US2448716A - Hook attachment for ladders - Google Patents

Hook attachment for ladders Download PDF

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Publication number
US2448716A
US2448716A US567377A US56737744A US2448716A US 2448716 A US2448716 A US 2448716A US 567377 A US567377 A US 567377A US 56737744 A US56737744 A US 56737744A US 2448716 A US2448716 A US 2448716A
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United States
Prior art keywords
ladder
rung
ladders
hook
hooks
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Expired - Lifetime
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US567377A
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George K Hurd
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Individual
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Priority to US567377A priority Critical patent/US2448716A/en
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Publication of US2448716A publication Critical patent/US2448716A/en
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    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C1/00—Ladders in general
    • E06C1/02—Ladders in general with rigid longitudinal member or members
    • E06C1/34—Ladders attached to structures, such as windows, cornices, poles, or the like
    • E06C1/345—Ladders attached to structures, such as windows, cornices, poles, or the like specially adapted to be installed parallel to the roof surface
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C7/00—Component parts, supporting parts, or accessories
    • E06C7/48—Ladder heads; Supports for heads of ladders for resting against objects
    • E06C7/488—Supports specially adapted to attach a ladder to a ridge of a roof
    • 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.
    • Y10T24/34—Combined diverse multipart fasteners
    • Y10T24/3484—Hook
    • Y10T24/3485—Hook and hook
    • Y10T24/3487—Hook and hook having biasing spring

Definitions

  • the principal object of this-invention is to provide a device for attachment to ladders which will enable them to be securely anchored at the top on a roof, parapet, window sill or other portion of a building where firemen or workmen are required to operate, and to provide a strong device which may be very easily and quickly attached to or detached from any ladder so that it will be rendered safe.
  • the principal feature of the invention consists in the novel construction of a rigid frame adapted to fit between the side bars of a ladder to which are integrally secured a pair of rigid bar hooks which embrace a ladder rung and extend upwardly and outwardly therefrom to overreach the ridge of a roof or other projection to securely engage the same, the central member supporting the hooks having adjustable means for securely engaging the ladder rung adjacent to the rung engaging the hook member.
  • Figure 1 is a side elevational view of a ladder provided with my improved hook attachment shown in operating position with the hooks extending over the ridge of a building.
  • Figure 2 is an enlarged front elevational view of my improved attachment.
  • Figure 3 is a side elevational view of the attachment shown in Figure 2.
  • Figure 4 shows a modification.
  • Roof ladders as used by firemen in the prosecution of their duties are ordinarily provided with hook extensions rigidly secured to the side rails of the ladder, so that the ladder may be hooked over the eave or a ledge or any projection on a building to hold securely by the en- 3 claims.
  • agement of the point of the hook with the enformed of round steel bar stock of suitable dimensions to securely support the long ladder and curved with a suflicient radius to reach well over an eave or roof ridge or a parapet, the end B of said hooks being pointed to enable them to effect a secure grip on any surface.
  • hook members are curved inwardly and upwardly with a short curved hook C which is sufficiently large to embrace the rung D of a ladder.
  • the hooks A are spaced apart a distance sufilcient to permit them being placed between the side rails E of a'ladder and they are rigidly secured in panallelsrelation to each other by welding or brazing to the shortspaced side portions F of a triangular loop G. also formed of round steel bar. stock;
  • the books C project toward the largehooks A and away from the frame G.
  • the frame G is made ofya single length of steel rod: witha cross portion extending between the straight parallel portion-s F and from the straight portions of the bars angle inwardly to meet each other centrally of their width, one end H thereof meeting an obtuse angled bend I in the other portion and being securely brazed or welded thereto.
  • the central extension J of this triangular frame is threaded with a heavy standard thread upon which is threaded a wing nut K.
  • a sleeve L Slidably mounted on this threaded portion J of the frame is a sleeve L which is formed with a lateral hook extension M which is adapted to extend over the ladder rung N next below the rung D.
  • This hooked member is clamped tightly against the rung N by means of the wing nut K and pushing upwardly against the Y frame it holds the hooks C firmly in position against the under side of the upper rung D.
  • this device may be very quickly attached to or detached from a ladder. It is merely necessary to loosen the wing nut K and adjust the sleeve on the threaded stem J of the frame so that the hook M will clear the rung N permitting the device to be simply lifted off the ladder; the device may be simply replaced on any ladder by placing the hooks C to engage the desired rung, then by sliding the sleeve L on the threaded stem of the frame until it engages the next succeeding rung of the ladder and then turning the wing nut down to engage this sleeve and tightening it in place; the device is firmly secured in position, so that it becomes a rigid part of the ladder and will withstand any kind of rough usage and cannot become accidentally misplaced or forcibly torn off.
  • a device such as described is of very simple but efiective construction and its use will enable ladders to be usd in almost any conceivable position with remark-able safety.
  • a device as described may be instantly fitted on any ladder irrespective of the spacing of the rungs.
  • the threading of the frame extension J may be dispensed with and said extension provided with a flange :i at the top and a coil compression
  • a device as claimed in claim 2 having a coiled compression spring engaging the adjustable hook to hold it downwardly in a locked position.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Ladders (AREA)

Description

Sept. 7, 1948. G. K. HURD 2,448,716
'HOOK ATTACHMENT FOR LADDERS Filed Dec. 9, 1944 Irfl/en for. George K. Hurd.
Patented ept "7, 194$ UNITED STATES PATENTI OFFICE T v T 2,448,716
noox ATTACHMENT on LADDERS George K. Hurd, Torontopont ari m. Canada. l Application December 9, 1944, s rial No. 567,377 g 1 c v i The principal object of this-invention is to provide a device for attachment to ladders which will enable them to be securely anchored at the top on a roof, parapet, window sill or other portion of a building where firemen or workmen are required to operate, and to provide a strong device which may be very easily and quickly attached to or detached from any ladder so that it will be rendered safe.
The principal feature of the invention consists in the novel construction of a rigid frame adapted to fit between the side bars of a ladder to which are integrally secured a pair of rigid bar hooks which embrace a ladder rung and extend upwardly and outwardly therefrom to overreach the ridge of a roof or other projection to securely engage the same, the central member supporting the hooks having adjustable means for securely engaging the ladder rung adjacent to the rung engaging the hook member.
In the accompanying drawings, Figure 1 is a side elevational view of a ladder provided with my improved hook attachment shown in operating position with the hooks extending over the ridge of a building.
Figure 2 is an enlarged front elevational view of my improved attachment.
Figure 3 is a side elevational view of the attachment shown in Figure 2. Figure 4 shows a modification.
Roof ladders as used by firemen in the prosecution of their duties are ordinarily provided with hook extensions rigidly secured to the side rails of the ladder, so that the ladder may be hooked over the eave or a ledge or any projection on a building to hold securely by the en- 3 claims. (01. 222 51) agement of the point of the hook with the enformed of round steel bar stock of suitable dimensions to securely support the long ladder and curved with a suflicient radius to reach well over an eave or roof ridge or a parapet, the end B of said hooks being pointed to enable them to effect a secure grip on any surface.
The other end of these hook members are curved inwardly and upwardly with a short curved hook C which is sufficiently large to embrace the rung D of a ladder.
The hooks A are spaced apart a distance sufilcient to permit them being placed between the side rails E of a'ladder and they are rigidly secured in panallelsrelation to each other by welding or brazing to the shortspaced side portions F of a triangular loop G. also formed of round steel bar. stock; The books C project toward the largehooks A and away from the frame G.
i The frame G is made ofya single length of steel rod: witha cross portion extending between the straight parallel portion-s F and from the straight portions of the bars angle inwardly to meet each other centrally of their width, one end H thereof meeting an obtuse angled bend I in the other portion and being securely brazed or welded thereto. The central extension J of this triangular frame is threaded with a heavy standard thread upon which is threaded a wing nut K.
Slidably mounted on this threaded portion J of the frame is a sleeve L which is formed with a lateral hook extension M which is adapted to extend over the ladder rung N next below the rung D. This hooked member is clamped tightly against the rung N by means of the wing nut K and pushing upwardly against the Y frame it holds the hooks C firmly in position against the under side of the upper rung D.
It will be readily appreciated that this device may be very quickly attached to or detached from a ladder. It is merely necessary to loosen the wing nut K and adjust the sleeve on the threaded stem J of the frame so that the hook M will clear the rung N permitting the device to be simply lifted off the ladder; the device may be simply replaced on any ladder by placing the hooks C to engage the desired rung, then by sliding the sleeve L on the threaded stem of the frame until it engages the next succeeding rung of the ladder and then turning the wing nut down to engage this sleeve and tightening it in place; the device is firmly secured in position, so that it becomes a rigid part of the ladder and will withstand any kind of rough usage and cannot become accidentally misplaced or forcibly torn off.
A device such as described is of very simple but efiective construction and its use will enable ladders to be usd in almost any conceivable position with remark-able safety.
It will be appreciated that a device as described may be instantly fitted on any ladder irrespective of the spacing of the rungs.
In the modified structure illustrated in Figure 4 the threading of the frame extension J may be dispensed with and said extension provided with a flange :i at the top and a coil compression The device-can be, readily remove'dbypushingi. down on-the hooks Ate-disengage hooks-01mm the rung D.
What I claim as my invention is: a
1. A hook attachment for ladders con pgising a pair of curved roof engaging hook's formed of bar stock extending downwardlyto overli'e theupper rung on the outward side andcumed 1112 wardly and upwardly to embrace 'the'adiacent rung, a bar steel frame formed of a rig-id trlangular loop having agicentral stem extending rigidly from one. corner; and having thehother core. ners bent into 'gstlfillghtifil parallel. 5 relation and welded to said ;hooks .and .-:supp0rting= them .-;in parallel relation, and .a. rung zhookzaadiustably mounted on the centralvstem of said frame...
2. A hookeattachment; forcladders, comprising a pair oficur-ved-roof engaging hooks having short upturned rung .gengaging shocks, a irigid. eframe:
4 formed of a single length of bar stock bent into a closed Y-shaped frame having the outer sides rigidly secured to the aforesaid hooks and having the lower central stem portion threaded, a nut threaded on said stem, and a hook formed with a sleeve slidably mounted on said threaded stem.
3. A device as claimed in claim 2 having a coiled compression spring engaging the adjustable hook to hold it downwardly in a locked position.
. GEORGEKAHURD.
REFERENCES CITED The following references are of record in the filie; sent-his .1 spat ent LINI'IZEDSTATES PATENTS Number Name Date 31,953 Farrar Apr. 9, 1861 215,729 Foster May 27, 1879 556,464 Hafiermehl Mar. 17, 1896 679359 11 Dinsmore Mil/1223,1897 1,018,'877 Chickering i Fbr27fl' 1912' 1,030,905 Lucas July- 2, 1912 FOREIGN. PATENTS Number; 1' Country ,v Date Great Britain 7.--- .iIuly i30,;'1898,-
US567377A 1944-12-09 1944-12-09 Hook attachment for ladders Expired - Lifetime US2448716A (en)

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3141210A (en) * 1962-05-09 1964-07-21 William J Bryant Cover holddown device
US4279327A (en) * 1980-04-04 1981-07-21 Warren Richard A Ventilating ladder
US4311210A (en) * 1980-10-09 1982-01-19 Jackson Jacob J Multi-purpose ladder attachment
US4678061A (en) * 1986-02-06 1987-07-07 Jordan Mark T Ladder roof brace
FR2624548A1 (en) * 1987-12-10 1989-06-16 Daforib Sarl Device for anchoring a ladder to a building
US6158549A (en) * 1998-11-03 2000-12-12 Hartman, Jr.; Charles N. Peak hook for supporting a ladder from the peak of a pitched roof
US20050284703A1 (en) * 2004-06-29 2005-12-29 Deuer Joseph F Mid-span fall protection system
US20060000674A1 (en) * 2004-06-30 2006-01-05 Werner Co. Fall arrest system with anchorage plate
US7044270B1 (en) 2004-06-30 2006-05-16 Werner Co., Posting ladder
US7131516B1 (en) 2004-03-29 2006-11-07 Henry Krol Safety and accessibility assembly
US20090000868A1 (en) * 2003-07-30 2009-01-01 Gaines Robert G Ladder Docking Device
US20160130876A1 (en) * 2014-11-06 2016-05-12 Slator, LLC Roofing ladder bracket and safety equipment
US20170030142A1 (en) * 2012-10-09 2017-02-02 Wing Enterprises, Incorporated Ladder securing apparatuses, ladders incorporating same and related methods

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US31963A (en) * 1861-04-09 Adjustable ladder-hook
US215729A (en) * 1879-05-27 Improvement in adjustable ladder-hooks
US556464A (en) * 1896-03-17 Attachment for ladders
US579359A (en) * 1897-03-23 dinsmore
GB189816651A (en) * 1898-07-30 1899-06-02 Herbert Charles Osborn Improvements in Hooks for Use in connection with Ladders and the like.
US1018877A (en) * 1911-11-20 1912-02-27 Frank W Chickering Ladder-hook.
US1030905A (en) * 1911-10-25 1912-07-02 Herbert S Tompkins Detachable ladder-hook.

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US31963A (en) * 1861-04-09 Adjustable ladder-hook
US215729A (en) * 1879-05-27 Improvement in adjustable ladder-hooks
US556464A (en) * 1896-03-17 Attachment for ladders
US579359A (en) * 1897-03-23 dinsmore
GB189816651A (en) * 1898-07-30 1899-06-02 Herbert Charles Osborn Improvements in Hooks for Use in connection with Ladders and the like.
US1030905A (en) * 1911-10-25 1912-07-02 Herbert S Tompkins Detachable ladder-hook.
US1018877A (en) * 1911-11-20 1912-02-27 Frank W Chickering Ladder-hook.

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3141210A (en) * 1962-05-09 1964-07-21 William J Bryant Cover holddown device
US4279327A (en) * 1980-04-04 1981-07-21 Warren Richard A Ventilating ladder
US4311210A (en) * 1980-10-09 1982-01-19 Jackson Jacob J Multi-purpose ladder attachment
US4678061A (en) * 1986-02-06 1987-07-07 Jordan Mark T Ladder roof brace
FR2624548A1 (en) * 1987-12-10 1989-06-16 Daforib Sarl Device for anchoring a ladder to a building
US6158549A (en) * 1998-11-03 2000-12-12 Hartman, Jr.; Charles N. Peak hook for supporting a ladder from the peak of a pitched roof
US20090000868A1 (en) * 2003-07-30 2009-01-01 Gaines Robert G Ladder Docking Device
US11180956B2 (en) * 2003-07-30 2021-11-23 Robert G Gaines Ladder docking device
US7131516B1 (en) 2004-03-29 2006-11-07 Henry Krol Safety and accessibility assembly
US20050284703A1 (en) * 2004-06-29 2005-12-29 Deuer Joseph F Mid-span fall protection system
US7219766B2 (en) 2004-06-29 2007-05-22 Deuer Joseph F Mid-span fall protection system
US7044270B1 (en) 2004-06-30 2006-05-16 Werner Co., Posting ladder
US20060000674A1 (en) * 2004-06-30 2006-01-05 Werner Co. Fall arrest system with anchorage plate
US20170030142A1 (en) * 2012-10-09 2017-02-02 Wing Enterprises, Incorporated Ladder securing apparatuses, ladders incorporating same and related methods
US10760338B2 (en) * 2012-10-09 2020-09-01 Wing Enterprises, Incorporated Ladder securing apparatuses, ladders incorporating same and related methods
US20160130876A1 (en) * 2014-11-06 2016-05-12 Slator, LLC Roofing ladder bracket and safety equipment
US9951557B2 (en) * 2014-11-06 2018-04-24 Slator, LLC Roofing ladder bracket and safety equipment

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