Patent ID: 11933098
Assignee: PELLA CORPORATION
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 26:
27. A fenestration unit having an inner side and an outer side, the fenestration unit configured for installation in a rough opening in a structure defined by rough opening framing, the rough opening having an interior side and an exterior side and the rough opening framing having an interior face and an exterior face opposite the interior face, the fenestration unit comprising:
a frame having a perimeter; and
a retention system coupled to the frame and operable to exert a retention force on the rough opening framing to maintain positive engagement of the fenestration unit with the rough opening framing and resist extraction of the fenestration unit from the rough opening upon insertion of the fenestration unit in the rough opening such that the fenestration unit remains stationary in the rough opening without use of fasteners, wherein the retention system is adjustable to accommodate space between the rough opening framing and the frame,
wherein the retention system includes a retainer configured to permit insertion of the fenestration unit within the rough opening in a first direction at a first insertion force and resist extraction of the fenestration unit from the opening in a second direction at a second extraction force, and
wherein the retainer includes a base secured to the frame, a flex arm extending from the base, a stop extending from the flex arm, and an engagement feature extending from the flex arm, the retainer being operable such that during insertion of the frame in the first direction the flex arm bends in a first flex direction and upon movement of the frame in the second direction the flex arm bends in a second flex direction.