US3033402A - Ram truck - Google Patents

Ram truck Download PDF

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Publication number
US3033402A
US3033402A US858634A US85863459A US3033402A US 3033402 A US3033402 A US 3033402A US 858634 A US858634 A US 858634A US 85863459 A US85863459 A US 85863459A US 3033402 A US3033402 A US 3033402A
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United States
Prior art keywords
load
ram
truck
sections
lifting
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Expired - Lifetime
Application number
US858634A
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English (en)
Inventor
James W Leeper
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 and Towne Manufacturing Co
Original Assignee
Yale and Towne 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 Yale and Towne Manufacturing Co filed Critical Yale and Towne Manufacturing Co
Priority to US858634A priority Critical patent/US3033402A/en
Priority to GB31759/60A priority patent/GB909282A/en
Priority to FR841688A priority patent/FR1270483A/fr
Priority to DEY459A priority patent/DE1199694B/de
Application granted granted Critical
Publication of US3033402A publication Critical patent/US3033402A/en
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
    • B66F9/14—Platforms; Forks; Other load supporting or gripping members laterally movable, e.g. swingable, for slewing or transverse movements
    • B66F9/142—Movements of forks either individually or relative to each other
    • B66F9/144—Movements of forks relative to each other - independent

Definitions

  • This invention relates to an industrial lift truck having load members that can be juxtaposed to form a single lifting ram, or that can be separated whereby to form two rams or load forks.
  • a truck of that kind is shown in the earlier patent to Charles S. Schroeder, No. 2,676,723.
  • That truck there are two complementary ram sections that can be juxtaposed to form a single ram that will have a substantially continuous curved load surface, and that may be inserted into an opening in a coil in position to lift the coil. Because the curved surface is substantially continuous, the ram is not likely to damage the load and can be used effectively for lifting rather heavy coils of tin plate. When the sections of the ram are separated, they will present individual curved surfaces that can be used for lifting two coils.
  • the Schroeder construction has been commercially successful, but it has been found that more versatile equipment now is needed to meet the requirements of the industry.
  • I mount a pair of ram sections for individual movement on the lifting carriage of a truck, with each section adapted to move in a linear horizontal direction and also to rotate on its individual mounting.
  • Each ram section is relatively thin in a vertical direction, and has a load surface that will be presented upwardly when the sections are horizontally separated.
  • the sections then can be used as forks to handle a pallet that has low underclearance.
  • the ram sections By moving the ram sections in linear directions toward and away from one another, they will be adjusted for handling a pallet or coil. Those linear movements, with independent vertical adjustment of the lifting carriage of the truck, will enable the truck operator to have very effective control of the ram sections, so that he will find it easy to place the sections in the exact positions to engage the pallet or coil. Moreover, by their horizontal movement the ram sections can be separated different distances for insertion under pallets of different sizes, despite the fact that the pallets may have low underclearance.
  • cam means to control the rotation of the ram sections on their mountings. Those cam means will act automatically when the sections move into juxtaposed relation to one another, whereby to rotate the sections into position forming a single ram. When the ram sections are separated,
  • the cam means will act immediately as the sections start to move out of juxtaposed relation to rotate the sections so as to present their load surfaces in an upward direction.
  • the sections then can be adjusted horizontally to any position that may be desired for handling a particular pallet or load, while each load surface remains upwardly presented to coact with the load.
  • my cam means as to allow bodily side shifting of both ram sections.
  • I utilize a cam plate that can move with the sections as they move horizontally.
  • the ram sections will be rotated and held rotated through contact with the cam plate when in their juxtaposed single ram position, but the sections nevertheless can be side shifted bodily because the cam plate can move with the sections.
  • a side shifting movement of the ram sections can also be achieved when the sections are in separated positions, while a part of the cam means holds the sections so that they do not rotate.
  • the side shifting feature of my invention is in itself of considerable assistance in performing the handling methods to which I have referred.
  • the side shifting will facilitate the exact placing of the pallet.
  • the coil opening is not in position to align with the ram.
  • particular maneuvering of the truck will be unnecessary, since the ram can easily be side shifted to align with the coil opening.
  • FIG. 1 shows a side view of a lift truck utilizing my novel ram assembly
  • FIG. 2 shows a front view of my invention
  • FIG. 3 is a section on the line 33 in FIG. 2;
  • FIG. 4 shows a side shifted position of the ram sections when forming a single ram
  • FIG. 5 shows the sections side-shifted while separated to act as two forks or load members
  • FIG. 6 shows the ram sections separated a relatively short distance for 'coacting with a narrow pallet.
  • FIG. 1 of the drawings I indicate the ram assembly of my invention generally by the numeral 10, and show that assembly mounted on a load carriage 11 at the front of a lift truck T.
  • the load carriage 11 has rather usual roller brackets 12 through which it is mounted for lifting movement on uprights 13 on the truck T, the lifting movement being effected through lifting means 14, as will be understood by those persons skilled in the art.
  • the details of the truck T are not important to an understanding of my invention, but it will be noted that the truck has controls 3 truck operator to control the truck and the handling of a load on the carriage 11.
  • My novel ram assembly utilizes a pair of load engaging complementary ram sections 16, 17 that are well shown in FIGS. 1 and 2.
  • Each ram section 16, 17 has a curved lifting surface 18 that will be presented upwardly when the sections are separated, as shown in full lines in FIG. 2.
  • the sections 16, 17 are adapted to be juxtaposed and rotated, as shown in dot-and-dash lines in FIG. 2, so as to form a single ram with both lifting surfaces 18 providing a substantially continuous load lifting surface for that ram.
  • the ram sections 16, 17 are somewhat like those shown in the Schroeder patent, to which I have already referred. In my invention, how ever, the ram sections or forks 16, 17 and their actuating means do have exceedingly novel features that are important, as will appear.
  • each mounting member 19, 20 is arranged vertically at the front of a carrier plate 21 that forms a part of the truck carriage 11, and has a bracket 22 that slides on the upper edge of the carrier plate 21.
  • a lower portion of each mounting member 19, 20 slides on a bearing or Wear plate 23 on the carrier plate 21, as will be understood from FIG. 3.
  • the carrier plate 21 supports each individual mounting member 19, 20 for horizontal linear sliding in a transverse direction relatively to the truck.
  • each of the load ram sections 16, 17 of my invention relatively thin in a vertical direction, and I form each section with a base portion 34 having on its rear face a shaft 35, each shaft 35 being supported through a bearing 36, one of which is shown in FIG. 3, whereby to rotate on the corresponding mounting member 19 or 20.
  • the arrangement in my preferred construction is such that each ram section 16, 17 will rotate about an axis that is substantially in its load surface 18, as will be appreciated when considering FIG. 2.
  • Each ram section 16, 17 is further supported on its corresponding mounting member 19, 20 through a lower bearing plate 36a, FIG. 3, and a guide 37 that is engaged over a curved upper part 38 on the base 34 of that section.
  • each ram section has a pair of transversely spaced lugs 39, FIG. 2.
  • Those lugs 39 are adapted to slide in contact with transverse surfaces 40 formed on a part of the truck carriage 11, as on the lower edge of front plate 41.
  • the surfaces 40 will coact with the lugs 39 to hold the ram sections 16, 17 against rotation, and with their lifting surfaces 18 presented upwardly.
  • a medial portion 42 of plate 41 whereby to form clearance for one lug 39 on each ram section 16, 17 when the sections move on their mountings toward the center of the truck.
  • the cut away portion 42 may allow the ram sections 16, 17 to rotate on their mountings, but I particularly control that rota tion through a cam plate 43, FIGS. 2 and 3.
  • the cam plate 43 is arranged behind the cut away portion 42 of front plate 41, and is mounted to slide in a transverse direction, as through a guide 44 on plate 41.
  • the cam plate 43 has an opening 47 that is adapted to accept one lug 39 on the base of a ram section 16, 17.
  • cam plate 43 by sliding on its mounting 44, will effectively control the rotation of the ram sections 16, 17, even though the sections are not centered relatively to the truck. Also, cam plate 43 will slide to allow side shifting of the ram sections while the sections are in a juxtaposed single ram position.
  • the ram sections 16, 17 have moved in a linear horizontal direction while moving into juxtaposed relation to one another, and have rotated to their single ram position merely at the end of their linear movement. By stopping the linear movement of the sections 16, 17 at any desired point, those sections will be in position to coact with a pallet of a particular width. By continuing the movement, the sections will form a single ram that is adapted to lift a coil.
  • the cam plate 43 first will act against the lugs 39 that are in the openings 47, thus rotating the ram sections 16, 17 to place their lifting surfaces 18 in upwardly directed position, as shown in FIG. 6. Further separating movement of the sections 16, 17 will take place in a linear horizontal direction, with their surfaces 18 upwardly presented throughout that movement.
  • cam plate 43 can move along with one or both of the sections. If one section is held still, cam plate 43 can be moved by the other section and will rotate both sections.
  • I move my ram sections 16, 17 in a linear horizontal direction I can very readily adjust those sections to positions for handling pallets that may have low under clearance.
  • the sections will have no vertical component of move ment, and in any of those positions can be placed very close to the ground; Moreover, since the sections do not then rotate, their load surfaces 18 will remain in a position presented upwardly to coact with a pallet.
  • I enable vertical adjustments of the ram sections 16, 17 to be controlled always through vertical actuation of the truck carriage 11. Thereby I simplify to a great extent the positioning of the sections relatively to the pallet or other load, whether the sections are separated or in their juxtaposed single ram position.
  • a carriage mounted for lifting movement on the truck, a pair of load engaging members moving vertically with said carriage and having each a load lifting surface, a mounting member supporting each individual load engaging member for movement independently of the other in a transverse direction on said lifting carriage, means mounting each load engaging member for rotation relatively to the carriage, a cam member against which portions on said load engaging members move when said members move into juxtaposed positions relatively to one another on their mountings so as to rotate the members, said members then forming a single ram with the load lifting surface on each load engaging member providing in conjunction with the load lifting surface on the other member a substantially continuous load lifting surface on the single ram, means mounting said cam member for movement with said load engaging members in a transverse direction on said carriage whereby to enable those members to be bodily side shifted when in single ram position, and surfaces on said cam means acting when said load engaging members move away from their said juxtaposed position to rotate those members whereby to place their load lifting surfaces in position for handling a pallet.
  • a carriage mounted for lifting movement on the truck, a pair of loadengaging members moving vertically with said carriage and having each a load lifting surface, a mounting member supporting each individual load-engaging member for linear movement in a horizontal direction toward and away from the other load-engaging member on said lifting carriage, means supporting each load-engaging member for rotation on its mounting member, a cam plate having a part against which portions on said loadengaging members impinge when moving horizontally into juxtaposed positions relatively to one another on their mountings whereby to rotate the members into position forming a single ram, the load lifting surface on each load-engaging member then providing in conjunction with the load lifting surface on the other load engaging member a substantially continuous and upwardly presented load lifting surface on the single ram, means mounting said cam plate for movement with said load-engaging members to enable those members to be bodily side shifted when intheir single ram position, and surfaces on said cam plate coacting with the load-engaging members to rotate those members as they move away from their said juxtaposed
  • a carriage mounted for lifting movement on the truck, a pair of load-engaging members moving vertically with said carriage and having each a curved load lifting surface, a mounting member supporting each individual load-engaging member f r linear movement in a horizontal direction toward and away from the other load-engaging member on said lifting carriage, means supporting each load-engaging member for rotation on its individual mounting member, a cam plate having opposed surfaces against which portions on said load-engaging members impinge when moving horizontally into juxtaposed positions relatively to one another on their mountings whereby to rotate the members into position forming a single ram, the curved load lifting surface on each individual load-engaging member then providing in conjunction with the curved load lifting surface on the other load-engaging member a substantially continuous curved and upwardly presented load lifting surface on the single ram, means mounting said cam plate for transverse movement on the truck carriage, so as to enable said cam plate to move with one or both loadengaging members when moved horizontally on the can riage, surfaces on said cam plate
  • a carriage mounted for lifting movement on the truck and having a carrier member, a pair of fork mounting members supported for movement in a transverse direction on the carrier member of said carriage, a load fork having a base portion mounted for rotation on each fork mounting member and movable transversely with said member, a control part mounted on the carrier member and extending in juxtaposed relation to the base portion of each load fork, the base portion of each fork moving relatively to said juxtaposed control part as the fork moves transversely with its mounting member, and means on said base portions and the juxtaposed control part coacting to rotate said 'base portions when said portions move transversely relatively to said part, whereby to change automatically the angular position of each load fork when the fork moves in a transverse direction relatively to the carriage.
  • a carriage mounted for lifting movement on the truck, a pair of load engaging members moving vertically with said carriage and having each a load lifting surface, a mounting member supporting each individual load engaging member for linear movement in a horizontal direction relatively to the other load engaging member on said lifting carriage, means mounting each load engaging member for rotation relatively to the carriage, cam means on said carriage, surfaces on said cam means coacting with portions on said load engaging members as said members move into juxtaposed positions relatively to one another on their mountings to rotate the load engaging members, said load engaging members then forming a single ram with the load lifting surface on each load engaging member providing in conjunction with the load lifting surface on the other load engaging member a substantially continuous load lifting surface on the single ram, surfaces on said cam means acting when said load engaging members move away from their said juxtaposed position to rotate those members whereby to present their load lifting surfaces for coacting with a pallet, and said load lifting surfaces adapted by the horizontal direction of movement of the load engaging members on their mountings to be placed in positions to handle pallets of different width
  • a carriage mounted for lifting movement on the truck, a pair of load engaging members moving vertically with said carriage and having each a curved load lifting surface, mounting members supporting said load engaging members for linear movement in a horizontal direction between separated and juxtaposed positions relatively to one another on said lifting carriage, means mounting each load engaging member for rotation relatively to the carriage, cam means on said carriage, surfaces on said cam means coacting with portions on said load engaging members as said members move to their said juxtaposed positions to rotate the load engaging members, said load engaging members then forming a single ram with the load lifting surface on each load engaging member providing in conjunction with the load lifting surface on the other member a substantially continuous curved and upwardly presented load l ing surface on the single ram, surfaces on said cam means acting when said load engaging members move away from their said juxtaposed position to rotate those members whereby to present upwardly the load lifting surface on each load engaging member, and parts on said carriage formed with surfaces coacting with the load engaging members to prevent rotation of those members as they move to their said separated positions,
  • a carriage mounted for lifting movement, a pair of load engaging forks, mounting members supporting said forks for horizontal sliding relatively to one another in a linear direction on said carriage, means mounting each fork for rotation relatively to said carriage on an axis extending perpendicularly relatively to said line, each fork being shaped with a longitudinal thin portion adapted for engagement with a pallet having low underclearance when the fork is in one rotated position on its mounting, cam means on said carriage, surfaces on said cam means coacting with parts on the forks to place said forks in a second rotated position when they move into juxtaposed relation to one another on their mountings, and the shape of said longitudinal fork portions contributing complementary curved lifting surfaces that are effective when the forks are in their second rotated position to form a ram with a substantially continuous curved lifting surface.
  • a carriage mounted for lifting movement, a pair of load engaging forks so shaped that each has a relatively thin longitudinal portion, mounting members supporting said forks for horizontal sliding between separated and juxtaposed positions relatively to one another in a linear direction on said carriage, means mounting each fork for rotation relatively to said carriage on an axis extending perpendicularly relatively to said line, said carriage having cam surfaces coacting with portions on the forks when the forks are in separated positions to hold each fork in one rotated position with its thin dimension vertical, whereby said forks are adapted for engagement with a pallet having low underclearance, a cam on said carriage, said cam having surfaces coacting with parts on the forks to place said forks in a second rotated position when they move into juxtaposed positions, the shape of said forks contributing complementary curved lifting surfaces that act when the forks are in their second rotated position to form in effect a single lifting ram, and means mounting said cam to move with said forks when they
US858634A 1959-12-10 1959-12-10 Ram truck Expired - Lifetime US3033402A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US858634A US3033402A (en) 1959-12-10 1959-12-10 Ram truck
GB31759/60A GB909282A (en) 1959-12-10 1960-09-15 Industrial lift trucks
FR841688A FR1270483A (fr) 1959-12-10 1960-10-20 Perfectionnements aux chariots industriels de levage
DEY459A DE1199694B (de) 1959-12-10 1960-11-29 Hublader

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Application Number Priority Date Filing Date Title
US858634A US3033402A (en) 1959-12-10 1959-12-10 Ram truck

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US3033402A true US3033402A (en) 1962-05-08

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US858634A Expired - Lifetime US3033402A (en) 1959-12-10 1959-12-10 Ram truck

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DE (1) DE1199694B (de)
GB (1) GB909282A (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6390763B1 (en) 2000-05-30 2002-05-21 Cascade Corporation Lift truck carriage with improved sideshifter
CN104803323A (zh) * 2015-04-23 2015-07-29 唐山晶玉科技有限公司 一种用于输送线切割料的运送车

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1283153B (de) * 1965-11-12 1968-11-14 Heinz Schmidt Dipl Ing Hublader mit seitenverschieblichen Gabelzinken
US3460700A (en) * 1967-08-21 1969-08-12 Cascade Corp Side-shift apparatus for a lift truck

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2671571A (en) * 1952-05-12 1954-03-09 Valley Evaporating Company Multipurpose fork truck
US2676723A (en) * 1951-10-22 1954-04-27 Yale & Towne Mfg Co Ram construction for industrial lift trucks

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2451943A (en) * 1946-05-20 1948-10-19 Clark Equipment Co Industrial truck
US2601933A (en) * 1949-07-12 1952-07-01 Lucian E Seagraves Freight handling truck or machine
US2709015A (en) * 1952-10-18 1955-05-24 Grand Specialties Company Lifting and stacking trucks
US2788148A (en) * 1953-08-07 1957-04-09 Baker Raulang Co Load carrying industrial truck
GB825702A (en) * 1955-02-16 1959-12-23 John Reginald Sharp Improvements in or relating to load-supporting devices
US2775359A (en) * 1955-07-22 1956-12-25 Russell J Carpenter Paper roll handling attachment for industrial elevating trucks

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2676723A (en) * 1951-10-22 1954-04-27 Yale & Towne Mfg Co Ram construction for industrial lift trucks
US2671571A (en) * 1952-05-12 1954-03-09 Valley Evaporating Company Multipurpose fork truck

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6390763B1 (en) 2000-05-30 2002-05-21 Cascade Corporation Lift truck carriage with improved sideshifter
CN104803323A (zh) * 2015-04-23 2015-07-29 唐山晶玉科技有限公司 一种用于输送线切割料的运送车
CN104803323B (zh) * 2015-04-23 2017-04-19 唐山晶玉科技有限公司 一种用于输送线切割料的运送车

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Publication number Publication date
DE1199694B (de) 1965-08-26
GB909282A (en) 1962-10-31

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