Portable tire bead breaker apparatus

{
  "publication_number": "US5191934A",
  "country": "US",
  "kind": "A",
  "title": "Portable tire bead breaker apparatus",
  "abstract": "A portable apparatus is provided for dislodging a tire bead from the bead seat of a wheel rim of a vehicle. The apparatus includes a pair of telescoping tubes (12, 14) which carry wheel rim engaging clamps (16, 18) at opposing outer ends of the tubes. The telescoping tubes are fixedly adjustable which allows the clamps to engage diametrically opposite portions of the wheel rim and to be tightened in place. A bead breaker foot (26) is carried at the outer end of tube (12) adjacent to engaging clamp (16). The breaker foot is movable and can be adjusted downwardly to break the tire away from the wheel rim.",
  "claims": [
    "1. A tire bead breaker apparatus, comprising: (a) a first tube having an outer end; (b) a second tube telescopically engaged with said first tube, said second tube having an opposing end to said first tube outer end; (c) a first clamp attached to said first tube at said outer end thereof; (d) a second clamp attached to said second tube at said opposing end thereof; (e) an upstanding power screw cooperatively disposed on said first tube outer end, said screw threaded vertically through a nut attached to a face plate disposed on said first tube outer end; and (f) a breaker foot operatively attached to said screw at a lower end thereof adjacent to said first clamp; wherein said breaker foot is displaceable in a perpendicular direction to said first and second tubes by movement of said power screw for pushing down upon a bead of a tire mounted on a wheel rim.",
    "2. The apparatus of claim 1 wherein said first clamp comprises a pair of spaced apart clamp members.",
    "3. The apparatus of claim 2 wherein said breaker foot can extend between said pair of clamp members.",
    "4. The apparatus of claim 3 wherein said breaker foot is displaceable by rotation of said upstanding power screw for pushing down upon a tire bead in an axial direction relative to a wheel rim axis while said first and second clamps engage and outer surface of the wheel rim.",
    "5. The apparatus of claim 4 further comprising a means for removably engaging said first and second clamps with said wheel rim.",
    "6. The apparatus of claim 5 wherein said engaging means comprises a threaded nut carried by said first tube, and a rotatable threaded rod disposed within said second tube which is operatively engaged with said threaded nut.",
    "7. The apparatus of claim 1 wherein said apparatus is made of steel.",
    "8. The apparatus of claim 1 further comprising a third clamp attached to said second tube at an opposite end and side from said second clamp.",
    "9. The apparatus of claim 8 wherein said clamps are rigidly attached to said first and second tubes.",
    "10. The apparatus of claim 1 wherein said breaker foot will clear the rib of a safety wheel when said foot is pushed against a tire bead.",
    "11. A method of removing a tire from a vehicular wheel rim using the tire bead breaker apparatus of claim 1, comprising the steps of: (a) engaging said first and second clamps with the wheel rim at diametrically opposite positioned on the rim; (b) contacting said breaker foot with the tire bead; and (c) pushing said breaker foot downwardly against the tire bead to break the tire away from the rim.",
    "12. A tire bead breaker apparatus, comprising: (a) a first tube having an outer end; (b) a first threaded nut disposed on said first tube; (c) a second tube telescopically engaged with said first tube, said second tube having an opposing end to said first tube outer end; (d) a rotatable threaded rod disposed within said second tube which is operatively engaged with said first threaded nut; (e) a first clamp rigidly attached to said first tube at said outer end thereof; (f) a second clamp rigidly attached to said second tube at said opposing end thereof; (g) a face plate disposed on said first tube outer end; (h) a second threaded nut attached to said face plate; (i) an upstanding power screw threaded vertically through said second threaded nut; and (j) a breaker foot operatively attached to said screw at a lower end thereof adjacent to said first clamp; wherein said breaker foot is displaceable in a perpendicular direction to said first and second tubes by movement of said upstanding power screw for pushing down upon a tire bead in an axial direction relative to a wheel rim axis while said first and second clamps engage an outer surface of the wheel rim.",
    "13. The apparatus of claim 12 wherein said first clamp comprises a pair of spaced apart clamp members.",
    "14. The apparatus of claim 13 wherein said breaker foot can extend between said pair of clamp members.",
    "15. The apparatus of claim 12 wherein said apparatus is made of steel.",
    "16. The apparatus of claim 12 further comprising a third clamp rigidly attached to said second tube at an opposite end and side from said second clamp.",
    "17. The apparatus of claim 12 wherein said breaker foot will clear the rib of a safety wheel when said foot is pushed against a tire bead.",
    "18. A tire bead breaker apparatus, comprising: (a) a first tube having an outer end; (b) a second tube telescopically engaged with said first tube, said second tube having an opposing end to said first tube outer end; (c) a first clamp attached to said first tube at said outer end thereof; (d) a second clamp attached to said second tube at said opposing end thereof; (e) a third clamp attached to said second tube at an opposite end and side from said second clamp; and (f) a breaker foot operatively disposed on said first tube outer end adjacent to said first clamp; wherein said breaker foot is displaceable in a perpendicular direction to said first and said second tubes for pushing down upon a bead of a tire mounted on a wheel rim.",
    "19. The apparatus of claim 18 wherein said clamps are rigidly attached to said first and second tubes.",
    "20. A tire bead breaker apparatus comprising: (a) a first tube having an outer end; (b) a threaded nut disposed on said first tube; (c) a second tube telescopically engaged with said first tube, said second tube having an opposing end to said first tube outer end; (d) a rotatable threaded rod disposed within said second tube which is operatively engaged with said threaded nut; (e) a first clamp rigidly attached to said first tube at said outer end thereof; (f) a second clamp rigidly attached to said second tube at said opposing end thereof; and (g) a third clamp rigidly attached to said second tube at an opposite end and side from said second clamp; (h) an upstanding power screw disposed on said first tube outer end; and (i) a breaker foot operatively attached to said screw at a lower end thereof adjacent to said first clamp; wherein said breaker foot is displaceable in a perpendicular direction of said first and second tubes by movement of said power screw for pushing down upon a tire bead in an axial direction relative to a wheel rim axis while said first and second clamps engage an outer surface of the wheel rim."
  ],
  "description_excerpt": "The invention relates to tire removing devices, and more particularly to an improved portable tire bead dislodging apparatus which breaks a tire away from a vehicular wheel rim.\n\nIn order to remove a tire from the wheel of a vehicle, it is necessary to dislodge or \"break\" the bead of the tire away from the bead seat of a wheel rim. A variety of devices for removing vehicular tires from wheel rims have been developed previously.\n\nFor example, Umemoto et al., U.S. Pat. No. 4,800,943 discloses a tire bead dislodging device which has slidable rim clamps and a screw rod to make adjustments to the diameter. A screw actuated breaker foot is moved downward by a handle and the breaker foot pushes down on the tire bead to remove the tire from the rim. Kohn, U.S. Pat. No. 2,619,158 discloses a tire bead tool which has a pair of wheel rim engaging clamps with one of the clamps slidable along a bar, and a breaker foot which is lever actuated.\n\nOther examples of tire bead breaker devices include Snider, U.S. Pat. No. 1,475,519, which discloses a bead breaker with a single rim clamp and a screw actuated breaker foot. Gering, U.S. Pat. No. 4,524,813 discloses a tire bead breaking tool which includes a holddown bar that is clamped to the wheel rim. The holddown bar includes a tire press having a tongue which is inserted between the tire bead and the wheel rim, and the tire press is screw actuated by use of a rotatable crank arm.",
  "cpc": [
    "B60C 25/025"
  ],
  "ipc": [
    "B60C 25/02"
  ],
  "inventors": [
    "Dale L. Wicklund"
  ],
  "filing_date": "1992-05-27",
  "publication_date": "1993-03-09",
  "grant_date": "1993-03-09",
  "priority_date": "1992-05-27",
  "application_number": "US-88948392-A",
  "family_id": "25395199",
  "cited_by_count": 18,
  "citations": [
    "US1475519A",
    "US2619158A",
    "US2873795A",
    "US4524813A",
    "US4800943A"
  ]
}