Fluent material handling – with receiver or receiver coacting mea – With signal – indicator – recorder – inspection means or exhibitor – Level or pressure in receiver
Patent
1980-07-14
1982-05-25
Bell, Jr., Houston S.
Fluent material handling, with receiver or receiver coacting mea
With signal, indicator, recorder, inspection means or exhibitor
Level or pressure in receiver
141285, 141326, 331267R, 74606R, 184 15, 184105R, 220 86R, B65B 304
Patent
active
043311857
DESCRIPTION:
BRIEF SUMMARY
DESCRIPTION
1. Technical Field
This invention relates generally to an assembly for filling a closed interior chamber and more particularly to an assembly for filling a transmission with a liquid lubricant.
2. Background Art
On earthworking equipment and other vehicles there are often several chambers which must be periodically filled with fluid to a desired level. For example, one chamber may hold engine lubricating oil, another may hold transmission fluid, still another may hold brake fluid, etc. To determine when a particular chamber must have fluid added, it is customary and convenient to utilize a dip stick.
Since there are several chambers which may need filling, there must be a corresponding number of dip sticks. This creates a problem for service personnel of determining which dip stick corresponds to each chamber. Normally, the dip sticks and fluid addition ports are correspondingly labelled. However, such labelling can become obscured due to dirt and/or wear. Hence, labelling alone is not an adequate solution to the problem.
While it is well known to vent chambers such as gasoline tanks and water tanks when they are being filled, an adequate assembly has not been available for accomplishing this with a closed pressure system such as a transmission, particularly through utilizing the filler assembly for this purpose upon disengaging its cap. Yet, it is particularly important to assure that an adequate air vent is present in such a system to normalize transmission pressure since hydraulic lock could occur, particularly when oil viscosity is relatively high as during cold weather, if proper venting has not taken place.
The present invention is directed to overcoming one or more of the problems as set forth above.
DISCLOSURE OF THE INVENTION
In one aspect of the present invention an assembly is provided for adding oil to a closed interior chamber defined by a case. A filler tube structure having input and exit portions has the exit portion thereof in communication with a top portion of the chamber. A dip stick guide tube structure has an interior passage in which a dip stick normally fits. The upper end portion of the guide tube structure is positioned adjacent and generally parallel to the input portion of the filler tube structure. A tubular fitting is provided which has first and second end portions with the first end portion being circumferentially sealed to the upper portion of the guide tube structure and to the input portion of the filler tube structure. The cap is removably attachable in covering relation with the second end portion of the tubular fitting.
When an assembly as set out above is utilized, it is virtually impossible for even an untrained person to utilize the wrong dip stick to determine the lubricant level within a particular system such as a transmission. Also, when the preferred embodiment of the invention is utilized, the occurrence of hydraulic lock when filling the interior chamber is reduced.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 illustrates, in side partial view, partially in section, an embodiment of the present invention;
FIG. 2 illustrates a partial view taken along the line II--II of FIG. 1;
FIG. 3 illustrates a view taken along the line III--III of FIG. 2, somewhat enlarged; and
FIG. 4 illustrates, in enlarged view, a portion of an alternate embodiment of the present invention.
BEST MODE FOR CARRYING OUT THE INVENTION
Embodiment of FIGS. 1-3
FIG. 1 shows an assembly 10 for adding a liquid to a closed interior chamber 12 defined by a case 14. The chamber 12 has a top portion 16 and a bottom portion 18. The case 14 would be the case for a transmission (not illustrated), in accordance with the preferred embodiment of the invention. However, it should be realized that the invention is not limited to an assembly 10 for filling only a transmission.
A filler tube structure 20 has an input portion 22 and an exit portion 24. The exit portion 24 is in communication with the top portion 16 of the chamber 12. The input portion 22 is generally above the exit portio
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patent: 3942564 (1976-03-01), Chigasaki
patent: 4067113 (1978-01-01), Haines et al.
patent: 4266344 (1981-05-01), Richardson
patent: 4276694 (1981-07-01), Richardson
Rinaldo James D.
Vize Robert M.
Bell, Jr. Houston S.
Caterpillar Tractor Co.
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