Patent attributes
A fenestration unit including a first panel having a leading portion and a trailing portion, a second panel, and a frame including a first lateral member and a second lateral member. The first lateral member has a trolley space configured to slideably receive a trolley assembly. The trolley assembly includes a first trolley coupled to the leading portion of the first panel and a second trolley coupled to the trailing portion of the first panel. Each of the first and the second trolleys includes a guide pin slideably received in the leading and trailing tracks, respectively. The guide pins are configured to guide the first panel out of a coplanar relationship with the second panel when the first panel is slid to an opened position and guide the first panel into a coplanar relationship with the second panel when the first panel is slid to a closed position.
