Patent US3807797A successfully refreshed from Google Patents.
US3807797A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seat construction
Assignee: KEIPER F DT
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Filing: 1972-07-17
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Granted: 1974-04-30
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Expires: 1992-07-17
Abstract
Abstract A seat member and backrest member are connected by mounting means mounting the latter on the former with freedom of angular displacement relative thereto. The mounting means includes a ring gear on one of the members and having inwardly directed teeth, and a spur gear provided on the other member received within the ring gear and having outwardly directed teeth which mesh with those of the ring gear. The outer diameter of the spur gear is smaller than the root diameter of the ring gear by at least the height of one tooth and of the number of inwardly directed teeth differ from the number of outwardly directed teeth by at least one. An internal chamber is provided in one of the gears and a journalling member is accommodated with radial clearance in the chamber and movable radially therein. It is smaller than the interior dimension of the chamber by at least the difference between the diameters of the gears. A pivot is provided on one of the gears and has a portion journalled in the journalling element. A selectively operable locking arrangement is provided, including a plurality of wedge-shaped locking elements located in the chamber in the radial clearance and a handle is provided for effecting movement of the locking elements between locking and unlocking positions.
Inventors
- 👤 F Klingelhofer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:47
CPC Classifications
B; B60; B60N; B60N2/00; B60N2/02; B60N2/22; B60N2/225; B60N2/2252; B60N2/2227
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
270 words
A seat, particularly for automotive vehicles, comprising a seat member; a backrest member; mounting means mounting said backrest member on said seat member with freedon of angular displacement relative thereto, said mounting means including a ring gear provided on one of said members and having inwardly directed teeth, a spur gear provided on the other of said members received within said ring gear and having outwardly directed teeth meshing with said inwardly directed teeth, said spur gear having an outer diameter which is smaller than the root diameter of said ring gear by at least the height of one tooth and the number of inwardly directed teeth differing from the number of outwardly directed teeth by at least one; an internal chamber provided in one of said gears; a journalling member accommodated with radial clearance in said chamber and movable radially therein, said journalling member being smaller than the interior dimension of said chamber by at least the difference between the diameters of said gears; pivot means rigid with the other of said gears and having a portion journalled in said journalling element for movement therewith; selectively operable locking means including a plurality of wedge-shaped locking elements located in said radial clearance and normally engaging said journalling element for preventing radial movement of the same and relative angular displacement of said gears; and actuating means connected with said locking elements for displacing the same in said clearance to an unlocking position in which said locking elements are out of engagement with said journalling element so as to permit radial movement of the same and relative angular displacement of said gears.
Claim 2
Dependent Claim
270 words
A seat, particularly for automotive vehicles, comprising a seat member; a backrest member; mounting means mounting said backrest member on said seat member with freedon of angular displacement relative thereto, said mounting means including a ring gear provided on one of said members and having inwardly directed teeth, a spur gear provided on the other of said members received within said ring gear and having outwardly directed teeth meshing with said inwardly directed teeth, said spur gear having an outer diameter which is smaller than the root diameter of said ring gear by at least the height of one tooth and the number of inwardly directed teeth differing from the number of outwardly directed teeth by at least one; an internal chamber provided in one of said gears; a journalling member accommodated with radial clearance in said chamber and movable radially therein, said journalling member being smaller than the interior dimension of said chamber by at least the difference between the diameters of said gears; pivot means rigid with the other of said gears and having a portion journalled in said journalling element for movement therewith; selectively operable locking means including a plurality of wedge-shaped locking elements located in said radial clearance and normally engaging said journalling element for preventing radial movement of the same and relative angular displacement of said gears; and actuating means connected with said locking elements for displacing the same in said clearance to an unlocking position in which said locking elements are out of engagement with said journalling element so as to permit radial movement of the same and relative angular displacement of said gears.
Claim 3
Dependent Claim
19 words
A seat as defined in claim 1, wherein said chamber and said journalling element, respectively, are of polygonal outline.
Claim 4
Dependent Claim
30 words
A seat as defined in claim 2, said locking elements being displaceable in circumferential direction of said chamber and having inclined wedge faces which are directed towards said journalling element.
Claim 5
Dependent Claim
27 words
A seat as defined in claim 1, said locking means comprising at least two of said locking elements which are arranged for displacement in mutually normal direction.
Claim 6
Dependent Claim
89 words
A seat as defined in claim 1, further comprising wall means partially bounding said chamber and having an outer side, said wall means being provided with guide slots open to said chamber and to said outer side; said locking elements each comprising at least one projection which extends into a respective guide slot and outwardly beyond said outer side; and wherein said actuating means includes a turnable element located at said outer side and having respective arms each of which engages one of said projections at said outer sides.
Claim 7
Dependent Claim
82 words
A seat as defined in claim 5, said locking elements each being movable between a first and a second position in which they respectively prevent and permit relative angular displacement of said gears; further comprising biasing means acting upon the respective projections for urging the associated locking elements to said first positions thereof; and wherein said arms of said turnable element are operative for displacing said locking elements to said second positions thereof in response to requisite turning of said turnable element.
Claim 8
Dependent Claim
43 words
A seat as defined in claim 5, further comprising a pin carried by said wall means and extending centrically with reference to said locking elements; and wherein said turnable element is mounted on said pin for turning movement about the longitudinal axis thereof.
Claim 9
Dependent Claim
40 words
A seat as defined in claim 7, said turnable element comprising two interengaging components mounted adjacent one another on said pin, one of said components being provided with an engaging handle and the other of said components having said arms.
Claim 10
Dependent Claim
69 words
A seat as defined in claim 6, said biasing means being volute springs each having a convoluted center portion and a pair of arm portions extending from said center portion, one of said arm portions of each of said springs abutting one of said projections; further comprising stud portions received in the respective coiled end portion; and fixed abutment portions each engaging the other arm of the respective spring.
Claim 11
Dependent Claim
52 words
A seat as defined in claim 6, said ring gear including a plate portion provided with said chamber, and said chamber having two opposite oben sides, said spur gear extending across and closing one of said sides; and further comprising a cover plate extending across and closing the other of said sides.
Claim 12
Dependent Claim
69 words
A seat as defined in claim 9, said ring gear including a plate portion provided with said chamber, and said chamber having two opposite open sides; spur gear extending across and closing one of said sides; further comprising a cover plate extending across and closing the other of said sides; and wherein said stud portions connect said plate portion, said ring gear and said cover plate with one another.
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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) | 1977-04-29 | 1977-10-29 | 1978-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-29 | 1981-10-29 | 1982-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-29 | 1985-10-29 | 1986-04-30 | $7700.00 | Window Closed / Lapsed |