Abstract: A gas release device that includes a reservoir of pressurised gas and a passageway from said reservoir to an outlet. There is an elastic gas permeable membrane in the passageway that allows gas release only via the membrane. A gas impermeable member is provided in the passageway that includes an interface positioned to contact said gas permeable membrane. Displacement of the gas permeable membrane is responsive to the pressure of the gas in the reservoir such that there is a greater interfacial contact between the gas impermeable member and the gas permeable membrane at a higher gas pressure than at lower pressure to thereby vary the exposed cross sectional area of the permeable membrane available to the flow in an inverse relationship to pressure.

Abstract: A gas release device that includes a reservoir of pressurised gas and a passageway from said reservoir to an outlet. There is an elastic gas permeable membrane in the passageway that allows gas release only via the membrane. A gas impermeable member is provided in the passageway that includes an interface positioned to contact said gas permeable membrane. Displacement of the gas permeable membrane is responsive to the pressure of the gas in the reservoir such that there is a greater interfacial contact between the gas impermeable member and the gas permeable membrane at a higher gas pressure than at lower pressure to thereby vary the exposed cross sectional area of the permeable membrane available to the flow in an inverse relationship to pressure.

Abstract: A stump cutting assembly mounted to a stump cutting wheel. Stump cutting assembly is a stump cutting tooth interconnected to the wheel by a holder or block that is fixed to wheel by welding or other equivalent process, an optional debris deflector and a fastener that interconnects tooth and deflector to holder. As wheel rotates about its axis of rotation, the tooth cuts away at wood or other debris in which it comes into contact through the side to side and/or longitudinal movement of a stump grinder unit.

Abstract: A stump cutting assembly mounted to a stump cutting wheel. Stump cutting assembly is a stump cutting tooth interconnected to the wheel by a holder or block that is fixed to wheel by welding or other equivalent process, an optional debris deflector and a fastener that interconnects tooth and deflector to holder. As wheel rotates about its axis of rotation, the tooth cuts away at wood or other debris in which it comes into contact through the side to side and/or longitudinal movement of a stump grinder unit.

Abstract: Disclosed is a shielding assembly for use within a substrate deposition processing chamber. The shielding assembly permits sputtering and evaporation processes to take place without the target material depositing upon the internal non-disposable surfaces of the chamber. The shielding assembly is of an improved construction which permits it to be uncoupled from an adapter plate without the need for removing the adapter plate from the deposition chamber.

Abstract: A gas generating initiator includes a generally cylindrical body defining an initiator chamber therein, the body being open at one end and closed at a second end by a base, the body having a longitudinal axis; the base including a generally centrally located first passage therethrough having one end on an interior surface of the base and a second end on an exterior surface of the base, a longitudinal axis of the first passage being substantially coincident with the axis of the body; and a plurality of second passages in the base, the second passages having one end on an interior surface of the base and a second end that intersects the first passage at the second end of the first passage, wherein longitudinal axes of the second passages form angles with the longitudinal axis of the first passage and wherein a diameter of the first passage is greater than diameters of the second passages.