US3659897A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seat construction
Assignee: Individual
•
Filing: 1970-09-21
•
Granted: 1972-05-02
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Expires: 1990-09-21
Abstract
Abstract A seat member is hinged to a base member and a plurality of springs are located between the members to resiliently urge them apart. Each spring is made of two counterposed leaf portions joined together at one end and secured to one of the members at the other end. The springs are arranged so that the spring force increases as the seat member moves downwardly, and vice versa.
Inventors
- 👤 John Dale Wright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:21
CPC Classifications
A; A47; A47C; A47C7/00; A47C7/36; A47C7/40; A47C7/44; A47C7/445; A47C7/02; A47C7/14; A61; A61G; A61G5/00; A61G5/10; A61G5/14; Y; Y10; Y10S; Y10S297/00; Y10S297/10
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
177 words
In a seat construction including a base member, a seat member, and means swingably connecting the members at the front side thereof, the improvement comprising: spring means located between the members for urging the seat member from a lower position adjacent the base member to a raised position at an angle to the base member, the spring means including two counterposed arcuate leaf springs each having front and rear ends, means securing each rear end to a respective one of the members, means securing the front ends of the leaf springs to each other at about a point on the bisector of the angle between the members, and said counterposed leaf springs being capable of lying generally flat against each other along substantially their entire length when the seat member is at its lower position, whereby the seat member can move to the lower position under weight of an occupant while the leaf springs flatten against each other between the members, and to the raised position under the force of the springs when the weight is removed.
Claim 2
Dependent Claim
177 words
In a seat construction including a base member, a seat member, and means swingably connecting the members at the front side thereof, the improvement comprising: spring means located between the members for urging the seat member from a lower position adjacent the base member to a raised position at an angle to the base member, the spring means including two counterposed arcuate leaf springs each having front and rear ends, means securing each rear end to a respective one of the members, means securing the front ends of the leaf springs to each other at about a point on the bisector of the angle between the members, and said counterposed leaf springs being capable of lying generally flat against each other along substantially their entire length when the seat member is at its lower position, whereby the seat member can move to the lower position under weight of an occupant while the leaf springs flatten against each other between the members, and to the raised position under the force of the springs when the weight is removed.
Claim 3
Dependent Claim
29 words
The combination of claim 1 including means for limiting movement of the seat member away from the base member under urging of the spring means to the raised position.
Claim 4
Dependent Claim
38 words
The combination of claim 2 wherein the last-mentioned means limits the movement of the seat member to the raised position at an acute angle to the base member thereby positioning the seat member for contact by an occupant.
Claim 5
Dependent Claim
117 words
A seat construction including a base member, a seat member, means swingably connecting the members at the front side thereof for movement of the seat member between a raised position and a lower position adjacent the base member, leaf spring means operatively connected to the members for resiliently urging the seat member to its raised position, the leaf spring means having an effective length which shortens as the seat member moves to the lower position for increasing the force of said urging as the seat member moves toward its lower position, so that the force is at a maximum when the seat member is in its lower position and at a minimum when in its raised position.
Claim 6
Dependent Claim
117 words
A seat construction including a base member, a seat member, means swingably connecting the members at the front side thereof for movement of the seat member between a raised position and a lower position adjacent the base member, leaf spring means operatively connected to the members for resiliently urging the seat member to its raised position, the leaf spring means having an effective length which shortens as the seat member moves to the lower position for increasing the force of said urging as the seat member moves toward its lower position, so that the force is at a maximum when the seat member is in its lower position and at a minimum when in its raised position.
Claim 7
Dependent Claim
80 words
A seat construction as set forth in claim 4 wherein the leaf spring means includes two counterposed portions joined together adjacent the front thereof and at a location between the members, each portion having a rear end attached to one of the members adjacent the rear thereof, and the counterposed portions so constructed and arranged that they lie generally flat against each other between the members along substantially their entire length when the seat member is at its lower position.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-02 | 1975-11-01 | 1976-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-02 | 1979-11-01 | 1980-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-02 | 1983-11-01 | 1984-05-02 | $7700.00 | Window Closed / Lapsed |