Abstract: A liquid level maintainer for controlling a liquid level in a reservoir. The liquid level maintainer includes an inlet configured to be coupled to a source of pressurized fluid, an opening configured to receive liquid from the reservoir, a first outlet, and a second outlet. A first flow path is defined between the inlet and the first outlet, and a second flow path is defined between the inlet and the second outlet. A constriction is disposed in the second flow path, the constriction configured to provide a pressure differential in the second flow path for drawing the liquid from the opening towards the constriction. A third flow path is defined between the opening and the constriction. A valve is disposed in at least one of the first or second flow paths and configured to selectively open and close the at least one of the first or second flow paths.

Abstract: A modular garage door opener system and method including a garage door opener having a motor that is configured to be coupled to a garage door to open and close the garage door. The garage door opener includes a first accessory port including a first accessory mounting interface and a second accessory port disposed on the garage door opener including a second accessory mounting interface. An accessory device including a first mounting interface engages the first accessory mounting interface to couple the accessory device to the first accessory port. The accessory device may be disengaged from the first accessory mounting interface and then engage the second accessory mounting interface to couple the accessory device to the second accessory port. Additionally, a second accessory device may engage the first accessory port after disengagement of the accessory device.

Abstract: An accessory device system includes a garage door opener, an adapter, and one or more accessory devices whereby the garage door opener has a first accessory device port configured to selectively couple to the one or more accessory devices and the adapter has a second accessory device port configured to selectively couple to the one or more accessory devices. The garage door opener is further configured to provide power to a first accessory device of the one or more accessory devices via the first accessory device port. The adapter further includes a battery receiving portion configured to be selectively coupled to a battery pack and to receive power from the battery pack, and the adapter is further configured to provide power, received from the battery pack, to the first accessory device via the second accessory device port.

Abstract: A modular garage door opener system and method including a garage door opener having a motor that is configured to be coupled to a garage door to open and close the garage door. The garage door opener includes a first accessory port including a first accessory mounting interface and a second accessory port disposed on the garage door opener including a second accessory mounting interface. An accessory device including a first mounting interface engages the first accessory mounting interface to couple the accessory device to the first accessory port. The accessory device may be disengaged from the first accessory mounting interface and then engage the second accessory mounting interface to couple the accessory device to the second accessory port. Additionally, a second accessory device may engage the first accessory port after disengagement of the accessory device.

Abstract: A drain clearing device including an elongated shaft having a first end and a second end and a collecting member having a fixed end and a free end. The fixed end is coupled to the elongated shaft proximate the first end, and the free end is movable relative to the fixed end from a collapsed position to an extended position, in which the elongated shaft is substantially surrounded by the collecting member.