US 1990905 A
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Description (OCR text may contain errors)
Feb. 12,1935.- w R HASTY 1,990,905
DEVICE ,FOR REMOVING CONCRETE MOLDS Filed Dec. 11, 1953 'Illlllmg I I I Patented Feb. 12, 1935 Device FOR REMOVING CONCRETE MOLDS William Roy Hasty, Atlanta, .Ga., assignor of'onehalf to Henry E. Fieldsand Horace F; Fields,
Application December ll, 1933, Serial No. 701,837
This invention relates to a device for expeditiously removing a form from concrete or like substance, wherein the substance is poured or applied to the form in a plastic or semi-plastic state and allowed to set or harden before removal of the form is effected.
In concrete construction it is prevalent to use metallic forms embedded in the material, and which after the latter has set or hardened, are difficult to remove without injury or damage to the form and marring of the molded surface, and therefore, one of. the principal objects of this invention is the, provision of a device attachable to the formand designed to support and at the .same time exert force in removing direction soas to effect removal of the form fromthe molded surface of the material without injury to either the mold or-surface of the. material.
Another important object of this invention is;
the provision of a device of .thischaracter adapted to support or brace the top portion of the mold and at the same time'exert adownward and inward force on the respective sides thereof to effect separation of the mold from the: molded surface, of the materialcommencing at its free edges and. progressively extending in meeting direction towards the center-of the top "portion, and without damage to either the mold'ormolded surface of the material.
With these and other objects in'view, which will become apparent asthedescription proceeds; the invention resides inthe construction, combination and--- arrangement of parts, hereinafter more fully described and claimed, and illustrated in the accompanying drawing; in ewhich like characters of reference indicate like throughout the several figures, of which:
Fig. 1 is a perspective view of. my improvedmold removing, device. 1
Fig.2, isa cross sectional .view of a mold and end elevation of the: device partlyin section and: operatively attached thereto.
Fig. 3 is a similar view to Fig; 2 after the device has been partially operated in mold removing direction and. showing the mold as substan-- tially-removed from-the molded material.
Means heretofore employed for removing concrete molds withwhich I am familiar have proven. deficient in. many respects. For instance, such. means being intended primarily as a supporting or bracing structure adapted to prevent collapse or distortion of the mold during the molding operation, usually embodying a. frame work' which in course of dismantling or removal might; be utilizedto assist in, effecting removal of. the.
parts moldv but with more; or less disastrous results to both the mold and contactingsurface as well, and it was to overcome, such deficiencies by providing. a. devicecomprising a fulcrum lever. having a brace or supporting means adapted to engagethe top of themold pivotally and resiliently connected. thereto, and arms pivotally connected to said lever adapted to grippingly engage the opposite edges of. the mold, soythat operation of said lever effects removal of the mold from the contacting surfaceof theconcrete or other material without damage to either the, mold, or molded surface, that I designed the. mold removing deviceforming. the subject matter of this invention.v
Inthe illustrated embodiment characterizing this invention. there is showna mold removing device A. andaconcrete mold B. Said, device A comprises a. fulcrum lever 1 formed with a roundedhook like depending end 2fand asubstantially normally upright standard or Supporting brace 3. slotted at. its lower. end as at 4 adapted to re.-
ceive the lower end of lever 1' to which it is piv-,
extending 'through. aperture; 1-1 and by means of. which said standard is normally maintained in substantial vertical relation with respect to lever 1 during operative positioning of the device, said spring and the. shape of: end 2permittinglimited pivotal movementv of said lever with respect to said standard without affecting the relative position of the latter with respect tc.mold.B,,as-will hereinafter more fully appear.
An anchor block 12isformedat one end with, a slot 13- adapted. to receive: the upper, edge of lever 1 and to which it is pivotally connected by pin 14. at a point. predeterminedlyspaced from standard 3. Pin: l4v is suitably and detachably secured in said block. The upper end. of said block. is; formed;- with': a, pairof upstanding spaced ears. 15 at right angles to slot 13 and between which arepivotedithe inner'ends of the respective cross arms, 16. on pin 17: similarly and detachably securedthereto.
Mounted in therespective free ends of arms 16 is a substantially U-shaped member 18 comprising the. complemental plates 19 between which is arms 16 withrespect'to different widths of moldseach of said arms is formed adjacentits inner-end pivotally secured said end by pin 18', thereby permitting said member to remain in horizontal or normal gripping position when in engagement with the sides of the pan or mold B and preventing bending of said sides, irrespective of the movement of arms 16, as clearly shown in Fig. 3 of the drawing. The outer stem portions of each pair of plates, inthe present instance, are bent into overlapping. relation and if [desiredmay be welded or otherwise suitably connected to form the stem member 20 the inner face of which is serrated or formed with teeth 21. While I have preferably shown member 18 as formed from plates 19, it is apparent that, if desired, they may be formed from suitably recessed blocks] A lock member 22 formed with a handle 23 extending upwardly at an angle therefrom ,is hingedly mounted in slot 24 formed in stem 25 between plates 19 of each member 18 on ;pin 26- extending therethrough. Each of said members 22 is adapted toextendintermediate the respective stems 20 and 25 and is formed with a curved edge 2'7 extending from the base of handle 23 to apoint 28 which is adapted when in lowered position to be spaced from teeth 21 a distance substantially equal tothe thickness of side 29 andto contact the inner surface of said side adjacent its lower edge in gripping engagement when handle 23 is moved in a downward direction or side 29 in an upward'direction since-as point 28 moves upward it also moves toward teeth 21 as will be more fully hereinafter showns. v A
In order to'permit tensioning of spring 9 and adjustment of arms 16 with respect to standard 3, lever 1 adjacent its upper edge is formed with a series of apertures 11, and in order to adjust with a plurality of apertures 35; It is, however,
apparent that said device'is applicable'to a considerable variation in mold widths without necessitating such adjustment.
The mold B is formed with sides 29 and top 30, shown in Fig. 2 as embedded in the concrete or 1 other moldable material 32, a'ndin viewof its shape is commonly referred to as a pan, and the devicefor effecting its removal may therefore bedesignated in this connection as a panpuller,
since in effect-its actionis'to pull the pan away from the molded face'of-the' material 32.-
. While the'operation of the'device would seem to be clear from the above description, it might be well to further state that to oper'ativelyposition the device it is'only necessary to position the plate 6 against thetop' 30' of 'mold' B- and 7 insert the lower edges of sides- 29 between the members22 and teeth 21, the curved 'faces 27 permitting easy insertion of said edges, arms 23 tending to maintain points 28 in contact with sides 29,-or if desired a slight downward 'movement of said arms 23 or upward movement of sides :29 will causesaid pointstofirmly contact said sides so that when force is-a'pplied to lever 1 said edges will be firmly gripped; and an upward pressure through standard 3 willbe exerted against plate '6 and top '30, and owing to the pivotal connection-of arms l6 as at 17, as lever 1 is operated in a downward or outwarddirection with respect to said mold the sides 29 will be drawn downwardly and inwardly in meeting di-' motion and away from the'molded surface 31 of concrete or other material 32 progressively from the lower edge of 'sa'id'surfacetoward the center of the top portion as at"33, thereby peeling as it were, the moldfrom said surfacesothat when the r be clear without further description.
operation has progressed as shown in Fig. 3 the mold is ready to be completely removed from.
expeditiously attached to the mold and so constructed that when the device is operated in removing direction the distribution of forces will be in top supporting direction and simultaneously 'in side'collapsing or removing directions, whereby damage to the mold is prevented and its expeditious removal from the molded surfaces is effected. T
' From the above it will be noted that I'havedesigned a device'forremoving molds from con crete and the like, simple in'constructi'on, comprising few parts,foldable into a compact form, readily attachable to and-detachablefrom the mold, adjustable to different sized molds, manufacturable at a minimum of cost, and efficient for thepurposes intended. I I
Although in practice I have found that the form of my invention illustrated in the accompanying drawing andreferred'to inthe above description as the preferred embodiment'is the most efiicient and practical, yet realizing that conditions concurrent with the adoption of my invention'will necessarily vary, I desire to emphasize that various minor changes in details of construction, proportion and arrangement of parts,
may be resorted to within the scope of the appended claims without departing from or 'sacriflcing anyof-the-principles of this invention.
Having thus described my inventiomwhat I desire protected by Letters Patent is as set forth in the following claims:
'1. A device for removing molds from concrete and the like comprising a lever element, a mold engaging standard'connected to one end'of said lever and movable through a vertical arc, opp0-' sitely extending armsconnected to said lever and movable through-arcs at right angles to that of said standard, "and means for gripping the sides of the mold movably connected tosaid arms. 2. A device for removing molds 'from'concrete and the like comprising a lever element, a mold engaging standard connected to-one'end of said lever and movable through a vertical arc, oppositely extending arms connected at their meeti ends to said leverand movable through arcs at right angles to that of saidstandard, andmeans for gripping the sides of the mold movably connected tothe free ends of said arms.
3. A device for removing molds from concrete and the likecomprising a leverelement, a mold engaging standard connected to'oneend of said lever and movable through a vertical arc, oppositely extending arms connected at their meeting ends to said lever and movable through arcs similar to and also at right angles to that of said standard, and means'for gripping the sidesof the mold movably connected to said arms.
4.:A device for removing molds from concrete and the like comprising a lever, a mold engaging standard connected to one end of said lever movable in an arc lengthwise of said lever, oppositely extendingtarms connectedto said lever adjustable with respect to each other and movable in arcs parallel to said lever and also in arcs at right angles to the arc of said standard, and means movably connected to the free ends of the arms including gripping jaws adapted to grippingly engage the sides of the mold.
5. A device for removing molds from concrete and the like comprising a lever, a mold engaging standard resiliently connected to one end of said lever movable in an arc lengthwise of said lever, oppositely extending arms connected to the lever adjustable with respect to each other and movable in arcs at right angles to the arc of said standard, and gripping elements including fixed and movable jaws movably connected to the free ends of said arms adapted to grippingly engage the sides of the mold.
6. A device for removing molds from concrete and the like comp-rising a lever, a standard con nected to one end of the lever, a plate movably connected to the free end of said standard adapted to engage the top of the mold, said standard being movable through a vertical arc with respect to said lever and plate, oppositely extending arms pivotally connected to said lever and movable through arcs at right angles to that of said standard, and means for gripping the sides of the mold movably connected to the free ends of the arms.
7. A device for removing molds from concrete and the like comprising a lever, a standard resiliently connected to one end of the lever adapted to engage the top of the mold, said standard being movable through a vertical arc, oppositely extending arms pivotally connected at their inner ends to said lever at a point spaced from said standard and movable through arcs at right angles to that of said standard, and gripping means normally seating on said arms and pivotally connected at their outer ends to' the free ends of said arms to grippingly engage the sides of the mold, whereby movement of said lever in mold removing direction maintains said standard in supporting engagement with the top of the mold, depresses the inner ends of said arms drawing the sides and bottom downwardly and inwardly away from the surrounding concrete and without changing the gripping relation of the gripping means with respect to the sides of the mold.
WILLIAM ROY HASTY.