Aerial lift with safety device
AssigneeBluesky Solutions Limited
InventorPaul Cummings
Life of this patent
Estimating the term…
Abstract
A safety device for an aerial lift (10) having a basket (20) with controls (23) which permit an operator to manoeuvre the basket (20), and a foot operable safety switch (24) which activates the controls (23), the safety device comprising an auxiliary safety switch (24) operated by a trip cord (27) arranged proximate to the controls (23) and which is connected in series with the foot safety switch (24) so that in the event that the cord is distorted the auxiliary switch (26) prevents activation of the control panel (23) and may additionally operate an alarm.
Claims12
A safety device for an aerial lift having a basket or cage with controls which permits an operator standing in the basket to manoeuvre the basket to a desired location, a foot operable safety switch which provides a switch-closed signal to further control means before said controls become operable, the safety device comprising a tensioned wire or cord arranged proximate to said controls and an auxiliary safety switch connected in series with the foot safety switch, the auxiliary switch having a first set of contacts in use held in a closed condition (Switch on) by said tensioned cord or wire, and in the event that the cord is distorted the contacts are changed to a open condition (switch off) thereby cutting off the switch closed signal.
Dependencies are inferred from the claim text.