Abstract: Embodiments provide a pool cleaner with a housing, a first drive wheel positioned along a first side of the housing, and a second drive wheel positioned along a second side of the housing. The pool cleaner also includes a steering system engaged with the first drive wheel and the second drive wheel. The steering system includes a rotating cam with a first cam profile and a second cam profile different from the first cam profile. The steering system drives the housing in a cycle of forward and turn movements by rotating the first drive wheel based on the first cam profile and rotating the second drive wheel based on the second cam profile.

Abstract: A paddle wheel mechanism for a pool cleaner is provided. The paddle wheel mechanism includes a housing, a paddle wheel shaft, and a paddle wheel. The housing includes an internal flow area and the paddle wheel shaft is supported by the housing. The paddle wheel is supported by the paddle wheel shaft and includes a paddle wheel base extending along a base width, a first-type blade, and a second-type blade. The first-type blade extends radially outward from the paddle wheel base and includes a first blade portion extending from a first side of the paddle wheel base for a first blade width less than the base width. The second-type blade extends radially outward from the paddle wheel base and includes a second blade portion extending from a second, opposite side of the paddle wheel base for a second blade width less than the base width.

Abstract: Embodiments of the invention provide a paddle wheel mechanism for a pool cleaner. The paddle wheel mechanism includes a housing with an internal flow area, a paddle wheel shaft supported by the housing, and a paddle wheel supported by the paddle wheel shaft. The paddle wheel includes a base extending along a base width and a plurality of paddle wheel blades extending from the base within the internal flow area. The plurality of paddle wheel blades include a first-type blade with a first blade portion having a first blade width, and a second-type blade with a second blade portion having a second blade width. The first blade width and the second blade width are each less than the base width, and the first-type and second-type blades are arranged on the base in an alternating manner.

Abstract: Embodiments provide a pool cleaner with a housing, a first drive wheel positioned along a first side of the housing, and a second drive wheel positioned along a second side of the housing. The pool cleaner also includes a steering system engaged with the first drive wheel and the second drive wheel. The steering system includes a rotating cam with a first cam profile and a second cam profile different from the first cam profile. The steering system drives the housing in a cycle of forward and turn movements by rotating the first drive wheel based on the first cam profile and rotating the second drive wheel based on the second cam profile.

Abstract: Some embodiments provide a pool cleaner including a first drive wheel, a second drive wheel, a turbine paddle, and a steering system. The turbine paddle is configured to rotate based on water movement through the pool cleaner. The steering system is engaged with the first drive wheel, the second drive wheel, and the turbine paddle and is driven by rotation of the turbine paddle. The steering system includes a cam with a first cam profile and a second cam profile different from the first cam profile. The steering system is configured to drive the pool cleaner in forward, reverse, and turn movements by rotating the first drive wheel based on the first cam profile and rotating the second drive wheel based on the second cam profile.

Abstract: Embodiments of the invention provide a paddle wheel mechanism for a pool cleaner. The paddle wheel mechanism includes a housing with an internal flow area, a paddle wheel shaft supported by the housing, and a paddle wheel supported by the paddle wheel shaft. The paddle wheel includes a base extending along a base width and a plurality of paddle wheel blades extending from the base within the internal flow area. The plurality of paddle wheel blades include a first-type blade with a first blade portion having a first blade width extending along the paddle wheel base from a first side of the paddle wheel base, and a second-type blade with a second blade portion having a second blade width extending along the paddle wheel base from a second side of the paddle wheel base. The first blade width and the second blade width are each less than the base width, and the first-type and second-type blades are arranged on the base in an alternating manner.

Abstract: Some embodiments provide a pool cleaner including a first drive wheel, a second drive wheel, a turbine paddle, and a steering system. The turbine paddle is configured to rotate based on water movement through the pool cleaner. The steering system is engaged with the first drive wheel, the second drive wheel, and the turbine paddle and is driven by rotation of the turbine paddle. The steering system includes a cam with a first cam profile and a second cam profile different from the first cam profile. The steering system is configured to drive the pool cleaner in forward, reverse, and turn movements by rotating the first drive wheel based on the first cam profile and rotating the second drive wheel based on the second cam profile.

Abstract: A substance delivery device includes a combustible paperboard strip and at least one substance toxic to insects and a perfume. The delivery device can take the form of a coil and includes a flexible backing sheet for supporting the combustible paperboard strip. The flexible backing sheet is not capable of combustion. Additionally, the material of the paperboard strip can include a combustion promoter.