GB197672A - Improvements in lifting jacks - Google Patents

Improvements in lifting jacks

Info

Publication number
GB197672A
GB197672A GB11899/23A GB1189923A GB197672A GB 197672 A GB197672 A GB 197672A GB 11899/23 A GB11899/23 A GB 11899/23A GB 1189923 A GB1189923 A GB 1189923A GB 197672 A GB197672 A GB 197672A
Authority
GB
United Kingdom
Prior art keywords
pawl
jacks
lifting jacks
schawenn
duff
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
GB11899/23A
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.)
DUFF Manufacturing CO
Original Assignee
DUFF Manufacturing CO
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 DUFF Manufacturing CO filed Critical DUFF Manufacturing CO
Publication of GB197672A publication Critical patent/GB197672A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F1/00—Devices, e.g. jacks, for lifting loads in predetermined steps
    • B66F1/02—Devices, e.g. jacks, for lifting loads in predetermined steps with locking elements, e.g. washers, co-operating with posts
    • B66F1/04—Devices, e.g. jacks, for lifting loads in predetermined steps with locking elements, e.g. washers, co-operating with posts the posts being toothed
    • B66F1/06—Devices, e.g. jacks, for lifting loads in predetermined steps with locking elements, e.g. washers, co-operating with posts the posts being toothed and the devices being actuated mechanically
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S254/00—Implements or apparatus for applying pushing or pulling force
    • Y10S254/12—Pawls

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Jib Cranes (AREA)
  • Soil Working Implements (AREA)
  • Ladders (AREA)
  • Breakers (AREA)

Abstract

197,672. Duff Manufacturing Co., (Assignees of Schawenn, F. H.). May 12, 1922, [Convention datel. Jacks.-In ratchet jacks the lifting paw. 11 and the retaining pawl 9, Fig. 5, are kept out of action during lowering by engagement with a member 13, Fig. 14, pivoted to the casing. Downward projections 14 of the member 13 bear against shoulders 18 on the pawl 9, and the notched extremity 16 receives the tip of the pawl 11. The parts are released by raising the actuating lever.
GB11899/23A 1922-05-12 1923-05-02 Improvements in lifting jacks Expired GB197672A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US560351A US1466195A (en) 1922-05-12 1922-05-12 Trip jack

Publications (1)

Publication Number Publication Date
GB197672A true GB197672A (en) 1923-09-13

Family

ID=24237431

Family Applications (1)

Application Number Title Priority Date Filing Date
GB11899/23A Expired GB197672A (en) 1922-05-12 1923-05-02 Improvements in lifting jacks

Country Status (4)

Country Link
US (1) US1466195A (en)
DE (1) DE404195C (en)
FR (1) FR565605A (en)
GB (1) GB197672A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2416528A (en) * 2004-07-23 2006-02-01 Dominic Alan Farnworth Door type lifting jack

Also Published As

Publication number Publication date
US1466195A (en) 1923-08-28
DE404195C (en) 1924-10-14
FR565605A (en) 1924-01-31

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