US4072341A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable chair
Assignee: Kurz GmbH
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Filing: 1975-12-01
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Granted: 1978-02-07
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Expires: 1995-12-01
Abstract
Abstract An adjustable chair as a seat, a backrest pivoted on the seat for movement between an erect and an reclined position, and a leg rest mounted on the seat for movement between a retracted and an extended position. The seat is mounted on lateral portions of a frame for pivoting so that the angular position of the backrest relative to the frame may be changed either by pivoting the backrest relative to the seat, or by pivoting the seat relative to the frame. A damping arrangement damps the movement of the backrest relative to the frame at least between some of the angular positions of the backrest, and an arresting arrangement including interengaging teeth is accommodated in an armrest pivoted on the backrest, which arrangement permits arresting the backrest in a selected one of the angular positions thereof. The damping arrangement includes a helical spring accommodated in the armrest and having one end connected to the backrest and a free end into which a connecting rod connected to a lateral portion of the frame extends, the connecting rod and the spring having cooperating abutments which engage one another within a certain range of movement of the backrest so that the spring is tensioned and thus damps the movement of the backrest. A connecting member is pivotably mounted on one of the lateral portions and has a closed elongated slot, and the seat has a projecting member which is received and guided in the elongated slot, whereby the seat is limited to movement between a substantially horizontal and an inclined position.
Inventors
- 👤 Rudolf Kurz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:52
CPC Classifications
A; A47; A47C; A47C1/00; A47C1/02; A47C1/031; A47C1/034; A47C1/035; A47C1/032; A47C1/03205; A47C1/03238; A47C1/03244
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
354 words
In an adjustable chair, a combination comprising a frame including a pair of lateral portions; a seat; a backrest; means for connecting said backrest to said frame for movement relative thereto through a series of first positions between an erect and an intermediate position, and through a series of second positions between said intermediate and a fully reclined position; means for arresting said backrest in selected ones of said first positions, including a first arresting member connected to said frame and a second arresting member connected to said backrest for movement therewith relative to said first arresting member, one of said arresting members having at least one detent projection and the other arresting member including an arresting portion juxtaposed with a region of movement of said detent projection relative to said arresting portion which corresponds to the movement of said backrest between said erect and intermediate positions and having a plurality of detent recesses in a selected one of which said detent projection is received to arrest said backrest in a selected first position, whereas said detent projection is outside said region in said second positions of said backrest so that the latter is infinitely adjustable between said second positions; a pair of armrests each associated with one of said lateral portions; a pivot connecting a respective one of said armrests to said backrest; and means accommodated in at least said one armrest and operative for damping said movement of said backrest toward said fully reclined position thereof at least in a range in which said backrest approaches said fully reclined position, said damping means including a helical tension spring having two ends one of which is attached to said pivot, and a connecting rod attached to said associated lateral portion and partially accommodated in said tension spring, said tension spring and said connecting rod having associated abutment portions which are disengaged from one another when said backrest is outside said range and engage one another when said backrest is within said range so that movement of said backrest in said range toward said fully reclined position results in tensioning of said tension spring.
Claim 2
Dependent Claim
354 words
In an adjustable chair, a combination comprising a frame including a pair of lateral portions; a seat; a backrest; means for connecting said backrest to said frame for movement relative thereto through a series of first positions between an erect and an intermediate position, and through a series of second positions between said intermediate and a fully reclined position; means for arresting said backrest in selected ones of said first positions, including a first arresting member connected to said frame and a second arresting member connected to said backrest for movement therewith relative to said first arresting member, one of said arresting members having at least one detent projection and the other arresting member including an arresting portion juxtaposed with a region of movement of said detent projection relative to said arresting portion which corresponds to the movement of said backrest between said erect and intermediate positions and having a plurality of detent recesses in a selected one of which said detent projection is received to arrest said backrest in a selected first position, whereas said detent projection is outside said region in said second positions of said backrest so that the latter is infinitely adjustable between said second positions; a pair of armrests each associated with one of said lateral portions; a pivot connecting a respective one of said armrests to said backrest; and means accommodated in at least said one armrest and operative for damping said movement of said backrest toward said fully reclined position thereof at least in a range in which said backrest approaches said fully reclined position, said damping means including a helical tension spring having two ends one of which is attached to said pivot, and a connecting rod attached to said associated lateral portion and partially accommodated in said tension spring, said tension spring and said connecting rod having associated abutment portions which are disengaged from one another when said backrest is outside said range and engage one another when said backrest is within said range so that movement of said backrest in said range toward said fully reclined position results in tensioning of said tension spring.
Claim 3
Dependent Claim
294 words
In an adjustable chair, a combination comprising a frame; a seat; a backrest; means for connecting said backrest to said frame for movement relative thereto through a series of first positions between an erect and an intermediate position, and through a series of second positions between said intermediate and a fully reclined position; means for arresting said backrest in selected ones of said first positions, including a first arresting member connected to said frame and a second arresting member connected to said backrest for movement therewith relative to said first arresting member, one of said arresting members having at least one detent projection and the other arresting member including an arresting portion juxtaposed with a region of movement of said detent projection relative to said arresting portion which corresponds to the movement of said backrest between said erect and intermediate positions and having a plurality of detent recesses in a selected one of which said detent projection is received to arrest said backrest in a selected first position, whereas said detent projection is outside said region in said second positions of said backrest so that the latter is infinitely adjustable between said second positions; and means for damping said movement of said backrest between a predetermined one of said first, intermediate and second positions which is spaced from said erect position, and said fully reclined position, said damping means including a damping member and an activating member which conduct relative movement with respect to one another during said movement of said backrest and have associated abutment portions which are disengaged from one another when said backrest is outside said range and engage each other when said backrest is within said range to activate said damping member only while said backrest is in said range.
Claim 4
Dependent Claim
294 words
In an adjustable chair, a combination comprising a frame; a seat; a backrest; means for connecting said backrest to said frame for movement relative thereto through a series of first positions between an erect and an intermediate position, and through a series of second positions between said intermediate and a fully reclined position; means for arresting said backrest in selected ones of said first positions, including a first arresting member connected to said frame and a second arresting member connected to said backrest for movement therewith relative to said first arresting member, one of said arresting members having at least one detent projection and the other arresting member including an arresting portion juxtaposed with a region of movement of said detent projection relative to said arresting portion which corresponds to the movement of said backrest between said erect and intermediate positions and having a plurality of detent recesses in a selected one of which said detent projection is received to arrest said backrest in a selected first position, whereas said detent projection is outside said region in said second positions of said backrest so that the latter is infinitely adjustable between said second positions; and means for damping said movement of said backrest between a predetermined one of said first, intermediate and second positions which is spaced from said erect position, and said fully reclined position, said damping means including a damping member and an activating member which conduct relative movement with respect to one another during said movement of said backrest and have associated abutment portions which are disengaged from one another when said backrest is outside said range and engage each other when said backrest is within said range to activate said damping member only while said backrest is in said range.
Claim 5
Dependent Claim
44 words
A combination as defined in claim 2, wherein said frame includes a pair of lateral portions; wherein said connecting means mounts said backrest between said lateral portions of said frame; and wherein said first arresting member is connected to one of said lateral portions.
Claim 6
Dependent Claim
46 words
A combination as defined in claim 3, wherein said second arresting member is an armrest which is connected to said backrest for pivoting between a first position in which said arresting members are disengaged, and a second position in which said arresting members engage one another.
Claim 7
Dependent Claim
63 words
A combination as defined in claim 4, wherein said armrest has a row of teeth which project from said armrest toward said first arresting member and define with one another said detent recesses; and wherein said first arresting member has a single tooth which constitutes said detent projection and engages a respective tooth of said row when received in said one detent recess.
Claim 8
Dependent Claim
38 words
A combination as defined in claim 5, wherein said arresting means includes additional first and second arresting members similar to said first and second arresting members and associated with the other of said lateral portions of said frame.
Claim 9
Dependent Claim
60 words
A combination as defined in claim 2, wherein said frame includes a pair of lateral portions; further including a pair of armrests associated with said lateral portions and connected to said backrest; and wherein said damping and activating means is accommodated in at least one of said armrests and connected to said backrest and to said associated lateral portion, respectively.
Claim 10
Dependent Claim
35 words
A combination as defined in claim 7, wherein said damping member is a helical spring one end of which cooperates with said associated lateral portion and the other end of which cooperates with said armrest.
Claim 11
Dependent Claim
31 words
A combination as defined in claim 8, further including a pivot connecting said armrest to said backrest; and wherein said other end of said helical spring is attached to said pivot.
Claim 12
Dependent Claim
33 words
A combination as defined in claim 2, and further including means for mounting said seat on said frame; and wherein said connecting means includes means for pivotally supporting said backrest on said seat.
Claim 13
Dependent Claim
64 words
A combination as defined in claim 10; and further including a leg rest; means for pivotably mounting said leg rest on said seat for movement between a retracted position and an extended position; and means connecting said backrest with said leg rest for movement of the latter between said positions thereof in response to the movement of the former between said angular positions thereof.
Claim 14
Dependent Claim
39 words
A combination as defined in claim 10, wherein said frame includes a pair of lateral portions; and wherein said mounting means mounts said seat on said lateral portions for pivoting between a substantially horizontal position and an inclined position.
Claim 15
Dependent Claim
30 words
A combination as defined in claim 12; and further comprising means for limiting pivoting of said seat beyond said inclined position when considered in direction from said substantially horizontal position.
Claim 16
Dependent Claim
50 words
A combination as defined in claim 13, wherein said limiting means includes at least one connecting member pivotably mounted on one of said lateral portions of said frame and having a closed elongated slot, and a projecting member on said seat, which is received and guided in said elongated slot.
Claim 17
Dependent Claim
52 words
A combination as defined in claim 10, wherein each of said lateral portions includes two leg members which are pivotably connected to one another, and a reinforcing member which connects said leg members with one another; and wherein said mounting means mounts said seat on said reinforcing members of said lateral portions.
Claim 18
Dependent Claim
41 words
A combination as defined in claim 10, and further including abutment means on at least one of said lateral portions and operative for preventing pivoting of said seat beyond said substantially horizontal position when considered in direction from said inclined position.
Claim 19
Dependent Claim
40 words
A combination as defined in claim 9, wherein said activating member is a connecting rod attached to said associated lateral portion and partially accommodated in said spring, and said associated abutment portions are on said spring and said connecting rod.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-02-06 | 1981-08-08 | 1982-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-06 | 1985-08-08 | 1986-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-06 | 1989-08-08 | 1990-02-07 | $7700.00 | Window Closed / Lapsed |