYDRAULIC CYLINDER
US5299489A (en) * 1991-05-17 1994-04-05 Reo Hydraulic Pierce & Form Pressure cylinder with low tolerance fit capable of supporting large transverse loads
US6099264A (en) * 1998-08-27 2000-08-08 Itt Manufacturing Enterprises, Inc. Pump controller
US6062427A (en) * 1998-08-27 2000-05-16 Du Investments L.L.C. Beer keg and pre-mixed beverage tank change-over device
US6343539B1 (en) 1999-11-10 2002-02-05 Benjamin R. Du Multiple layer pump diaphragm
DE19954577C1 (en) * 1999-11-12 2001-06-21 Hyco Pacoma Gmbh Lift cylinder unit for a lifting platform
WO2011101716A2 (en) 2010-02-19 2011-08-25 Council Of Scientific And Industrial Research A device for roof support of underground mine/tunnel

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH92916A (en) * 1920-10-13 1922-02-16 W H Dorman & Co Ltd Shoring column for tunnels, mines etc.
DE857679C (en) * 1943-10-18 1952-12-01 Smith S Jacking Systems Ltd Pressurized device, such as a jack or other lifting device
DE805586C (en) * 1945-11-16 1951-05-25 Ondulex Sarl Soc Piston ring
US2584926A (en) * 1949-08-05 1952-02-05 Birmingham Small Arms Co Ltd Plunger for inflating pumps
DE847283C (en) * 1950-07-09 1952-08-21 Mannesmann Ag Hydraulic pit ram
DE941541C (en) * 1952-04-09 1956-04-12 Eisenwerk Wanheim G M B H Adjustable metal pit punch
DE1063098B (en) * 1953-07-28 1959-08-13 Pleiger Maschf Paul Compressed air feed for rock drills u. Like. With telescoping support tubes
DE1044004B (en) * 1954-05-11 1958-11-20 Maschf Hydraulic pit ram
DE1023436B (en) * 1955-11-24 1958-01-30 Hermann Schwarz Kommanditgesel Hydraulic pit ram
BE558508A (en) * 1956-06-21
BE559110A (en) * 1956-07-11
BE560243A (en) * 1956-08-25
BE560360A (en) * 1956-08-29
FR1180897A (en) * 1957-08-07 1959-06-10 Etude Hydraulique Dans L Ind E Installation of mine ceilings support
DE1103699B (en) * 1958-05-22 1961-03-30 Segments Amedee Bollee S A R L Piston ring
DE1059380B (en) * 1958-08-07 1959-06-18 Karl Gerlach Multi-part pit stamp

Also Published As

Publication number Publication date
GB1077857A (en) 1967-08-02
DE1240018C2 (en) 1973-02-08
NL6411096A (en) 1965-06-14
DE1240018B (en) 1967-05-11
US3166991A (en) 1965-01-26
GB1010905A (en) 1965-11-24
DE1292604B (en) 1969-04-17
GB1037686A (en) 1966-08-03
DE1229480B (en) 1966-12-01

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