US3823440A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hinge fitting for seats with adjustable backrest, especially automotive vehicle seats
Assignee: KEIPER F DT
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Filing: 1973-06-06
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Granted: 1974-07-16
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Expires: 1993-06-06
Abstract
Abstract A hinge fitting for a seat, especially a motor vehicle seat, having a backrest pivotally adjustable with respect to the seat portion, in which adjusting means connect a hinge member fixed to the backrest and another hinge member fixed to the seat portion for pivotal movement with respect to each other. The adjusting means comprise an internally toothed ring gear connected to one of the hinge members, a spur gear meshing with the ring gear and connected to the other of said hinge members and having an outer diameter smaller by at least the height of one tooth than the root diameter of the gear ring, eccentric means including a pin fixed to one of the gears and an eccentric bysing cooperating with the other of the gears and mounted on the pin turnable and axially movable with respect thereto, and means connected to the bushing for moving the same in axial direction between a first position in which the bushing substantially prevents turning of the other gear relative to the pin and therewith to the one gear fixed to the pin, and a second position in which the bushing can turn freely with respect to the pin and permits turning of the gears relative to each other.
Inventors
- 👤 G Klingelhofer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:02
CPC Classifications
B; B60; B60N; B60N2/00; B60N2/02; B60N2/22; B60N2/225; B60N2/2252; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20576; Y10T74/20636; Y10T74/2066
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
213 words
A hinge fitting for seats having a seat portion and a backrest, especially for seats of automotive vehicles, comprising a first hinge part to be fixed to the seat portion; a second hinge part to be fixed to the backrest tiltable with respect to said first hinge part; an internally toothed ring gear fixed to one of said hinge parts; a spur gear fixed to the other hinge part and extending through said ring gear in mesh therewith, the diameter of the addendum circle of said spur gear being smaller by at least the height of one tooth than the diameter of the root circle of said ring gear, and the number of teeth of one gear differing from the number of teeth of the other gear; eccentric means cooperating with said gears and comprising a pin fixed to one of said gears and an eccentric bushing turnably mounted on said pin and slidable therewith in axial direction and cooperating with the other of said gears; and means connected to said eccentric bushing for moving the same in axial direction of said pin between a first bearing region with increased friction against turning and a second bearing with reduced friction of turning of said bushing relative to said pin and said other gear.
Claim 2
Dependent Claim
213 words
A hinge fitting for seats having a seat portion and a backrest, especially for seats of automotive vehicles, comprising a first hinge part to be fixed to the seat portion; a second hinge part to be fixed to the backrest tiltable with respect to said first hinge part; an internally toothed ring gear fixed to one of said hinge parts; a spur gear fixed to the other hinge part and extending through said ring gear in mesh therewith, the diameter of the addendum circle of said spur gear being smaller by at least the height of one tooth than the diameter of the root circle of said ring gear, and the number of teeth of one gear differing from the number of teeth of the other gear; eccentric means cooperating with said gears and comprising a pin fixed to one of said gears and an eccentric bushing turnably mounted on said pin and slidable therewith in axial direction and cooperating with the other of said gears; and means connected to said eccentric bushing for moving the same in axial direction of said pin between a first bearing region with increased friction against turning and a second bearing with reduced friction of turning of said bushing relative to said pin and said other gear.
Claim 3
Dependent Claim
107 words
A hinge fitting as defined in claim 1, wherein said one bearing region is formed by a cyclindrical opening provided in said other gear and engaged, when said bushing is in said one bearing region, by the outer periphery of an end portion of said bushing and said second bearing region is formed by a pair of friction reducing bearings, respectively connected to said other gear and said bushing and respectively engaged, when said bushing is in said second bearing region, by the outer periphery of a portion of said bushing adjacent to said end portion thereof and the outer periphery of a portion of said pin.
Claim 4
Dependent Claim
14 words
A hinge fitting as defined in claim 2, wherein said bearings are roller bearings.
Claim 5
Dependent Claim
44 words
A hinge fitting as defined in claim 2, and including a bearing housing connected to and axially projecting from said other gear, the bearing connected to the other gear being arranged within said bearing housing and connected through the latter to said other gear.
Claim 6
Dependent Claim
28 words
A hinge fitting as defined in claim 4, wherein said bearing housing haS a radially outwardly projecting flange fixed to said other gear within a collar provided thereon.
Claim 7
Dependent Claim
41 words
A hinge fitting as defined in claim 2, wherein said bearing regions are axially displaced from each other through a distance which is greater than the axial length of said end portion and said adjacent portion of said eccentric bushing, respectively.
Claim 8
Dependent Claim
29 words
A hinge fitting as defined in claim 6, wherein said end portion and said adjacent portion of said eccentric bushing border on each other and have different outer diameters.
Claim 9
Dependent Claim
44 words
A hinge fitting as defined in claim 7, wherein said adjacent portion of said eccentric bushing has a larger diameter than said end portion thereof and forms a shoulder against which said other gear abuts when said bushing is in said first bearing region.
Claim 10
Dependent Claim
27 words
A hinge fitting as defined in claim 7, wherein said end portion and said adjacent portion are chamfered at the ends thereof facing away from each other.
Claim 11
Dependent Claim
71 words
A hinge fitting as defined in claim 2, wherein said pair of friction reducing bearings comprise an outer roller bearing adapted to engage said eccentric bushing on the outer periphery and having a cage, and an inner roller bearing connected to said bushing on the inner periphery thereof and including a bearing housing supporting the cage of said outer roller bearing and being connected to said other gear axially projecting therefrom.
Claim 12
Dependent Claim
82 words
A hinge fitting as defined in claim 1, wherein said eccentric bushing has, at the end of said bushing facing away from said gears, an end wall extending transverse to the axis of said pin, said end wall being formed with an opening coaxial with said pin, and including a shifting bolt extending through said opening and connected to said end wall, and an actuating member fixed to said bolt for shifting the latter and said bushing connected thereto in axial direction.
Claim 13
Dependent Claim
59 words
A hinge fitting as defined in claim 11, wherein said pin of said eccentric is hollow and wherein said shifting bolt extends through and with an end portion thereof beyond said hollow pin, and including means connecting said end portion of said shifting bolt to said eccentric bushing turnably with respect thereto and for movement in axial direction therewith.
Claim 14
Dependent Claim
25 words
A hinge fitting as defined in claim 11, and including means cooperating with said eccentric bushing for biasing the latter toward said first bearing region.
Claim 15
Dependent Claim
17 words
A hinge fitting as defined in claim 13, wherein said biasing means acts on said shifting bolt.
Claim 16
Dependent Claim
86 words
A hinge fitting as defined in claim 12, wherein said hollow pin of said eccentric defines about a portion of said shifting bolt an elongated annular chamber, and including biasing means for biasing said eccentric bushing toward said first bearing region, said biasing means comprising a coil compression spring in said annular chamber and abutting with one end against a radially inwardly extending shoulder face formed on said pin and with the other end thereof against a radially outwardly extending shoulder face on said shifting bolt.
Claim 17
Dependent Claim
50 words
A hinge fitting as defined in claim 1, wherein said pin of said eccentric projects with an end portion thereof beyond said one gear and is provided at said end portion with a radially outwardly extending annular flange, and a weld seam fixedly connecting said flange to said one gear.
Claim 18
Dependent Claim
42 words
A hinge fitting as defined in claim 1, wherein said pin of said eccentric is fixedly connected to that gear which is fixed to said movable hinge part and said eccentric bushing cooperates with the gear fixed to the stationary hinge part.
Claim 19
Dependent Claim
32 words
A hinge fitting as defined in claim 1, wherein said ring gear is fixedly connected to said movable hinge part and said spur gear is fixedly connected to said stationary hinge part.
References Cited (Backward Citations)
US3352176A
Cited
US3328079A
Cited
US3423785A
Cited
US3401979A
Cited
US3478623A
Cited
US3562851A
Cited
US3523593A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-07-15 | 1978-01-14 | 1978-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-15 | 1982-01-14 | 1982-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-15 | 1986-01-14 | 1986-07-16 | $7700.00 | Window Closed / Lapsed |