Abstract: A one-piece window insert fastener for releasably securing a window insert to a window sash having a generally rectangular shape with a plurality of openings about its periphery, the insert having a generally rectangular-shaped frame with a single pane structure fixed therein and having a plurality of bars each having a terminal end portion and each terminal end portion having a channel therein, the fastener being elongate and having a longitudinal axis, the fastener consisting of: a head portion adapted to engage the window sash and removably insertable into one of the openings in the window sash; a tail portion adapted to fixedly engage the window insert and removably insertable into one of the channels in the window insert; and a compression portion between the head portion and tail portion, the compression portion biasing the head portion against the window sash and allowing movement of the head portion toward the tail portion when the window insert is inserted in the window sash and moving the head porti

Abstract: A hub assembly (10) for use in arranging muntins (22) across a window pane includes at least first and second covers (12, 14) which are snap-fit and frictionally held together and which define at least one arcuate track (70) that is adapted to slidably receive carrier members (20) for interconnecting the muntins (22) to the hub assembly (10). The arcuate track (70) coacts with the carrier members (20) to retain the carrier members (20) in selective angular positions about the hub assembly (10). The hub assembly (10), which is semi-circular in plan view, can be selectively attached directly to a window frame, or to another similarly constructed hub assembly (10) to form a circular overall hub assembly.

Abstract: The present invention relates to a valve with a reciprocating piston between two oppositely-acting fluid balance chambers. The static and dynamic pressures of the fluid being dispensed creates a force in each balance chamber. However, these force vectors are of equal magnitude but opposite direction thereby resulting in no net force on the piston. This allows for the elimination of a spring compensating for fluid pressures on the piston. An internal flow passage is used within the piston so as to simplify the design and increase reliability.