Portable riser apparatus having a lifting and locking assembly

Details Portable riser apparatus having a lifting and locking assembly Portable riser apparatus having a lifting and locking assembly

2004-02-26

2009-06-16

A, Phi D. (Department: 3633)

Static structures (e.g., buildings)

With stadium or auditorium feature

Seating arrangement

C052S009000, C052S007000, C182S132000

Reexamination Certificate

active

07546705

ABSTRACT:
There is provided a portable riser having an operator actuated lifting assist assembly operatively coupled to a riser deck. In one aspect, there is a first pivot mechanism coupled to a first support leg and adapted to initiate upward movement of the portable riser from a collapsed position when a downward force is applied to the first support leg, and a second pivot mechanism coupled to a second support leg and adapted to continue the upward movement. The lifting assist assembly provides a lifting force that continues upward movement to an upright position where the portable riser in locked. There is included a riser unlocking means for unlocking the lifting assist assembly. The portable riser remains in the upright position until the riser unlocking means is operated and a collapsing force is applied to the portable riser sufficient to overcome the lifting force and enable collapsed of the portable riser.

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