This invention involves an improved ball-type check valve for use in conditions such as oil and gas drilling which involve abrasive fluids, high pressures, and high temperatures. In this improved check valve, a one-piece ball retainer is provided which consists of (1) a retainer ring for the ball, (2) a base, and (3) at least two vertical supports which connect the retainer ring and the base. Peripheral channels are formed by (a) orifices which pass between the vertical supports, adjoined to (b) recessed areas in the base. This allows the interior passag...
In a ball-type check valve, a ball retainer consisting essentially of: (a) a base at one end, designed to securely mount said ball retainer inside a cylindrical conduit, wherein a channel is adapted to allow fluid to pass through the base, wherein said channel includes a central channel region and at least two peripheral channel regions formed by recessed areas in said base; (b) a retainer ring which forms a continuous circle at a second opposed end, wherein said retainer ring forms and encloses a central orifice through which fluid can pass if a ball is...
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