Manually operated adjustable earth moving tool
A manually operated device or tool for manipulating or working the earth or soil. A preferred embodiment possesses an elongated digging rod having an adjustable handle assembly configured to quickly locate and fasten to a plurality of predetermined set points located on the elongated digging rod. The apparatus compensates for the incremental deepening of a hole as the digging activity progresses so to enable a user to better maintain a preferred, upright, working posture. This is accomplished by adjusting the elongated digging rod, given a substantially constant handle assembly height, to consecutively lower settings corresponding to the increasing hole depth.
1. A manually operated adjustable earth moving tool, comprising:
an elongated substantially solid bar having a central longitudinal axis, a first end, a second end, and an intervening portion located between said first end and said second end, said intervening portion having a length and a bar cross-sectional geometry,
wherein said length of said intervening portion has a plurality of height adjustment bolt-holes linearly disposed along said length of said intervening portion of said elongated substantially solid bar wherein said plurality of bolt-holes have substantially identical dimensions and orientations with respect to said central longitudinal axis,
at least one of said first end or said second end having a configured tip that provides a means for affecting soil,
a handle assembly comprising a tubular receiver having an inner portion, an outer portion, and two coaxially aligned opposing handles, wherein said two coaxially aligned opposing handles each have an outer end and are both symmetrically disposed about said outer portion of said tubular receiver, and said inner portion has a receiver cross-sectional geometry substantially similar to said bar cross-sectional geometry such that a sliding engagement between said elongated substantially solid bar and said handle assembly is enabled,
wherein a portion of said bar cross-sectional geometry and said receiver cross-sectional geometry having a substantially similar non-circular cross-sectional geometry such that said elongated substantially solid bar and said handle assembly are substantially coupled to each other wherein rotational motion about said central longitudinal axis with respect to one another is inhibited while permitting said sliding engagement between said elongated substantially solid bar and said handle assembly,
a means for slidably affixing said handle assembly to any of said plurality of bolt-holes disposed along said length of said intervening portion, thereby providing a means for adjusting said handle assembly along said elongated substantially solid bar,
wherein said means for slidably affixing said handle assembly further comprises one of said opposing handles of said handle assembly, having an outer end, further comprises an integrated self-actuating locking pin feature having a locked and an unlocked position, said integrated locking pin self-closing feature comprising:
a handle end cap, removably attached to said outer end of at least one predetermined said opposing handles,
a bar locking pin having a bar locking pin first end and a bar locking pin second end,
a compression spring having a compression spring first end, a compression spring second end, a home position length, and a compressed length; and
a user disengagement member having an inner end, a user end, a home position and a disengaged position, and
said bar locking pin second end is connected to said user disengagement member said inner end, and said bar locking pin second end engages said first spring end of said compression spring, and said second end of said compression spring receives support from said handle end cap, thereby providing a means for generating a compression spring biasing force directed to said locking pin.
2. The manually operated adjustable earth moving tool of claim 1 , wherein said intervening portion of said elongated substantially solid bar is fabricated from a material selected from the group consisting of metals, plastics and composites.
3. The manually operated adjustable earth moving tool of claim 1 , wherein said plurality of bolt-holes have a constant predetermined distance between adjacent bolt-holes.
4. The manually operated adjustable earth moving tool of claim 2 , wherein said configured tip is metallic and removably attachable.
5. The manually operated adjustable earth moving tool of claim 1 , wherein said configured tip comprises a geometry selected from the group consisting of a point, a screw, and a chisel.
6. The manually operated adjustable earth moving tool of claim 1 , wherein said handle is disassemblable from said elongated substantially solid bar, thereby providing a means for separating said handle assembly from said elongated substantially solid bar.
7. The manually operated adjustable earth moving tool of claim 1 , wherein said integrated self-actuating locking pin feature further comprises a means for limiting travel of said locking pin such that consistent locking engagement with any of said plurality of bolt-holes disposed along said length of said elongated substantially solid bar is provided.
8. A handle assembly adapted to engage with an elongated substantially solid bar having a length, a cross-sectional geometry and a plurality of bolt-holes disposed along said length; said handle assembly, comprising:
a tubular receiver having an inner portion, an outer portion, and two coaxially aligned opposing handles, wherein said two coaxially aligned opposing handles each have an outer end and are both symmetrically disposed about said tubular receiver said outer portion, and said inner portion has a receiver cross-sectional geometry substantially similar to said bar cross-sectional geometry such that a sliding engagement between said elongated substantially solid bar and said handle assembly is enabled, and
a means for slidably affixing said handle assembly to said elongated substantially solid bar, such that said handle assembly cooperates with said plurality of bolt-holes disposed along said length of said elongated substantially solid bar, thereby providing a means for adjoining said handle assembly to any of corresponding said plurality of bolt-holes disposed along said length of said elongated substantially solid bar,
wherein said means for slidably affixing said handle assembly further comprises one of said two opposing handles of said handle assembly having an integrated self-actuating locking pin assembly having a locked and an unlocked position, said integrated self-actuating locking pin assembly comprising:
a handle end cap, removably attached to said outer end of at least one predetermined handle of said two opposing handles,
a locking pin having a locking pin first end and a locking pin second end,
a compression spring having a compression spring first end, a compression spring second end, a home position length, and a compressed length; and
a user disengagement member having an inner end, a user end, a home position and a disengaged position, wherein:
said locking pin second end is connected to said user disengagement member said inner end, said bar locking pin second end engages said first spring end portion of said compression spring, and said second end of said compression spring receives support from said handle end cap, thereby providing a means for generating a compression spring biasing force directed to said locking pin.
9. The handle assembly of claim 8 , wherein said integrated self-actuating bar locking pin feature further comprises a means for limiting travel of said locking pin such that a stable locking engagement between said locking pin and any of said plurality of bolt-holes disposed along said length of said elongated substantially solid bar is assured.