Abstract:
A leaf spring for biasing the corner seal in a rotary engine has a shape that provides three-point contact with the seal and twopoint contact with the rotor on which it is mounted and also has a tang that engages a hole in a corner seal to prevent relative rotation therebetween.
Abstract:
An apparatus for injection molding dimensionally precise tubular elastomeric articles. The apparatus includes male and female mold members longitudinally movable relative to each other and adapted to form a tubular cavity therebetween, longitudinally and transversely disposed precision alignment surfaces, and means whereby an annular injection orifice is provided at one end of the cavity while the other end is provided with an annular vent opening and evacuation means. In the molding process, elastomeric material is injected into the cavity through the orifice until the mold cavity is filled. Thereafter, pressure is applied to the mold whereby the orifice and the annular vent opening are restricted and the material is subjected to a uniform pressure at all points within the mold cavity to produce a dimensionally precise elastomeric product.
Abstract:
A rotary face seal for the space between a stationary housing and a rotatable shaft extending therethrough uses a heat shrinkable polytetrafluoroethylene tube to form a secondary sealing boot that prevents leakage around a spring biased primary sealing face. The boot restrains relative rotation of the sealing face with respect to the shaft, damps out torsional vibration under high cyclic slip-stick conditions, resists embrittlement and cracking, protects the spring and the relatively axially sliding surfaces from deposit buildup, allows hydrostatic balancing of the pressures on the sealing face, and contains all rotating components in unitized assembly without supplemental stacking or locking tabs.