Abstract: The present invention is related to a fluid metering valve that is specifically constructed to provide fine metering at extremely low flow rates while still providing a full shut-off capability. The fluid metering valve of the present invention is specifically adapted to be utilized in conjunction with corrosive fluids or fluids containing suspended solid particles that would otherwise damage or clog a comparable precision needle valve.

Abstract: An improved fluid-tight tensioning seal is provided for use in apparatus of the type wherein an inside diameter cutting blade is mounted in a circular saw blade housing, the blade being continuously tensioned during the cutting operation. The tensioning seal comprises two pieces, one of which is elastic and moves in sealing relationship within a channel provided in the housing in response to pressurized fluid. The second piece is substantially rigid, abuts the first piece on one side and has a contoured projection extending from its other side for engaging and tensioning the blade.

Abstract: In an apparatus for clamping and uniformly tensioning an inside diameter cutting blade, hydraulic fluid is contained within an annular fluid channel which includes an opening confronting the inside diameter blade. The hydraulic fluid is prevented from contacting the blade by a pressure-transmitting deformable sealing piston mounted within the fluid channel. The sealing piston is generally U-shaped in cross section and includes, in addition to a relatively axially thick main body part, at the sides of the "U", two outwardly directed arms when the piston is not in place within the fluid channel which it seals. When the arms of the piston are brought toward one another for insertion of the piston within the fluid channel, the piston material, which is resilient, urges the arms radially outward thereby forming a good seal with the inner and outer walls of the fluid channel.

Abstract: An improvement is provided in an apparatus for mounting and tensioning an inside diameter cutting blade which is mounted in a circular saw blade housing. The outer circumference of the blade is clamped within a mounting apparatus. Pressurized hydraulic fluid within a channel exerts pressure against the blade radially inward of the clamping means by exerting pressure on a fluid-tight gasket which, in turn, bears against the blade. By virtue of the uniform pressure distribution throughout the fluid, uniform tensioning of the blade is accomplished. The improvement comprises constructing the gasket in two pieces with an outer sleeve which contacts the hydraulic fluid, and which while deformable, is fixed relative to the housing, and a filler ring mounted within the sleeve and which is relatively movable with respect thereto.