Machine for fitting and removing tires

Details Machine for fitting and removing tires Machine for fitting and removing tires

1999-10-27

2001-02-27

Scherbel, David A. (Department: 3723)

Wheelwright machines

Rubber tire mounting and/or demounting apparatus

For collapsing or shifting tire axially

Reexamination Certificate

active

06192959

ABSTRACT:

BACKGROUND OF THE INVENTION.
The prior art comprises Italian patent IT 1.246.168, which teaches a machine for fitting and removing tires which includes a self-centering platform, rotatable about a horizontal axis, and a tool-bearing tubular arm having an axis located, when in the work position, in a more or less perpendicular direction to an axis of rotation of the platform. At its base the arm is hinged and can slide axially along a parallel direction to the rotation axis of the platform. The arm bears, coaxially, at its upper part, a tool-bearing shaft on which two tools are arranged. The shaft is rotatable about its own longitudinal axis, enabling a single tool to be placed in the working position. The arm can act on both sides of the tire belonging to the wheel placed on the self-centering platform, thanks to the freedom to rotate the tools predisposed on the end of the tool-bearing arm by 180°. By performing this rotation the tools can be switched to operate on the opposite side of the tire. The tool-bearing arm is made so that when the arm is moved about the axis to which it is inferiorly hinged, the tool housed there is repositioned. The total operations needed for fitting and removing a tire using the above-described prior-art machine are relatively long and laborious.
SUMMARY OF THE INVENTION.
The main aim of the present invention is to provide a machine with which it is possible to perform tire removal and fitting extremely quickly and easily. An advantage of the invention is that it provides a machine that can perform its designated function for a relatively long time without need of repair, with no interruptions in the work cycle or other operational irregularities.
A further advantage is its simplicity of use.
A still further advantage is that a machine is provided which can be actuated by means of a single actuator and a single command.
A still further advantage is that the machine can, relatively effortlessly, make sure the beads of the tires are properly lodged and settled in the bead housings in the rim during the fitting stage.


REFERENCES:
patent: 2344704 (1944-03-01), Krantz
patent: 2798540 (1957-07-01), Branick
patent: 2837147 (1958-06-01), Henderson et al.
patent: 4047553 (1977-09-01), Kotila
patent: 4768572 (1988-09-01), Newburgh
patent: 5215138 (1993-06-01), Toriselli et al.
patent: 5222538 (1993-06-01), Tomita et al.
patent: 5226465 (1993-07-01), Schon et al.
patent: 5381843 (1995-01-01), Corghi
patent: 5758703 (1998-06-01), Mimura

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