GB922415A - Improvements in or relating to fluid couplings - Google Patents

Abstract

922,415. Hydraulic couplings. AMERICAN RADIATOR & STANDARD SANITARY CORPORATION. Aug. 12, 1959 [Sept. 22, 1958], No. 27607/59. Class 69 (2). An hydraulic coupling comprises fluid passages 88 which are adjacent the inner periphery of the fluid circuit formed by the impeller and turbine members 18, 22 of the coupling and, when the speed of the turbine falls below a predetermined value, pass fluid from the circuit to a reservoir 70 outside the fluid circuit. In the embodiment shown in Fig. 1, a baffle 86 is secured to the turbine member 22 and consists of a ring or plurality of spaced segments which, when the coupling is operating at design load conditions, is out of the path 92 of the fluid. During overload conditions, the fluid moves in a path 94 and impinges against the baffle, the fluid then being defleeted to pass through the discharge passages 88 into the reservoir 70. The fluid in the reservoir is rotated at substantially the same speed as the coupling by vanes 80 and the amount of fluid in the coupling is controlled by a radially-adjustable scoop tube 82. End thrust between the impeller and turbine members may be taken-up by a thrust collar 34. The discharge passages may be inclined to the axis of the coupling, formed as bores in bolts securing the turbine member to the driven shaft, or be connected to the interior of the coupling by grooves in the baffle. In further embodiments, the passages are formed by radially-disposed tubes 335, Fig. 4. The impeller may be formed with a lip 327 which deflects the liquid into a chamber 325 connected to the reservoir by passages 331.