US 7,461,881 B2 · Consumer post hole digger

Abstract

This invention provides a post hole digger having a first, traverse pivot point, located on the lower section of two handle members, and a second, blade assembly pivot point located at the medial point of the blade assemblies. Because the first pivot point is a traverse pivot point, the handle members are only required to travel through a limited range of motion. Additionally, the second, blade assembly pivot point is preferably an offset pivot point. Thus, because the second, blade assembly pivot point is disposed at a medial point of the blade assemblies, the motion of the handle members, which are coupled to the upper ends of the blade assemblies, is reversed relative to the lower ends of the blade members.

A post hole digger comprising:

a first handle assembly having an elongated handle member, said first handle assembly handle member having an upper portion with a longitudinal axis and a lower section with a longitudinal axis;
a second handle assembly having an elongated handle member, said second handle assembly handle member having an upper portion with a longitudinal axis and a lower section with a longitudinal axis;
said first handle assembly pivotally coupled to said second handle assembly at a first, traverse pivot point, said first, traverse pivot point disposed on said first handle assembly handle member lower section and said second handle assembly handle member lower section;
a blade assembly having a first blade sub-assembly and a second blade sub-assembly;
said first blade sub-assembly pivotally coupled to said first handle assembly, said first blade sub-assembly having an elongated blade portion having an upper end and a lower end;
said second blade sub-assembly pivotally coupled to said second handle assembly, said second blade sub-assembly having an elongated blade portion having an upper end and a lower end;
said first blade sub-assembly and said second blade sub-assembly coupled together at a blade assembly pivot point, said blade assembly pivot point disposed on said first blade sub-assembly blade portion upper end and said second blade sub-assembly blade portion upper end;
and
a central longitudinal axis extending through said traverse, first pivot point and said blade assembly pivot point;
said first handle assembly and said second handle assembly are structured to pivot relative to each other between a first position, wherein said first handle assembly upper end and said second handle assembly upper end adjacent to each other and a second position wherein said first handle assembly upper end and said second handle assembly upper end are generally spaced from each other;
said first blade sub-assembly and said second blade sub-assembly being structured to pivot relative to each other between a first, open position and a second, closed position, and wherein when said first handle assembly and said second handle assembly are in said first position, said first blade sub-assembly and said second blade sub-assembly are in said first, open position, and, when said first handle assembly and said second handle assembly are in said second position, said first blade sub-assembly and said second blade sub-assembly are in said second, closed position;
wherein said first handle assembly and said second handle assembly travel between about 4.0 degrees and 9.0 degrees relative to said central longitudinal axis when moved between said first position and said second position;
said first blade sub-assembly blade portion is elongated and has a longitudinal axis;
said second blade sub-assembly blade portion is elongated and has a longitudinal axis;
said first blade sub-assembly includes an elongated blade base having a longitudinal axis, said first blade sub-assembly blade base longitudinal axis being angled relative to said first blade sub-assembly blade portion longitudinal axis;
said second blade sub-assembly includes an elongated blade base having a longitudinal axis, said second blade sub-assembly blade base longitudinal axis being angled relative to said second blade sub-assembly blade portion longitudinal axis;
said first handle assembly handle member upper portion longitudinal axis being angled between about 5 degrees to 14 degrees relative to said first handle assembly handle member lower section longitudinal axis;
and
said second handle assembly handle member upper portion longitudinal axis being angled between about 5 degrees to 14 degrees relative to said second handle assembly handle member lower section longitudinal axis.

16 more elements

Consumer post hole digger

Life of this patent

Consumer post hole digger

Life of this patent

Abstract

Claims10