A retractable pontoon boat has a deck, a starboard pontoon and a port pontoon, a center beam coupled to the underside of the deck and running substantially from bow to stern, a plurality of pivoting arms coupling the pontoons to the center beam, a plurality of bearings interposed between the deck and the pivoting arms, and one or more linear actuators for actuating the pivoting arms; wherein, in a first, retracted position, the pontoons are substantially underneath the deck; and wherein, in a second, extended position, the pontoons are substantially extended from underneath the deck.

A retractable pontoon boat has a deck, a starboard pontoon and a port pontoon, a center beam coupled to the underside of the deck and running substantially from bow to stern, a plurality of pivoting arms coupling the pontoons to the center beam, a plurality of bearings interposed between the deck and the pivoting arms, and one or more linear actuators for actuating the pivoting arms; wherein, in a first, retracted position, the pontoons are substantially underneath the deck; and wherein, in a second, extended position, the pontoons are substantially extended from underneath the deck.

Described are various embodiments for coupling devices for dock installations.

Mobile pontoon and ferry crossing equipment as well as a pontoon and a ferry accompanying this equipment, whereas crossing equipment comprises at least one foldable ferry or one foldable pontoon, each of which has a compact modular design composed of float modules and equipped with self-aligned joining elements that stabilized these modules, according to the invention is characterized by the fact that the foldable ferry (1) or foldable pontoon (2) in its closed condition for transportation forms a semi-trailer or a trailer, whose self-supporting chassis (3) is at the same time a basic float module of the foldable ferry (1) or foldable pontoon (2) respectively.

Mobile pontoon and ferry crossing equipment as well as a pontoon and a ferry accompanying this equipment, whereas crossing equipment comprises at least one foldable ferry or one foldable pontoon, each of which has a compact modular design composed of float modules and equipped with self-aligned joining elements that stabilized these modules, according to the invention is characterized by the fact that the foldable ferry (1) or foldable pontoon (2) in its closed condition for transportation forms a semi-trailer or a trailer, whose self-supporting chassis (3) is at the same time a basic float module of the foldable ferry (1) or foldable pontoon (2) respectively.

A method of installing a dock includes providing first and second dock sections, each having a bottom transport member, and a dock support that supports the dock section when installed. The first dock section is installed adjacent to a shoreline. The dock lifting device of a dock cart is attached to the second dock section and the lifting device of the dock cart lifts the first end of the second dock section such that the second dock section is supported by the bottom transport member and the cart transport member. The cart moves the second dock section along the first dock section until the first end of the second dock section is adjacent to the second end of the first dock section. The lifting device then lowers the first end of the second dock section to be level with the second end of the first dock section.

A self-deploying float assembly to support mechanical equipment such as aerators and mixers for use in water, wastewater and process water stream treatment basins and a method of installing same.

A self-deploying float assembly to support mechanical equipment such as aerators and mixers for use in water, wastewater and process water stream treatment basins and a method of installing same.

A self-deploying float assembly to support mechanical equipment such as aerators and mixers for use in water, wastewater and process water stream treatment basins and a method of installing same.

A self-deploying float assembly to support mechanical equipment such as aerators and mixers for use in water, wastewater and process water stream treatment basins and a method of installing same.