Material or article handling – Vertically swinging load support – Grab
Patent
1988-03-31
1989-02-21
Werner, Frank E.
Material or article handling
Vertically swinging load support
Grab
414686, 414718, 414727, 414728, B66C 142
Patent
active
048060674
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to an assembly capable of being attached to a loader and in particular to a loader which is originally equipped with attachment means intended for co-operation with a respective one end of two lifting arms whose other ends are intended to carry suitable load-handling devices, such as lifting forks, buckets etc., and where the lifting arms and load-handling devices are detached. In addition, the loader includes lifting ram attachments intended to co-operate with respective first ends of two lifting ram assemblies whose respective other ends coact with the lifting arms, and where the lifting rams are detached.
The invention is thus based on the concept of enabling a conventional loader retailed for service in one particular working area, e.g. as a sand loader, to be adapted with the aid of simple means for effective work in a completely different field, e.g. as a timber-bundle loader, by removing the bucket and associated lifting ram assemblies from the loader and substituting the same with an assembly which is adapted for loading work in the new field.
The invention also relates to one such assembly which is provided in the central region thereof with means for connecting the same to attachment means originally provided on the loader, and the other part of which presents a pivot attachment for pivotal co-action with a load-handling arrangement, normally an operating arm or jib arrangement.
BACKGROUND ART
There is known from Swedish Patent Application No. 7800001-5, published with serial number 409 694, a loader in the form of a two-part vehicle, whose forward part and associated wheels is journalled for rotation to the rear vehicle-part and its associated wheels. The rear vehicle part carries the machine motor etc., whereas the forward part of the vehicle carries the load-handling equipment of the machine, such as the loading or lifting assembly. According to the invention there is also connected to the forward part of the vehicle a main assembly which is mounted on a plurality of wheels which support against the ground or surface on which the vehicle stands and which are located forwardly of the axle of the front vehicle wheels, said main assembly carrying part of the load-handling equipment.
The main assembly illustrated here presumes that a unit provided with load-supporting wheels is connected to the axle-attachment of the forward part of the machine, or adjacent a part of said attachment, and to a further attachment means located over the axle-attachment placed on the forward part of the vehicle. The main assembly incorporates a hydraulic piston-cylinder device which is intended to power a lifting assembly and which extends between the axle-attachment of the assembly, or a part adjacent thereto, and a lifting arm forming part of the lifting assembly.
The pertinent prior art also includes the arrangement described and illustrated in Swedish Patent Application No. 14151/77, published with serial number 356 489. Described and illustrated in this publication is a loader which supports a lifting assembly which is controlled from a control seat located in the forward part of the tractor and which includes a raisable and lowerable lifting arm, the forward end of which carries a gripping assembly comprising gripping arms designed, for example, to grip and lift a bundle of elongated objects, such as logs. The lifting arms can be extended telescopically and are journalled for vertical movement on a journal shaft which extends substantially parallel with the control seat of the machine and above the same.
The arrangement illustrated and described in Canadian Patent Specification No. 1,010,827 also forms part of the pertinent prior art.
SUMMARY OF THE INVENTION
Technical Problem
With reference to the existing state of the prior art, particularly as expressed in the aforesaid publication 409 694, it is obvious that a serious technical problem is one of providing with the aid of simple means an assembly which can be attached to a loader with the aid of existing
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patent: 4210219 (1980-07-01), Oswald et al.
patent: 4353424 (1982-10-01), Schenck et al.
patent: 4382743 (1983-05-01), Newell
patent: 4405281 (1983-09-01), Ruttershoff
Underwood Donald W.
Werner Frank E.
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