US4703974A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seat furniture
Assignee: Protoned BV
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Filing: 1985-10-10
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Granted: 1987-11-03
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Expires: 2005-10-10
Abstract
Abstract The seat furniture is provided with a seat-plate backrest inclination-adjusting mechanism (6), a single-column supporting device (2) and a supporting foot (1). The backrest is composed of a backrest bottom part (16) and a backrest top part (14), and when the backrest inclination is fixed the backrest top part (14) can additionally be moved, counter to the pressure exerted by a restoring-spring arrangement (13), so as to swing freely to the rear between a first and a second stop position of an adjusting-spring device (22).
Inventors
- 👤 Egon Brauning
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:24
CPC Classifications
A; A47; A47C; A47C7/00; A47C7/002; A47C7/004; A47C7/36; A47C7/40; A47C7/44; A47C7/441; A47C7/443; A47C7/445; A47C7/46
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
257 words
Seat furniture, comprising: a seat plate (15) and a backrest (14, 16), a seat plate and backrest inclination adjusting mechanism (6) for changing the inclinatonn of the seat plate and backrest in the same direction and independence on one another, the backrest having a bottom part (16) which is pivotably linked to the inclination-adjusting mechanism (6) and a top part (14) which is pivotably linked to the bottom part, the changing of the inclination of the backrest being in the manner of a pendulum movement between a first, at least approximately-vertical limiting position and a second, backwardly-tilted sloping position and fixable by locking the inclination-adjusting mechanism in a desired sloping position of the backrest therebetween, a sliding arrangement (13) connecting the bottom part (16) of the backrest to the seat plate (4), the sliding arrangement comprising a spring-loaded sliding member (20) and a bearing (18) for the pivotable link of the top part (14) of the backrest to the bottom part (16) thereof and spring and stop means (23, 42, 44) also connecting the top part (14) of the backrest to the bottom part (16) thereof for limiting the pivotable motion therebetween between the first, at least approximately-vertical and the second, backwardly-tilted, sloping positions thereof, whereby in its first position the backrest top part (14) loosely rests on the spring-loaded sliding member (20) in a pushed out position, and in its second position it urges the sliding member (20) against the force of the spring and stop means into a pushed in position of the sliding arrangement.
Claim 2
Dependent Claim
257 words
Seat furniture, comprising: a seat plate (15) and a backrest (14, 16), a seat plate and backrest inclination adjusting mechanism (6) for changing the inclinatonn of the seat plate and backrest in the same direction and independence on one another, the backrest having a bottom part (16) which is pivotably linked to the inclination-adjusting mechanism (6) and a top part (14) which is pivotably linked to the bottom part, the changing of the inclination of the backrest being in the manner of a pendulum movement between a first, at least approximately-vertical limiting position and a second, backwardly-tilted sloping position and fixable by locking the inclination-adjusting mechanism in a desired sloping position of the backrest therebetween, a sliding arrangement (13) connecting the bottom part (16) of the backrest to the seat plate (4), the sliding arrangement comprising a spring-loaded sliding member (20) and a bearing (18) for the pivotable link of the top part (14) of the backrest to the bottom part (16) thereof and spring and stop means (23, 42, 44) also connecting the top part (14) of the backrest to the bottom part (16) thereof for limiting the pivotable motion therebetween between the first, at least approximately-vertical and the second, backwardly-tilted, sloping positions thereof, whereby in its first position the backrest top part (14) loosely rests on the spring-loaded sliding member (20) in a pushed out position, and in its second position it urges the sliding member (20) against the force of the spring and stop means into a pushed in position of the sliding arrangement.
Claim 3
Dependent Claim
74 words
Seat furniture according to claim 1, wherein the spring and stop means comprise an elongate leaf spring (23) connected to the bottom part (16) of the backrest, stop means (42, 44) on the top part (14) of the backrest comprising a guide pocket (24) for the leaf spring (23) having a first stop element (45.1) and a second stop element (45.2), and a cam on the leaf spring for movement between the stop elements.
Claim 4
Dependent Claim
43 words
Seat furniture according to claim 2, wherein the leaf spring (23) has a pair of bending points (46.1, 46.2) between the bottom part (16) of the backrest and the stop elements (45.1, 45.2) for achieving a springiness effective in the longitudinal direction thereof.
Claim 5
Dependent Claim
89 words
Seat furniture according to claim 2, and further comprising an upper armrest leg pivotable about a first bearing point at one end and on the bottom part of the backrest, a lower armrest leg pivotable about a second bearing point at one end and on the seat plate, opposite ends of the upper and lower armrest legs each having a bend and being arranged on top of one another for defining an armrest bending point, and a guide element for so maintaining both opposite ends of the armrest legs.
Claim 6
Dependent Claim
89 words
Seat furniture according to claim 3, and further comprising an upper armrest leg pivotable about a first bearing point at one end and on the bottom part of the backrest, a lower armrest leg pivotable about a second bearing point at one end and on the seat plate, opposite ends of the upper and lower armrest legs each having a bend and being arranged on top of one another for defining an armrest bending point, and a guide element for so maintaining both opposite ends of the armrest legs.
Claim 7
Dependent Claim
26 words
Seat furniture according to claim 1, and further comprising a headrest (51) pivotably connected to the other end of the top part (14) of the backrest.
Claim 8
Dependent Claim
36 words
Seat furniture according to claim 6, and further comprising, for the pivotable connection between the top part (14) of the backrest and the headrest (51), hinges and a leaf spring at a distance behind the hinges.
Claim 9
Dependent Claim
49 words
Seat furniture according to claim 7, and further comprising, for displacing the leaf spring longitudinally along the backrest, first and second stop devices, and wherein, in the region of the pivotable connection, the leaf spring is bent for averting the headrest relative to the backrest toward the seat plate.
Claim 10
Dependent Claim
92 words
Seat furniture according to claim 1, and further comprising an upper armrest leg pivotable about a first bearing point at one end and on the bottom part of the backrest, a lower armrest leg pivotable about a second bearing point at one end and on the seat plate, opposite, free ends of the upper and lower armrest legs each having a bend and being arranged on top of one another for defining an armrest bending point , and a guide element for so maintaining both the opposite ends of the armrest legs.
Claim 11
Dependent Claim
32 words
Seat furniture according to claim 9, wherein the upper and lower armrest legs each have a joint bush at their one ends and a leg core connected to their respective joint bush.
Claim 12
Dependent Claim
52 words
Seat furniture according to claim 10, wherein the leg cores each consist of a dimensionally stable material and the guide element is a pocket structure made of a flexible material, the leg cores being guided in the pocket structure at least over some of their extent at a distance from the bends.
Claim 13
Dependent Claim
27 words
Seat furniture according to claim 11, wherein, for separating the leg bends from one another, the pocket structure is a double pocket formed at the bending point.
Claim 14
Dependent Claim
96 words
Seat furniture according to claim 1, and further comprising a supporting foot comprising a supporting column for supporting the seat plate and backrest at one end and having a central hub at the opposite end, a number of supporting legs arranged about the central hub, spokes between the hub and each of the respective supporting legs, each spoke having a claw member attached to the distal end thereof for receiving a respective one of the supporting legs, and radially inwardly from the claw member being provided with a casing element in clamping engagement with the spoke.
Claim 15
Dependent Claim
65 words
Seat furniture according to claim 13, wherein each spoke has, at least in its digital end region, a cavity, each claw member has a shell-type wall partially surrounding the respective spoke end region, and further comprising retaining means for centering and fastening each claw member on the respective spoke which, to engage into the respective cavity, are arranged on the inside of the shell-type wall.
Claim 16
Dependent Claim
48 words
Seat furniture according to claim 14, wherein each claw member has a plug-in centering part screwing into the cavity of the respective spoke, and further comprising an assembly pin passing through an orifice into each cavity for securing the screw connection between the respective claw member and spoke.
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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) | 1990-11-02 | 1991-05-04 | 1991-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-02 | 1995-05-04 | 1995-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-11-02 | 1999-05-04 | 1999-11-03 | $7700.00 | Window Closed / Lapsed |