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Lightweight Pole Stabilized Scissor Lift

[Category : - DESIGN PATENTS]
[Viewed 402 times]

scissor lift is a piece of commercial equipment that comprises a compartment (or bucket) designed to carry a human that is mounted on the distal end of an extensible scissor-style boom that extends vertically upwardly. The boom in turn is attached to a weighted base that acts to stabilize the bucket while the bucket is vertically extended with one or more persons in the bucket. The base can include motorized wheels that permits it to be shuttled to a desired location.
Even small portable scissor lifts tend to be very heavy. A one man scissor lift 10 as shown in Figure 1 that can extend the bucket 45 a moderate 8-14 feet high typically weights about 1000 lbs. Much of this weight is contained in a base 15 that includes a center compartment 20 containing a substantial amount of ballast 20. Because these units are so heavy they are usually supported by wheels 25 & 30, two of which are driven by an electric motor to facilitate moving the lift around. Batteries are provided to propel the drive wheels but also power an hydraulic pump that is operatively coupled with hydraulic actuators 40. The hydraulic actuators in turn raise and lower the scissor mechanism 35 and the associated bucket.
While these portable scissor lifts are more than small enough to be received in a standard 1?2 ton pickup bed, they strain the capacity of the truck especially when other equipment and gear must be transported as well. Even when the load weight is not an issue, getting the lift in and out of the truck bed can be difficult. At least three and preferably four men are required to move a typical lift from a pickup bed and even then it is a very heavy and potentially dangerous lift.
Given the weight, a heavier duty truck is typically required to transport a prior art scissor lift, and a motorized lift deck is also required since the scissor lift cannot be safely lifted by a typical two- man work crew. Because of this, a work crew requiring the one man portable scissor lift, such as a municipal crew tasked with maintaining utility poles, has to not only reserve the lift for use but also reserve a suitable truck to transport it. As one can imagine, a maintenance facility may only have a limited number of heavy duty trucks with lift decks, and as such, a suitable truck may not be available when a crew needs it to transport the scissor lift. This can slow down maintenance or repair of a condition that requires a lift to reach it.

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nguyenb (United States)

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