Asphalt shingle remover and deroofer apparatus

{
  "publication_number": "US4269450A",
  "country": "US",
  "kind": "A",
  "title": "Asphalt shingle remover and deroofer apparatus",
  "abstract": "Apparatus for removing old, deteriorated and worn out asphalt shingles, roofing paper, tar paper and roofing tacks from roof decking prior to replacing and installing new shingles, said apparatus having an electric motor-powered, self-propelled frame 12 with motor 62 driving the frame forward and with front mounted rotary cutter heads 20 disposed from a reversely turning, rotatably driven shaft 40 for removing the shingles, and a reversing motor 16 driving the rotatably driven shaft 40 and reversing drive wheels 54. The reversing motor 16 provides drive for a flapper head 18, cutter heads 20, and shaft 40.",
  "claims": [
    "1. An improved asphalt shingle remover and deroofer apparatus comprising a horizontally disposed U-shaped main frame drive means mounted on opposite sides of the frame and being driven by said drive menas mechanically coupled thereto, an arrangement of a plurality of cutter heads mounted affixedly onto a rotating shaft driven by said drive means, a driven flapper reel means rotatably mounted parallel to the rotating shaft for knocking out of the way the shingles that collect and become attached to the flapper reel means, and side cutter means being additionally end mounted on the rotating shaft with the rotatably mounted cutter heads.",
    "2. The invention according to claim 1 wherein handle bar means is provided to carry thereon a control unit panel means and toggle means for selectively operating switch means to drive and selectively control the drive wheel means.",
    "3. The invention according to claim 2 wherein flexible power cords connect at the handle bar for the control unit panel and the frame.",
    "4. The invention according to claim 1 wherein the cutter heads are positionally disposed about a cylindrical surface they generate and in such a manner that no more than one cutter head comes into contact with a roof decking at any one time.",
    "5. The invention according to claim 1 wherein the forward and reverse drive wheel means includes a forward wheel continuously driven and a reverse wheel continuously drive, the apparatus being driven forward by lifting up on the handle bar for disengage of the reverse wheel and conversely."
  ],
  "description_excerpt": "No prior anticipatory references are known regarding this invention as defined in the claims, but certain prior art references of cursory interest are:\n\nThese patents were found in U.S. Pat. Class 52, subclass 518 and Class 144, subclasses 13 and 164, inter alia. No prior art is found that suggests a construction comprising a sprocket wheel assembly for drawing a shingle remover machine across a deck or roof structure for cutting or driving a cutter head arrangement and which provides the ease of shingle removal in the manner set forth in this specification below.\n\nThe present invention relates to an automatic asphalt shingle deroofer which is used for removing old worn out shingles, roofing paper and roofing tacks from roof tops of any pitch, leaving the roof decking clean and ready to install appropriate felt materials and nail on new roofing. More particularly this invention relates to deroofer apparatus self-powered and self-propelled by an electric motor, and being controlled by an operator from walking behind the machine. The deroofer self-propells itself down the pitch of the roof, being guided by the operator, removing the shingles as it goes. As the machine approaches the edge or eave of the roof the machine is tilted by the operator to reverse the motion of the machine and it is returned to the center of the roof top. This is repeated progressively across the roof until all shingles are removed from the roof.",
  "cpc": [
    "E04D 15/003"
  ],
  "ipc": [
    "E04D 15/00"
  ],
  "inventors": [
    "Woodrow W. Welborn"
  ],
  "filing_date": "1979-05-30",
  "publication_date": "1981-05-26",
  "grant_date": "1981-05-26",
  "priority_date": "1979-05-30",
  "application_number": "US-4366879-A",
  "family_id": "21928283",
  "cited_by_count": 22,
  "citations": [
    "US755157A",
    "US1949482A",
    "US2455148A",
    "US2464980A",
    "US2714934A",
    "US2749103A",
    "US4009908A"
  ]
}