The inventive wheelbarrow provides novel features that allow the wheelbarrow to remain level on uneven or sloping terrain when parked, thereby providing more stability.
대표청구항▼
The invention claimed is: 1. A self-leveling wheelbarrow comprising: a. a basin having a front end, a rear end, a left side and a right side; b. a wheel disposed beneath said basin near said front end; c. a rear mounting bracket secured near said rear end of said basin, said mounting bracket havin
The invention claimed is: 1. A self-leveling wheelbarrow comprising: a. a basin having a front end, a rear end, a left side and a right side; b. a wheel disposed beneath said basin near said front end; c. a rear mounting bracket secured near said rear end of said basin, said mounting bracket having a top end secured beneath said basin and a bottom end, said mounting bracket further having a vertical slot communicating therethrough; d. a leg assembly, said leg assembly comprising a pair of legs secured to one another by a centrally disposed plate, such that one of said pair of legs is positioned beneath said right side of said basin and the other one of said pair of legs is positioned beneath said left side of said basin, said plate further having a top edge; e. a pin extending from said plate, said pin slidably engaged within said slot to allow said leg assembly to move vertically within said slot and to rotate in a clockwise and counterclockwise direction about said pin; and f. a locking assembly secured beneath said basin in vertical alignment with said top edge of said leg assembly plate, said locking assembly configured to engage said top edge of said leg assembly plate when said leg assembly is in contact with a ground surface, said locking assembly comprising a first bar having an eccentrically fixed pivot end about which said bar may rotate, and a free end having a horizontal slot in alignment with said top edge of said leg assembly plate and configured to engage said top edge therein; whereby as said leg assembly contacts the underlying ground as the wheelbarrow is parked, said leg assembly rotates about said pin within said slot to accommodate the contour angle of the ground, sliding said top edge of said plate within said first bar slot in friction-fit contact therein, thereby locking said plate therein to prevent said leg assembly from rotating further about said pin, either in a clockwise direction of travel or a counterclockwise direction of travel. 2. The wheelbarrow of claim 1, wherein said top edge of said leg assembly plate has a smooth arcuate configuration. 3. The wheelbarrow of claim 1, wherein said locking assembly is secured to said top end of said mounting bracket. 4. The wheelbarrow of claim 1, wherein said locking assembly comprises a second bar aligned adjacent to said first bar, said second bar having an eccentrically fixed pivot end about which said second bar may rotate and a free end having a horizontal slot in alignment with said top edge of said leg assembly plate and configured to engage said top edge therein, wherein said second bar slot is in registration with said first bar slot, such that when said top edge of said leg assembly plate is engaged within said first and second slots simultaneously, said first and second bars, in combination, prevent said leg assembly from rotating in both clockwise and counterclockwise directions, regardless of said direction of travel. 5. The wheelbarrow of claim 1, further including: a. a front mounting bracket secured beneath said basin in registration with said rear mounting bracket; b. each of said legs of said leg assembly including a rear vertical member to which said plate is secured, a horizontal portion integral with said rear vertical member and adapted to contact said ground, and a front member integral with said horizontal member and terminating into a front plate, said front plate in alignment with said front mounting bracket; and c. wherein said pin is an elongated rod extending through said front mounting bracket, said front leg assembly plate, said rear leg assembly plate, and through said rear mounting bracket slot, said pin engaged within said front mounting bracket and secured to said front leg assembly plate and said rear leg assembly plate. 6. The wheelbarrow of claim 5, wherein said locking assembly comprises a second bar aligned adjacent to said first bar, said second bar having an eccentrically fixed pivot end about which said second bar may rotate and a free end having a horizontal slot in alignment with said top edge of said leg assembly plate and configured to engage said top edge therein, wherein said second bar slot is in registration with said first bar slot, such that when said top edge of said leg assembly plate is engaged within said first and second slots simultaneously, said first and second bars, in combination, prevent said leg assembly from rotating in both clockwise and counterclockwise directions, regardless of said direction of travel. 7. A self-leveling wheelbarrow comprising: a. a basin having a front end, a rear end, a left side and a right side; b. a wheel disposed beneath said basin near said front end; c. a rear mounting bracket secured near said rear end of said basin, said mounting bracket having a top end secured beneath said basin; d. a leg assembly, said leg assembly comprising a pair of legs secured to one another by a centrally disposed plate, such that one of said pair of legs is positioned beneath said right side of said basin and the other one of said pair of legs is positioned beneath said left side of said basin, said plate having a top edge, a bottom edge, and a vertical slot communicating therethrough; e. a pin extending from said mounting bracket, said pin slidably engaged within said slot to allow said leg assembly to move vertically within said slot and to rotate in a clockwise and counterclockwise direction about said pin; and f. a locking assembly secured beneath said basin in vertical alignment with said top edge of said leg assembly plate, said locking assembly configured to engage said top edge of said leg assembly plate when said leg assembly is in contact with a ground surface, said locking assembly comprising a first bar having an eccentrically fixed pivot end about which said bar may rotate, and a free end having a horizontal slot in alignment with said top edge of said leg assembly plate and configured to engage said top edge therein; whereby as said leg assembly contacts the underlying ground as the wheelbarrow is parked, said leg assembly rotates about said pin within said slot to accommodate the contour angle of the ground, sliding said top edge of said plate within said first bar slot in friction-fit contact therein, thereby locking said plate therein to prevent said leg assembly from rotating further about said pin, either in a clockwise direction of travel or a counterclockwise direction of travel. 8. The wheelbarrow of claim 7, wherein said top edge of said leg assembly plate has a smooth arcuate configuration. 9. The wheelbarrow of claim 7, wherein said locking assembly is secured to said top end of said mounting bracket. 10. The wheelbarrow of claim 7, wherein said locking assembly comprises a second bar aligned adjacent to said first bar, said second bar having an eccentrically fixed pivot end about which said second bar may rotate and a free end having a horizontal slot in alignment with said top edge of said leg assembly plate and configured to engage said top edge therein, wherein said second bar slot is in registration with said first bar slot, such that when said top edge of said leg assembly plate is engaged within said first and second slots simultaneously, said first and second bars, in combination, prevent said leg assembly from rotating in both clockwise and counterclockwise directions, regardless of said direction of travel. 11. The wheelbarrow of claim 10, wherein said top edge of said leg assembly plate has a smooth arcuate configuration. 12. The wheelbarrow of claim 10, wherein said locking assembly is secured to said top end of said mounting bracket. 13. The wheelbarrow of claim 7, further including a. a front mounting bracket secured beneath said basin in registration with said rear mounting bracket; b. each of said legs of said leg assembly including a rear vertical member to which said plate is secured, a horizontal portion integral with said rear vertical member and adapted to contact said ground, and a front member integral with said horizontal member and terminating into a front plate, said front plate in alignment with said front mounting bracket; and c. wherein said pin is an elongated rod extending from said front mounting bracket, said front leg assembly plate, through said slot in said rear leg assembly plate, and secured to said rear mounting bracket.
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