Lever-action motorized earth drill
First Claim
Patent Images
1. A motorized earth drill, comprising:
- (a) a straight rigid lever pivotally mounted on an axle supported by a pair of wheels; and
(b) motorized digging means pivotally connected to a first end of the lever, the second end of the lever adapted for exertion of vertical forces thereupon, the distance from the locus of support of the lever by the axle to the first end of the lever defining a first lever arm, the distance from the locus of support by the axle to the second end of the lever defining a second lever arm, the ratio of the second lever arm to the first lever arm being at least about 1;
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Accused Products
Abstract
Apparatus for digging post holes with motorized power. The earth drill comprises a rigid lever pivotally mounted on an axle supported by a pair of wheels. Motorized digging means are pivotally connected to one end of the lever. The other end of the lever is adapted for exertion of upward and downward forces thereupon. The distance from the point of support of the lever by the axle to the first end of the lever defines a first lever arm. The distance from the point of support to the other end of the lever defines a second lever arm.
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Citations
32 Claims
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1. A motorized earth drill, comprising:
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(a) a straight rigid lever pivotally mounted on an axle supported by a pair of wheels; and (b) motorized digging means pivotally connected to a first end of the lever, the second end of the lever adapted for exertion of vertical forces thereupon, the distance from the locus of support of the lever by the axle to the first end of the lever defining a first lever arm, the distance from the locus of support by the axle to the second end of the lever defining a second lever arm, the ratio of the second lever arm to the first lever arm being at least about 1;
1. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A motorized earth drill, comprising:
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(a) a rigid lever pivotally mounted on an axle supported by a pair of wheels; and (b) motorized digging means pivotally connected to a first end of the lever, the second end of the lever being adapted for exertion of vertical forces thereupon, the distance from the locus of support of the lever by the axle to the first end of the lever defining a first lever arm, the distance from the locus of support by the axle to the second end of the lever defining a second lever arm, the lever comprising a substantially triangular rigid member pivotally mounted on the axle at a first vertex of the triangular member, the digging means being connected to the lever at a second vertex of the triangular member. - View Dependent Claims (19, 20, 21)
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22. A motorized earth drill, comprising:
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(a) a generally T-shaped member which acts as a lever, the T-shaped member including a first rigid elongated member connected at one end to a second elongated rigid member in a substantially perpendicular configuration, the first elongated member pivotally mounted near the other end of the first elongated member on an axle supported by a pair of wheels; (b) first bracing means, including third and fourth elongated rigid members, first ends of the third and fourth elongated members connected to the other end of the first elongated member, the second end of the third elongated member connected to a first end of the second elongated member, the fourth elongated member to the second end of the first elongated member, the junction of the first and fourth elongated members closer to the junction of the second and third elongated members than to the junction of the second and fourth elongated members, the fourth elongated member extending beyond its junction with the second elongated member to provide an extension for the attachment of a handle; (c) a handle fastened to the extension of the fourth elongated member, for applying a torque to the fourth elongated member and the T-shaped member; (d) second bracing means, including a generally U-shaped rigid member, each end of the U-shaped member pivotally mounted on the axle near each wheel; and
fastened to the first, third, and fourth elongated members at the junction of the first, third, and fourth elongated members;(e) fifth and sixth elongated rigid members substantially parallel to the second elongated member, the second elongated member disposed between and spaced apart from the fifth and sixth elongated members, first ends of the fifth and sixth elongated members disposed proximate the handle; (f) first, second, and third rigid, substantially horizontal transverse members fastened perpendicularly to the second, fifth, and sixth elongated members; (g) first and second rigid oblique members fastened to the fifth and sixth elongated rigid members near the second end of the fifth and sixth elongated members, to provide support means for pivotally mounting a motor-driven auger; and (h) means for pivotally connecting the motor-driven auger to the rigid oblique members. - View Dependent Claims (23)
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24. A motorized earth drill, comprising:
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(a) a generally T-shaped member which acts as a lever, the T-shaped member including a first rigid elongated member connected at one end to a second elongated rigid member in a substantially perpendicular configuration, the first elongated member pivotally mounted near the other end of the first elongated member on an axle supported by a pair of wheels; (b) first bracing means, including third and fourth elongated rigid members, first ends of the third and fourth elongated members connected to the other end of the first elongated member, the second end of the third elongated member connected to a first end of the second elongated member, the fourth elongated member to the second end of the first elongated member, the junction of the first and fourth elongated members closer to the junction of the second and third elongated members than to the junction of the second and fourth elongated members, the fourth elongated member extending beyond its junction with the second elongated member to provide an extension for the attachment of a handle; (c) a handle fastened to the extension of the fourth elongated member, for applying a torque to the fourth elongated member and the T-shaped member; (d) second bracing means, including a pair of trusses fastened to the axle and to a shaft-connector fastened to the first elongated member, the shaft-connector connecting a pair of shafts supported by the pair of wheels, the trusses obliquely connected to the shafts and to the shaft-connector; (e) fifth and sixth elongated rigid members substantially parallel to the second elongated member, the second elongated member disposed between and spaced apart from the fifth and sixth elongated members, first ends of the fifth and sixth elongated members disposed proximate the handle; (f) a first rigid, transverse, substantially horizontal member fastened perpendicularly to the second, fifth, and sixth elongated members near the first ends of the second, fifth, and sixth elongated members; (g) a second rigid, substantially horizontal transverse member fastened perpendicularly to the second, fifth, and sixth elongated members near the second ends of the second, fifth, and sixth elongated members; (h) a third rigid, substantially horizontal transverse member fastened perpendicularly to the second, fifth, and sixth elongated members near the midpoint of the second, fifth, and sixth elongated members; (i) a pair of rigid, substantially vertical members fastened perpendicularly to the ends of the first horizontal transverse member, to provide means for containing a load of fence posts above the second, fifth, and sixth elongated members and the first, second, and third horizontal transverse members; (j) first and second rigid oblique members fastened to the fifth and sixth elongated rigid members near the second ends of the fifth and sixth elongated members, to provide support means for pivotally mounting a motor-driven auger; and (k) means for pivotally connecting the motor-driven auger to the rigid oblique members. - View Dependent Claims (25)
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26. A frame for a motorized earth drill, comprising:
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(a) a first rigid triangular member comprising first, second, and third sides, and first, second, and third vertexes opposite the first, second, and third sides, respectively; (b) a second rigid triangular member comprising first, second, and third sides opposite first, second, and third vertexes, respectively; (c) a hinge connecting the first vertex of the second triangular member to the first side of the first triangular member; and (d) a pedal connected to the second vertex of the second triangular member.
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27. A motorized earth drill, comprising:
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(a) a first rigid triangular member comprising first, second, and third sides opposite first, second, and third vertexes, respectively; (b) a second rigid triangular member comprising first, second, and third sides opposite first, second, and third vertexes, respectively; (c) a hinge connecting the first vertex of the second triangular member to the first side of the first triangular member; (d) a pedal connected to the second vertex of the second triangular member, the first triangular member, the hinge, and the pedal comprising a frame for the motorized post-hole digger, a first end of the frame adapted for connection thereto of motorized digging means, the second end of the frame adapted for exertion thereon of vertical forces to impress a torque on the frame; (e) means for connecting motorized digging means to the first end of the frame; and (f) motorized digging means connected to the first end of the frame. - View Dependent Claims (28, 29, 30)
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31. A motorized earth drill, comprising:
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(a) a pair of wheels; (b) an end of a shaft disposed in each of the wheels, to serve as an axle; (c) a rigid transverse member mounted on the shaft and spanning the space between the wheels, the transverse member disposed above and pivotally fastened to the axle; (d) a rigid elongated member fastened to the transverse member at the approximate midpoint of the transverse member in a substantially perpendicular configuration, to serve as a lever, both ends of the elongated member extending beyond the junction of the elongated member with the transverse member; and (e) motorized digging means pivotally connected to one end of the elongated member. - View Dependent Claims (32)
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Specification