Abstract: A liftarm assembly having: i) a mounting socket and base assembly for attachment to a support; ii) a vertically extending mounting tube non-rotatably but pivotably secured to the mounting socket and base assembly; iii) a sheave mounted in the mounting tube for rotation about a horizontal axis wherein the sheave projects laterally out of the mounting tube; iv) a tubular metal liftarm mounting in the mounted tube for rotation about a vertical axis wherein the tubular liftarm is devoid of internal pulleys and external braces and other protuberances; v) the tubular liftarm including a lower vertically extending linear portion for insertion into the mounting tube, a laterally extending cantilevered upper portion, and an intermediate portion joined to the upper and lower portions by smooth curves; vi) a fitting coupled to the outboard end of the cantilevered upper portion and including a sheave journaled for rotation about a horizontal axis; vii) a load line having its outboard free end secured to the cantilevered

Abstract: A fluid coupling has a male member having a generally rigid base and an attached, relatively resilient face with a first fluid flow path opening from the resilient face. A female member of the coupling has a generally cylindrical receptacle with an opening for admitting the male member and a second fluid flow path for communication with the first fluid flow path in the male member when the male member is inserted into and rotated in the receptacle. The male and female members have cooperating cam surfaces opposite the opening into the fluid flow path in the member for urging the members together with a force directed at the opening. The force compresses the resilient face of the male member against the receptacle to seal the fluid flow paths about the openings. The preferred embodiment is a T coupling in which the male member has a third fluid flow path extending through it and in communication with the first fluid flow path.