GB309894A - Improvements in or relating to lifting-dogs or like devices - Google Patents

Improvements in or relating to lifting-dogs or like devices

Info

Publication number
GB309894A
GB309894A GB161228A GB161228A GB309894A GB 309894 A GB309894 A GB 309894A GB 161228 A GB161228 A GB 161228A GB 161228 A GB161228 A GB 161228A GB 309894 A GB309894 A GB 309894A
Authority
GB
United Kingdom
Prior art keywords
jaws
spindle
working
dogs
relating
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
GB161228A
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.)
MILLIKEN BROTHERS AND BLAW KNO
OSCAR STEPHEN ZELL
Original Assignee
MILLIKEN BROTHERS AND BLAW KNO
OSCAR STEPHEN ZELL
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 MILLIKEN BROTHERS AND BLAW KNO, OSCAR STEPHEN ZELL filed Critical MILLIKEN BROTHERS AND BLAW KNO
Priority to GB161228A priority Critical patent/GB309894A/en
Publication of GB309894A publication Critical patent/GB309894A/en
Expired legal-status Critical Current

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
    • E21B31/00—Fishing for or freeing objects in boreholes or wells
    • E21B31/12—Grappling tools, e.g. tongs or grabs

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Marine Sciences & Fisheries (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)

Abstract

309,894. Zell, O. S., and Milliken Bros. & Blaw-Knox, Ltd. Jan. 17, 1928. Borehole apparatus.-A tool intended particularly for picking up stones or small objects from boreholes comprises gripping-jaws 10 pivoted at 18 on a spider 16 working on a screwed spindle 15. Cam-shaped extensions 12 of the jaws are engaged by sleeves 20 on a nut 19 working on an oppositely-threaded part 14 of the spindle. The jaws are opened and closed by rotating the spindle. Specification 204,636, [Class 68 (ii), Subaqueous buildings &c.] is referred to.
GB161228A 1928-01-17 1928-01-17 Improvements in or relating to lifting-dogs or like devices Expired GB309894A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB161228A GB309894A (en) 1928-01-17 1928-01-17 Improvements in or relating to lifting-dogs or like devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB161228A GB309894A (en) 1928-01-17 1928-01-17 Improvements in or relating to lifting-dogs or like devices

Publications (1)

Publication Number Publication Date
GB309894A true GB309894A (en) 1929-04-17

Family

ID=9724954

Family Applications (1)

Application Number Title Priority Date Filing Date
GB161228A Expired GB309894A (en) 1928-01-17 1928-01-17 Improvements in or relating to lifting-dogs or like devices

Country Status (1)

Country Link
GB (1) GB309894A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2437572A (en) * 1944-01-13 1948-03-09 Leo N Walter Power excavating apparatus
US2490836A (en) * 1944-10-10 1949-12-13 Robert G Schriefer Tuning means
GB2243801A (en) * 1990-04-21 1991-11-13 Hope Leslie Clamps

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2437572A (en) * 1944-01-13 1948-03-09 Leo N Walter Power excavating apparatus
US2490836A (en) * 1944-10-10 1949-12-13 Robert G Schriefer Tuning means
GB2243801A (en) * 1990-04-21 1991-11-13 Hope Leslie Clamps

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