A replaceable cavity insert for use in a multi-cavity compression mold, wherein each cavity insert is friction fitted into a respective mold recess. Each insert has a substantially semi-spherical insert surface and defined in the surface is an inverted dimple pattern of a golf ball. Each cavity insert has an O-ring recessed in the upper perimeter to limit the flow of heating and cooling fluids beyond the perimeter. The cavity insert and the O-ring are retained in the recess of the frame by a pai...

A blind cavity is thoroughly flushed free of foreign matter by apparatus for pumping hydraulic oil up through a tube of lesser diameter than the access opening to the cavity and returning the exit flow of the contaminated fluid to the pump through a coaxial bore surrounding the tube and of larger diameter than both the access opening and the tube.

Nonlinear optical cavities comprising a single or multiple ring paths for use with diode lasers are presented. In one embodiment, the total internal reflection surface of a monolithic or composite cavity is fabricated into a plurality of nonparallel planes. In another embodiment, a composite cavity with either a single end piece or a plurality of end pieces bound to a nonlinear resonator crystal is used to generate either a single or multiple ring paths. In several of the embodiments, incident l...

The oscillations found to occur in the cavities of an structural frame moving through a fluid are substantially eliminated by the adoption of perturbation elements located at the leading edge of the cavity and reflecting any remaining oscillations out of the cavity at the trailing edge. The perturbation elements may take the form of multiple pins of various shape and geometrical arrangement which prevents the generation and growth of vortices causing acoustic oscillations. The reflection of rema...

A tool holder includes two opposite surfaces, a number of openings formed in the tool holder for receiving tools, and one or more projections formed in the tool holder for engaging with the tools so as to retain the tools in the openings, the openings are extended through the tool holder and opened in both of the opposite surfaces such that the tools can be easily reached from either side of the tool holder.

An apparatus for locating a body cavity having a fluctuating fluid pressure by signaling the fluctuating pressure when the cavity is entered and then transporting fluid either into or out of the cavity.

A method for loading a fluent material, for example slurry explosive or cement grout, into a cavity, the material being fed through one end of a loading tube against a free double-acting piston in the loading tube and expelled through the same end into the cavity by pressurised fluid acting on the piston. The invention also includes the cavity loading apparatus.

A method and apparatus are described for filling a blind cavity, for example a blister of a blister pack, with a quantity of powder. The cavity, with its open side downwards, is urged into a reservoir (30) of powder, and withdrawn from the reservoir with the quantity of powder therein. An elongate sheet (12) with a plurality of blisters disposed along the length thereof preferably passes around, and travels with, a wheel (38) partially immersed in the reservoir (30) of powder.

Sound absorbing members having resonant cavities of different frequency absorption character are made by forcing a structure having open-ended parallel honeycomb cavities through one or more sheets of plastic foam so that foam plugs fill a portion of each cavity; selected foam plugs are removed in order to obtain cavities of different depths and different frequency absorption character, and a closure plate is guided to one side and a porous plate is glued to the other side of the structure.

The present invention discloses a golf putter head with vertical and horizontal cavities.