# US 8,998,118 B2 · Truck mounted debris grinder > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,998,118 B2 - Document ID: US8998118B2 - Status: Granted - Kind: B2 - Application number: 13/751,192 - Filed: 2013-01-28 - Published: 2014-07-31 - Granted: 2015-04-07 - Earliest claimed: 2013-01-28 - Assignees: Gateway National Storage, LLC - Applicants: Gateway National Storage, LLC - Inventors: Paul J. Simon; Matthew C. Ruthig - Web page: https://patentgrep.com/patent/US8998118B2 ## CPC - B02C 21/02: Transportable disintegrating plant - B02C 19/0056: {specially adapted for specific materials not otherwise provided for} - B02C 19/16: Mills provided with vibrators ({roller mills B02C4/423}; tumbling mills B02C17/14) - B02C 23/18: Adding fluid, other than for crushing or disintegrating by fluid energy ({for tumbling mills B02C17/186;} feeding devices B02C23/02) - B02C: CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN ({household tools and machines for pulverising foodstuffs, e.g. coffee and spice mills A47J42/00; pharmaceutical mortars A61J3/02; mechanical processing of refuse and garbage B03B9/06; dressing mould materials by grinding B22C5/04}; obtaining metallic powder by crushing, grinding or milling B22F9/04; {recovery of plastics by disintegrating B29B17/00; crushing raw materials in starch making C08B30/02; beaters for papermaking D21D1/02; crushing devices specially for transport in mines E21F13/002; slag crushing devices F23J1/00; fuel milling devices in combustion apparatus F23K1/00; household devices for crushing coal F24B15/02; ice disintegrating devices F25C5/02}) ## Abstract A debris grinder interfaces directly with a typical roll-off container and a typical roll-off truck. By interfacing to the roll-off container, there is no need to feed waste by hand—an operation that is often dangerous to those operating the equipment. By interfacing with a typical roll-off truck, the debris grinder becomes mobile for spreading of the ground debris into the soil around the construction site. The debris grinder includes a skid portion for supporting and holding the roll-off container, a grinder portion for grinding debris from the roll-off container and depositing the ground-up debris onto the soil at the job site. ## Claims ### Claim 1 An apparatus for grinding debris, the apparatus comprising: a skid portion, the skid portion being of a size and shape to hold a roll-off container; a grinder portion, the grinder portion affixed to a first end of the skid portion, the grinder portion having means for grinding debris; and both the skid portion and the grinder portion of a size and shape conducive to being transported on a bed of a roll-off truck; wherein the skid portion is substantially planar, having rails to guide the roll-off container. ### Claim 2 (depends on 1) The apparatus for grinding debris of claim 1, wherein the means for grinding includes at least two grinding drums, the grinding drums rotated by at least one hydraulic motor. ### Claim 3 (depends on 2) The apparatus for grinding debris of claim 2, wherein the at least one hydraulic motor is interfaced to a source of hydraulic power, the source of hydraulic power being the roll-off truck. ### Claim 4 (depends on 1) The apparatus for grinding debris of claim 1, further comprising a shroud, the shroud at least partially covering an outflow side of the means for grinding, thereby directing particulate debris downward towards earth. ### Claim 5 (depends on 1) The apparatus for grinding debris of claim 1, further comprising a water system comprising at least one nozzle and a source of water, the at least one nozzle directed towards the means for grinding, thereby reducing dust output while the debris is being ground. ### Claim 6 (depends on 5) The apparatus for grinding debris of claim 5, wherein the source of water is a water tank integrated in the skid portion. ### Claim 7 (depends on 1) The apparatus for grinding debris of claim 1, further comprising means for vibrating the roll-off container, the means for vibrating assisting in moving the debris towards the means for grinding during operation. ### Claim 8 (depends on 1) The apparatus for grinding debris of claim 1, further comprising at least one fastening device, a first end of the fastening device affixed to the skid portion and a second end of the fastening device removably attaches to the roll-off container, thereby holding the roll-off container in position on the skid portion. ### Claim 9 An apparatus for grinding debris, the apparatus comprising: a skid portion, the skid portion being of a size and shape to hold a roll-off container, the skid portion has substantially planar top surface that interfaces with a bottom surface of the roll-off container, a first end of the skid portion has at least one foot on a bottom surface to separate the bottom surface of the skid portion from a surface on which the skid portion rests, the first end of the skid portion has at least one cable hook-up interface for interfacing to a winch of a roll-off truck; a grinder portion, the grinder portion affixed to a first end of the skid portion, the grinder portion having at least two grinding drums, the grinding drums rotated by at least one hydraulic motor for grinding debris; and both the skid portion and the grinder portion of a size and shape conducive to being transported on a bed of a roll-off truck. ### Claim 10 (depends on 9) The apparatus for grinding debris of claim 9, wherein the at least one hydraulic motor is interfaced to a source of hydraulic power, the source of hydraulic power being from the roll-off truck. ### Claim 11 (depends on 9) The apparatus for grinding debris of claim 9, wherein the skid portion is substantially planar, having rails to guide the roll-off container. ### Claim 12 (depends on 9) The apparatus for grinding debris of claim 9, further comprising a shroud, the shroud at least partially covering an outflow side of the means for grinding, thereby directing particulate debris downward towards earth. ### Claim 13 (depends on 9) The apparatus for grinding debris of claim 9, further comprising a water system comprising at least one nozzle and a source of water, the at least one nozzle directed towards the means for grinding, thereby reducing dust output while the debris is being ground. ### Claim 14 (depends on 9) The apparatus for grinding debris of claim 9, further comprising a vibration generating mechanism, the vibration generating mechanism assists in moving the debris towards the at least two grinding drums during operation. ### Claim 15 A method of grinding debris at a job site, the method comprising the steps of: lifting a roll-off container onto a bed of a roll-off truck, the roll-off container having debris disposed therein and a door at one end of the roll-off container is closed and latched; lowering the roll-off container and debris onto a first end of a skid portion of a roll-off container debris grinder allowing sufficient clearance between door and a debris grinding mechanism to open the door, the debris grinding mechanism located at a distal end of the skid portion; opening the door; pushing the roll-off container further onto the skid portion until the first end of the roll-off container abuts the debris grinding mechanism; pulling the roll-off container debris grinder up and onto the bed of the roll-off truck until the debris grinding mechanism is off of a surface at the job site; connecting the debris grinding mechanism to a source of power; and starting the debris grinding mechanism, thereby the debris passing through the debris grinding mechanism is processed into a form suitable for deposit into the surface of the job site. ### Claim 16 (depends on 15) The method of claim 15, further comprising a step of operating the roll-off truck to move around the job site, thereby distributing the debris as it is processed across the job site. ### Claim 17 (depends on 15) The method of claim 15, wherein the step of connecting the debris grinding mechanism to the source of power is connecting two hydraulic lines from the debris grinding mechanism to a hydraulic supply/return of the roll-off truck. ### Claim 18 (depends on 15) The method of claim 15, further comprising a step of spraying water over the debris as it is processed, thereby reducing dust. ### Claim 19 (depends on 15) The method of claim 15, wherein the step of pulling the roll-off container debris grinder and roll-up container up and onto the bed of the roll-off truck until the debris grinding mechanism is off of the surface at the job site includes leaving the roll-off container debris grinder and roll-up container tilted at an angle such that the debris is urged towards the debris grinding mechanism.