US3836198A - Manually movable headrest for chairs - Google Patents
Manually movable headrest for chairs Download PDFInfo
- Publication number
- US3836198A US3836198A US00325919A US32591973A US3836198A US 3836198 A US3836198 A US 3836198A US 00325919 A US00325919 A US 00325919A US 32591973 A US32591973 A US 32591973A US 3836198 A US3836198 A US 3836198A
- Authority
- US
- United States
- Prior art keywords
- headrest
- back panel
- arm
- combination
- linkage
- 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
Links
- 239000011435 rock Substances 0.000 claims abstract description 41
- 230000007246 mechanism Effects 0.000 description 10
- 230000000717 retained effect Effects 0.000 description 2
- 102100030341 Ethanolaminephosphotransferase 1 Human genes 0.000 description 1
- 101000938340 Homo sapiens Ethanolaminephosphotransferase 1 Proteins 0.000 description 1
- 241001077878 Neurolaena lobata Species 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C7/00—Parts, details, or accessories of chairs or stools
- A47C7/36—Support for the head or the back
- A47C7/40—Support for the head or the back for the back
- A47C7/402—Support for the head or the back for the back adjustable in height
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C7/00—Parts, details, or accessories of chairs or stools
- A47C7/36—Support for the head or the back
- A47C7/38—Support for the head or the back for the head
Definitions
- ABSTRACT A manually operated linkage means moves a back panel-headrest for a lounge chair between a retracted position and an extended position.
- Each of a pair of mounting plates on the sides of a cavity in the chair back is connected by a pair of movable links with brackets on the back panel to form four bar linkages
- actuating linkage means connects each four bar linkage with a rock shaft
- one of the rock shafts is provided with an operating handle
- a cross bar connects the linkages for simultaneous movement.
- Tension spring means connecting the linkage with the chair back is constantly under tension and moves through a point of maximum tension as the back panel-headrest moves between its retracted and extended positions, thereby urging the back panelheadrest against stops in both said positions.
- the principal object of the invention is to provide improved mechanisms for manually moving a headrest between a retracted position in a rearwardly open cavity in the chair back and an extended position above the chair back.
- Yet another object of the invention is to provide such a mechanism which is easily operated by a person sitting in the chair by rotating an operating handle in either of two directions.
- Yet another object of the invention is to provide a simple, rugged and inexpensive linkage mechanism for manually extending and retracting a headrest, with the linkage mechanism using only rotatable links without lost motion connections.
- Still another object of the invention is to provide a manual headrest operating mechanism which has stops at the two limits of the travel of the headrest. and which is provided with tension spring means that urges the mechanism firmly against the stops in both of said limit positions so as to retain the headrest firmly in said positions while permitting it to be moved from either position solely by rotation of the operating handle.
- FIG. 1 is a perspective view of a lounge chair with a headrest of the present type in its extended position;
- FIG. 2 is a vertical sectional view which shows the linkage means at one side of the chair back in the retracted position of the headrest with part of the connecting cross bar broken away for clarity of illustration, the back panel-headrest and the chair back being illustrated in broken lines except for certain back frame parts;
- FIG. 3 is a fragmentary rear elevational view of the linkage means in the position of FIG. 2:
- FIG. 4 is a view similar to FIG. 2 with the linkage means generally at the mid-point of its travel between retracted and extended positions;
- FIG. 5 is a view similar to FIG. 2 with the linkage means in the extended position of the headrest.
- a lounge chair indicated generally at L, includes upholstered arms A and an upholstered back B.
- the back B has a rearwardly open cavity which is defined by side panels 11 and 12, a top cross rail 13 and a bottom cross rail 14.
- a back panel-headrest includes a back panel 15 surmounted by a forwardly projecting headrest 16; and as seen in FIG. 2, in the retracted position of the headrest it is received within the cavity 10 in the chair back and the back panel 15 substantially closes the cavity.
- the back panel 15 is behind the top rail 13 and the headrest 16 is above the back B.
- a back panel-headrest carrier means on the side panel 11 at the right hand side of the chair back is a back panel-headrest carrier means, indicated generally at 17, which has a counterpart, indicated generally at 18, on the left hand side panel 12 that is identical with the carrier 11 except for lacking any means to receive an operating handle 19 (FIG. 3) alongside the back where it is readily accessible to a person seated in the chair. Since the carrier means 17 and 18 are mechanically identical only the carrier means 17 will be described in detail herein.
- a mounting plate 20 is secured on the side panel 11 by means of screws. and a collapsible and expandable linkage means, indicated generally at 21, is pivotally supported upon the mounting plate 20 and supports an angle bracket 22.
- the back panel 15 is secured to the angle brackets of the carrier means 17 and 18.
- the collapsible and expandable linkage 21 includes an upper movable link 23 and a lower movable link 24 which are pivoted on the mounting plate 20 on vertically spaced pivots 25 and 26, respectively, and which are respectively pivotally connected to the angle bracket 22 by pivots 27 and 28.
- the mounting plate 20, the movable links 23 and 24 and the angle bracket 22 constitute a four bar linkage on which the back panel-headrest is moved between the retracted position of FIG. 2 and the extended position of FIG. 5.
- the linkage means 21 also includes a drive linkage system, indicated generally at 29, which connects the lower movable link 24 with a rock shaft 30.
- the rock shaft 30 comprises a shoulder stud 31 which is journalled in a hole in the mounting plate 20 and has an integral square shaft 32 on one end portion 32a of which extends through the side panel 11 and receives the handle 19, and the other end portion 32b of which extends inwardly and carries an operating arm 33.
- a nylon washer 34 surrounds the shaft portion 32b between the mounting plate 20 and the arm 33; and the rock shaft is retained in place by upsetting its inner end portion 32b.
- the arm 33 carries an angle bracket 35, and between said bracket 35 and its counterpart on the carrier means 18 is a cross member 36 that includes mounting arms 37 and a cross member 38.
- rotation of the rock shaft 30 by the handle 19 acts through the cross member 36 to cause simultaneous movement of the rock shaft in the carrier means 18.
- the drive linkage system 29 also includes an intermediate link 39 which is pivoted at 40 on the free end of the arm 33 to form a toggle linkage, and a bell crank 41 which is fulcrumed at 42 on the intermediate link 39 and has a first arm 410 which is pivotally connected at 43 to the movable link 24. Finally, a control link 44 is pivotally connected at 45 to the second arm 41b of the bell crank 41, and has a pivotal connection 46 to the mounting plate 20.
- Stop means is provided for limiting the travel of the collapsible and extendable linkage system 21 at the retracted position of the back panel-headrest and at the extended position thereof.
- An inwardly projecting stud 47 on the mounting plate 20 is positioned to be contacted by the movable link 23 when the mechanism is in the retracted position of the back panel-headrest.
- the stop means for limiting movement to the extended position includes a finger 48 at the outer end of the drive linkage arm 33 and a finger 49 at the adjacent end of the intermediate link 39, and as seen in FIG. said fingers have straight edges which abut in the fully extended position of the linkage means.
- tension spring means In order that the back panel-headrest may be firmly retained in both its retracted and extended positions while permitting it to be moved from either position to the other by rotation of the handle 19, tension spring means, indicated generally at 50, is provided.
- the tension spring means comprises two tension springs 51, each of which has one end connected to a headed spring stud 52 on one of the mounting arms 37 of the cross member 36, and each of which has its other end connected to a spring anchoring bracket 53 which is mounted on the bottom cross rail 14 of the chair back.
- the springs 51 are constantly under tension, and comparison of FIGS. 2, 4 and 5 shows that during movement of the linkage means from the retracted position of FIG. 2 to the extended position of FIG. 5 the spring passes through a point of maximum extension (approximately at the position of FIG.
- the spring means 50 urges the back panel-headrest both to its fully retracted position and to its fully extended position.
- the resilient urging of the spring may be readily overcome by rotating the handle forwardly and upwardly from the retracted position of FIG. 2 to the extended position of FIG. 5, or downwardly and rearwardly from the extended position of FIG. 5 to the retracted position of FIG. 2.
- a lounge chair having an upholstered seat and back, said back having a rearwardly open cavity defined by side panels and a top cross rail, aback panel surmounted by a forwardly projecting headrest, and carrier means supporting said back panel-headrest for movement between a retracted position in which the back panel closes the rear of the cavity with the headrest within the cavity, and an extended position with the back panel behind the top rail and the headrest above the upholstered back, said carrier means comprising in combination:
- a collapsible and expandable linkage means associated with each of said mounting plates and connecting the associated mounting plate with an adjacent one of the brackets.
- said linkage means having coaxial transverse rock shafts, one of said rock shafts extending through the side panel to which the associated plate is secured;
- stop means limiting movement of said back panelheadrest in both directions
- tension spring means connected to the linkage means and to a portion of the chair back, said tension spring means being under tension at all times and swinging through a position of maximum tension as the back panel-headrest moves between retracted and extended positions, whereby said spring means urges the back panel-headrest against the top means in both directions.
- the spring means comprises two tension springs each of which has one end secured to the cross bar adjacent one of the two linkage means and the other end secured to the chair back below the cavity.
- each linkage means includes a four bar linkage consisting of two movable links pivoted on vertically spaced pivots on the associated mounting plate and on vertically spaced pivots on the adjacent bracket, a drive linkage system having one end fixed on the rock shaft and the other end pivotally connected to a movable link, and control link means connecting the drive linkage system to the mounting plate.
- the drive linkage system comprises an arm on the rock shaft, an intermediate link having a first end pivoted on the free end of the arm, and a bell crank fulcrumed on the sec ond end of the intermediate link, said bell crank having one arm pivotally connected to said movable link and the control link means being pivoted on the other arm of the bell crank.
- stop means includes projecting fingers on the arm and on the adjacent end of the intermediate link, said fingers abutting when the back panel-headrest is in extended position.
- stop means also includes inwardly projecting studs on the mounting plates against which one of the movable links abuts when the back panel-headrest is in retracted position.
- stop means also includes inwardly projecting studs on the mounting plates against which one of the movable links abuts when the back panel-headrest is in retracted position.
- a lounge chair having an upholstered seat and back, said back having a rearwardly open cavity defined by side panels and a top cross rail, a back panel surmounted by a forwardly projecting headrest, and carrier means supporting said back panel-headrest for movement between a retracted position in which the back panel closes the rear of the cavity with the headrest within the cavity, and an extended position with the back panel behind the top rail and the headrest above the upholstered back, said carrier means comprising in combination;
- each said linkage means including a four bar linkage consisting of two movable links pivoted on vertically spaced pivots on the associated mounting plate and on vertically spaced pivots on the adjacent bracket, a drive linkage system having one end fixed on the rock shaft and the other end pivotally connected to a movable link, and control link means connecting the drive linkage system to the mounting plate, rotation of the rock shafts moving the back panelheadrest between retracted and extended positions;
- stop means limiting movement of said back panelheadrest in both directions
- the drive linkage system comprises an arm on the rock shaft, an intermediate link having a first end pivoted on the free end of the arm, and a bell crank fulcrumed on the second end of the intermediate link, said bell crank having one arm pivotally connected to said movable link and the control link means being pivoted on the other arm of the bell crank.
- stop means includes projecting fingers on the arm and on the adjacent end of the intermediate link, said fingers abutting when the back panel-headrest is in extended position.
- stop means also includes inwardly projecting studs on the mounting plates against which one of the movable links abuts when the back panel-headrest is in retracted position.
- stop means also includes inwardly projecting studs on the mounting plates against which one of the movable links abuts when the back panel-headrest is in retracted posi-
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Abstract
Description
Claims (18)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US00325919A US3836198A (en) | 1973-01-22 | 1973-01-22 | Manually movable headrest for chairs |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US00325919A US3836198A (en) | 1973-01-22 | 1973-01-22 | Manually movable headrest for chairs |
Publications (1)
Publication Number | Publication Date |
---|---|
US3836198A true US3836198A (en) | 1974-09-17 |
Family
ID=23270011
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00325919A Expired - Lifetime US3836198A (en) | 1973-01-22 | 1973-01-22 | Manually movable headrest for chairs |
Country Status (1)
Country | Link |
---|---|
US (1) | US3836198A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4451081A (en) * | 1982-01-06 | 1984-05-29 | Mohasco Corporation | Headrest for a reclining chair |
US20110175422A1 (en) * | 2010-01-21 | 2011-07-21 | Bae Industries, Inc. | Scissor retractable headrest |
US20160227933A1 (en) * | 2014-09-26 | 2016-08-11 | L&P Property Management Company | Headrest tilt mechanism |
CN107788737A (en) * | 2016-08-30 | 2018-03-13 | L & P 产权管理公司 | Turnover head rest tilt and waist mechanism |
US10123625B2 (en) * | 2014-09-26 | 2018-11-13 | L&P Property Management Company | Reversible headrest tilt, lumbar mechanism |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2982340A (en) * | 1959-09-30 | 1961-05-02 | Albert M Spound | Reclining chair headrest constructions |
US3008766A (en) * | 1958-04-02 | 1961-11-14 | Anton Lorenz | Upholstered chairs having reclining backs |
US3652125A (en) * | 1970-03-10 | 1972-03-28 | Royal Dev Co | Reclining chair |
US3743349A (en) * | 1971-12-16 | 1973-07-03 | Lear Siegler Inc | Multiple position reclining chair assembly |
-
1973
- 1973-01-22 US US00325919A patent/US3836198A/en not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3008766A (en) * | 1958-04-02 | 1961-11-14 | Anton Lorenz | Upholstered chairs having reclining backs |
US2982340A (en) * | 1959-09-30 | 1961-05-02 | Albert M Spound | Reclining chair headrest constructions |
US3652125A (en) * | 1970-03-10 | 1972-03-28 | Royal Dev Co | Reclining chair |
US3743349A (en) * | 1971-12-16 | 1973-07-03 | Lear Siegler Inc | Multiple position reclining chair assembly |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4451081A (en) * | 1982-01-06 | 1984-05-29 | Mohasco Corporation | Headrest for a reclining chair |
US20110175422A1 (en) * | 2010-01-21 | 2011-07-21 | Bae Industries, Inc. | Scissor retractable headrest |
US8573686B2 (en) | 2010-01-21 | 2013-11-05 | Bae Industries, Inc. | Scissor retractable headrest |
US20160227933A1 (en) * | 2014-09-26 | 2016-08-11 | L&P Property Management Company | Headrest tilt mechanism |
US9730522B2 (en) * | 2014-09-26 | 2017-08-15 | L&P Property Management Company | Headrest tilt mechanism |
US10123625B2 (en) * | 2014-09-26 | 2018-11-13 | L&P Property Management Company | Reversible headrest tilt, lumbar mechanism |
US10383447B2 (en) | 2014-09-26 | 2019-08-20 | L&P Property Management Company | Reversible headrest tilt, lumbar mechanism |
US10610022B2 (en) | 2014-09-26 | 2020-04-07 | L&P Property Management Company | Headrest tilt mechanism |
CN107788737A (en) * | 2016-08-30 | 2018-03-13 | L & P 产权管理公司 | Turnover head rest tilt and waist mechanism |
CN107788737B (en) * | 2016-08-30 | 2021-11-19 | L & P 产权管理公司 | Reversible headrest tilt and lumbar mechanism |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: BANK ONE, LEXINGTON, NA, 200 WEST VINE STREET LEXI Free format text: SECURITY INTEREST;ASSIGNOR:PIONEER MANUFACTURING, INC.,;REEL/FRAME:005077/0553 Owner name: PIONEER MANUFACTURING, INC., LEMONS MILL PIKE, GEO Free format text: ASSIGNS THE ENTIRE INTEREST EFFECTIVE AS MAY 9, 1984;ASSIGNOR:HOOVER UNIVERSAL, INC.;REEL/FRAME:005113/0044 Effective date: 19670124 |
|
AS | Assignment |
Owner name: HOOVER BALL AND BEARING COMPANY, MICHIGAN Free format text: MERGER;ASSIGNOR:HOOVER BALL AND BEARING COMPANY;REEL/FRAME:005241/0077 Effective date: 19770711 Owner name: HOOVER UNIVERSAL INC., A CORP. OF MI Free format text: CHANGE OF NAME;ASSIGNOR:HOOVER BALL & BEARING COMPANY;REEL/FRAME:005224/0442 Effective date: 19780117 |