US3528580A - Lift truck carriage and fork therefor - Google Patents

Lift truck carriage and fork therefor Download PDF

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Publication number
US3528580A
US3528580A US689015A US3528580DA US3528580A US 3528580 A US3528580 A US 3528580A US 689015 A US689015 A US 689015A US 3528580D A US3528580D A US 3528580DA US 3528580 A US3528580 A US 3528580A
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US
United States
Prior art keywords
fork
hanger
block
notch
load
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
US689015A
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English (en)
Inventor
Oswald S Carliss
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.)
Yale Materials Handling Corp
Original Assignee
Eaton Yale and Towne Inc
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 Eaton Yale and Towne Inc filed Critical Eaton Yale and Towne Inc
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Publication of US3528580A publication Critical patent/US3528580A/en
Assigned to YALE MATERIALS HANDLING CORPORATION ROUTE 523 AND 31 FLEMINGTON NEW JERSEY 08822 reassignment YALE MATERIALS HANDLING CORPORATION ROUTE 523 AND 31 FLEMINGTON NEW JERSEY 08822 ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: EATON CORPORATION
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
    • B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
    • B66F9/075—Constructional features or details
    • B66F9/12—Platforms; Forks; Other load supporting or gripping members

Definitions

  • a load fork is mounted on the load support plate of a lift truck utilizing a hanger block that has a lower portion extending in position between the forward surface of the plate and a rear surface on the upper portion of the fork. Welds extend around the periphery of the block including its lower portion to secure the block to the fork.
  • the rear surface of the lower block portion extends upwardly and forms the forward surface of an internal hanger notch that is considerably above the bottom line of the block, and that engages the upper edge of the support plate.
  • a principal line of load force will pass through the rear surface of the notch and above the bottom weld.
  • the upper portion of the fork is tapered to place its forward surface in vertical position while supported through the hanger block, and reducing the weight of the fork.
  • This invention relates to the mounting of a load carrying member such as a load fork to the load carriage of an industrial truck.
  • a load carrying member such as a load fork
  • many mounting devices have been designed for the purpose, and in the main, they include a hanger that is secured to the upper end of the fork or other load carrying member and that will engage over the upper horizontal edge of a vertical plate that forms a part of the load carriage.
  • hangers of the particular class so as to form a notch between the hanger and a surface of the load fork. It has been found extremely difficult to secure the hanger so as to yield a notch that will fit the carriage plate with sufficient accuracy. While a certain clearance may be permitted, the clearance cannot be effectively controlled when forming the hanger notch simply through the assembly of a hanger to a fork.
  • Welding is much to be preferred as a means for securing a hanger to a fork. Because of the very heavy loads that are applied against the hanger, it is extremely important that the welds be positioned for accepting effectively the strains and stresses to which the hanger will be subjected. Fully effective positioning of the welds is not possible with existing constructions, due to the presence of the notch between the hanger and fork.
  • novel hanger that I set forth in this application is extremely simple, but it nevertheless departs radically from the prior art and yields an extremely strong and effective hanger. At the same time, it permits the forming of a notch that will coact accurately and effectively with a carriage plate, with tolerances that are accurately determined. Also, it permits a strong weld without lowering the hanger position and without obstructing the assembly of the fork to the carriage of the truck.
  • I utilize to form a fork hanger a block on which are surfaces that contribute a hanger notch, and also a further surface that does not form a part of the notch and that will lie against the surface of a fork so as to position the notch relatively to the fork.
  • that surface ofthe hanger block which lies against the fork is separate from the surfaces forming the hanger notch so that welding of the block to the fork will not affect the notch.
  • the coac-ting surfaces of the hanger block and fork will properly position the hanger notch, and it is possible also to form that notch with accurate tolerances.
  • the hanger notch will be formed in an internal position which will be well above the lowermost weld securing the block to the fork. Even more particularly, the lowermost weld will be on a lower portion of the block lying in position between the fork and the forward surface of the support plate that is engaged by the hanger block. The welds then will be in a position to accept very effectively the load stresses on the hanger block, and this in itself is an important feature of my invention.
  • FIG. 1 shows a lift truck that utilizes the novel fork mounting of my invention.
  • FIG. 2 shows a side view of the mounting and fork.
  • FIG. 1 a usual type of lift truck T on which my novel fork mounting 10 supports a pair of load forks 11.
  • the lift truck T is quipped with a load carriage 12 that is mounted for lifting movements 'on uprights 13 and that includes a substantially vertical load support plate 14 on which may be mounted various load members, as for example the forks 11.
  • Each fork 11 that I show has an L-shape comprising a part 15 that extends forwardly for engaging a load, and a vertical part 16 that is applied to the load support plate 14 on the carriage.
  • My novel mounting 10 will hang each fork 11 on the upper edge of support plate 14, utilizing the much improved construction that I shall describe.
  • the fork 11 also will bear against a lower portion of plate 14 where it will be held by a clip 16a against reverse pressures, as will be understood.
  • the novel mounting 10 of my invention comprises a hanger block 17 that is applied with its forward surface against an upper portion of a rear surface 18 of the fork 11.
  • the lower block portion 19 has a rear surface 211 that I form to extend upwardly to a point within the hanger block 17, and that contributes the forward surface of a hanger notch indicated generally by the numeral 22.
  • That notch 22 has an upper end surface 23, and an inclined rear surface 24 extending from surface 23 downwardly and terminating at a point which is considerably above the bottom line of hanger block 17.
  • the upper edge of the load support plate 14 has a surface 26 which is inclined so as to coact with the inclined notch surface 24, and I prefer to shape the plate edge to coact also with surface 25.
  • notch 22 ' is an internal' notch and the peripheral surfaces of block 17 can extend in juxtaposed relation to the rear surface 18 of fork 11. Those surfaces then are fully accessible and permit the proper application of a strong and effective weld at any point around the periphery of the forward surface of block 17.
  • I may easily apply a weld 27 on the bottom line of hanger block 17, that is, on lower portion 19, as well as a top weld 28 and opposite side welds 29, one of which side welds is seen in FIG. 2.
  • the bottom weld 27 in my novel fork mounting will act to extremely good effect. That is due to the fact that it is in a position that enables it to be formed through a welding operation that is efficient, and further because it will lie a considerable distance below the load bearing surfaces of the internal notch 22. That may be better understood when it is realized that the rear notch surface 24 will accept a very large part of the stresses which are due to a load, as indicated for example by the line of force F.
  • the line F will extend above the bottom weld 27, reducing to a considerable extent the amount of stress through weld 27.
  • a load carriage having a substantially Vertical load support plate that presents a forward surface and upper and lower edges
  • a load fork having a substantially vertical part formed with a rear surface that rests against the forward surface of the load support plate
  • a hanger block having a forward surface secured by welding to an upper portion of said rear surface of the fork part, said hanger block formed with a vertical notch engaging the upper edge of the support plate whereby to support said load fork 0n the carriage
  • the improvement that comprises said rear surface of the fork part inclined away from said forward surface of the support plate so as to leave a space between the upper portion of said rear surface and said support plate, said hanger block formed to include a lower portion lying in said space, the forward surface of the hanger block extending on said lower portion, said welding including a weld extending on a bottom line on said lower portion of the hanger block, and a rear surface of said lower block portion extending upward on said block and forming a forward surface of said hanger notch, said fork part being tapered

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Forklifts And Lifting Vehicles (AREA)
US689015A 1967-12-08 1967-12-08 Lift truck carriage and fork therefor Expired - Lifetime US3528580A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US68901567A 1967-12-08 1967-12-08

Publications (1)

Publication Number Publication Date
US3528580A true US3528580A (en) 1970-09-15

Family

ID=24766730

Family Applications (1)

Application Number Title Priority Date Filing Date
US689015A Expired - Lifetime US3528580A (en) 1967-12-08 1967-12-08 Lift truck carriage and fork therefor

Country Status (3)

Country Link
US (1) US3528580A (enrdf_load_stackoverflow)
DE (1) DE1813382A1 (enrdf_load_stackoverflow)
GB (1) GB1238228A (enrdf_load_stackoverflow)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4599038A (en) * 1983-11-07 1986-07-08 Jos. Dyson & Sons, Inc. Fork for a lift truck vehicle
US4961681A (en) * 1989-12-07 1990-10-09 Threatt Raymond W Chuck for attaching utility vehicle accessories
US5087167A (en) * 1989-05-25 1992-02-11 Allegheny Ludlum Corporation Lifting shoe assembly for use on sheet lifters
EP1334948A1 (de) * 2002-02-07 2003-08-13 Vetter Umformtechnik GmbH Lastaufnahmemittel
US20090065308A1 (en) * 2007-09-07 2009-03-12 Emilio Bolzoni Variable-section fork for fork-lift trucks
USD789017S1 (en) 2015-01-13 2017-06-06 Arrow Acquisition, Llc Fork lift fork
USD789018S1 (en) * 2015-01-13 2017-06-06 Arrow Acquisition, Llc Fork lift fork
USD789646S1 (en) * 2015-01-13 2017-06-13 Arrow Aquisition, Llc Fork lift fork
USD789647S1 (en) * 2015-01-13 2017-06-13 Arrow Acquisition, Llc Fork lift fork
USD794898S1 (en) * 2015-01-13 2017-08-15 Arrow Acquisition, Llc Fork lift fork
USD881500S1 (en) 2017-12-14 2020-04-14 Arrow Acquisition, Llc Fork lift fork
USD914322S1 (en) * 2017-12-14 2021-03-23 Arrow Acquistion, LLC Fork lift fork

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3301756A1 (de) * 1983-01-20 1984-07-26 Arnold Vetter Kg, 5900 Siegen Gabelzinke fuer stapler
DE3340286C1 (de) * 1983-11-08 1985-05-15 Carl Falkenroth Söhne GmbH & Co KG, 5885 Schalksmühle Gabeltraeger fuer insbesondere Hubstapler
DE3421621C2 (de) * 1984-06-09 1994-05-26 Kaup Gmbh & Co Kg Befestigungsvorrichtung zur Verbindung eines Trageprofils einer Klammervorrichtung mit einer Klammerzinke
DE3905981A1 (de) * 1989-02-25 1990-09-06 Kaup Gmbh & Co Kg Vorsatzgeraet fuer einen gabelstapler mit zwei seitlich verschiebbaren gabelzinken

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU171318A1 (ru) * Всесоюзный научно исследовательский институт железнодорожн СМЕННОЕ ГРУЗОЗАХВАТНОЕ ПРИСПОСОБЛЕНИЕ К АВТОПОГРУЗЧИКУПАТЕИТНО- TEX?[R!:ECi;A2 БРБЛИаТГ[.ЛII
US1884908A (en) * 1929-10-09 1932-10-25 Baker Raulang Co Industrial truck
US2348899A (en) * 1942-11-02 1944-05-16 Pioneer Engineering Works Inc Loader
US2386759A (en) * 1944-06-06 1945-10-16 John B Ulm Detachable boom for industrial trucks
US2411263A (en) * 1945-08-13 1946-11-19 Towmotor Corp Industrial truck
US2904203A (en) * 1956-12-24 1959-09-15 Clark Equipment Co Lift truck
US3027033A (en) * 1959-09-04 1962-03-27 Allis Chalmers Mfg Co Fork position locking device
US3199697A (en) * 1962-09-06 1965-08-10 Lamson & Sessions Co Lifting and dumping apparatus
US3356241A (en) * 1965-08-02 1967-12-05 Allis Chalmers Mfg Co Fork lock
US3387731A (en) * 1967-01-04 1968-06-11 Raymond Corp Fork truck

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU171318A1 (ru) * Всесоюзный научно исследовательский институт железнодорожн СМЕННОЕ ГРУЗОЗАХВАТНОЕ ПРИСПОСОБЛЕНИЕ К АВТОПОГРУЗЧИКУПАТЕИТНО- TEX?[R!:ECi;A2 БРБЛИаТГ[.ЛII
US1884908A (en) * 1929-10-09 1932-10-25 Baker Raulang Co Industrial truck
US2348899A (en) * 1942-11-02 1944-05-16 Pioneer Engineering Works Inc Loader
US2386759A (en) * 1944-06-06 1945-10-16 John B Ulm Detachable boom for industrial trucks
US2411263A (en) * 1945-08-13 1946-11-19 Towmotor Corp Industrial truck
US2904203A (en) * 1956-12-24 1959-09-15 Clark Equipment Co Lift truck
US3027033A (en) * 1959-09-04 1962-03-27 Allis Chalmers Mfg Co Fork position locking device
US3199697A (en) * 1962-09-06 1965-08-10 Lamson & Sessions Co Lifting and dumping apparatus
US3356241A (en) * 1965-08-02 1967-12-05 Allis Chalmers Mfg Co Fork lock
US3387731A (en) * 1967-01-04 1968-06-11 Raymond Corp Fork truck

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4599038A (en) * 1983-11-07 1986-07-08 Jos. Dyson & Sons, Inc. Fork for a lift truck vehicle
US5087167A (en) * 1989-05-25 1992-02-11 Allegheny Ludlum Corporation Lifting shoe assembly for use on sheet lifters
US4961681A (en) * 1989-12-07 1990-10-09 Threatt Raymond W Chuck for attaching utility vehicle accessories
EP1334948A1 (de) * 2002-02-07 2003-08-13 Vetter Umformtechnik GmbH Lastaufnahmemittel
US20090065308A1 (en) * 2007-09-07 2009-03-12 Emilio Bolzoni Variable-section fork for fork-lift trucks
USD789017S1 (en) 2015-01-13 2017-06-06 Arrow Acquisition, Llc Fork lift fork
USD789018S1 (en) * 2015-01-13 2017-06-06 Arrow Acquisition, Llc Fork lift fork
USD789646S1 (en) * 2015-01-13 2017-06-13 Arrow Aquisition, Llc Fork lift fork
USD789647S1 (en) * 2015-01-13 2017-06-13 Arrow Acquisition, Llc Fork lift fork
USD794898S1 (en) * 2015-01-13 2017-08-15 Arrow Acquisition, Llc Fork lift fork
USD881500S1 (en) 2017-12-14 2020-04-14 Arrow Acquisition, Llc Fork lift fork
USD914322S1 (en) * 2017-12-14 2021-03-23 Arrow Acquistion, LLC Fork lift fork

Also Published As

Publication number Publication date
GB1238228A (enrdf_load_stackoverflow) 1971-07-07
DE1813382A1 (de) 1969-09-25

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Legal Events

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AS Assignment

Owner name: YALE MATERIALS HANDLING CORPORATION ROUTE 523 AND

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:EATON CORPORATION;REEL/FRAME:004261/0903

Effective date: 19831231