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FR502817A - Jack - Google Patents

Jack

Info

Publication number
FR502817A
FR502817A FR502817A FR502817DA FR502817A FR 502817 A FR502817 A FR 502817A FR 502817 A FR502817 A FR 502817A FR 502817D A FR502817D A FR 502817DA FR 502817 A FR502817 A FR 502817A
Authority
FR
France
Prior art keywords
jack
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
FR502817A
Other languages
French (fr)
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
Application granted granted Critical
Publication of FR502817A publication Critical patent/FR502817A/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
    • B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
    • B66F3/02—Devices, e.g. jacks, adapted for uninterrupted lifting of loads with racks actuated by pinions
    • B66F3/04—Devices, e.g. jacks, adapted for uninterrupted lifting of loads with racks actuated by pinions with several racks

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
FR502817A 1919-05-15 1919-08-19 Jack Expired FR502817A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US502817XA 1919-05-15 1919-05-15

Publications (1)

Publication Number Publication Date
FR502817A true FR502817A (en) 1920-05-27

Family

ID=21964374

Family Applications (1)

Application Number Title Priority Date Filing Date
FR502817A Expired FR502817A (en) 1919-05-15 1919-08-19 Jack

Country Status (1)

Country Link
FR (1) FR502817A (en)

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