Patent ID: 8484913

Claim:
A jamb and frame combination for window or door casings, comprising an elongated jamb member formed to fit snugly against the interior surface of a window or door casing, and having a tongue portion on each opposite side extending the length thereof; a first frame member formed to fit snugly against a respective inner or outer surface of said window or door casing, wherein said first frame member includes a groove portion extending the length thereof on one distal end that is snugly receives and mates with a respective tongue portion of said jamb member, and includes a tongue portion extending the lengths thereof on an opposite distal end that snugly receives and mates with a respective grooves of a trim member, and at least one removable fastener passing through said respective frame member in an area adjacent to each said tongue portion and passing into said window or door casing to thereby hold said first frame member snugly thereto; an elongated first trim member including a groove portion extending the length thereof and interlocking with said tongue portion of said first frame member, such that when said first frame members is installed upon a window or door casing, said first trim member groove portion is pushed upon said first frame member tongue portion and frictionally held in place and covering said at least one removable fastener; a second frame member formed to fit snugly against an opposite inner or outer surface of said window or door casing, wherein said second frame member includes a groove portion extending the length thereof on one distal end that snugly receives and mates with the opposite respective tongue portion of said jamb member, and includes a second groove portion extending the length thereof on an outside surface, and at least one removable fastener passing through said second frame member at a point that is within said second groove portion and passing into said window or door casing to thereby hold said second frame member snugly thereto; and an elongated second trim member snugly fitting within and covering said second groove portion and said at least one removable fastener; wherein said first frame member, said second frame member, and said jamb member together form a shape having a cross-section that includes an interior portion that flares in a direction along the widths of said first and second frame members, such that said first and second frame members can connect with a portion of said window or door casing without contacting the distal edge portions of said window or door casing.