GB1197841A - Hydraulic Prop. - Google Patents

Hydraulic Prop.

Info

Publication number
GB1197841A
GB1197841A GB8668A GB8668A GB1197841A GB 1197841 A GB1197841 A GB 1197841A GB 8668 A GB8668 A GB 8668A GB 8668 A GB8668 A GB 8668A GB 1197841 A GB1197841 A GB 1197841A
Authority
GB
United Kingdom
Prior art keywords
piston
passages
hydraulic prop
hydraulic pit
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
Application number
GB8668A
Inventor
Wladyslan Zembok
Bohdan Sawka
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.)
Glowny Instytut Gornictwa
Original Assignee
Glowny Instytut Gornictwa
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
Priority claimed from PL118273A external-priority patent/PL57410B1/pl
Application filed by Glowny Instytut Gornictwa filed Critical Glowny Instytut Gornictwa
Publication of GB1197841A publication Critical patent/GB1197841A/en
Expired legal-status Critical Current

Links

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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Earth Drilling (AREA)
  • Details Of Reciprocating Pumps (AREA)

Abstract

1,197,841. Hydraulic pit props. GLOWNY INSTYTUT GORNICTWA. 1 Jan., 1968 [31 Dec., 1966], No. 86/68. Heading E1P. An hydraulic pit prop of the piston-andcylinder type 1, 9 surrounded by a protective casing 3 to define therewith an annular gap or a series of passages 4a has a scraper 13 mounted on the piston to clean the cylinder 1 during its upward stroke and remove any impurities through the gap or passages aforesaid.
GB8668A 1966-12-31 1968-01-01 Hydraulic Prop. Expired GB1197841A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PL118273A PL57410B1 (en) 1966-12-31

Publications (1)

Publication Number Publication Date
GB1197841A true GB1197841A (en) 1970-07-08

Family

ID=19949589

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8668A Expired GB1197841A (en) 1966-12-31 1968-01-01 Hydraulic Prop.

Country Status (3)

Country Link
DE (1) DE1583101A1 (en)
FR (1) FR1549102A (en)
GB (1) GB1197841A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112253190A (en) * 2020-10-22 2021-01-22 白莹 Efficient and high-safety hydraulic prop for coal mine excavation

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
HU171077B (en) * 1975-01-15 1977-11-28 Banyaszati Kutato Intezet Hydraulic prop

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112253190A (en) * 2020-10-22 2021-01-22 白莹 Efficient and high-safety hydraulic prop for coal mine excavation

Also Published As

Publication number Publication date
FR1549102A (en) 1968-12-06
DE1583101A1 (en) 1970-04-23

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees