Post by Greg Goss Post by Whiskers
Doesn't look safe, to me. Heavy things shouldn't be balanced on a
single axle; the whole thing is on the point of toppling either towards
or away from the operator.
I disagree. You think wheelbarrows are unsafe? Supporting things
mechanically while the operator provides the balance has been entirely
normal for centuries. With a wheelbarrow, the operator is providing
balance in TWO axes.
I notice at one point, he uses this lifter to move a fridge dolly. Do
you also think that two-wheel dollies are unsafe? I was a household
mover for several years and have moved literally tons of books over
the years. I think that the single axle of a two-wheeler is perfectly
This is just an advanced version of a two-wheeler or wheelbarrow.
The difference with a wheelbarrow is that the load is never more than an
inch or so above the axle, and never forwards of it.
The device in the clip is shown lifting very heavy things some feet
above the axle, and sometimes in front of it, and the operator is at
risk of being lifted off his feet or falling beneath the load, neither
of which can happen with a wheelbarrow. The device in the clip also has
very small wheels, which make it vulnerable to uneven floors or small
A wheelbarrow is inherently stable; if you let go, the back legs drop an
inch or two onto the ground and the barrow stops moving with the load
still on board. The rear wheels on the device in the clip are a couple
of feet above the ground, and the load moves from in front of the front
axle to behind it and back again, so if the operator lets go the device
will either dump the load forwards or will crash down onto its rear
wheels and who knows what it will do then? (It looks as if that fridge
might be catapulted backwards towards the operator).
I'm sure there are stable three or four wheeled fork-lift trolleys
available that will perform a lot more safely. Here's one maker
<http://www.electriclift.us/> "Protema from TAWI - electric lift
trolley" that seems to have such things.
Any 'dolly' that needs a tall heavy object to be tilted off balance, is
risky. If you were moving crates of books or other heavy things around,
I would expect you to have used a traditional trolley such as this
and a separate hoist for getting things into and out of the van. Notice
that the load is never very far off the ground.