[특허]Anti-ligative doorknob

Assa Abloy, Inc.

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특허 상세정보

MyON담기

내보내기 페이스북 공유 트위터 공유 카카오톡 공유

Anti-ligative doorknob

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	E05B-001/00 E05B-015/10 E05B-065/00 E05B-065/10
미국특허분류(USC)	292/347; 292/092; 292/DIG.65
출원번호	US-0269311 (2014-05-05)
등록번호	US-8991881 (2015-03-31)
발명자 / 주소	Shilts, Steven J.
출원인 / 주소	Assa Abloy, Inc.
대리인 / 주소	DeLio, Peterson & Curcio, LLC
인용정보	피인용 횟수 : 1 인용 특허 : 15

초록
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An anti-ligative ergonomic type door-knob primarily of the institutional type, essentially serving to defeat the effort of a temporarily mentally-depressed room occupant from succeeding in committing self-hanging via contrived ensnaring by which to secure a cord like hanging-noose. Generic-variant embodiments of my anti-ligative doorknob are set forth, including both a circular and semi-circular escutcheon-plate for I-shaped V-shaped Y-shaped X-shaped fin-levers, and also a non-finned hemispherical iteration. The novel critical minimum approximate 40-degree anti-ligative principle of my LIFESTAR™ doorknobs reliably prevents a person ensnaring any heretofore problematically hazardous to portion of the door-knob assembly, while my optionally cooperating door latchbolt is formed to a matching critical minimum approximate 40-degree anti-ligative tri-beveled latchbolt as well. Further suicide-deterrence is achieved by effectively submerging the doorknob into the door escutcheon-plate, thereby leaving virtually no declivity by which a suicidal-person can secure any manner of self-inflicted hanging-cord.

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1. An anti-ligative ergonomic doorknob system for a hinge-mounted door, said system comprising: a lever having a sloped outer surface and a rotary-shank connected to one end of the lever, the rotary shank configured to move a latchbolt between latched and unlatched positions;a backing plate extending from the lever;an escutcheon-plate on which the lever and backing plate are disposed; anda recess or groove forming a partial-circle in the escutcheon-plate and retaining an end of the lever or backing plate opposite the rotary shank as the lever rotates to prevent ensnarement of a cord under the lever or backing plate;the sloped outer surface of the lever configured to prevent frictional ensnarement of the cord when placed on or around the doorknob or in a configuration that uses an upper surface, side surface, or bottom surface of the door in conjunction with the doorknob. 2. The anti-ligative doorknob system of claim 1, wherein the fixed escutcheon-plate forms a partial circle of approximately 45-degrees to 180-degrees sector of a circle. 3. The anti-ligative doorknob system of claim 1, wherein the lever has a minimum 40-degree radial sloped outer surface as measured tangentially relative to a central axis of the rotary-shank. 4. The anti-ligative doorknob system of claim 1, further comprising: a retention-flange extending from the backing plate; and the recess or groove forming a guide in the escutcheon-plate serving to positively retain the retention-flange within said escutcheon-plate as the lever rotates. 5. The anti-ligative doorknob system of claim 1, the lever further including a dished surface area to enable a person having no hands to operate the doorknob system. 6. The anti-ligative doorknob system of claim 1, the lever further including a pivot-stop to limit rotation of the lever. 7. The anti-ligative doorknob system of claim 1, wherein the lever further includes a dished surface. 8. The anti-ligative doorknob system of claim 1, wherein the lever further includes a pivot-stop to limit rotation of the lever. 9. An anti-ligative ergonomic doorknob system for a hinge-mounted door, said system comprising: a lever having a rotary-shank connected to one end of the lever, the rotary shank configured to move a latchbolt between latched and unlatched positions, the lever having a distal end opposite the rotary-shank and a sloped outer surface between the rotary shank and the distal end;a backing plate extending from the lever between the rotary shank and the lever distal end, the backing plate having an edge forming a retention-flange distal from the rotary-shank; andan escutcheon-plate on which the lever and backing plate are disposed for rotation about the rotary shank, the escutcheon plate having an edge receiving the backing plate retention-flange to prevent ensnarement of a cord under the backing plate or lever;the sloped outer surface of the lever configured to prevent frictional ensnarement of the cord when placed on or around the doorknob or in a configuration that uses an upper surface, side surface, or bottom surface of the door in conjunction with the doorknob. 10. The anti-ligative doorknob system of claim 9, wherein the lever and backing plate rotate in an approximately 45-degrees to 90-degrees sector about the rotary shank. 11. The anti-ligative doorknob system of claim 9, wherein the lever has a minimum 40-degree radial sloped outer surface as measured tangentially relative to a central axis of the rotary-shank. 12. The anti-ligative doorknob system of claim 9, wherein the retention-flange is retained below the edge of the escutcheon-plate as the lever rotates. 13. An anti-ligative ergonomic doorknob system for a hinge-mounted door, said system comprising: a fixed escutcheon-plate having a surface and a recess or groove forming a partial-circle; anda lever having a rotary-shank connected to one end of the lever, the rotary shank configured to move a latchbolt between latched and unlatched positions, the lever being sufficiently close to the escutcheon-plate surface to prevent ensnarement of a cord under the lever and having another end opposite the rotary shank retained in the recess or groove in the escutcheon-plate during rotational movement of the lever about the rotary shank to prevent ensnarement of the cord under the lever, the lever further having a sloped outer surface configured to prevent frictional ensnarement of the cord when placed on or around the doorknob or in a configuration that uses an upper surface, side surface, or bottom surface of the door in conjunction with the doorknob. 14. The anti-ligative doorknob system of claim 13, wherein the fixed escutcheon-plate recess or groove forms a partial circle of less than a 90-degree sector of a circle. 15. The anti-ligative doorknob system of claim 13, wherein the lever has a minimum 40-degree radial sloped outer surface as measured tangentially relative to a central axis of the rotary-shank. 16. The anti-ligative doorknob system of claim 13, wherein the lever further includes a dished surface area. 17. The anti-ligative doorknob system of claim 13, wherein the lever further includes a pivot-stop to limit rotation of the lever. 18. An anti-ligative ergonomic doorknob system for a hinge-mounted door, said system comprising: a lever having a sloped outer surface and a rotary-shank connected to one end of the lever, the rotary shank configured to move a latchbolt between latched and unlatched positions;a backing plate extending from the lever;an escutcheon-plate on which the lever and backing plate are disposed; anda recess forming a partial-circle in the escutcheon-plate and retaining an end of the lever or backing plate opposite the rotary shank as the lever rotates to prevent ensnarement of a cord under the lever or backing plate;the sloped outer surface of the lever configured to prevent frictional ensnarement of the cord when placed on or around the doorknob or in a configuration that uses an upper surface, side surface, or bottom surface of the door in conjunction with the doorknob. 19. The anti-ligative doorknob system of claim 18, further comprising: a retention-flange extending from the backing plate; and the recess forminga guide in the escutcheon-plate serving to positively retain the retention-flange within said escutcheon-plate as the lever rotates. 20. An anti-ligative ergonomic doorknob system for a hinge-mounted door, said system comprising: a lever having a sloped outer surface and a rotary-shank connected to one end of the lever, the rotary shank configured to move a latchbolt between latched and unlatched positions;a backing plate extending from the lever;an escutcheon-plate on which the lever and backing plate are disposed; anda groove forming a partial-circle in the escutcheon-plate and retaining an end of the lever or backing plate opposite the rotary shank as the lever rotates to prevent ensnarement of a cord under the lever or backing plate;the sloped outer surface of the lever configured to prevent frictional ensnarement of the cord when placed on or around the doorknob or in a configuration that uses an upper surface, side surface, or bottom surface of the door in conjunction with the doorknob. 21. The anti-ligative doorknob system of claim 20, further comprising: a retention-flange extending from the backing plate; and the groove forminga guide in the escutcheon-plate serving to positively retain the retention-flange within said escutcheon-plate as the lever rotates. 22. An anti-ligative ergonomic doorknob system for a hinge-mounted door, said system comprising: a fixed escutcheon-plate having a surface and a recess forming a partial-circle; anda lever having a rotary-shank connected to one end of the lever, the rotary shank configured to move a latchbolt between latched and unlatched positions, the lever being sufficiently close to the escutcheon-plate surface to prevent ensnarement of a cord under the lever and having another end opposite the rotary shank retained in the recess in the escutcheon-plate during rotational movement of the lever about the rotary shank to prevent ensnarement of the cord under the lever, the lever further having a sloped outer surface configured to prevent frictional ensnarement of the cord when placed on or around the doorknob or in a configuration that uses an upper surface, side surface, or bottom surface of the door in conjunction with the doorknob. 23. An anti-ligative ergonomic doorknob system for a hinge-mounted door, said system comprising: a fixed escutcheon-plate having a surface and a groove forming a partial-circle; anda lever having a rotary-shank connected to one end of the lever, the rotary shank configured to move a latchbolt between latched and unlatched positions, the lever being sufficiently close to the escutcheon-plate surface to prevent ensnarement of a cord under the lever and having another end opposite the rotary shank retained in the groove in the escutcheon-plate during rotational movement of the lever about the rotary shank to prevent ensnarement of the cord under the lever, the lever further having a sloped outer surface configured to prevent frictional ensnarement of the cord when placed on or around the doorknob or in a configuration that uses an upper surface, side surface, or bottom surface of the door in conjunction with the doorknob.

이 특허에 인용된 특허 (15)

이 특허를 인용한 특허 (1)

Riley, Daniel; Griswold, Lee; Palmieri, Eric; Fowler, Tracy, Anti-ligature escutcheon.

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Anti-ligative doorknob

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이 특허에 인용된 특허 (15)

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