Abstract: A portable knockdown decontamination chamber is disclosed for use with a liquid decontaminant supply to apply a confined liquid decontaminant wash to a subject located in the chamber. A base of the chamber includes an upwardly opening channel formed generally around its periphery. A wall construction having arcuate corner panels and planar panels therebetween includes a lower edge shaped to fit in the channel so that the corner and planar panels are supported on the base with the lower edge residing in the channel. The base is formed by a subbase and a liner that have interacting rib structures, and the ribs are configured to provide a drainage network so that liquid accumulating in the channel is drained into a sump formed at one end of the base. A top has a downwardly opening groove extending generally around its periphery for receiving an upper edge of the wall construction so that the top can be placed in a supporting relationship on the wall construction.

Abstract: A power lawn mower having a transversely arranged tubular grip for manual control rockable forwardly from a reference position to adjust a power control member. The grip is of oval cross section dimensioned to fit the grasp of the operator's hands. When the grip is in reference position the long dimension of the oval is angled rearwardly and downwardly so as to be substantially parallel to the operator's palms in a natural grasping position, so that the operator can sense by the orientation of his hands the neutral, or starting, position of the power control member and, upon forward rocking, the degree of departure from neutral position. A safety latch is provided for securely latching the grip in its reference position. A latch-releasing trigger on the grip is positioned to be manually engageable by at least one hand of the operator incident to grasping the grip for releasing the latch and thereby releasing the grip for forward rocking movement.