Apparatus for making tires filled with flatproofing material
AssigneePC Industries
InventorCharles A. Shaffer
Life of this patent
Estimating the term…
Abstract
A tire, and an apparatus and method for forming a tire. The tire may either be a tubed or tubeless tire, and is filled with a mixture of virgin rubber and small rubber pieces. Preferably, a machine grinds the core of used flatproofed tires, or pieces thereof, into a finely communicated pulverulent. The pulverent is mixed with liquid virgin flatproofing material, such as a polyurethane. An injector introduces this mixture, into the core of a tire, typically through a valve. The core of the tire is preferably substantially filled with this mixture. The injector may take the form of one or more elongated screws and the mixing may occur as the ground rubber is being conveyed by the screw.
Claims20
A system for making a tire with a substantially filled core comprising:
- a grinding device capable of grinding cured polyurethane;
- a mixer capable of mixing ground polyurethane and a liquid virgin polyurethane;
- and
- a pump configured to transfer the material mixed in the mixing device into the core of a tire.
A system for making a substantially filled tire comprising:
- a grinder;
- a mixer that combines the unused flatproofing material to the ground used flatproof pneumatic tires;
- an injector that injects a mixture of at least one unused flatproofing material into the ground used flatproof pneumatic tires
- a pump for transferring the combination of ground used flatproof pneumatic tires and unused flatproofing material from the mixer to a valve;
- an input device that inputs the combination into a tubed or tubeless pneumatic tire;
- and
- a pressure sensor attached to said input device.
A system for making a tire with a substantially filled core comprising:
- an elongated rotatable screw device capable of mixing the ground polyurethane and a liquid virgin polyurethane and pressurizing and transferring the mixed material into the core of a tire, said screw device having an input disposed to receive ground pured polyurethane from the grinding device.
Dependencies are inferred from the claim text.