Pruner with power driven extension
OwnerEarl M. Huddleston, deceased, by Anne W. Huddleston, executrixinventors
Life of this patent
Estimating the term…
Abstract
An improved pruner having a housing assembly provided with telescoping sections, a telescoping drive shaft assembly contained within the housing, a cutting head at one of the drive shaft assembly, and a power source at the other end and further including, as an improvement, a power driven gear system including reduction gears and reversing gears, and a worm drive engaging a rack mounted upon the telescoping sections of the housing for extending or collapsing the housing and hence the pruner. A shift lever adjacent a pruner handle actuates the worm drive to extend or collapse the pruner to provide a pruner of desired length.
Claims4
An improved pruner of the type having a telescoping drive shaft housing assembly, a rotatable telescoping drive shaft assembly contained within the housing assembly, cutting means interconnected at one end of the drive shaft assembly, and a power source interconnected at the other end of the drive shaft assembly, wherein said improvement comprises:
- power driven extension means including a first bevel gear affixed to the drive shaft assembly adjacent the power source;
- a second bevel gear meshing with said first bevel gear;
- at least one reduction gear interconnected to said second bevel gear;
- a pair of reversing gears meshing with one another and one of said reversing gears meshing with said reduction gear;
- an elongated worm drive shaft interconnectible with a selected reversing gear;
- and a rack affixed to said drive shaft housing assembly and meshing with said worm drive shaft for reciprocal movement of at least a portion of said housing assembly;
- and
- control means including a shift lever operable to connect said worm drive shaft to a selected reversing gear for extending or shortening the pruner and said shift lever operable to disengage from said reversing gears for holding the pruner at a set position.
An improved pruner of the type having a telescoping drive shaft housing assembly, a rotatable telescoping drive shaft assembly contained within the housing assembly, cutting means interconnected at one end of the drive shaft assembly, and a power source interconnected at the other end of the drive shaft assembly, wherein said improvement comprises:
- power driven extension means interconnected between said power source and said housing assembly for telescopically extending or contracting the pruner, said extension means including a reduction gear assembly interconnected to said power source;
- a worm gear assembly interconnected with said reduction gear assembly, and a rack interconnected to said worm gear assembly and said drive shaft housing assembly for reciprocal movement therewith;
- and
- control means for selected activation of said extension means.
Dependencies are inferred from the claim text.