Anti-ligature handle and escutcheon for operating a lock

Patent metadata

Field	Value
Publication number	US-9714525-B2
Application number	US-201314402199-A
Country	US
Kind code	B2
Filing date	Jun 5, 2013
Priority date	Jun 5, 2012
Publication date	Jul 25, 2017
Grant date	Jul 25, 2017

Abstract

An anti-ligature handle and escutcheon for operating a lock. The handle and escutcheon are smoothly curved in all directions to eliminate hanging points and prevent suicide by preventing the attachment of a ligature to the handle or escutcheon. The handle is curved to allow fingers to be inserted behind the handle to pull on the handle. The handle is attached to a handle plate that slides behind an escutcheon plate portion of the escutcheon. Multiple ligature traps in the form of an inverted “V” are positioned in parallel offset rows between the handle plate and the escutcheon plate to prevent the insertion of a ligature around the handle and handle plate.

First claim

Thus, having described the invention, what is claimed is:

1. An anti-ligature handle and escutcheon mechanism mountable on a door for operating a lock mounted on the door, the anti-ligature handle and escutcheon mechanism comprising:
a handle rotatable between an open and a closed position, the handle being shaped as a lever handle with a smoothly curved outer surface to prevent the attachment of a ligature thereto, the handle rotating about a first end of the lever handle shape to operate the lock;
an escutcheon having an escutcheon plate oriented parallel to the door when the anti-ligature handle and escutcheon mechanism is mounted on the door; and
a handle plate oriented parallel to the door when the anti-ligature handle and escutcheon mechanism is mounted on the door, the handle being securely attached to the handle plate to prevent ligatures from being inserted between the handle and the handle plate, the handle plate moving with the handle and being exposed only above the handle as the handle is rotated toward the open position to operate the lock and the handle plate moving behind the escutcheon plate between the escutcheon plate and the door as the handle is rotated to the closed position.

2. The anti-ligature handle and escutcheon mechanism according to claim 1 further including an escutcheon liner attached to the escutcheon plate and positioned between the escutcheon plate and the handle plate.

3. The anti-ligature handle and escutcheon mechanism according to claim 2 wherein the escutcheon liner is formed of plastic and reduces friction between the escutcheon plate and the handle plate when the handle is rotated.

4. An anti-ligature handle and escutcheon mechanism mountable on a door for operating a lock mounted on the door, the anti-ligature handle and escutcheon mechanism comprising:
a handle rotatable between an open and a closed position, the handle being shaped as a lever handle with a smoothly curved outer surface to prevent the attachment of a ligature thereto, the handle rotating about a first end of the lever handle shape to operate the lock;
an escutcheon having an escutcheon plate oriented parallel to the door when the anti-ligature handle and escutcheon mechanism is mounted on the door;
a handle plate oriented parallel to the door when the anti-ligature handle and escutcheon mechanism is mounted on the door, the handle being securely attached to the handle plate to prevent ligatures from being inserted between the handle and the handle plate, the handle plate moving with the handle as the handle is rotated toward the open position to operate the lock and the handle plate moving behind the escutcheon plate between the escutcheon plate and the door as the handle is rotated to the closed position; and
an escutcheon liner attached to the escutcheon plate and positioned between the escutcheon plate and the handle plate, the escutcheon liner including

at least one ligature trap formed on a surface thereof between the escutcheon liner and the handle plate, the at least one ligature trap acting to prevent ligatures from being inserted between the escutcheon plate and the handle plate.

5. The anti-ligature handle and escutcheon mechanism according to claim 4 wherein the at least one ligature trap is formed as a dead end shape having an open end to receive a ligature and a closed end to prevent the passage of a ligature, the dead end shape being oriented on the escutcheon liner to direct ligatures inserted between the handle plate and the escutcheon plate into the open end of the dead end shape.

6. The anti-ligature handle and escutcheon mechanism according to claim 5 wherein the dead end shape is a “V” shape or a “U” shape.

7. The anti-ligature handle and escutcheon mechanism according to claim 5 further including a plurality of additional adjacent ligature traps, each additional ligature trap having a dead end shape with an open end to receive a ligature and a closed end to prevent the passage of a ligature.

8. The anti-ligature handle and escutcheon mechanism according to claim 7 wherein the plurality of additional adjacent dead end ligature traps are formed in at least two rows, the at least two rows including a first row having adjacent dead end ligature traps and a second row, offset from the first row, the second row oriented to position the open ends of the dead end shapes of the second row to receive ligatures extending between dead end ligature traps in the first row.

9. The anti-ligature handle and escutcheon mechanism according to claim 8 wherein the plurality of additional adjacent dead end ligature traps each have a “V” shape or a “U” shape.

10. The anti-ligature handle and escutcheon mechanism according to claim 9 wherein the plurality of additional adjacent dead end ligature traps are oriented with the open ends of the traps pointing approximately down when the anti-ligature handle and escutcheon mechanism is mounted on the door to prevent debris from accumulating in the ligature traps.

11. The anti-ligature handle and escutcheon mechanism according to claim 4 further including a plurality of additional adjacent ligature traps and wherein the additional ligature traps are formed as small ridges set in offset rows with a low height, the moving handle plate being in contact with and riding against the additional ligature traps.

12. The anti-ligature handle and escutcheon mechanism according to claim 1 wherein the anti-ligature handle is smoothly curved and shaped to allow a user to place fingers behind an upper edge of the handle and between the upper edge of the handle and the handle plate, but without providing an opening behind the handle.

13. The anti-ligature handle and escutcheon mechanism according to claim 1 wherein the escutcheon surrounds the handle.

14. The anti-ligature handle and escutcheon mechanism according to claim 13 wherein the escutcheon defines a recessed area and the handle pivots in the recessed area.

15. The anti-ligature handle and escutcheon mechanism according to claim 14 wherein the recessed area is approximately triangular in shape and includes an arcuate edge along at least one side of the approximately triangular recessed area.

16. The anti-ligature handle and escutcheon mechanism according to claim 14 wherein the recessed area is approximately triangular in shape, and the first end of the handle pivots near a first corner of the approximately triangular recessed area and a second end of the handle moves from near a second corner of the approximately triangular recessed area to near a third corner of the approximately triangular recessed area as the handle is rotated.

17. The anti-ligature handle and escutcheon mechanism according to claim 1 wherein the handle further includes a second end and the handle plate extends beyond the second end of the handle and passes underneath a portion of the escutcheon as the handle is rotated to operate the lock.

18. The anti-ligature handle and escutcheon mechanism according to claim 17 further comprising a handle liner attached to the handle plate, the handle liner including a guide, the escutcheon includes a guide track and the guide of the handle liner slides along the guide track of the escutcheon as the handle is rotated to operate the lock.

19. The anti-ligature handle and escutcheon mechanism according to claim 1 wherein the escutcheon is smoothly curved and provides no projections or hanging points.

20. The anti-ligature handle and escutcheon mechanism according to claim 2 further including a backing pla

Assignees

• Sargent Mfg Co

Inventors

• Eller Darren C
• Piantek Ryan
• Riley Dan
• Geraci Andrew

Classifications

• E05B5/00

  Handles completely let into the surface of the wing {(E05B85/10 takes precedence)} · CPC title

• Y10T292/57

  Operators with knobs or handles · CPC title

• E05B65/0032

  for hotel rooms (electronic G07C9/00904) · CPC title

• E05B1/003 Primary

  Handles pivoted about an axis perpendicular to the wing (E05B3/00, E05B5/00, E05B13/106 take precedence) · CPC title

• E05B1/00 Primary

  Knobs or handles for wings; Knobs, handles, or press buttons for locks or latches on wings (E05B5/00, E05B7/00 take precedence) · CPC title