US3492045A - Lever adjusting mechanism for reclining chairs - Google Patents

Lever adjusting mechanism for reclining chairs Download PDF

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Publication number
US3492045A
US3492045A US731581A US3492045DA US3492045A US 3492045 A US3492045 A US 3492045A US 731581 A US731581 A US 731581A US 3492045D A US3492045D A US 3492045DA US 3492045 A US3492045 A US 3492045A
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United States
Prior art keywords
lever
chair
footrest
seat
arm
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US731581A
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English (en)
Inventor
Alois Schefthaler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Himolla Polstermobelwerk GmbH
Original Assignee
Himolla Polstermobelwerk GmbH
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Filing date
Publication date
Application filed by Himolla Polstermobelwerk GmbH filed Critical Himolla Polstermobelwerk GmbH
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Publication of US3492045A publication Critical patent/US3492045A/en
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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/034—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts including a leg-rest or foot-rest
    • A47C1/035—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts including a leg-rest or foot-rest in combination with movably coupled seat and back-rest, i.e. the seat and back-rest being movably coupled in such a way that the extension mechanism of the foot-rest is actuated at least by the relative movements of seat and backrest
    • A47C1/0355—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts including a leg-rest or foot-rest in combination with movably coupled seat and back-rest, i.e. the seat and back-rest being movably coupled in such a way that the extension mechanism of the foot-rest is actuated at least by the relative movements of seat and backrest actuated by linkages, e.g. lazy-tongs mechanisms

Definitions

  • a tension spring returns the chair from the prone to the reclining position when pressure is removed from the back rest.
  • This invention relates to a lever adjusting mechanism for a reclining chair with a retractable footrest.
  • the activating lever for the footrest support is a two-arm lever, one of whose arms engages the footrest support While the other arm is connected with a lever that is pivoted on the seat.
  • a lever adjusting mechanism of the prior art is disclosed in German Patent No. 1,939,254.
  • the lever adjusting mechanism described therein serves exclusively for the adjustment of the chair from the sitting to the reclining position, with the footrest extended.
  • the seat angle which is formed by the seat and the back rest, remains unchanged.
  • the back rest can be tipped toward the rear, by hand, with the help of a special motion, this type of adjustment to the reclining position is difficult when the user is in a sitting position.
  • the activating lever for the footrest sup-port is a two-arm pivoted lever arranged in a swing fashion on the frame. Another connecting lever engages the pivot point of the activating lever on the footrest support. The free end of this other connecting lever runs along the frame and is connected with the lower arm of the two-arm lever by a tension spring. Because the activating lever for the footrest support is pivoted on the two-arm swing lever, the pivot point of the activating lever can be moved upward, although only during the adjustment from the reclining position to the prone position. During the change from the sitting position to the reclining position, the two-arm swing lever is not moved.
  • the pivot point is fixed and the activating lever through its swinging motion prevents the seat and thus also the center of gravity of the chair from moved too far to the rear so that the chair is prevented from tipping over backward. If a pressure is exerted on the back rest during the reclining position, the back rest will move to the rear and will pull the seat and a traction lever along with it.
  • the traction lever causes the two arm swing lever to be swung around so 3,492,045 Patented Jan. 27, 1970 "Ice that the activating lever and, along with it, the footrest and the front part of the seat, are further raised, while the ang e between the seat and the back rest is increased.
  • the connecting lever is moved to the rear in a guide slot while the lower arm of the swing lever swings forward, so that the tension spring between the two of them is so considerably extended that its force will return the chair to the reclining position when the load on the back rest is relieved.
  • the pivot point of the lever on the footrest support is above the connecting line between the rear pivot point of the footrest support on the seat and a guide pin for the lever on the frame.
  • the pivot point is thus above the dead-center line and, according to the invention, is kept in this position by a spring which connects the connecting lever with the seat so that the footrest cannot fold out or snap out by itself.
  • the tension spring between the connecting lever and the swing lever is easily extended in the sitting position and the spring force serves as an auxiliary force to extend the footrest, that i to say, when the chair is adjusted from the sitting to the reclining position.
  • the lever adjusting mechanism of this invention makes it possible to adjust the chair from the reclining position to the prone position through simple pressure against the back rest.
  • the footrest cannot snap out unintentionally when in the sitting position, and the chair can be easily adjusted through the auxiliary spring forces.
  • FIGURE 1 shows a lever adjusting mechanism for a reclining chair with the chair in the sitting position
  • FIGURE 2 shows the chair in the reclining position
  • FIGURE 3 shows the chair in the prone position.
  • a chair frame 1 connects the two arm rests 2 with each other and, via the lever adjusting mechanism of this invention, carries seat 3 and back rest 4 of the chair.
  • An angled mounting frame 5 for the lever adjusting .mechanism is attached to chair frame 1 by bolts, screws or the like.
  • the seat 3 is carried by mounting brackets 6 and 7, and the footrest support is also pivotally attached to mounting bracket 7.
  • the back rest is attached to mounting bracket 8 which is pivotally connected to both the mounting frame 5 and the seat mounting bracket 6.
  • Footrest support arms 10 and 11 are pivoted to the front seat mounting bracket 7, and are also pivoted to footrest support arms 12 and 13 in the manner of a pair of scissors.
  • a footrest support bracket 14 serves to fasten the footrest 15.
  • the rear footrest support arm 11 is pivoted at point 33 on the front seat mounting bracket 7 and is designed as a bent, two-arm lever. At the bend of the rear footrest support arm 11 is pivot point 16 for the activating lever 17.
  • This activating lever 17 is designed as a straight, two-arm lever, which is pivoted at point 18 to another two-arm lever 19, which is in turn pivoted on mounting frame 5 at point 35 (FIGURE 3).
  • a lever 20 is pivoted which serves as a push-pull rod and whose rear end is pivotally attached to the lower end of seat mounting bracket '6.
  • a bent connecting arm 21 is pivoted on one end at point 16 on the rear footrest support arm 11.
  • connecting arm 21 is slideably attached to mounting frame 5 by a slot 22 and pin 23 arrangement.
  • the free end of connecting lever 21 is also connected with the lower arm of the two-arm lever 19 by means of a tension spring 24.
  • Another tension spring 25 is arranged between the free end of connecting arm 21 and seat mounting bracket 6.
  • the two-arm lever 19 can swing between two limit pins 31 and 32 on mounting frame 5.
  • pivot point 16 of activating lever 17 and connecting arm 21 is located above the line between pivot point 33 on the front seat mounting bracket 7 and pin 23 on the .mounting frame 5.
  • the pivot point 16 thus lies above the dead'center line and is biased in this position by spring 25 which exerts a force via the connecting arm 21 toward the front side of the chair, so that footrest 15 is kept in its retracted position while the chair is in the sitting position and cannot accidentally snap out by itself.
  • Guide pin 23 in this position is located roughly in the forward third of slot 22.
  • the user need only exert a slight rearward pressure against the two arm rests 2, so that the seat 3 will perform a relative backward motion with respect to frame 1 and mounting frame 5.
  • the push-pull rod 20 also moves to the rear with seat 3 since it is pivoted on seat mounting bracket 6. This pivots the activating lever 17 around its point of rotation 18 so that the footrest is extended out.
  • the footrest is extended not only through the relative motion of the seat with respect to the frame, but also through the motion of lever 17. This is why seat 3 need not be shifted very far back with respect to the frame, so that the center of gravity likewise is not shifted too far to the rear and thereby the chair is prevented from tipping over the rear casters 29.
  • slot 22 moves with respect to guide pin 23 in such a way that the latter, first of all, comes to rest against the front end of slot 22 as the dead-center position is reached, and then comes to rest on the rear end of the slot when the footrest is fully extended.
  • the guide pin 23 limits the extension motion of the footrest.
  • the backrest will pivot or swing around point 34 on mounting frame 5 which is in a fixed position with respect to the chair frame 1, and thus pulls the seat 3 to the rear via seat mounting bracket 6.
  • Mounting bracket 6 transmits this motion to the rod 20 which is pivoted to the lower end of the activating lever 17. Because the footrest is fully extended, the activating lever 17 can no longer perform any further swinging motion. Therefore, the force of rod 20 is transmitted via pivot point 18 to the two-arm lever 19 which, in turn, is swung around its own pivot point 35 on mounting frame 5, stretching spring 24, until it reaches stop pin 32.
  • levers 17 and 19 become parallel (FIG- URE 3), the front part of seat 3 as well as the footrest 15 are raised even more, and the angle between seat 3 and back rest 4 is considerably increased so that a comfortable prone resting position is reached.
  • Connecting arm 21 moves to the rear so that pin 23 roughly comes to lie in the middle of slot 22. Because the lower arm of lever 19 is moved forward and because the rear end of connecting arm 21 moves to the rear, spring 24 is extended very heavily.
  • a headrest 27 can be mounted on an arm 28 in such a way that it can be swung into the inside space of the back rest when not in use.
  • a lever adjusting mechanism for a reclining chair havlng an extendable footrest including an activating lever for the footrest having one end pivotally connected to a footrest support arm and the other end pivotally connected to one end of a push-pull rod whose other end is pivotally connected to the chair seat, comprising:
  • a lever adjusting mechanism as defined in claim 1 further comprising a tension spring connected between the other end of the connecting arm and the chair seat.
  • a lever adjusting mechanism as defined in claim 1 in which the tension spring acts to extend the footrest when the chair is moved from a sitting position and to return the chair from a prone position to a reclining position when pressure is removed from the back rest.

Landscapes

  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)
US731581A 1967-05-23 1968-05-23 Lever adjusting mechanism for reclining chairs Expired - Lifetime US3492045A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1654251A DE1654251C3 (de) 1967-05-23 1967-05-23 Hebelverstellgetriebe für Sitz-Liegesessel
US73158168A 1968-05-23 1968-05-23

Publications (1)

Publication Number Publication Date
US3492045A true US3492045A (en) 1970-01-27

Family

ID=41600769

Family Applications (1)

Application Number Title Priority Date Filing Date
US731581A Expired - Lifetime US3492045A (en) 1967-05-23 1968-05-23 Lever adjusting mechanism for reclining chairs

Country Status (11)

Country Link
US (1) US3492045A (da)
AT (1) AT275792B (da)
BE (1) BE715559A (da)
CH (1) CH485448A (da)
DE (1) DE1654251C3 (da)
DK (1) DK127864B (da)
FR (1) FR1565269A (da)
GB (1) GB1233603A (da)
NL (1) NL154415B (da)
NO (1) NO132221C (da)
SE (1) SE355288B (da)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070126267A1 (en) * 2005-12-01 2007-06-07 Hoffman D S Reclining seating unit with backrest support frame and cloth backrest support deck
US20170295934A1 (en) * 2016-04-18 2017-10-19 Camatic Pty Ltd Reclinable seat
US10322044B2 (en) 2013-03-15 2019-06-18 Stryker Corporation Medical support apparatus
US20230072756A1 (en) * 2021-09-06 2023-03-09 Hhc Changzhou Corporation Recliner chair, love seat, or sofa with protective cover

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3412042A1 (de) * 1984-03-31 1985-10-03 Himolla Polstermöbelwerk GmbH, 8252 Taufkirchen Hebelverstellgetriebe fuer sitz-liegesessel mit ausfahrbarer beinstuetze

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3100668A (en) * 1960-02-17 1963-08-13 Gen Steel Products Inc Reclining chair
US3128122A (en) * 1961-05-23 1964-04-07 Gen Steel Products Inc Reclining chair fixture
US3348878A (en) * 1966-06-03 1967-10-24 Royal Dev Co Skirt lifter for chair with footrest
US3370884A (en) * 1966-03-23 1968-02-27 Royal Dev Co Chair with footrest
US3400975A (en) * 1967-02-01 1968-09-10 Royal Dev Co Footrest and associated linkage for chair
US3433527A (en) * 1967-04-17 1969-03-18 Dual Mfg & Eng Reclining mechanism for t-cushion chair

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3100668A (en) * 1960-02-17 1963-08-13 Gen Steel Products Inc Reclining chair
US3128122A (en) * 1961-05-23 1964-04-07 Gen Steel Products Inc Reclining chair fixture
US3370884A (en) * 1966-03-23 1968-02-27 Royal Dev Co Chair with footrest
US3348878A (en) * 1966-06-03 1967-10-24 Royal Dev Co Skirt lifter for chair with footrest
US3400975A (en) * 1967-02-01 1968-09-10 Royal Dev Co Footrest and associated linkage for chair
US3433527A (en) * 1967-04-17 1969-03-18 Dual Mfg & Eng Reclining mechanism for t-cushion chair

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070126267A1 (en) * 2005-12-01 2007-06-07 Hoffman D S Reclining seating unit with backrest support frame and cloth backrest support deck
US10322044B2 (en) 2013-03-15 2019-06-18 Stryker Corporation Medical support apparatus
US11559448B2 (en) 2013-03-15 2023-01-24 Stryker Corporation Medical support apparatus
US20170295934A1 (en) * 2016-04-18 2017-10-19 Camatic Pty Ltd Reclinable seat
US20230072756A1 (en) * 2021-09-06 2023-03-09 Hhc Changzhou Corporation Recliner chair, love seat, or sofa with protective cover

Also Published As

Publication number Publication date
CH485448A (de) 1970-02-15
GB1233603A (da) 1971-05-26
NL154415B (nl) 1977-09-15
DE1654251A1 (de) 1971-05-06
DE1654251C3 (de) 1978-09-28
AT275792B (de) 1969-11-10
NL6806956A (da) 1968-11-25
NO132221C (da) 1975-10-08
FR1565269A (da) 1969-04-25
BE715559A (da) 1968-10-16
DE1654251B2 (de) 1976-01-08
NO132221B (da) 1975-06-30
DK127864B (da) 1974-01-28
SE355288B (da) 1973-04-16

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