US3628780A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seat frame structure
Assignee: Individual
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Filing: 1969-07-17
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Granted: 1971-12-21
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Expires: 1989-07-17
Abstract
Abstract A seat frame structure composed of sinuous spring and a frame therefor comprising at least two opposed frame members. One of said frame members is of generally L-shaped cross section, one arm of the L having a turned over part with at least two openings for restraining an end of a sinuous spring. The other opposing frame member has at least one formation for stopping the other end of the sinuous spring the one end of which has been already fixed.
Inventors
- 👤 Nobuyoshi Saito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:19
CPC Classifications
A; A47; A47C; A47C31/00; A47C31/02; A47C31/04; A47C31/06
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
101 words
A frame member for retaining a sinuous spring comprising an angle member having one edge turned over to form a longitudinally extending turned over projection having an inner diameter or width equal to the wire diameter of the sinuous spring, and a pair of spaced openings provided in said projection, said projection being such that the substantially straight portion at the terminal end of sinuous spring is received by the inner surface portion of said projection lying between said openings while the parts of the sinuous spring adjacent to its sinuous portion are received by the respective edges of said openings.
Claim 2
Dependent Claim
101 words
A frame member for retaining a sinuous spring comprising an angle member having one edge turned over to form a longitudinally extending turned over projection having an inner diameter or width equal to the wire diameter of the sinuous spring, and a pair of spaced openings provided in said projection, said projection being such that the substantially straight portion at the terminal end of sinuous spring is received by the inner surface portion of said projection lying between said openings while the parts of the sinuous spring adjacent to its sinuous portion are received by the respective edges of said openings.
Claim 3
Dependent Claim
92 words
A seat frame structure comprising two frame member in the form of angle members and a sinuous spring extending between and having an end connected to each angle member, a turned over portion formed on each frame member by turning over one end edge of said angle member so that its top portion has a substantially semicircular section, a pair of spaced openings formed in said top portion, at least one of said openings being formed to have a depressed bottom portion receiving the undersurface of an end of said sinuous spring.
Claim 4
Dependent Claim
92 words
A seat frame structure comprising two frame member in the form of angle members and a sinuous spring extending between and having an end connected to each angle member, a turned over portion formed on each frame member by turning over one end edge of said angle member so that its top portion has a substantially semicircular section, a pair of spaced openings formed in said top portion, at least one of said openings being formed to have a depressed bottom portion receiving the undersurface of an end of said sinuous spring.
Claim 5
Dependent Claim
155 words
A seat frame structure comprising a first frame member in the form of an angle member, a turned over portion formed on said first frame member by turning over one end edge of said angle member so that its top portion has a substantially semicircular section, a pair of spaced slots formed in said top portion, each said slot having a shoulder at its lower end edge, a sinuous spring having one terminal end retained by said turned over portion said turned over portion having an inner diameter or width substantially equal to the wire diameter of said sinuous spring, a second frame member in the form of a U-shaped member for retaining the other terminal end of the sinuous spring, said U-shaped member having a hook portion projecting from its upper end edge and bent downwardly and then upwardly and retaining the straight portion of the other terminal end of the sinuous spring thereby.
Claim 6
Dependent Claim
155 words
A seat frame structure comprising a first frame member in the form of an angle member, a turned over portion formed on said first frame member by turning over one end edge of said angle member so that its top portion has a substantially semicircular section, a pair of spaced slots formed in said top portion, each said slot having a shoulder at its lower end edge, a sinuous spring having one terminal end retained by said turned over portion said turned over portion having an inner diameter or width substantially equal to the wire diameter of said sinuous spring, a second frame member in the form of a U-shaped member for retaining the other terminal end of the sinuous spring, said U-shaped member having a hook portion projecting from its upper end edge and bent downwardly and then upwardly and retaining the straight portion of the other terminal end of the sinuous spring thereby.
Claim 7
Dependent Claim
65 words
A seat frame member comprising an angle member having a turned over portion formed thereon by turning over one edge thereof so that its top portion has a substantially semicircular section, a pair of spaced openings in said top portion, at least one of said openings being formed to have a depressed bottom portion for receiving the undersurface of an end of a sinuous spring.
Claim 8
Dependent Claim
65 words
A seat frame member comprising an angle member having a turned over portion formed thereon by turning over one edge thereof so that its top portion has a substantially semicircular section, a pair of spaced openings in said top portion, at least one of said openings being formed to have a depressed bottom portion for receiving the undersurface of an end of a sinuous spring.
Claim 9
Dependent Claim
24 words
The seat frame member as claimed in claim 4 wherein both of said pair of spaced openings are formed to have depressed bottom portions.
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) | 1974-12-20 | 1975-06-21 | 1975-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-20 | 1979-06-21 | 1979-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-20 | 1983-06-21 | 1983-12-21 | $7700.00 | Window Closed / Lapsed |