Electric garden tiller
View Patent ↗An electric garden tiller is disclosed. The tiller is light weight, compact and easy to use. The tiller includes a two stage speed reduction transmission and an aluminum transmission housing. Connected to the transmission housing are a main housing and electric motor, a fender, a tine shaft and four tine assemblies, a rotatable wheel assembly and a foldable handle. Connected to the handle is a safety switch mechanism requiring two simultaneous actions to activate the motor. Once activated, if an operator's hand is removed, the motor will stop.
1. An electric garden tiller comprising:
a main housing;
an electric motor mounted within said housing;
a transmission connected to said electric motor;
a tine shaft connected to said transmission;
a tine mounted to said tine shaft;
a handle extending away from said electric motor;
a sound insulative sleeve mounted around said electric motor;
said main housing including a first portion having a first air opening;
and a second portion having a second air opening;
said insulative sleeve having an upper opening and a lower opening whereby ambient air is directed to said electric motor and exhausted;
said transmission includes a two stage speed reduction arrangement through a small drive gear engaged to a large driven gear, said driven gear engaged to a worm shaft, said worm shaft engaged to a worm and said worm engaged to a driven worm wheel;
said transmission including a sealed transmission housing formed of two mating aluminum parts; and,
said transmission housing encloses said worm and said driven worm wheel;
said main housing includes a wall for directing ambient air to the electric motor and isolating ambient air directed to the electric motor from air being exhausted from the electric motor.
2. An apparatus as claimed in claim 1 including:
said second air opening in said lower front portion of said main housing.
3. An apparatus as claimed in claim 1 wherein
said handle is mounted to said transmission housing.
4. An apparatus as claimed in claim 1 further comprising an operating safety means including a biased pivotal lever connected to said handle, a biased blocking slide connected to said handle and an electrical switch connected to said handle and being engageable by said pivotal lever.
5. An apparatus as claimed in claim 1 wherein:
said handle is movable between a folded storage position and an extended use position; and including a set of wheels movable between a folded storage position and an extended use position.
6. An electric garden tiller comprising:
a sound insulative sleeve surrounding an electric motor mounted within a housing and a transmission connected to said electric motor;
a tine shaft having at least one tine mounted thereon and connected to said transmission;
a handle extending away from said electric motor;
said housing including a first portion having a first air opening and a second portion having a second air opening;
said insulative sleeve having an upper opening and a lower opening allowing ambient air to be directed to said electric motor and exhausted through said second air opening
said main housing includes a wall for directing ambient air to said electric motor and isolating ambient air directed to said electric motor from air being exhausted from said electric motor.
7. An electric garden tiller comprising:
a sound insulative sleeve surrounding an electric motor mounted within a housing and a transmission connected to said electric motor;
a tine shaft having at least one tine mounted thereon and connected to said transmission;
a handle extending away from said electric motor;
said housing including a first portion having a first air opening and a second portion having a second air opening;
said insulative sleeve having an upper opening and a lower opening allowing ambient air to be directed to said electric motor and exhausted through said second air opening;
a separation wall in said housing for directing ambient air to said electric motor and isolating ambient air directed to said electric motor from air being exhausted from said electric motor.
8. An electric garden tiller comprising:
a main housing;
an electric motor mounted within said housing;
a transmission connected to said electric motor;
a tine shaft connected to said transmission;
a tine mounted to said tine shaft;
a handle extending away from said electric motor;
a sound insulative sleeve mounted around said electric motor;
said main housing including a first portion having a first air opening;
and a second portion having a second air opening;
said insulative sleeve having an upper opening and a lower opening whereby ambient air is directed to said electric motor and exhausted;
said main housing includes a wall for directing ambient air to said electric motor and isolating ambient air directed to said electric motor from air being exhausted from said electric motor.
9. An apparatus as claimed in claim 8 wherein said handle is mounted to said transmission housing.
10. An apparatus as claimed in claim 8 including said second air opening in said lower front portion of said main housing.
11. An apparatus as claimed in claim 8 further comprising an operating safety means includes a biased pivotal lever connected to said handle, a biased blocking slide connected to said handle and an electrical switch connected to said handle and being engageable by said pivotal lever.
12. An apparatus as claimed in claim 8 wherein said handle is movable between a folded storage position and an extended use position and including a set of wheels movable between a folded storage position and an extended use position.