US1409068A - Safety lifting hook - Google Patents

Safety lifting hook Download PDF

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Publication number
US1409068A
US1409068A US425367A US42536720A US1409068A US 1409068 A US1409068 A US 1409068A US 425367 A US425367 A US 425367A US 42536720 A US42536720 A US 42536720A US 1409068 A US1409068 A US 1409068A
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US
United States
Prior art keywords
hook
keeper
slot
upper portion
flattened
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
US425367A
Inventor
Simpson William Peter
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to US425367A priority Critical patent/US1409068A/en
Application granted granted Critical
Publication of US1409068A publication Critical patent/US1409068A/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
    • B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
    • B66C1/22—Rigid members, e.g. L-shaped members, with parts engaging the under surface of the loads; Crane hooks
    • B66C1/34—Crane hooks
    • B66C1/36—Crane hooks with means, e.g. spring-biased detents, for preventing inadvertent disengagement of loads
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T24/00—Buckles, buttons, clasps, etc.
    • Y10T24/45—Separable-fastener or required component thereof [e.g., projection and cavity to complete interlock]
    • Y10T24/45225—Separable-fastener or required component thereof [e.g., projection and cavity to complete interlock] including member having distinct formations and mating member selectively interlocking therewith
    • Y10T24/45272—Projection passes through cavity then moves toward noninserted portion of its member to complete interlock [e.g., snap hook]
    • Y10T24/45288—Hook type projection member
    • Y10T24/45304—Noninserted portion of projection member includes movably connected gate for closing access throat
    • Y10T24/45319—Pivotally connected gate
    • Y10T24/45335—Pivotally connected gate having means biasing gate about pivot
    • Y10T24/4534—Pivotally connected gate having means biasing gate about pivot and position locking-means for gate
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T24/00—Buckles, buttons, clasps, etc.
    • Y10T24/45—Separable-fastener or required component thereof [e.g., projection and cavity to complete interlock]
    • Y10T24/45225—Separable-fastener or required component thereof [e.g., projection and cavity to complete interlock] including member having distinct formations and mating member selectively interlocking therewith
    • Y10T24/45272—Projection passes through cavity then moves toward noninserted portion of its member to complete interlock [e.g., snap hook]
    • Y10T24/45288—Hook type projection member
    • Y10T24/45304—Noninserted portion of projection member includes movably connected gate for closing access throat
    • Y10T24/45319—Pivotally connected gate
    • Y10T24/45377—Gate closes when structure-to-be-secured is tensioned

Definitions

  • WILLIAM PETER SIMPSON, OF HOBSONVILLE, AUCKLAND, NEW ZEALAND.
  • This invention relates to hooks used on cranes, derricks and the like for lifting cargo and other loads, and provides an improved form of safety hook forthe aforesaid purpose.
  • the hook is formed with a flattened upper portion on either side of which the sides of a forked keeper pass, said forked keeper being pivoted to the flattened portion near the edge thereof located over or nearest the hook point.
  • the flattened portion of the hook contains an arcuate slot concentric with the pivot of the keeper, and at the lower end of said slot, in the side edge thereof furthest from the pivot, a slight recess is provided.
  • Both sides of the forked keeper contain a slightly elongated hole through both of which and the slot in the flattened portion of the hook, the link of a lifting chain or a rope is passed,
  • the point of the hook has a raised central portion thereon on which the grooved lower end of the keeper looks, so that side play of the latter is prevented.
  • Figure 3 is an elevation of the hook with the keeper removed
  • Figure l is an edge view of the latter.
  • the sides of the forked keeper 3 pass one on each side of the flattened upper portion 2 and are pivoted thereto by a pin 4 which is located near the edge of said portion 2 over the hook point.
  • the flattened upper portion of the hook 1 contains an arcuate slot 5 concentric with the keeper pivot pin 4, while opposite and sli htly elongated holes 6 are formed in the sides of the forked keeper 3.
  • the portion 2 has a slight recess 9 merging into the lower end of the slot 5 and ar- Specification of Letters Patent. Patented 31.11, 7, 1922. Application filed November 20, 1920.
  • the hook point is formed with a raised central portion 7 thereon, the latter being located in the same vertical plane as the flattened portion 2 of the hook 1, while the lower end of the keeper 3 is grooved as at 8 to pass on said raised portion 7 and prevent side play of the keeper.
  • the link 10 of a lifting chain or a rope is passed through the holes 6 in the forked keeper and also through the slot 5 in the flattened portion 2.
  • the lower end of the keeper 3 can be raised off the hook point to allow the bight of a rope or a sling to be placed on the hook.
  • the raising of the lower end of the keeper 3 levers the hook 1 upwards until the link 10 or rope engages in the recess 9 in the side of the slot 5, which retains the keeper raised and the hook open until such time as sufficient strain is put on the hook to cause thelattcr to move downwards on the link 10 or rope, the same movementforcing the grooved lower end of the keeper 3 to close on the hook point.
  • the keeper 3 is kept closed by the weight of the suspended load until such time as the weight of the latter is taken off the hook, whereupon the keeper 3 can be opened as before described.
  • a lifting hook having an upper portion containing a slot the lower end of one side edge of which is recessed; a keeper adapted to close on the hook point, pivoted to the upper portion of said hook towards the edge of the latter over the hook point, and containing an elongated hole which registers with said slot, and a member passing through said hole and slot for holding the keeper in closed position.
  • a lifting hook having a flattened upper portion containing a slot, the lower end of one side edge of which is recessed; a forked keeper adapted to close on the hook point, pivoted to said flattened portion towards the edge thereof over the hook point, and containing elognated holes which register with said slot, and a member passing through said holes and slot for holding the keeper in closed position.
  • a lifting hook having a flattened upper portion containing an arcuate slot the lower end of one Sideedge of which is recessed; a forked keeper with a grooved lower end adapted to close on a central raised portion on the hook point, pivoted to saidflattened portion towards the edge of the latter over the hook point and containing elongated holes which register with said slot, and a member passing through said holes and slot for holding the keeper in closed position.
  • a liftlng hook having a flattened upper portion a pivot pin carried by said upper portion, said upper portion being provided with an arcuate slot concentric with said pivot pin, said upper portion also having a 5.
  • a fork-shaped keeper having tines engaging opposite faces of said upper portion and provided with a part engageable with the point of said hook, a pivot pin passing through said keeper and through said hole, the upper portion of said hook being provided with a recess which merges into the lower end of said slot, said keeper being provided with aligned slightly elongated apertures which register with said slot, and a supporting member passing through said slightly elongated holes and through said slot, and adapted when occupying the upper end of said slot to hold said keeper in closed position, and when occupying said recess to hold said keeper in open position,

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Load-Engaging Elements For Cranes (AREA)

Description

W. P. SIMPSON.
SAFETY LIFTING HOOK. APPLICATION FILED NOV. 20, 1920.
1,409,068, Patented Mar. 7, 1922.
FIR-5- Ila/emu HZ 1. 6 0111 9 UNITED STATES PATENT OFFICE.
WILLIAM: PETER SIMPSON, OF HOBSONVILLE, AUCKLAND, NEW ZEALAND.
SAFETY LIFTING HOOK.
To all whom it may concern:
Be it known that, lViLL-nitr Sine son, citizen of New Zealand, residing at Hobsonville, Auckland, has invented certain new and useful Improvements in Safety Lifting Hooks, of which the following is a specification.
This invention relates to hooks used on cranes, derricks and the like for lifting cargo and other loads, and provides an improved form of safety hook forthe aforesaid purpose.
According to the invention the hook is formed with a flattened upper portion on either side of which the sides of a forked keeper pass, said forked keeper being pivoted to the flattened portion near the edge thereof located over or nearest the hook point.
The flattened portion of the hook contains an arcuate slot concentric with the pivot of the keeper, and at the lower end of said slot, in the side edge thereof furthest from the pivot, a slight recess is provided.
Both sides of the forked keeper contain a slightly elongated hole through both of which and the slot in the flattened portion of the hook, the link of a lifting chain or a rope is passed,
The point of the hook has a raised central portion thereon on which the grooved lower end of the keeper looks, so that side play of the latter is prevented.
The invention will be further described with reference to the accompanying drawing, in which Figure l is an elevation of the hook closed,
Figure 2 shows same open,
Figure 3 is an elevation of the hook with the keeper removed, and
Figure l is an edge view of the latter.
In the drawing 1 is the hook and 2 the flattened upper portion of same.
The sides of the forked keeper 3 pass one on each side of the flattened upper portion 2 and are pivoted thereto by a pin 4 which is located near the edge of said portion 2 over the hook point.
The flattened upper portion of the hook 1 contains an arcuate slot 5 concentric with the keeper pivot pin 4, while opposite and sli htly elongated holes 6 are formed in the sides of the forked keeper 3.
The portion 2 has a slight recess 9 merging into the lower end of the slot 5 and ar- Specification of Letters Patent. Patented 31.11, 7, 1922. Application filed November 20, 1920.
Serial No. 425,367.
ranged at the side edge of the slot which is furthest from the pivot pin l.
The hook point is formed with a raised central portion 7 thereon, the latter being located in the same vertical plane as the flattened portion 2 of the hook 1, while the lower end of the keeper 3 is grooved as at 8 to pass on said raised portion 7 and prevent side play of the keeper.
The link 10 of a lifting chain or a rope is passed through the holes 6 in the forked keeper and also through the slot 5 in the flattened portion 2.
Vhen there is no load on the hook l, the lower end of the keeper 3 can be raised off the hook point to allow the bight of a rope or a sling to be placed on the hook. The raising of the lower end of the keeper 3 levers the hook 1 upwards until the link 10 or rope engages in the recess 9 in the side of the slot 5, which retains the keeper raised and the hook open until such time as sufficient strain is put on the hook to cause thelattcr to move downwards on the link 10 or rope, the same movementforcing the grooved lower end of the keeper 3 to close on the hook point.
The keeper 3 is kept closed by the weight of the suspended load until such time as the weight of the latter is taken off the hook, whereupon the keeper 3 can be opened as before described.
hat I do claim and desire to secure by Letters Patent of the United States is 1. A lifting hook having an upper portion containing a slot the lower end of one side edge of which is recessed; a keeper adapted to close on the hook point, pivoted to the upper portion of said hook towards the edge of the latter over the hook point, and containing an elongated hole which registers with said slot, and a member passing through said hole and slot for holding the keeper in closed position.
2. A lifting hook having a flattened upper portion containing a slot, the lower end of one side edge of which is recessed; a forked keeper adapted to close on the hook point, pivoted to said flattened portion towards the edge thereof over the hook point, and containing elognated holes which register with said slot, and a member passing through said holes and slot for holding the keeper in closed position.
3. A lifting hook having a flattened upper portion containing an arcuate slot the lower end of one Sideedge of which is recessed; a forked keeper with a grooved lower end adapted to close on a central raised portion on the hook point, pivoted to saidflattened portion towards the edge of the latter over the hook point and containing elongated holes which register with said slot, and a member passing through said holes and slot for holding the keeper in closed position.
4. A liftlng hook having a flattened upper portion a pivot pin carried by said upper portion, said upper portion being provided with an arcuate slot concentric with said pivot pin, said upper portion also having a 5. The combination with ahook'having a flattened upper portion provided with a pivot hole and an arcuate slotlconcentric with said hole, of a fork-shaped keeper having tines engaging opposite faces of said upper portion and provided with a part engageable with the point of said hook, a pivot pin passing through said keeper and through said hole, the upper portion of said hook being provided with a recess which merges into the lower end of said slot, said keeper being provided with aligned slightly elongated apertures which register with said slot, and a supporting member passing through said slightly elongated holes and through said slot, and adapted when occupying the upper end of said slot to hold said keeper in closed position, and when occupying said recess to hold said keeper in open position, In testimony whereof I aflix' mysignature in presence of two witnesses.
WILLIAM PETER SIMPSON.
US425367A 1920-11-20 1920-11-20 Safety lifting hook Expired - Lifetime US1409068A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5210914A (en) * 1992-04-30 1993-05-18 Katsma Robert W Automatically closing carabiner
US5416955A (en) * 1992-04-30 1995-05-23 Katsma; Robert W. Trigger-closing carabiner
USD628877S1 (en) 2010-06-03 2010-12-14 Master Lock Company Llc Hook
USD629290S1 (en) 2010-06-03 2010-12-21 Master Lock Company Llc Hook
USD633371S1 (en) 2010-06-03 2011-03-01 Master Lock Company Llc Hook

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5210914A (en) * 1992-04-30 1993-05-18 Katsma Robert W Automatically closing carabiner
US5416955A (en) * 1992-04-30 1995-05-23 Katsma; Robert W. Trigger-closing carabiner
USD628877S1 (en) 2010-06-03 2010-12-14 Master Lock Company Llc Hook
USD629290S1 (en) 2010-06-03 2010-12-21 Master Lock Company Llc Hook
USD633371S1 (en) 2010-06-03 2011-03-01 Master Lock Company Llc Hook

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