Taking bucket.
AS AFRICAN AND MALAGASY P. 887 Yaounde (Cameroon) PATENT International Patent Classification: 66 № 00874 b. o.cm ïpïp.i. THE V * 11 To 15 hr 22 December 1964 requested Mn to ioio.a.m.p.i. (G.P. no. 50,962) by the Company called: Yumbo, residing in France. Delivered 22 March 1968, published at The present invention essentially relates to a grab of the type comprising two shells pivotally steered by a cylinder consisting of a stationary body forming piston and supporting said shells and by moving gear connected thereto. Buckets of this type are intended to equip the earthmoving machines Known pick-up buckets of the type described above, in which the shells are carried by a spreader bar rotatably mounted to the lower portion of a piston whose rod is fixed to the sag of the handling vehicle or the like. This piston slides on the movable cylinder connected, by means of connecting rods, said shells. The skips known have various disadvantages due in particular to the mode of attachment of the lifting beam carrying the shells, this attachment being made to the lower portion of the piston thereby forcing the latter to pass through the moving equipment at its two ends. This arrangement complicates the manufacture of the cylinder substantially by causing particularly providing sealing members at both ends of the moving equipment. In addition, the need to extend the piston or providing a rod extending it to secure the bucket leads to eliminate or at least reduce one of its working faces. The skips furthermore have a further disadvantage due to their mounting rotatable relative to the stationary member of the jack. The skips are indeed subject to assume, during the maneuvering of the shells, an untimely rotation which will put off-loading and unloading. Finally, the forces that are exerted by the materials handled on the shells and are reflected on the moving equipment, simply mounted slidably on the fixed body, cause a deformation and rapid wear of the cylinder. The grab according to the present invention has the advantage of these drawbacks and is characterized particularly in that the shells It is shown that the device for securing the bucket on the plunger rod and not on a portion that extends said piston and passing through the moving equipment, offers the advantage of simplifying the construction of the jack. Further, the hydraulic fluid is exerted on the entire front face of the piston, improved efficiency of the jack. According to another feature of the invention, the frame mentioned above is rotatably mounted over the piston rod, its axis of rotation coincident with the axis of the rod. The mode of assembly according to the invention therefore allows the orientation of the bucket about its axis, but prevents inadvertent rotation of the latter during the operations of loading and unloading. Always according to the invention, the moving element is provided with guide means cooperating with the frame. These guide means allow the moving equipment to better withstand the forces exerted on it by the shells. The invention also relates, as new industrial products, the handlers, lifting, and so on, provided with buckets of the type described above. In the accompanying drawings given solely by way of example: Figure 1 shows a plan view of the device according to the invention; Figure 2 is a side view, with partial wrenchings of the device of Figure 1; Figure 3 shows, on an enlarged scale, the means for blocking rotation of the frame with respect to the piston rod. By referring to Figures 1 and 2 it is shown that the device essentially comprises a frame 1 formed of two parallel upright posts The device also includes a ram 6 constituted by a running part 7 and a piston 8 whose fixed 996,785. Hydraulically operated grab-buckets. YUMBO. July 26, 1963 [Aug. 28, 1962], No. 29726/63. Heading B8H. The shells 4a, 4b, Fig. 1, of a grab-bucket are pivoted at 5a, 5b to the ends of frame members 2a, 2b, Fig. 2, and are opened and closed by a cylinder 7, which slides up and down on a fixed piston 8, and is connected to the shells by pivoted links 14a, 14b. The cylinder 7 carries guide rollers 15a, 15b which run on ribs 16a, 16b, alternatively shoes or sliders may replace the rollers. A cross-member 3 of the members 2a, 2b is adjustably clamped between friction discs to prevent rotation of the grab about a vertical axis when the hydraulic fluid is under pressure. 1° a grab of the type comprising two shells pivotally steered by a cylinder consisting of a stationary body forming piston and supporting said shells and by moving gear connected thereto, said bin being notable by the following features considered separately is in combination: а. The above-mentioned shells are hinged to a frame integral with the piston rod which slides in said fixed and said movable apparatus; б. The frame mentioned above is rotatably mounted over the rod of said piston, its axis of rotation coincident with the axis of said rod; c.. Locking means are provided for preventing rotation of said frame about the rod when the hydraulic circuit is under pressure; th. Means are provided for adjusting the pressure, in the absence of the pressure exerted by the fluid, between the frame and the friction members mentioned; /. In one embodiment, the friction members are preferably made by disks or the like disposed on either side of a crossmember is like the frame, fitted over said rod, one of said pads at least on cooperating with the adjusting means mentioned above; the j. In one embodiment the frame includes two substantially parallel uprights to nn made integral to each other at their bottoms εf upper, posts between which moves the moving equipment mentioned above; Z according to one embodiment, the aforementioned guide means consist of rollers, pads or the like moving along tracks provided on the vertically extending post. 2° has as new industrial products, the lifting handling machines, and so on, provided with buckets] described above. Company said: YUMBO Proxy: John MattpINDUSTRIAL PROPERTY
Grab.
