US3751111A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable density contour chair
Assignee: Individual
•
Filing: 1972-02-22
•
Granted: 1973-08-07
•
Expires: 1992-02-22
Abstract
Abstract A chair includes a cushion of relatively low density flexible material that captivates specially positioned blocks of relatively high and intermediate density flexible material in a manner to improve comfort and minimize certain discomforts of sitting. The relatively high and intermediate density blocks are arranged in a pattern to coincide with predetermined high and intermediate load bearing regions determined from date derived from measuring a backside area of a person or a group of people. The load is distributed so that the stronger and more sensitive prone parts of a person are subjected to proportionally greater and lesser amounts of the overall load as compared with conventional cushions of uniformly compressive material or layered materials.
Inventors
- 👤 M Taylor
- 👤 G Johnson
- 👤 H Becker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:11
CPC Classifications
A; A47; A47C; A47C27/00; A47C27/14; A47C27/142; A47C27/144; A47C27/20; A47C3/00; A47C3/12; A47C31/00; A47C31/12; A47C31/126; Y; Y10; Y10S; Y10S297/00; Y10S297/01
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
164 words
A chair comprising: a. a supporting shell; b. a cushion constructed primarily from a matrix of relatively low density flexible foam material and secured to the supporting shell, the cushion having a relatively high load bearing region, a relatively intermediate load bearing region and a relatively light load bearing region; c. a block of relatively high density flexible foam material captivated by the relatively low density flexible foam material and positioned within the relatively high load bearing region of the cushion; d. a block of relatively intermediate density flexible foam material captivated by the relatively low density foam material and positioned within the relatively intermediate load bearing region of the cushion, the relatively low density flexible foam material being distributed to occupy the relatively light load bearing region, the blocks of relatively high and intermediate density flexible foam material being specially shaped to fully occupy the relatively high and intermediate load bearing regions respectively, and oriented in side by side and generally co-planar relationship.
Claim 2
Dependent Claim
164 words
A chair comprising: a. a supporting shell; b. a cushion constructed primarily from a matrix of relatively low density flexible foam material and secured to the supporting shell, the cushion having a relatively high load bearing region, a relatively intermediate load bearing region and a relatively light load bearing region; c. a block of relatively high density flexible foam material captivated by the relatively low density flexible foam material and positioned within the relatively high load bearing region of the cushion; d. a block of relatively intermediate density flexible foam material captivated by the relatively low density foam material and positioned within the relatively intermediate load bearing region of the cushion, the relatively low density flexible foam material being distributed to occupy the relatively light load bearing region, the blocks of relatively high and intermediate density flexible foam material being specially shaped to fully occupy the relatively high and intermediate load bearing regions respectively, and oriented in side by side and generally co-planar relationship.
Claim 3
Dependent Claim
66 words
The structure according to claim 1, wherein the cushion includes: an uppeR cushion portion having a single block of high density foam material and a single block of intermediate density flexible foam material; a lower cushion portion having at least dual blocks of high density foam material and dual blocks of intermediate density foam material arranged adjacent corresponding dual blocks of high density flexible foam material.
Claim 4
Dependent Claim
33 words
The structure according to claim 2, wherein; the dual blocks of relatively intermediate density flexible foam material are formed with recesses configured to receive corresponding dual blocks of high density flexible foam material.
Claim 5
Dependent Claim
33 words
The structure according to claim 2, wherein; the upper cushion single block of intermediate density flexible foam material has a cut-out area configured to receive the single block high density flexible foam material.
Claim 6
Dependent Claim
59 words
The structure according to claim 2, wherein; the upper cushion single block of intermediate density flexible foam material has a cut-out area configured to receive the single block high density flexible foam material; the dual blocks of relatively intermediate density flexible foam material are formed with recesses configured to receive corresponding dual blocks of high density flexible foam material.
Claim 7
Dependent Claim
20 words
The structure according to claim 1, wherein; the flexible foam material is a type of polyurethane foam with self-skinning properties.
Claim 8
Dependent Claim
37 words
The structure according to claim 6, wherein; the low, intermediate and high density polyurethane foam have densities of approximately 1 1/2 pounds per cubic foot, 4 pounds per cubic foot and 6 pounds per cubic foot respectively.
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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) | 1976-08-06 | 1977-02-05 | 1977-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-06 | 1981-02-05 | 1981-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-06 | 1985-02-05 | 1985-08-07 | $7700.00 | Window Closed / Lapsed |