A boat hull having sealed rigid chambers and a perimeter inflatable portion positioned and attached laterally outward thereof. The perimeter inflatable portions provide redundant buoyancy and allow loads acting upon the hull to be shifted laterally without compromising stability of the boat.

A rotary motion device having piston valves that define an open region that are adapted to engage a power tooth of the power ring as the power ring rotates around the piston valves and the piston valves rotate about their own separate axis that is fixed with respect to the base housing of the device. The power ring is provided with radially inward and outward ports in one form that are adapted to communicate with radially inward and outward ports of a static member of the device. The ports are u...

A trim tab control system adapted to adjust trim tabs to optimize the velocity of a water vessel. The trim tab control system is adapted to have a tilt sensor and a velocity sensor in communication with the microcontroller where the microcontroller records the position of the trim tabs based on trim tab adjustments that the trim tab control system initiates, as well as trim tab adjustments initiated by the helmsman of the water vessel.

A method and apparatus for treating a cutter ring adapted to be used in tunnel boring operations; forming an initial cutter ring and heat treating the cutter ring prior to a laser client process; applying an alloy to the surface of the cutter ring adjacent to cutting elements by a laser cladding process whereby the cutting elements have insufficient heat transfer from the laser cutting process to reduce their hardness properties.

A method and apparatus for removing settleable solids and unsettleable solids from a partially closed flush system in a diary milking operation whereby a first processing tank bottom removes settleable solids contained therein where the net current flow vertically in the process tank is less than the settling rate of the settleable solids contained therein. The process tank batch feeds a plurality of thickening tanks that are each allowed to settle for a period of time before transferring fluid ...

A shelf section either having a bottle holding region or a central wood member supporting a platform and adapted to fit against a wall section where there are exposed 2 by 4 wooden posts at spaced intervals. The shelf section has a horizontal platform, part of which is positioned between adjacent 2 by 4 posts, and the other part extending outwardly from the posts. A pair of mounting flanges attach to the outer surfaces of the 2 by 4s, and a pair of braces extend between the flanges and the platf...

This allows for modular floating gardens that can be fabricated into forms chosen by the end user to be aesthetically pleasing even before planting has matured. Because composite floating gardens created from these modules can be large, their form can be pleasing from a distance. Because these are significant structures, they can be incorporated into a process to improve water quality.

An improved rotary engine and method for determining the contours of the sealing surfaces thereof. The improved engine provides for maintaining a predetermined, optimal gap between the sealing surfaces during rotation. The gap may be parallel or angled, and may be positive or negative so as to form an interference engagement. The rotors of the engine may be provided with mirror-image sealing surfaces so as to prevent development of excessive back-lash and clearance, and also to permit efficient ...

The invention relates to a fin stabilization system adapted to minimize roll about the longitudinal axis of the boat during sharp cornering at very high speeds. In one form, equipment such as a machine gun is mounted to the bow of the boat and targets are adapted to be engaged in high-speed maneuvers when cornering and the deck of the boat is not excessively rolled whereby blocking visibility in a turn.

A golf green repair tool with a depth limiting feature that has an earth engagement surface that has a forward slant to reposition the raised portion around a crater to the center region of the crater. A prong portion is adapted to be thrusted toward the center region of the crater and the repair tool is adapted to do minimal damage to the turf mat and provides a desirable method to repair craters left by impacting golf balls by properly repositioning of the displaced portions.