Abstract: A resistance device for providing resistance. The device includes a flexible pulling element, a resilient arrangement and a transmission. The resilient arrangement has a first portion and a second portion. The second portion is resiliently movable relative to the first portion. The transmission connects the flexible pulling element to the resilient arrangement such that pulling upon the flexible pulling element moves the second portion relative to the first portion, and upon release of the flexible pulling element the resilient arrangement retracts the flexible pulling element. The transmission is a reduction arrangement such that pulling the flexible pulling element a distance moves the second portion, relative to the first portion, no more than a proportion of the distance. The proportion is no more than half.

Abstract: A resistance device for providing resistance. The device includes a flexible pulling element, a resilient arrangement and a transmission. The resilient arrangement has a first portion and a second portion. The second portion is resiliently movable relative to the first portion. The transmission connects the flexible pulling element to the resilient arrangement such that pulling upon the flexible pulling element moves the second portion relative to the first portion, and upon release of the flexible pulling element the resilient arrangement retracts the flexible pulling element. The transmission is a reduction arrangement such that pulling the flexible pulling element a distance moves the second portion, relative to the first portion, no more than a proportion of the distance. The proportion is no more than half.

Abstract: A resistance device for providing resistance. The device includes a flexible pulling element, a resilient arrangement and a transmission. The resilient arrangement has a first portion and a second portion. The second portion is resiliently movable relative to the first portion. The transmission connects the flexible pulling element to the resilient arrangement such that pulling upon the flexible pulling element moves the second portion relative to the first portion, and upon release of the flexible pulling element the resilient arrangement retracts the flexible pulling element. The transmission is a reduction arrangement such that pulling the flexible pulling element a distance moves the second portion, relative to the first portion, no more than a proportion of the distance. The proportion is no more than half.

Abstract: A water aeration system powers an air pump held in an encasement with a solar panel mounted directly or indirectly to the encasement or to the mounting pole supporting the encasement above a ground surface. An air conduit directs pumped air to one or more disc diffusers submerged in the body of water to be aerated. The disc diffuser(s) are supported by a floating platform that is suspended from a buoy or float so that the disc diffuser(s) are held at a desired depth below the water surface.

Abstract: A resistance device for providing resistance. The device includes a flexible pulling element, a resilient arrangement and a transmission. The resilient arrangement has a first portion and a second portion. The second portion is resiliently movable relative to the first portion. The transmission connects the flexible pulling element to the resilient arrangement such that pulling upon the flexible pulling element moves the second portion relative to the first portion, and upon release of the flexible pulling element the resilient arrangement retracts the flexible pulling element. The transmission is a reduction arrangement such that pulling the flexible pulling element a distance moves the second portion, relative to the first portion, not more than a proportion of the distance. The proportion is not more than half.

Abstract: A container, movable between collapsed and expanded conditions, has a plurality of walls connected between bottom and top structures. A first wall of the plurality of walls includes first and second sections that connect together at a fold line about which the sections are rotatable between first wall collapsed and expanded conditions. The first section is connected to the bottom structure and the second section is connected to the top structure. The first wall is expandable by rotation of the first section relative to the second section in a first direction of rotation about the fold line from the first wall collapsed condition and into engagement with an abutment at the first wall expanded condition which arrests further rotation of the first section relative to the second section. The first wall is maintained in the first wall expanded condition by a load applied to the first wall.

Abstract: A water aeration system powers an air pump held in an encasement with a solar panel mounted directly or indirectly to the encasement or to the mounting pole supporting the encasement above a ground surface. An air conduit directs pumped air to one or more disc diffusers submerged in the body of water to be aerated. The disc diffuser(s) are supported by a floating platform that is suspended from a buoy or float so that the disc diffuser(s) are held at a desired depth below the water surface.

Abstract: A water aeration system powers an air pump held in an encasement with a solar panel mounted directly or indirectly to the encasement or to the mounting pole supporting the encasement above a ground surface. An air conduit directs pumped air to one or more disc diffusers submerged in the body of water to be aerated. The disc diffuser(s) are supported by a floating platform that is suspended from a buoy or float so that the disc diffuser(s) are held at a desired depth below the water surface.

Abstract: A water aeration system powers an air pump held in an encasement with a solar panel mounted directly or indirectly to the encasement or to the mounting pole supporting the encasement above a ground surface. An air conduit directs pumped air to one or more disc diffusers submerged in the body of water to be aerated. The disc diffuser(s) are supported by a floating platform that is suspended from a buoy or float so that the disc diffuser(s) are held at a desired depth below the water surface.

Abstract: A water aeration system (10) encases an air pump (60) and a solar power controller (62) in an encasement structure (34) with one or more air permeable sidewalls (42; 44). The encasement structure is mounted at or near a top end of a mounting pole (32). A solar panel (50) is mounted directly or indirectly to the encasement or to the mounting pole at or near the top end of the mounting pole, optionally with screens (80, 82, 84, 86) connected to the backside of the solar panel. An air conduit (20) is threaded through a hollow channel in the mounting pole or structure associated therewith, and then underground and/or under water for joining to an immersed diffuser (12).

Abstract: A container, movable between collapsed and expanded conditions, has a plurality of walls connected between bottom and top structures. A first wall of the plurality of walls includes first and second sections that connect together at a fold line about which the sections are rotatable between first wall collapsed and expanded conditions. The first section is connected to the bottom structure and the second section is connected to the top structure. The first wall is expandable by rotation of the first section relative to the second section in a first direction of rotation about the fold line from the first wall collapsed condition and into engagement with an abutment at the first wall expanded condition which arrests further rotation of the first section relative to the second section. The first wall is maintained in the first wall expanded condition by a load applied to the first wall.

Abstract: A water aeration system (10) encases an air pump (60) and a solar power controller (62) in an encasement structure (34) with one or more air permeable sidewalls (42; 44). The encasement structure is mounted at or near a top end of a mounting pole (32). A solar panel (50) is mounted directly or indirectly to the encasement or to the mounting pole at or near the top end of the mounting pole, optionally with screens (80, 82, 84, 86) connected to the backside of the solar panel. An air conduit (20) is threaded through a hollow channel in the mounting pole or structure associated therewith, and then underground and/or under water for joining to an immersed diffuser (12).

Abstract: A water aeration system (10) encases an air pump (60) and a solar power controller (62) in an encasement structure (34) with one or more air permeable sidewalls (42; 44). The encasement structure is mounted at or near a top end of a mounting pole (32). A solar panel (50) is mounted directly or indirectly to the encasement or to the mounting pole at or near the top end of the mounting pole. An air conduit (20) is threaded through a hollow channel in the mounting pole or structure associated therewith, and then underground and/or under water for joining to an immersed diffuser (12). The water aeration system operates without a battery or energy accumulator, and is tamper-resistant. The system is protected from tampering where the air pump and controller are inside the encasement structure, the solar panel and encasement structure are mounted several feet above the ground surface, and the conduit between the pump and the diffuser is held inside the mounting pole or structure associated therewith.

Abstract: A water aeration system encases an air pump and a solar power controller in an encasement structure with one or more air permeable sidewalls. The encasement structure is mounted at or near a top end of a mounting pole. A solar panel is mounted directly or indirectly to the encasement or to the mounting pole at or near the top end of the mounting pole. An air conduit is threaded through a hollow channel in the mounting pole, and then underground and/or under water for joining to an immersed diffuser. The water aeration system operates without a battery or energy accumulator, and is tamper-resistant. The air pump and controller are inside the encasement structure, the solar panel and encasement structure are mounted several feet above the ground surface, and the conduit between the pump and the diffuser is held inside the mounting pole.

Abstract: A water aeration system encases an air pump and a solar power controller in an encasement structure with one or more air permeable sidewalls. The encasement structure is mounted at or near a top end of a mounting pole. A solar panel is mounted directly or indirectly to the encasement or to the mounting pole at or near the top end of the mounting pole. An air conduit is threaded through a hollow channel in the mounting pole, and then underground and/or under water for joining to an immersed diffuser. The water aeration system operates without a battery or energy accumulator, and is tamper-resistant. The air pump and controller are inside the encasement structure, the solar panel and encasement structure are mounted several feet above the ground surface, and the conduit between the pump and the diffuser is held inside the mounting pole.

Abstract: A personal safety protective device that includes a lens and a support structure onto which the lens is secured. The lens includes a substrate and a hard-coat layer located on the substrate of the lens. The hard-coat layer has a low surface energy outer surface that is derived from a) an additive that includes at least one of i) a perfluoropolyether urethane that includes hydrolysable silane groups, and ii) an acrylate polymer that includes at least one perfluoropolyether moiety and at least one hydrolysable silane group, and b) a silsesquioxane-based hard-coat composition. The provision of such a lens on a personal safety protective device enables the lens to be durable to abrasion and to be easily cleaned without use of solvents that could shorten the service life of the lens.

Abstract: Fluorochemical urethane compounds and coating compositions derived therefrom are described. The compounds and compositions may be used in treating substrates, in particular substrates having a hard surface such as ceramics or glass, to render them water, oil, stain, and soil repellent.

Abstract: Fluorochemical urethane compounds and coating compositions derived therefrom are described. The compounds and compositions may be used in treating substrates, in particular substrates having a hard surface such as ceramics or glass, to render them water, oil, stain, and soil repellent.