# US 9,518,421 B2 · Safety door barricade

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 9,518,421 B2
- Document ID: US9518421B2
- Status: Granted
- Kind: B2
- Application number: 14/107,339
- Filed: 2013-12-16
- Published: 2014-10-23
- Granted: 2016-12-13
- Earliest claimed: 2013-04-22
- Assignees: National School Control Systems, LLC
- Applicants: National School Control Systems, LLC
- Inventors: William W. Cushwa, Jr.; David A. Soulsby
- Web page: https://patentgrep.com/patent/US9518421B2

## CPC

- E06B 5/10: for protection against air-raid or other war-like action; for other protective purposes
- E05C 19/182: {insertable in the gap between the wing and the frame or in the gap between a lock and its striker, e.g. for cooperation with the striker}
- E05C 19/184: {a portable member cooperating with a fixed member or an opening on the wing or the frame, for locking the wing}
- E06B 9/02: Shutters, movable grilles, or other safety closing devices, e.g. against burglary (louvre windows or grilles E06B7/08; lamellar blinds E06B9/26)
- Y10T 292/68: Keepers
- E06B: FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES (shades or blinds for greenhouses A01G9/22; curtains A47H; lids for car boots or bonnets B62D25/10; skylights E04B7/18; sunshades, awnings E04F10/00)
- E05C: BOLTS OR FASTENING DEVICES FOR WINGS, SPECIALLY FOR DOORS OR WINDOWS (latching means for sideboard or tailgate structures for vehicles B62D, {B62D33/02}; fastening devices for constructional or engineering elements E04, F16B; locks, fastening devices structurally or operatively combined or having significant cooperation with locks E05B; means for operating or controlling wing fasteners in conjunction with mechanisms for moving the wing E05F)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A door barricade includes a base member and a securing mechanism. The base member has a size that permits it to be positioned under a door, with a first upwardly extending portion positioned on the base member and a second upwardly extending portion positioned on the base member. The first and second upwardly extending portions are spaced a distance from one another that is greater than or equal to a width of a door. The securing mechanism is coupled to the base member for mating with a floor. The base member and the securing member together serve to barricade a door such that the door will not move even upon the application of significant force when the securing mechanism is fixedly coupled to a floor.

## Claims

### Claim 1

A method for securing a door in a closed position during an emergency situation with a barricade, the barricade including a base member having a base portion for coupling to the door that includes a protruding portion extending from the base portion, wherein the protruding portion deters movement of the door from the closed position to an open position, and a securing mechanism for fixedly coupling the base member to a non-door surface when the door is in the closed position, said method comprising:
sliding the base member under the door when the door is in the open position such that the protruding portion of the base member abuts the door;
closing the door;
sliding the base member along the bottom of the door when the door is in the closed position until it abuts a stop that is positioned on the door in the vicinity of the bottom of the door; and
pressing the securing mechanism through an opening in the base member until the securing mechanism enters an opening in the non-door surface.

### Claim 2 (depends on 1)

The method of claim 1, wherein the non-door surface is a floor, and wherein the pressing step includes pressing the securing mechanism into and through the opening in the base member into the opening in the floor.