Material or article handling – Vertically swinging load support – Shovel or fork type
Reexamination Certificate
1999-07-28
2001-06-19
Underwood, Donald W. (Department: 3652)
Material or article handling
Vertically swinging load support
Shovel or fork type
C172S274000
Reexamination Certificate
active
06247888
ABSTRACT:
This invention concerns a loader having a loader boom to which a parking stand is attached, the stand including a support leg and strut respectively pivotally mounted to the boom for pivoting freely about first and second pivot axes between stored and park positions of the parking stand, with retaining means being present to releasably secure the stand in the stored position and the strut then being operative when the stand is moved to its park position to anchor the support leg.
BACKGROUND OF THE INVENTION
Loaders are mounted to agricultural or industrial vehicles such as, for example, agricultural tractors. They are frequently provided on the front side of the vehicle, but may also be attached to its rear side. When the loader is not needed, it can be removed from the vehicle and parked. For this purpose, known loaders, for example, a loader of Series Q of {acute over (Å)}lö (Prospectus No. 11 24 575), are provided with parking stands that are pivotally mounted to the loader boom for movement between raised stored positions and lowered park positions. When parked, the loader is in a lowered condition so as to be supported in part by a bucket coupled to one end of the loader boom and further by respective support legs of the parking stands. When the loader is installed on the tractor, the support legs are swiveled upward into their stored positions in which they are in contact with the loader boom and are secured in the usual manner by retaining pins, or the like, in order to avoid interfering with the operation of the loader. In order to park the loader, the retaining pins must be removed so as to permit the support legs to swivel down to their parking positions. Beyond that, each parking stand includes a strut that is also pivotally attached to the loader boom. The strut is provided with a support component which may be engaged with the edge of an opening located in the support leg after the support leg has been pivoted to its park position. In order to assure a durable positive lock between the edge of the support leg opening and the support component of the strut, the support component is secured in the opening in the usual manner, for example, by means of the aforementioned retaining pin. After the loader is installed on the tractor, the retaining means must be released, the strut and the support leg disconnected from each other, and both the strut and the supporting leg must be pivoted manually in the upward direction. The strut and unloading support must be separately guided manually so that the strut comes to lie between the support leg and the loader boom. While the known parking stand arrangements function properly, the structure for permitting the movement of the support leg and strut between stored and park positions is not quite as simple as desired which results in the arrangement being more costly than is necessary.
SUMMARY OF THE INVENTION
According to the present invention there is provided an improved parking stand arrangement for a tractor front end loader.
An object of the invention is to provide a front end loader parking stand arrangement which is of a simple, compact construction which may be easily moved between stored and parking positions.
A more specific object of the invention is to provide a front end loader parking stand arrangement including a pair of support legs, which are each pivotally mounted to a respective arm of the loader boom, and including a pair of supporting strut which respectively hold the support legs in a stored position against the underside of associated loader arm when the strut is in its stored position and releasably secured to the loader boom, the strut having a support component in the form of a receptacle which is brought into engagement with a cross pin carried by the support leg when the support leg and strut are lowered to establish the parking stand park position.
These and other objects will become apparent from a reading of the ensuing description together with the appended drawings.
REFERENCES:
patent: 4257730 (1981-03-01), Kawakita
patent: 4264264 (1981-04-01), McMillan et al.
patent: 4347031 (1982-08-01), Friesen et al.
patent: 4522554 (1985-06-01), Williams et al.
patent: 1990849 (1967-02-01), None
Advertising Brochure of Ab Alö-Maskiner, Sweden, dated 1993.
Advertising Brochure of Trima Ltd., 33 Tatton Court, Kingsland Grange, Warrington WA 1 4RR, pp. 1 (cover), 5 and 16 (back) dated 1991.
Advertising Brochure of Farmhand, 525 15thAvenue South, Hopkins, MN (not dated but prior art to the instant application), cover and rear page plus two interior pages.
Deere & Company
Underwood Donald W.
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