Abstract: An aeration system for treating liquid contained in a vessel is provided. The aeration system includes a header pipe and a plurality of lateral pipes coupled to the header pipe. The lateral pipes each have one or more tubular diffuser membranes sleeved therearound. Also provided is a coupling for sealingly joining end portions of two adjacent pipes is provided. The coupling includes two saddle sections and a deformable gasket extending between the pipes. The coupling is adapted for enabling one pipe to be removed and replaced from a series of pipes without substantially moving any adjacent pipes.

Abstract: An aeration system for treating liquid contained in a vessel is provided. The aeration system includes a header pipe and a plurality of lateral pipes coupled to the header pipe. The lateral pipes each have one or more tubular diffuser membranes sleeved therearound. Also provided is a coupling for sealingly joining end portions of two adjacent pipes is provided. The coupling includes two saddle sections and a deformable gasket extending between the pipes. The coupling is adapted for enabling one pipe to be removed and replaced from a series of pipes without substantially moving any adjacent pipes.

Abstract: A toilet seat hinge for releasably securing a toilet seat to a toilet bowl. The hinge comprises a mounting post and a hinge post. The mounting post is fixed to the toilet bowl. Various alternative constructions are employed for releasably securing the hinge post to the mounting post such that the hinge post and the toilet seat can be removed from the toilet bowl without removing the mounting post.

Abstract: A lift-off toilet seat hinge comprising a hinge base member adapted to be mounted on a toilet bowl, a hinge support member adapted to pivotally support a toilet seat, a locking member supported for rotation between a locked position, where the support member is secured to the base member, and an unlocked position, and an indicator for indicating when the locking member is in the locked position. The base member and the locking member include corresponding arcuate projections which engage when the locking member is in the locked position. The indicator includes a pair of engagement surfaces which engage when the locking member is in the locked position. In one embodiment, the engagement surfaces are provided by a projection on the locking member and a first recess and a second recess in the support member, and the projection extends into the first recess when the locking member is in the locked position.

Abstract: The explosion attenuating vent cap for storage batteries according to the present invention features an electrolyte drain and baffle design adapted for maximizing return to the battery of any liquid which may enter the vent from vibration, tilting, overheating, overcharge and the like. The vent barrel(s) include a step to assist in closure of the fill openings, and baffles within the vent prevent accumulation of electrolyte within the cap. The arrangement of the entrance to the gas escape passage (leading through an explosion attenuation device such as a disc of microporous polymer) is located on the center lines of the barrel and at the highest possible location within the vent to minimize the intrusion of electrolyte into the attenuation material. This location of the entrance prevents accumulation of electrolyte at that location. Preferably, the vent cap is of the ganged variety, i.e. useful for simultaneously capping three or more fill openings of the battery.