Hedge Trimmer Research Articles

In-line hedge trimmer with planetary gear drive and vibration damping blade assembly

A power driven reciprocating blade hedge trimmer includes a speed-reducing gear train with a sun gear, a plurality of planet gears, and a surrounding hollow drum-like orbiting gear element that seals in gear train lubricant and is formed to have an outer peripheral sinuous groove serving as a cam. A pin-engaging, guided, reciprocating cutting blade element of the hedge trimmer is driven by engagement of the pin and the groove shaped cam to produce reciprocating cutting motion aligned with the axis of the rotating power source. Resilient damping elements are affixed to an end of a blade supporting element where it is held by the hand-held portion of the device, to attenuate and isolate undesirable vibrational feedback generated during reciprocation of the cutting blade element.

Grass Seed Harvester for Small Plots1

A seed‐head harvester consisting of a gasoline‐powered hedge trimmer and an aluminum tray is described. This harvester greatly facilitates harvesting grass seed of small research plots and reduces labor requirements to one‐fifth that of hand harvesting.

An Electric Scythe for Small Plot Harvest of Safflower1

AbstractThe blade of a scythe was replaced with an electric hedge trimmer to cut small plots of safflower (Carthamus tinctorius L.). Compared to the other methods, cutting time was decreased 25 to 75% and work was done with less discomfort.