US3719300A - Hoisting apparatus, more particularly for use in a furnace - Google Patents

Hoisting apparatus, more particularly for use in a furnace Download PDF

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Publication number
US3719300A
US3719300A US00101994A US3719300DA US3719300A US 3719300 A US3719300 A US 3719300A US 00101994 A US00101994 A US 00101994A US 3719300D A US3719300D A US 3719300DA US 3719300 A US3719300 A US 3719300A
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US
United States
Prior art keywords
yoke
lever means
clamp
lever
hoisting apparatus
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
US00101994A
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English (en)
Inventor
F Siegmund
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.)
NL KRAANBOUW MIJ NV
Original Assignee
NL KRAANBOUW MIJ NV
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 NL KRAANBOUW MIJ NV filed Critical NL KRAANBOUW MIJ NV
Application granted granted Critical
Publication of US3719300A publication Critical patent/US3719300A/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
    • 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
    • B66C1/42—Gripping members engaging only the external or internal surfaces of the articles
    • B66C1/425—Gripping members engaging only the external or internal surfaces of the articles motor actuated
    • B66C1/427—Gripping members engaging only the external or internal surfaces of the articles motor actuated by hydraulic or pneumatic motors

Definitions

  • ABSTRACT The invention relates to a hoisting apparatus having a [30] Forelgn Apphcauon Pnority Data yoke, at least two clamping members which are Jan.
  • the invention relates to a hoisting apparatus having a yoke, at least two clamping members which are disposed on the end portions of the yoke and can be moved towards and away from one another, means for driving and controlling the clamping members, and members for moving the yoke.
  • the load to be hoisted is clamped laterally and then displaced.
  • the load can consist of one or more elements. If a number of elements must be displaced simultaneously, the elements are so forced against one another by the exertion of an adequate force on the outermost elements that frictional forces therebetween are greater than the downwardly directed forces generated by the weight of the elements.
  • the shape of the clamping members is adapted to that of the side surfaces of the elements to be clamped by the clamping members.
  • the invention provides a hoisting apparatus of the kind specified wherein during their movement in relation to one another at least one of the clamping members is so guided that it is displaced parallel with itself. Since at least one of the clamping members is displaced parallel with itself, very little displacement is needed for movement from the clamping position into the release position, in contrast with clamping members which can pivot between such positions around a point at their ends.
  • the clamping member is moved via the agency of a lever which can be pivoted in relation to the yoke and moved between two end positions by the control means.
  • Exclusively mechanical means are used to operate the clamping members, more particularly the part moving in the furnace.
  • the clamping force of the clamping members is derived from a force generated by the lever.
  • a weight can be disposed on the end of the lever to obtain an adequate force.
  • FIG. 1 is a partly sectional view of a hoisting apparatus according to the invention.
  • FIG. 2 is a plan view, to an enlarged scale, of the hoisting apparatus shown in FIG. 1.
  • a hoisting apparatus 1 has a substantially horizontal yoke 2 on whose ends clamping members 3, 4 are disposed.
  • the yoke 2 is disposed on the lower end of the innermost tube 5 of a set of telescopic tubes 5 7.
  • a winch drum 9 driven by a motor 8 can move the tubes 5, 6 and therefore the yoke 2 up and down by means of a cable 11 running around a pulley 10.
  • Control means for the clamping members, in the form of a pneumatic cylinder 12 are disposed inside the tube 5.
  • Connected to the piston rod of the pneumatic cylinder 12 is a cable 13 whose end is attached to a lever 14 movable between two end positions. The end positions are determined by a stop 15 on the yoke 2 and a stop 16 on the tube 5 respectively.
  • a lever 14 can move in a slot in the tube 5.
  • a weight 17 is disposed on the end of the lever.
  • the clamping members 3, 4 are connected to the yoke 2 via the agency of strips 18, 19; 20, 21 disposed on the yoke 2 and the clamping members 3 and 4 respectively.
  • the end of the strip 20 forms the pivot of the lever 14.
  • Connected to bent end 22 of the lever is a connecting member 23 of adjustable length connected at its other end to the strip 19.
  • the apparatus operates as follows. To receive a load, e.g., a number of blockshaped elements 24 26, the yoke 2 is lowered until the clamping members 3, 4 are on either side of the elements placed ready.
  • the lever 14 is in its top end position.
  • a downward stroke of the piston in the cylinder 12, due to the weight 17, then moves the lever into its bottom position.
  • the lowest pivoting point of the lever 14 moves to the right, as viewed in the drawing, while the bent end 22 moves to the left.
  • the clamping member 4 consequently moves to the left in relation to the yoke 2, while the clamping member 3 moves to the right.
  • the clamping force is derived from the force generated by the weight 17 and the lever arm.
  • the clamping effect is therefore exerted in the bottom position of the lever, so that if the controlling means happen to fail, the load cannot drop out of the apparatus, this being a very important safety factor.
  • clamping members 3, 4 are displaced parallel with themselves, so that the apparatus can be used in a space which is very limited laterally.
  • the hoisting apparatus can be guided over, for instance, rails. It can also be suspended from a crane or disposed vertically in some other way.
  • a hoisting apparatus comprising, in combination:
  • a yoke in the form of an elongate, horizontal member of selected length
  • a pair of clamp members disposed at the respective opposite ends of said yoke and each having a portion depending below said yoke for engaging against the opposite ends of a load in straddling relation thereto;
  • parallelogram link means suspending at least one of said clamp members from said yoke for movement toward and away from the other clamp member;
  • elevating means connected to said yoke for raising and lowering said yoke without affecting the clamping force exerted by said clamp members as effected by said lever means; and means for selectively pivoting said lever means upwardly to move said one clamp member away from the other whereby to release a load.
  • a hoisting apparatus as defined in claim 1 including second parallelogram link means suspending said other clamp member from said yoke, and a connecting member connected to said one end of said lever means and to said second parallelogram link means to operate said other clamp member in unison with, but in opposite sense to, said one clamp member.
  • a hoisting apparatus as defined in claim 1 wherein said means for elevating comprises a series of telescopic members, the innermost of which is hollow and is connected at its lower end to said yoke, and said means for selectively pivoting said lever means comprises an operating member located in the upper portion of said innermost telescopic member remote from said yoke and a flexible member connected at one end to said operating member and projecting downwardly through said innermost telescopic member into connection with said lever means.
  • a hoisting apparatus as defined in claim 2 wherein said means for elevating comprises a series of telescopic members, the innermost of which is hollow and is connected at its lower end to said yoke, and said means for selectively pivoting said lever means comprises an operating member located in the upper portion of said innermost telescopic member remote from said yoke and a flexible member connected at one end to said operating member and projecting downwardly through said innermost telescopic member into connection with said lever means.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Load-Engaging Elements For Cranes (AREA)
  • Carriers, Traveling Bodies, And Overhead Traveling Cranes (AREA)
US00101994A 1970-01-20 1970-12-28 Hoisting apparatus, more particularly for use in a furnace Expired - Lifetime US3719300A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7000804A NL7000804A (enrdf_load_stackoverflow) 1970-01-20 1970-01-20

Publications (1)

Publication Number Publication Date
US3719300A true US3719300A (en) 1973-03-06

Family

ID=19809141

Family Applications (1)

Application Number Title Priority Date Filing Date
US00101994A Expired - Lifetime US3719300A (en) 1970-01-20 1970-12-28 Hoisting apparatus, more particularly for use in a furnace

Country Status (4)

Country Link
US (1) US3719300A (enrdf_load_stackoverflow)
JP (1) JPS4935376B1 (enrdf_load_stackoverflow)
DE (1) DE2100840A1 (enrdf_load_stackoverflow)
NL (1) NL7000804A (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4133570A (en) * 1977-07-22 1979-01-09 B. V. Nederlandse Kraanbouw Maatschappij Nkm Hoisting apparatus having improved clamping means
EP4108620A1 (en) 2021-06-25 2022-12-28 Reel GmbH Hoisting apparatus
EP4187186A1 (en) 2021-11-29 2023-05-31 Reel GmbH Hoisting apparatus

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3987905A (en) * 1975-01-27 1976-10-26 Harnischfeger Corporation Overhead crane including grapple means
GB2179321B (en) * 1985-08-21 1988-10-26 British Nuclear Fuels Plc An improved lifting apparatus
JPS6330761U (enrdf_load_stackoverflow) * 1986-08-15 1988-02-29

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US796842A (en) * 1904-11-15 1905-08-08 George M Hoffmann Crane.
US1519325A (en) * 1923-09-11 1924-12-16 Pittsburgh Plate Glass Co Plate-glass-turnover frame
US2224913A (en) * 1938-12-13 1940-12-17 Lila T Johnson Material handling apparatus
US3139302A (en) * 1961-09-08 1964-06-30 Molins Machine Co Ltd Mechanical handling apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US796842A (en) * 1904-11-15 1905-08-08 George M Hoffmann Crane.
US1519325A (en) * 1923-09-11 1924-12-16 Pittsburgh Plate Glass Co Plate-glass-turnover frame
US2224913A (en) * 1938-12-13 1940-12-17 Lila T Johnson Material handling apparatus
US3139302A (en) * 1961-09-08 1964-06-30 Molins Machine Co Ltd Mechanical handling apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4133570A (en) * 1977-07-22 1979-01-09 B. V. Nederlandse Kraanbouw Maatschappij Nkm Hoisting apparatus having improved clamping means
EP4108620A1 (en) 2021-06-25 2022-12-28 Reel GmbH Hoisting apparatus
EP4187186A1 (en) 2021-11-29 2023-05-31 Reel GmbH Hoisting apparatus

Also Published As

Publication number Publication date
NL7000804A (enrdf_load_stackoverflow) 1971-07-22
DE2100840A1 (de) 1971-07-29
JPS4935376B1 (enrdf_load_stackoverflow) 1974-09-21

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