US3749442A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seat having relatively adjustable sections
Assignee: Individual
•
Filing: 1971-08-30
•
Granted: 1973-07-31
•
Expires: 1991-08-30
Abstract
Abstract A seat assembly having a base and two complementary seat elements supported thereon for individual yieldingly resisted universal tilting movement to accommodate to different positions of a user''s body. The seat elements have recesses or apertures offset rearwardly from the universal connections for receiving the ischial tuberosity bones of the user, and the back of the seat has a localized recess for partial reception of the lumbar portion of the user''s backbone. A peripheral upturned flange may be provided on the base in a relation enabling use of the assembly as a portable unit, to be removably positioned on a chair or the like, with the shiftable seat elements then being held by the flange against interfering contact with the chair. At the forward edges of the two shiftable seat elements, the assembly may be constructed to provide a more cushioned or yielding support than at other locations.
Inventors
- 👤 J Berg
- 👤 L Eames
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:48
CPC Classifications
A; A47; A47C; A47C7/00; A47C7/02; A47C7/021; A47C7/029; A47C7/14
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
92 words
A seat comprising a base, two complementary seat elements positioned above the base, two universal connections mounting said seat elements for universal tilting movement relative to the base, and cushioning material interposed between said base and said seat elements and contacting said seat elements across part but not all of their horizontal extents and yieldingly resisting said universal tilting movement, said seat elements containing air circulation apertures providing communication between the upper side and underside of the seat elements at locations where the seat elements are not contacted by said cushioning material.
Claim 2
Dependent Claim
92 words
A seat comprising a base, two complementary seat elements positioned above the base, two universal connections mounting said seat elements for universal tilting movement relative to the base, and cushioning material interposed between said base and said seat elements and contacting said seat elements across part but not all of their horizontal extents and yieldingly resisting said universal tilting movement, said seat elements containing air circulation apertures providing communication between the upper side and underside of the seat elements at locations where the seat elements are not contacted by said cushioning material.
Claim 3
Dependent Claim
51 words
A seat as recited in claim 1, in which said cushioning material contacts each of the seat elements along a region extending essentially about but spaced from the corresponding universal connection, said apertures being formed in the seat elements at locations between said universal connections and the cushioning material extending thereabout.
Claim 4
Dependent Claim
107 words
A seat comprising a base structure, two complementary seat elements supported above the base structure in side-by-side relation; and two universal connections mounting said seat elements respectively for individual universal tilting movement relative to said base structure; said two seat elements having respectively two localized regions at locations to receive the ischial tuberosity bones of a user and constructed to allow projection of the user''s body downwardly farther at said regions than at other adjacent locations; said universal connections having their centers located forwardly of, and spaced farther apart than, the portions of said two localized regions at which the tuberosity bones can project downwardly the farthest.
Claim 5
Dependent Claim
107 words
A seat comprising a base structure, two complementary seat elements supported above the base structure in side-by-side relation; and two universal connections mounting said seat elements respectively for individual universal tilting movement relative to said base structure; said two seat elements having respectively two localized regions at locations to receive the ischial tuberosity bones of a user and constructed to allow projection of the user''s body downwardly farther at said regions than at other adjacent locations; said universal connections having their centers located forwardly of, and spaced farther apart than, the portions of said two localized regions at which the tuberosity bones can project downwardly the farthest.
Claim 6
Dependent Claim
72 words
A seat as recited in claim 3, in which said portions of said localized regions at which the tuberosity bones can project downwardly the farthest are spaced apart laterally between about 3 1/2 and 5 1/2 inches, and are spaced rearwardly of said centers of the universal connections between about 2 and 3 1/2 inches; and said centers of the universal connections are spaced apart laterally between about 5 and 7 inches.
Claim 7
Dependent Claim
28 words
A seat as recited in claim 3, including means between said base structure and both of said seat elements yieldingly resisting said universal tilting movement of the latter.
Claim 8
Dependent Claim
34 words
A seat as recited in claim 3, in which said localized regions form two recesses extending downwardly in the seat elements respectively and beneath other adjacent portions of the seat element about said regions.
Claim 9
Dependent Claim
24 words
A seat as recited in claim 3, in which said seat elements contain two openings at said localized regions for receiving the tuberosity bones.
Claim 10
Dependent Claim
19 words
A seat as recited in claim 7, in which said seat elements are slightly recessed downwardly about said openings.
Claim 11
Dependent Claim
34 words
A seat as recited in claim 8, including cushioning material between said base structure and said seat elements yieldingly resisting said universal tilting movement thereof and having portions at the locations of said openings.
Claim 12
Dependent Claim
34 words
A seat as recited in claim 7, including cushioning material between said base structure and said seat elements yieldingly resisting said universal tilting movement thereof and having portions at the locations of said openings.
Claim 13
Dependent Claim
119 words
A seat as recited in claim 3, including resilient cushioning material between said base structure and said elements yieldingly resisting said universal tilting movement of the elements, said seat elements having recesses extending downwardly at said localized regions beneath the level of adjacent portions of the seat elements which are disposed about said regions and portions located above said universal connections, said recesses in the two seat elements having their centers located between about 3 1/2 047150180 and 5 1/2 inches apart, said universal connections having their centers located between about 5 and 7 inches apart and being offset forwardly between about 2 and 3 1/2 inches from a vertical transverse plane containing the deepest portions of said recesses.
Claim 14
Dependent Claim
112 words
A portable seat assembly having a base adapted to be placed on and be supported by an underlying chair or seat structure, two complementary seat elements positioned above said base in side-by-side relation, two universal connections mounting said seat elements to the base for independent universal tilting movement, means between the base and said two seat elements yieldingly resisting said tilting movement, and a flange projecting upwardly from an edge of said base at a location beyond an edge of one of said seat elements in a relation to hold said edge of the seat element out of contact with an adjacent upwardly projecting portion of an underlying chair or seat structure.
Claim 15
Dependent Claim
112 words
A portable seat assembly having a base adapted to be placed on and be supported by an underlying chair or seat structure, two complementary seat elements positioned above said base in side-by-side relation, two universal connections mounting said seat elements to the base for independent universal tilting movement, means between the base and said two seat elements yieldingly resisting said tilting movement, and a flange projecting upwardly from an edge of said base at a location beyond an edge of one of said seat elements in a relation to hold said edge of the seat element out of contact with an adjacent upwardly projecting portion of an underlying chair or seat structure.
Claim 16
Dependent Claim
26 words
A portable seat assembly as recited in claim 12, in which said flange extends forwardly along an outer side edge of one of said seat elements.
Claim 17
Dependent Claim
24 words
A portable seat assembly as recited in claim 12, in which said flange extends across a back side of both of said seat elements.
Claim 18
Dependent Claim
39 words
A portable seat assembly as recited in claim 12, in which said base carries a flange as recited extending across the back sides of both of said seat elements and extending forwardly along outer edges of both seat elements.
References Cited (Backward Citations)
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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) | 1976-07-30 | 1977-01-29 | 1977-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-30 | 1981-01-29 | 1981-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-30 | 1985-01-29 | 1985-07-31 | $7700.00 | Window Closed / Lapsed |