US1044194A - Lifting-jack. - Google Patents

Lifting-jack. Download PDF

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Publication number
US1044194A
US1044194A US69189612A US1912691896A US1044194A US 1044194 A US1044194 A US 1044194A US 69189612 A US69189612 A US 69189612A US 1912691896 A US1912691896 A US 1912691896A US 1044194 A US1044194 A US 1044194A
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US
United States
Prior art keywords
jack
lifting
top member
lifting bar
hinge
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 - Lifetime
Application number
US69189612A
Inventor
Lloyd E Kurtz
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
Priority to US69189612A priority Critical patent/US1044194A/en
Application granted granted Critical
Publication of US1044194A publication Critical patent/US1044194A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B66F13/00—Common constructional features or accessories
    • 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
    • Y10S254/04—Object engaging heads for jacks

Definitions

  • Figure 1 1s a side elevation of a lifting jack embodying my invention
  • My invention has relation to lifting jacks, and is designed to provide a jack the lifting bar of which has means of simple and effective character, in the nature of a folding .
  • the numeral 2 designates the frame of the jack, and 3 'the lifting bar, which is here shown as provided with rack teeth 4, which are engaged in the usual manner by a pawl operated by an oscillating actuating lever 5.
  • My invent-ion is not limited to this particular type of jack, but is applicable to various other types of jacks.
  • the lifting bar 3 is provided at its upper end with the raised piece 6 having a concave upper surface 7.
  • One side of this concave surface is preferably extended to a somewhat higher point than the opposite side, as shown in Fig. 1.
  • v 8 designates a folding top member, which is provided at one of its lower corners with the hinge lugs 9, which embrace a hinge lug 10 on the top piece 6, a pin or pintle 11 being inserted through the lugs.
  • the bottom portion of the folding top member has a concave lower surface adapted to fit the concave surface 7 of the piece 6 and thereby provide for an effective bearing support for Specification of Letters Patent.
  • top member The upper end of the top member is con-' cave, as shown at 12. Said, member is also shown as having concave sides, in order to give it a symmetrical appearance and to re Jerusalem the amount of metal required in its construction. It is reinforced by the interior ribs or webs 13. w
  • the piece 6 and top member 8 are provided with stop lugs 14 which engage each other when the top member is in the dotted position shown inFig. 1. These stops hold the top member from swinging back against Y the lifting bar to a position in which .it would interfere with the lowering movement of the bar.
  • the folding top member is thrown. upwardly into the position shown in full lines in Fig. 1, it provides the jack with a higher topadapted to reach up under higher set loads; whereas, when said member is thrown down into the position shown in dotted lines in Fig. 1, the jack is adapted for lower set work.
  • I'claimz- A liftingjack having a frame, a lifting bar provided with a seating surface at its upper end, and a top member hinged to the upper end of the lifting bar and adapted to fit said seating surface, the hinge connection for the to 3 member being offset laterally to one side of the lifting bar and to one side of the upright portion of the jack frame, and the bar and top member having cooperating stop surfaces whereby the hinge member when dropped on its hinge will be held to one side of the lifting bar and jack frame; substantially as described.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)

Description

L. E. KURTZ. LIP TING JACK. APPLICATION FILED A15R. 19, 1912.
1;,044194. Pateinted Nov. 12, 1912.
WITNESSES INVENTOR UNITED STATES PATENT OFFICE,
LLOYD E. KURTZ, OF SHARPSBURG, PENNSYLVANIA, ASSIG-NOR TO THE DUFF. MANU FACTURING- COMPANY, OF PITTSBURGH, PENNSYLVANIA, A CORPORATION .OF
PENNSYLVANIA.
To all whom it may concern:
Be it known that I, LLoYn E.,KURTZ, a
" .resident of fsharpsburg, Allegheny county,
scription, reference being had to the accom- Pennsylvania, have invented a new and useful Improvement in Lifting-Jacks, of which the following is a. full, clear, and exact depanying drawings, forming part of this speclficat-ion, 1n Wl11Cl1.
Figure 1 1s a side elevation of a lifting jack embodying my invention; and Fig. 2
is a detail view of the folding top.
My invention has relation to lifting jacks, and is designed to provide a jack the lifting bar of which has means of simple and effective character, in the nature of a folding .bodiment of my invention, the numeral 2 designates the frame of the jack, and 3 'the lifting bar, which is here shown as provided with rack teeth 4, which are engaged in the usual manner by a pawl operated by an oscillating actuating lever 5.
My invent-ion, however, is not limited to this particular type of jack, but is applicable to various other types of jacks.
The lifting bar 3 is provided at its upper end with the raised piece 6 having a concave upper surface 7. One side of this concave surface is preferably extended to a somewhat higher point than the opposite side, as shown in Fig. 1. v 8 designates a folding top member, which is provided at one of its lower corners with the hinge lugs 9, which embrace a hinge lug 10 on the top piece 6, a pin or pintle 11 being inserted through the lugs. The bottom portion of the folding top member has a concave lower surface adapted to fit the concave surface 7 of the piece 6 and thereby provide for an effective bearing support for Specification of Letters Patent.
Application filed April 19,
Patented Nov. 12-, 1912. 1912. Serial No, 691,896.
the top member acrossits' entire" bottom.
The upper end of the top member is con-' cave, as shown at 12. Said, member is also shown as having concave sides, in order to give it a symmetrical appearance and to re duce the amount of metal required in its construction. It is reinforced by the interior ribs or webs 13. w
The piece 6 and top member 8 are provided with stop lugs 14 which engage each other when the top member is in the dotted position shown inFig. 1. These stops hold the top member from swinging back against Y the lifting bar to a position in which .it would interfere with the lowering movement of the bar.
Then the folding top member is thrown. upwardly into the position shown in full lines in Fig. 1, it provides the jack with a higher topadapted to reach up under higher set loads; whereas, when said member is thrown down into the position shown in dotted lines in Fig. 1, the jack is adapted for lower set work.
I'claimz- A liftingjack having a frame, a lifting bar provided with a seating surface at its upper end, and a top member hinged to the upper end of the lifting bar and adapted to fit said seating surface, the hinge connection for the to 3 member being offset laterally to one side of the lifting bar and to one side of the upright portion of the jack frame, and the bar and top member having cooperating stop surfaces whereby the hinge member when dropped on its hinge will be held to one side of the lifting bar and jack frame; substantially as described.
Intestimony whereof, I have hereunto set my hand.
LLOYD E. KURTZ.
US69189612A 1912-04-19 1912-04-19 Lifting-jack. Expired - Lifetime US1044194A (en)

Priority Applications (1)

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US69189612A US1044194A (en) 1912-04-19 1912-04-19 Lifting-jack.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US69189612A US1044194A (en) 1912-04-19 1912-04-19 Lifting-jack.

Publications (1)

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US1044194A true US1044194A (en) 1912-11-12

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US69189612A Expired - Lifetime US1044194A (en) 1912-04-19 1912-04-19 Lifting-jack.

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3918683A (en) * 1974-01-09 1975-11-11 Daniel J Millar Electro-hydraulic jack

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3918683A (en) * 1974-01-09 1975-11-11 Daniel J Millar Electro-hydraulic jack

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