Mechanism for a reclining chair or sofa module

• US 4,740,031 A
• Filed: 09/05/1986
• Issued: 04/26/1988
• Est. Priority Date: 09/05/1986
• Status: Expired due to Term

• Current Assignee: Parma Corporation (Melvyn John Bridges, PhD)
• Original Assignee: Parma Corporation (Melvyn John Bridges, PhD)
• Inventors: Rogers, Walter C. Jr.
• Primary Examiner(s): NOT, DEFINED
• Application Number:
  US06/904,242
• Time in Patent Office: 599 Days
• Field of Search: 297/85, 297/84, 297/83, 297/322, 297/316
• US Class Current: 297/85.00L
• CPC Class Codes: A47C 1/0345 characterised by foot-rests actuated by lazy-tongs

Abstract

An improved mechanism for a reclining chair or sofa module allows the backrest to be placed virtually against a nearby wall in a room without offering any obstruction when the chair is placed into reclining position. The mechanism may incorporate a backrest of an average of conventional length and, in the preferred embodiment, the mechanism is driven to TV position by the weight of the chair occupant upon release of a locking means which holds the mechanism in the normal or closed position. Preferably, a manually-operable handle positioned on one side of the chair in accordance with conventional practice, is utilized to release the lock mechanism. Once in TV position, the chair may be moved to advanced reclining positions by the occupant exerting pressure on the backrest during which time the backrest will not strike the adjacent wall.

Claims

1. A reclining seating unit comprising in combination, a base, a seat, a backrest, a linkage system mounting the seat and backrest relative to the base and including front and rear seat mounting links pivotally mounted on the base at locations spaced along a forward-rearward direction of the seating unit, front and rear suspension links pivotally mounted to the seat and pivotally connected to the front and rear seat mounting links respectively, a footrest, a footrest linkage mounting the footrest relative to the seat for movement between a retracted position adjacent the seat and an extended position projected forwardly from the seat, said footrest linkage including a footrest mounting link pivotally mounted to the seat and including a crank portion offset beyond the pivotal connection of the footrest mounting link to the seat, footrest actuating linkage including a drive crank pivotally mounted to the seat, and a connecting link interconnecting the drive crank and the crank portion of the footrest mounting link such that when the drive crank is driven in one rotative direction, the footrest mounting link will be driven in an opposite relative direction to extend the footrest linkage, and wherein the drive crank when driven exerts a pulling force on the connecting link to drive said crank portion of the footrest mounting link.

2. The seating unit defined in claim 1 wherein said footrest actuating linkage includes a draw bar link pivotally connected to the drive crank below the pivotal connection of the drive crank to the seat for actuating the drive crank.

3. The seating unit defined in claim 2 wherein said draw bar link is pivotally connected to the front seat mounting link to be driven thereby.

4. The seating unit defined in claim 3 further including a control link interconnecting said front and rear suspension links, and wherein said rear suspension link is pivotally connected to said seat at a location below the pivotal connection of said control link to said rear suspension link.

5. The seating unit defined in claim 1 further including a control link interconnecting said front and rear suspension links, and wherein said rear suspension link is pivotally connected to said seat at a location below the pivotal connection of said control link to said rear suspension link.

6. The footrest defined in claim 1 further including backrest linkage including a first backrest link fixed to the backrest and pivotally mounted to the seat, a second backrest link pivotally connected to the first backrest link and the rear suspension link and wherein once the footrest is in extended position, the front and rear suspension links are movable in opposite rotative directions to move the backrest relative to the seat and the seat relative to the base.

7. The seating unit defined in claim 4 further including backrest linkage including a first backrest link fixed to the backrest and pivotally mounted to the seat, a second backrest link pivotally connected to the first backrest link and the rear suspension link and wherein once the footrest is in extended position, the front and rear suspension links are movable in opposite rotative directions to move the backrest relative to the seat and the seat relative to the base.

8. The seating unit defined in claim 6 including stop means on said rear suspension link and said second backrest link for preventing movement of the backrest relative to the seat unless the footrest is in extended position.

9. The seating unit defined in claim 7 including stop means on said rear suspension link and said second backrest link for preventing movement of the backrest relative to the seat unless the footrest is in extended position.

10. A linkage mechanism for use in a reclining seating unit having a seat and a backrest, the mechanism comprising in combination a base link, front and rear seat mounting links pivotally mounted to the base link at locations spaced along the base link, a seat link adapted to be fixed along a seat, front and rear suspension links pivotally mounted to the seat link at spaced locations along the seat link, the front and rear suspension links being pivotally connected to upper portions of the front and rear seat mounting links respectively, the seat link having a depending portion projecting downwardly at a rear portion thereof to a region adjacent the base link, said rear suspension link being pivotally mounted to said depending portion of said seat link, a control link pivotally connected at one end portion thereof to an intermediate portion of the front suspension link at a location below the pivotal connection of the front suspension link to the seat link, said control link being connected at an opposite end portion thereof to said rear suspension link above the pivotal connection of the rear suspension link to said depending portion of said seat link and below the pivotal connection of the rear suspension link to the rear seat mounting link, a first backrest link adapted to be fixed to a backrest and being pivotally mounted to the seat link at a rear portion thereof, a second backrest link having one end portion pivotally connected to the first backrest link and having an opposite end portion pivotally connected to a lower portion of said rear suspension link, a footrest linkage pivotally mounted to said seat link forwardly of the pivotal connection of said front suspension link to said seat link for movement between extended and retracted positions, drive means for driving said footrest linkage between extended and retracted positions, stop means for preventing relative movement between said backrest links, said suspension links and the seat link when the footrest linkage is in retracted position and during movement of said footrest to extended position, said backrest links being movable relative to the seat link once said footrest linkage is in extended position to drive the rear suspension link in one rotative direction causing the control link to move rearwardly to drive the front suspension link in a second rotative direction opposite said first rotative direction.

11. The linkage mechanism defined in claim 10 wherein said footrest linkage includes a mounting link pivotally mounted to the seat link and having a crank portion extending beyond the pivotal mounting of said footrest mounting link to the seat link and wherein said drive means for driving said footrest linkage includes a drive crank pivotally mounted to the seat link, a connecting link pivotally connected to the drive crank below the pivotal mounting of the drive crank to the seat link, said connecting link being pivotally connected to said crank portion of said footrest mounting link, and means for rotating said drive crank in one direction to drive said footrest mounting link in an opposite rotative direction to extend the footrest linkage through means of said connecting link, said drive crank exerting a pulling force on said connecting link when said drive crank is rotated in said one rotative direction thereof.

12. The linkage mechanism defined in claim 11 wherein sid means for rotating said drive crank includes a draw bar link pivotally connected to said drive crank below the pivotal mounting of said drive crank to said seat link.

13. The linkage mechanism defined in claim 12 wherein said means for rotating said drive crank further ncludes said front seat mounting link, said draw bar link being pivotally connected to an intermediate portion of said front seat mounting link.

14. A mechanism for a reclining seating unit having a seat and a backrest, the mechanism including in combination;

a base link, front and rear seat mounting links pivotally mounted to the base link at spaced locations along the latter, a seat link located above the base link and extending in the same general directin thereof, front and rear suspension links pivotally mounted to said seat link at spaced locations along the seat link while also being pivotally connected to said front and rear seat mounting links to suspend the seat link from said front and rear seat mounting links, a footrest linkage pivotally mounted to the seat link for movement between extended and retracted positions and including a footrest mounting link pivotally mounted to the seat link and having a crank portion extending beyond the pivotal mounting of the footrest mounting link to the seat link, drive means for driving said footrest mounting link to extend and retract the footrest linkage, said drive means including a drive crank pivotally mounted to the seat link, a connecting link pivotally connected to the crank portion of said footrest mounting link and pivotally connected to the drive crank below the pivotal mounting of the drive crank to the seat link for rotating the footrest mounting link in one direction when the drive crank is rotated in an opposite rotative direction to exert a pulling force on the connecting link and means for rotating said drive crank to extend the footrest linkage.

15. The linkage mechanism defined in claim 14 wherein said means for rotating said drive crank includes a draw bar link connected at one end portion to the drive crank at a location below the pivotal mounting of the drive crank to the seat link, said draw bar link being connected at an opposite end to the front seat mounting link to be driven thereby.

16. A linkage mechanism for use in a reclining seating unit having a seat and a backrest, the mechanism comprising in combination a base link, front and rear seat mounting links pivotally mounted to the base link at locations spaced along the base link, a seat link adapted to be fixed along a seat, front and rear suspension links pivotally mounted to the seat link at spaced locations along the seat link, the front and rear suspension links being pivotally connected to the front and rear seat mounting links respectively, the seat link having a depending portion projecting downwardly at a rear portion thereof to a region adjacent the base link, said rear suspension link being pivotally mounted to said depending portion of said seat link, a control link pivotally connected at one end portion thereof to an intermediate portion of the front suspension link at a location below the pivotal connection of the front suspension link to the seat link, said control link being connected to an opposite end portion thereof to said rear suspension link above the pivotal connection of the rear suspension link to said depending portion of said seat link and below the pivotal connection of the rear suspension link to the rear seat mounting link, a first backrest link adapted to be fixed to a backrest and being pivotally mounted to the seat link, a second backrest link having one end portion pivotally connected to the first backrest link and having an opposite end portion pivotally connected to said rar suspension link, a footrest linkage pivotally mounted to said seat link for movement between extended and retracted positions, drive means for driving said footrest linkage between extended and retracted positions, means for preventing relative movement between said backrest links, said suspension links and the seat link when the footrest linkage is in retracted position and during movement of said footrest to extended position, said backrest links being movable relative to the seat link once said footrest linkage is in extended position to drive the rear suspension link in one rotative direction causing the control link to move rearwardly to drive the front suspension link in a second rotative direction opposite said first rotative direction.