Wheelwright machines – Rubber tire mounting and/or demounting apparatus – For collapsing or shifting tire axially
Reexamination Certificate
1999-11-08
2001-08-21
Meislin, D. S. (Department: 3723)
Wheelwright machines
Rubber tire mounting and/or demounting apparatus
For collapsing or shifting tire axially
Reexamination Certificate
active
06276423
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates tire bead breakers. More particularly, the present invention relates to a portable tire bead breaker.
In order to de-mount a tire it must be separated from the tire rim at the seal, known as the bead, on the periphery of the tire and rim before the tire is forced away from the rim. Breaking the tire bead seal from the rim is a difficult task. The worker is handling a heavy and an unwieldy rim and an inflated tire which does not provide much flexibility.
Various devices have been conceived to de-bead tires. In most cases, the devices are stationary, massive, and expensive. However, there are certain circumstances which require the tire de-beading equipment to be portable. Although portable tire de-beading devices exist, these devices are bulky and inefficient. Instead of using such cumbersome portable devices, workers typically rely on tools that are inefficient and oftentimes damage or destroy tire. For example, a worker may utilize a thin and relatively long tool, such as a screw driver, and a hammer in an attempt to break the tire bead. Use of a hammer and a screw driver or the like can damage the tire, and is also hazardous to the worker.
Accordingly, there is a need for a lightweight and portable compact tool for breaking the seal of tires from rims. What is also needed is a portable tire bead breaking tool which is simple to operate. Such a tool should be capable of being used in small spaces while providing optimum leverage. The present invention fulfills these needs and provides other related advantages.
SUMMARY OF THE INVENTION
The present invention resides in a portable tire bead breaker which is durable yet lightweight and is simple to use. The tire bead breaker of the present invention is also foldable into a compact unit which is easily transported and stored.
The portable tire bead breaker generally comprises a base over which a tire and rim may be placed, a beam extending upwardly from the base, an arm assembly pivotally attached to the beam so as to extend over the base, and a driver pivotally attached to the arm and extending downwardly towards the base.
The base is pivotable with respect to the beam. A stop is formed in the base and configured to securely receive the beam to prevent the beam from pivoting during use. A ring extends upwardly from the base for stabilizing the tire and rim. The arm assembly includes an arm pivotally attached to the beam at a first pivot point and a cam pivotally connected to the beam at a second pivot point. The arm includes two opposed walls having a space therebetween, and arcuate slots formed in each wall generally opposite one another. The cam includes a pin slidingly disposed within the slots. The cam is configured to accept a removable handle. As the cam is pivoted, the pin slides over the arc of the slots causing the arm to pivot and driver to be increasingly extended downwardly towards the base.
The driver has a foot at a lower end thereof and configured to form a wedge. The driver includes an outer sleeve and an inner shaft slidable within the outer sleeve. Both the outer sleeve and inner shaft each have aligned pairs of apertures for adjusting the length of the driver.
In use, a tire and rim are placed on the base over the ring and the cam is pivoted causing the arm to pivot and the driver to be extended downwardly towards the tire and rim until the foot engages the tire and breaks a seal between the tire and the rim.
REFERENCES:
patent: 2505172 (1950-04-01), Coats
patent: 2602494 (1952-07-01), Larson
patent: 2672184 (1954-03-01), Bergeron
patent: 2973791 (1961-03-01), French
patent: 3008512 (1961-11-01), Foster
patent: 3493029 (1970-02-01), Kimball
patent: 4676291 (1987-06-01), Bolger
patent: 4969498 (1990-11-01), Sheets
patent: 5740848 (1998-04-01), Goracy
“Franklin Motorsports” Catalog, dated Mar. 1, 1999, p. 50.
“National Cart News” magazine, dated Aug. 1999, p. 66.
“Go Racing”0 magazine, dated Oct. 15, 1999, p. 50.
Kelly Bauersfeld Lowry & Kelley LLP
Meislin D. S.
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