Abstract: A quick connect fluid coupling having a male member and a female member with radially resilient latch fingers for engaging the male coupling member. A locking sleeve having a continuous ring portion and a plurality of circumferentially spaced radially resilient fingers is movable from a position in which the ring portion surrounds the fingers on the female member to radially confine the same, and a release position in which the ring portion is spaced axially from the free ends of the fingers on the female member. Latch means are provided for releasably latching the locking sleeve in its locking position and in its release position.

Abstract: A power operated chair lift mechanism including long links pivotally connected at one end to a horizontally movable follower block and pivotally connected at the other end to a vertically movable chair support, and short links pivotally connected at one end intermediate the ends of the long links and at the other end to the base to form an isosceles linkage for raising and lowering the chair in response to horizontal movement of the follower block. Auxiliary links are connected to a second follower block and to vertical guideways in the chair support and are pivotally connected intermediate their ends to the short links to provide a second isosceles linkage for maintaining the chair support in a fixed attitude during raising and lowering of the chair. The chair can be rotated about an upright axis in all vertically adjusted positions.

Abstract: A screw includes a metal portion having a threaded shank adapted to be threaded into a workpiece, a head and an annular flange between the head and the shank. The surface of the metal head and the upper surface of the metal flange are irregular so that, when a plastic portion is molded around the head and flange of the metal portion, the metal and plastic portions are relatively fixed to each other. The plastic portion includes a thin skirt which extends around the periphery of the flange and further includes a thin radially extending section which mates with an annular rib extending around the periphery of the underside of the flange to reduce the possibility of failure of the plastic portion as that portion is forced against a workpiece. The section of the plastic portion extending radially under the flange is formed with depending rings which deform and form a seal as the fastener is threaded down to bring the radially extending section toward engagement with the workpiece.

Abstract: A fastener assembly for use in securing one member to another includes a bolt and a washer telescoped onto the bolt. The washer is formed with a central protruding section and an integral annular flange extending radially outward from the base of the protruding section. A frustoconical recess formed within the underside of the washer is smaller in diameter than the diameter of the protruding section. Mating ratchet teeth formed on the underside of the bolt head and the protruding section interfit so as to enable the bolt to be turned relative to the washer during tightening while keeping the bolt from turning in a loosening direction once the bolt is tightened down. To keep the washer from turning relative to the members secured together by the bolt, angularly spaced sets of two locking teeth are formed within the flange and extend axially therefrom to embed in the upper surface of the top member.