KR920019769U - Check valve wear prevention device for excavator hammer - Google Patents

Check valve wear prevention device for excavator hammer

Info

Publication number
KR920019769U
KR920019769U KR2019910004423U KR910004423U KR920019769U KR 920019769 U KR920019769 U KR 920019769U KR 2019910004423 U KR2019910004423 U KR 2019910004423U KR 910004423 U KR910004423 U KR 910004423U KR 920019769 U KR920019769 U KR 920019769U
Authority
KR
South Korea
Prior art keywords
check valve
prevention device
wear prevention
valve wear
excavator
Prior art date
Application number
KR2019910004423U
Other languages
Korean (ko)
Other versions
KR930002625Y1 (en
Inventor
박구연
Original Assignee
박구연
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 박구연 filed Critical 박구연
Priority to KR2019910004423U priority Critical patent/KR930002625Y1/en
Publication of KR920019769U publication Critical patent/KR920019769U/en
Application granted granted Critical
Publication of KR930002625Y1 publication Critical patent/KR930002625Y1/en

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B4/00—Drives for drilling, used in the borehole
    • E21B4/06—Down-hole impacting means, e.g. hammers
    • E21B4/14—Fluid operated hammers

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)
KR2019910004423U 1991-04-01 1991-04-01 Drilling hammer KR930002625Y1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR2019910004423U KR930002625Y1 (en) 1991-04-01 1991-04-01 Drilling hammer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR2019910004423U KR930002625Y1 (en) 1991-04-01 1991-04-01 Drilling hammer

Publications (2)

Publication Number Publication Date
KR920019769U true KR920019769U (en) 1992-11-17
KR930002625Y1 KR930002625Y1 (en) 1993-05-17

Family

ID=19312295

Family Applications (1)

Application Number Title Priority Date Filing Date
KR2019910004423U KR930002625Y1 (en) 1991-04-01 1991-04-01 Drilling hammer

Country Status (1)

Country Link
KR (1) KR930002625Y1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190097524A (en) 2018-02-12 2019-08-21 전세원 Specific immune response through disease diagnostic kit

Also Published As

Publication number Publication date
KR930002625Y1 (en) 1993-05-17

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Legal Events

Date Code Title Description
A201 Request for examination
E701 Decision to grant or registration of patent right
REGI Registration of establishment
FPAY Annual fee payment

Payment date: 19960516

Year of fee payment: 4

LAPS Lapse due to unpaid annual fee