Abstract: The apparatus or “chiller” uses an upward stream of ambient air drawn through the upright housing to cool crumb rubber particles that are deposited into and fall through the housing. The chiller includes an upright chiller housing and an array of internal baffles disposed within the lower section of the housing. Crumb rubber deposited into the chiller housing falls through the upward air flow within the chiller housing and cascades around and through the baffle array before exiting the chiller. The baffle array inside the lower section of the chiller housing slows the fall of the crumb rubber, thereby increasing the dwell time through the chiller to provide enhanced cooling. The baffle array also creates a more turbulent air flow through which the crumb rubber falls. The rising turbulent air mass enhances the transfer of thermal energy from the falling crumb rubber.

Abstract: The apparatus and method produces fine mesh crumb rubber and provides for independently driving two parallel rolls, with one roll turning at tip speeds far above conventional cracker mills. Turning the roll at a rate (rpms) that results in “hyper” outer roll surface speeds between 1000 ft/min and 1300 ft/min., which is four and a half times the normal maximum speed of conventional mills yields several unexpected and beneficial results. The previously expected effects of operating at surface speeds about 400 ft/min are reduced or eliminated.

Abstract: The apparatus or “chiller” uses an upward stream of ambient air drawn through the upright housing to cool crumb rubber particles that are deposited into and fall through the housing. The chiller includes an upright chiller housing and an array of internal baffles disposed within the lower section of the housing. Crumb rubber deposited into the chiller housing falls through the upward air flow within the chiller housing and cascades around and through the baffle array before exiting the chiller. The baffle array inside the lower section of the chiller housing slows the fall of the crumb rubber, thereby increasing the dwell time through the chiller to provide enhanced cooling. The baffle array also creates a more turbulent air flow through which the crumb rubber falls. The rising turbulent air mass enhances the transfer of thermal energy from the falling crumb rubber.

Abstract: Methods and apparatus to make rubber crumb particles, are disclosed. An example method comprises rotating a pair of rigid rolls disposed closely adjacent one another via self-aligning bearings that support the rigid rolls with a preset gap therebetween, feeding material between the rigid rolls, and maintaining the preset gap to exceed the elastic limit of the material.

Abstract: A grapple provides a body and a tine. The tine has first and second ends and a plurality of arms located at the first end. The arms are separated by a pair of outer slots and at least one inner slot. The inner slot extends further into the tine relative to the pair of outer slots.

Abstract: A grapple provides a body and a tine. The tine has first and second ends and a plurality of arms located at the first end. The arms are separated by a pair of outer slots and at least one inner slot. The inner slot extends further into the tine relative to the pair of outer slots.