Patent US4003564A successfully refreshed from Google Patents.
US4003564A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means mounting torsion springs
Assignee: Leggett and Platt Inc
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Filing: 1975-09-04
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Granted: 1977-01-18
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Expires: 1995-09-04
Abstract
Abstract A torsion spring assembly in which the means for mounting the bail portion of the torsion spring to a supporting frame comprises an elongate strip having a bore extending lengthwise therethrough dimensioned to receive the bail portion in seated relation therein, an entrant portion communicating with the bore for guiding the bail into the bore, and slots extending crosswise in the strip spaced one from the other longitudinally in a pair to correspond with the spaced relation between the bar supporting side arms of the torsion spring.
Inventors
- 👤 George E. Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:12
CPC Classifications
F; F16; F16F; F16F1/00; F16F1/02; F16F1/14; F16F1/16; A; A47; A47C; A47C23/00; A47C23/04; A47C23/05
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
200 words
In a torsion spring assembly, a torsion spring formed of spring wire having a pair of U-shaped members angularly disposed relative to each other and integrally joined at their inner ends by looped portions and means mounting a plurality of said U-shaped members in longitudinally spaced relation onto a support comprising an elongate strip, a lengthwise extending bore within said strip having a cross section dimensioned to receive the bail portion of said U-shaped members, a slot extending from the upper surface of the strip to the bore with the portion of the slot adjacent the bore having a width less than the cross section of the wire of the bail portion whereby the bail portion can be inserted through the slot into the bore and is retained within said bore when in the assembled relation, spaced pairs of cutouts extending crosswise through the bore and the cutout in each pair being spaced longitudinally by an amount corresponding to the spaced relation between the arms of the U-shaped member whereby the arms are crosswise aligned with said cutout portions when the bail portion is in position of assembly within the bore, and means for securing the strip to a support.
Claim 2
Dependent Claim
200 words
In a torsion spring assembly, a torsion spring formed of spring wire having a pair of U-shaped members angularly disposed relative to each other and integrally joined at their inner ends by looped portions and means mounting a plurality of said U-shaped members in longitudinally spaced relation onto a support comprising an elongate strip, a lengthwise extending bore within said strip having a cross section dimensioned to receive the bail portion of said U-shaped members, a slot extending from the upper surface of the strip to the bore with the portion of the slot adjacent the bore having a width less than the cross section of the wire of the bail portion whereby the bail portion can be inserted through the slot into the bore and is retained within said bore when in the assembled relation, spaced pairs of cutouts extending crosswise through the bore and the cutout in each pair being spaced longitudinally by an amount corresponding to the spaced relation between the arms of the U-shaped member whereby the arms are crosswise aligned with said cutout portions when the bail portion is in position of assembly within the bore, and means for securing the strip to a support.
Claim 3
Dependent Claim
47 words
A spring assembly as claimed in claim 1 in which the means for securing the strip to a support comprises a tongue and groove arrangement with the tongue in one of said members and the groove in the other to receive the tongue in seated relation therein.
Claim 4
Dependent Claim
27 words
A torsion spring assembly as claimed in claim 1 which includes a frame and in which the support comprises an elongate strip member secured to the frame.
Claim 5
Dependent Claim
46 words
A torsion spring assembly as claimed in claim 1 in which the bail portion adapted to be received in the bore of the strip in the assembled relation comprises short lengths of wire turned inwardly from the ends of the opposite arms of the U-shaped portion.
Claim 6
Dependent Claim
31 words
A torsion spring assembly as claimed in claim 1 in which the slot extending to the bore is of trapezoidal shape in cross section with the base of larger dimension outermost.
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) | 1980-01-18 | 1980-07-19 | 1981-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-18 | 1984-07-19 | 1985-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-18 | 1988-07-19 | 1989-01-18 | $7700.00 | Window Closed / Lapsed |