Abstract: A pneumatic particulate blaster apparatus consisting of a hopper having an open top for receiving particulate material and having a lower terminus communicating with generally cylindrically configured hollow tubing, vibrating means mounted on a lower side of the hopper, auger means in the tubing for feeding the particulate material received from the hopper to a nozzle at a distal end of the tubing and being driven by a prime mover from the other end of the tubing, particulate mix chamber communicating with the distal end of the tubing and receiving air at an inlet above the particulate mix chamber allowing particulate mix tending to aerate with air in a gravitational fall path through a distance in the particulate mix chamber and exiting adjacent a set of multiple venturi orifices in the nozzle communicating therewith, an air receiver tank for communicating with the multiple venturi orifices and having the multiple venturi orifices disposed generally inclined about 10.degree.

Abstract: A plurality of inflatable and floatable buoyant members uniquely configured and connected on slack lines adaptable to yielding to high tide and storm conditions and in which the lines are secured to anchor members, the members being hollow for receiving a fluid such as water of air, or both, and check valves for locking of closing off the fluid flow as desired. By positioning the buoyant members in the path of sea waves and by minute adjustments of buoyancy, maximizing of dissipation of the waves is achieved.

Abstract: Concrete is manufactured by mixing cement with substantially the exact precise quantities of water needed to produce a setting of the cement, agitating the mixture until its viscosity is substantially reduced, adding dry sand or other agrigate, mixing with a slurry, patting the mixture through a nozzle where air is introduced under a pressure and air is emitted in the form of jets into the tapering part of the nozzle, and the mixture is vibrated to achieve maximized distribution of its components while being blended and recombined during the process of gunning and feeding to the location of distribution. The concrete mix may be applied appropriately to a gun assembly or a gun type device designed dispense entrained granular materials in a compressed stream onto a work area.

Abstract: A new and improved pneumatically shaped ear plug comprising and constructed of an elastomeric hollow body of sheet material dimensioned to and constructed for being inserted into the ear canal or ear cavity, and end of the cylindrical hollow body being of a material performing as a diaphragmatic member so that when it is depressed, the volume of air therein extends the cylindrical side, and vice versa, said end member having a lead or handle means for retracting said diaphragm when it is depressed for restoring it to its original condition, said end member being of such resiliency of said elastomeric material that it retains its depressed condition when it has been so depressed, and retains its released condition when it has been released, thereby constituting a dual state condition as operated upon by action on said diaphragmatic member.