Abstract: The closure adapted to cover a container aperture defines a retention projection dimensioned to be received in a retention aperture in a wall of the container. An insertion surface on the projection avoids the closure being impeded by an edge of the wall. The projection defines a disengagement surface to remove the projection from the retention aperture and defines a registering surface opposite the registering surface. The closure may be fitted agnostic to the rotational alignment of the closure relative to wall and then twisted relative to the container until resistance is provided by the registering surfaces engaging Automated closure requires only two degrees of movement and only two force sensors.

Abstract: The closure adapted to cover a container aperture defines a retention projection dimensioned to be received in a retention aperture in a wall of the container. An insertion surface on the projection avoids the closure being impeded by an edge of the wall. The projection defines a disengagement surface to remove the projection from the retention aperture and defines a registering surface opposite the registering surface. The closure may be fitted agnostic to the rotational alignment of the closure relative to wall and then twisted relative to the container until resistance is provided by the registering surfaces engaging Automated closure requires only two degrees of movement and only two force sensors.

Abstract: A toilet bowl ventilating apparatus includes a housing secured in cantilever fashion to a mounting arm which is adapted to be mounted to toilet seat mounting bolts of a toilet bowl. The housing has a receptacle for filter medium and a fan to draw air through the housing past the filter medium. The mounting arm is secured substantially symmetrically at a mid-point of the housing and has an outwardly and downwardly extending elongated intake passage that extends down into the toilet bowl. The intake passage is flexibly adjustable over 180 degrees to a selected orientation, thereby enabling the intake passage to change orientation depending upon whether the housing is positioned on the left side or the right side of the toilet bowl.