IP Library Granted Patent US 12662869
Granted Patent B2
US 12662869 · App. 17/984,174 · Granted Jun 23, 2026

Mull system for windows and doors

Inventor: Brandon R. Snyder (Lykens, PA)
Assignee: MI Windows and Doors, LLC
E06B1/524E06B1/366E06B7/16E06B1/6007
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Quick Facts
Patent No.
US 12662869
App. No.
17/984,174
Filed
Nov 9, 2022
Granted
Jun 23, 2026
Kind
B2
Art Unit
3635
USPC
52/210
Abstract

A system for mulling a plurality a first fenestration frame and a second fenestration frame including a primary mull connector that is sliding received between the first and second fenestration frames. The primary mull connector having a first end with a jamb engagement portion and a second end that is free of a jamb engagement portion.

Claims (35)

1 . A system for mulling a first fenestration frame and a second

fenestration frame together, the system comprising:

a first fenestration frame having a first jamb and a second jamb;

a second fenestration frame having a having a first jamb and a second jamb;

a primary mull connector being formed as a unitary one piece member slidingly received between the first fenestration frame and the second fenestration frame in a direction from a first side of the first fenestration frame and the second fenestration frame toward a second side of the first fenestration frame and the second fenestration frame, the primary mull connector having a sole jamb connector portion on a first end of the primary mull connector, the sole jamb connector portion fitting into a first portion of the second jamb of the first fenestration frame on the first side of the first fenestration frame and a first portion of the first jamb of the second fenestration frame on the first side of the second fenestration frame,

wherein the primary mull connector has a second end with a bottommost surface having no jamb engagement portion configured to prevent movement of the first side of the second jamb of the first fenestration frame in a perpendicular direction away from the first side of the first jamb of the second fenestration frame, the primary mull connector extending substantially an entire distance between the first side and the second side of the first fenestration frame and the second fenestration frame, the primary mull connector being free of any jamb connector portions between the first end of the primary mull connector and the second end of the primary mull connector; and

a secondary mull connector secured to the second end of the primary mull connector with a screw and being fit into the second jamb of the first fenestration frame on the second side of the first fenestration frame and the first jamb of the second fenestration frame on the second side of the second fenestration frame, preventing movement of the second end of the second jamb of the first fenestration frame in a perpendicular direction away from the second side of the second jamb of the first fenestration frame,

wherein the primary mull connector is secured to the first fenestration frame and the second fenestration frame free of any fasteners extending through the primary mull connector and the first fenestration frame and the second fenestration frame,

wherein the second jamb of the first fenestration frame faces the first jamb of the second fenestration frame, the primary mull connector including a first groove and a second groove intermediate the first end of the primary mull connector and the second end of the primary mull connector, a first weather stripping having a first side within the first groove and a second weather stripping having a first side with the second groove, wherein the first weather stripping is compressed by a first flat raised portion of the first fenestration frame, and wherein the second weather strip is compressed by a second flat raised portion of the second fenestration frame.

2 . The system of claim 1 , further including first end cover configured to fit onto the first end of the primary mull connector.

3 . The system of claim 1 , further including a second end cover configured to fit onto the secondary mull connector.

4 . The system of claim 1 , wherein the secondary mull connector includes a planar portion positioned adjacent to a planar portion of the second end of the primary mull connector and raised portions extending away from the second end of the primary mull connector.

5 . The system of claim 1 , wherein a first weather stripping coupled to the primary mull connector includes a first sealing portion contacting the second jamb of the first fenestration frame and a second weather stripping coupled to the primary mull connector includes a second sealing portion contacting the first jamb of the second fenestration frame.

6 . The system of claim 5 , wherein the second jamb of the first fenestration frame includes a first raised portion intermediate the first side of the first fenestration frame and the second side of the first fenestration frame, and wherein the first jamb of the second fenestration frame includes a second raised portion intermediate the first side of the second fenestration frame and the second side of the second fenestration frame; wherein the first sealing portion of the first weather stripping contacts the first raised portion of the second jamb of the first fenestration frame and the second sealing portion of the second weather stripping contacts the second raised portion of the first jamb of the second fenestration frame.

7 . The system of claim 6 , wherein the second end of the primary mull connector has a planar surface with protrusions adjacent to the second jamb of the first fenestration frame and to the first jamb of the second fenestration frame.

8 . The system of claim 1 , wherein the second end of the primary mull connector is planar.

9 . The system of claim 1 , wherein the second jamb of the first fenestration frame and the first jamb of the second fenestration frame includes substantially planer surfaces facing each other.

10 . The system of claim 1 , further including a sealant sealing an exterior portion of the primary mull connector with second jamb of the first fenestration frame and with the first jamb of the second fenestration frame.

11 . The system of claim 1 , wherein the jamb connector portion includes a first member received with in a first groove in the second jamb of the first fenestration frame and a second member received within a second groove in the first jamb of the second fenestration frame, a cover operatively connected to the first end of the primary mull connector includes a first leg being positioned in the first groove and a second leg being positioned with in the second groove in the first jamb of the second fenestration frame.

12 . A method for mulling a plurality of fenestration frames, the method comprising:

providing a first fenestration frame and a second fenestration frame, each of the first fenestration frame and the second fenestration frame having a respective first jamb and a second jamb, the second jamb of the first fenestration frame facing the first jamb of the second fenestration frame;

sliding a unitary one piece primary mull connector between the second jamb of the first fenestration frame and the first jamb of the second fenestration frame in a direction from a first side of the first fenestration frame and the second fenestration frame toward a second side of the first fenestration frame and the second fenestration frame, the primary mull connector having a sole jamb connector portion fitting into a first portion of the second jamb of the first fenestration frame on the first side of the first fenestration frame and a first portion of the first jamb of the second fenestration frame on the first side of the second fenestration frame,

wherein the primary mull connector has a first end with the jamb connector portion and a second end having a bottommost portion with no jamb connector portion, the primary mull connector being free of any jamb connector portions between the first end of the primary mull connector and the second end of the primary mull connector;

wherein prior to sliding the primary mull connector between the first fenestration assembly frame and the second fenestration frame, the second jamb of the first fenestration frame and the first jamb of the second fenestration frame are separated by a first minimum distance that is less than a second distance defined as a maximum width of the sole jamb connector portion,

providing a first weather stripping coupled to the primary mull connector and including a sealing portion; and

providing a second weather stripping coupled to the primary mull connector and including a sealing portion,

wherein, when the primary mull connector is slid between the second jamb of the first fenestration frame and the first jamb of the second fenestration frame, the sealing portion of the first weather stripping contacts the second jamb of the first fenestration frame and the sealing portion of the second weather stripping contacts the first jamb of the second fenestration frame, wherein the first weather stripping is compressed by a first flat raised portion of the first fenestration frame, and wherein the second weather strip is compressed by a second flat raised portion of the second fenestration frame.

13 . The method of claim 12 , further comprising fitting a first end cover onto the first end of the primary mull connector.

14 . The method of claim 12 , further comprising:

securing a secondary mull connector to the second end of the primary mull connector and being fit into the second jamb of the first fenestration frame on the second side of the first fenestration frame and the first jamb of the second fenestration frame on the second side of the second fenestration frame.

15 . The method of claim 14 , wherein the secondary mull connector is secured to the primary mull connector with a fastener extending through the secondary mull connector and the second end of the primary mull connector, wherein a portion of the secondary mull connector is adjacent the second end of the primary mull connector and free of any material therebetween.

16 . The method of claim 14 , wherein the secondary mull connector is snap fitted to the second jamb of the first fenestration frame and the first jamb of the second fenestration frame.

17 . The method of claim 14 , further comprising fitting a second end cover onto the secondary mull connector.

18 . The method of claim 12 , further comprising:

applying a sealant sealing an exterior portion of the primary mull connector with second jamb of the first fenestration frame and with the first jamb of the second fenestration frame.