US3712672A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chair iron and mounting plate therefor
Assignee: Leggett and Platt Inc
•
Filing: 1971-03-08
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Granted: 1973-01-23
•
Expires: 1991-03-08
Abstract
Abstract A chair iron having a one piece mounting plate with rigid downwardly extending ears which rigidly mount a spindle bracket and pivotably mount a back rest yoke. The integrally formed mounting plate reduces material costs, weight of the chair iron, and manufacturing costs.
Inventors
- 👤 Graaf C De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:07
CPC Classifications
A; A47; A47C; A47C1/00; A47C1/02; A47C1/022; A47C1/024; A47C1/0246; A47C7/00; A47C7/36; A47C7/40; A47C7/44; A47C7/441; A47C7/443
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
193 words
A chair iron comprising: a one piece integrally formed mounting plate having a base portion for securing said chair iron to the underneath surface of a chair, a pair of downwardly extending parallel ears integrally formed with said base by bending downwardly the central portions of opposite sides of a rectangular plate, leaving indentations in said opposite sides of said rectangular plate, said ears having side portions integrally formed therewith and with said base portion, said side portions joining said base portion and extending angularly of said ears outwardly to the outer edges of said base portion, thereby bracing said ears with respect to said base portion, and means on said base portion between said ears for securely retaining a top portion of a spindLe against lateral movement with respect to said mounting plate; a bracket rigidly secured to said ears beneath said spindle retaining means for rigidly securing said spindle to said chair iron; a yoke pivotably mounted to one end portion of said ears; means biasing said yoke upwardly with respect to said mounting plate; and means on a back portion of said yoke for supporting a backrest for said chair.
Claim 2
Dependent Claim
193 words
A chair iron comprising: a one piece integrally formed mounting plate having a base portion for securing said chair iron to the underneath surface of a chair, a pair of downwardly extending parallel ears integrally formed with said base by bending downwardly the central portions of opposite sides of a rectangular plate, leaving indentations in said opposite sides of said rectangular plate, said ears having side portions integrally formed therewith and with said base portion, said side portions joining said base portion and extending angularly of said ears outwardly to the outer edges of said base portion, thereby bracing said ears with respect to said base portion, and means on said base portion between said ears for securely retaining a top portion of a spindLe against lateral movement with respect to said mounting plate; a bracket rigidly secured to said ears beneath said spindle retaining means for rigidly securing said spindle to said chair iron; a yoke pivotably mounted to one end portion of said ears; means biasing said yoke upwardly with respect to said mounting plate; and means on a back portion of said yoke for supporting a backrest for said chair.
Claim 3
Dependent Claim
41 words
A chair iron according to claim 1 wherein said biasing means comprises a bolt pivotably mounted at one end to a rear portion of said mounting plate and a spring biased between the other end of said bolt and said yoke.
Claim 4
Dependent Claim
22 words
A chair iron according to claim 2 wherein said base portion has a depression receiving the head of said biasing means bolt.
Claim 5
Dependent Claim
24 words
A chair iron according to claim 1 and further comprising means to adjust the angular relationship between said yoke and said backrest supporting means.
Claim 6
Dependent Claim
38 words
A chair iron according to claim 1 and further comprising a large opening in said base member at a front portion thereof, said opening being defined by a downwardly extending lip, thereby adding rigidity to said base member.
Claim 7
Dependent Claim
42 words
A chair iron according to claim 1 wherein said spindle retaining means on said base portion comprises a depression formed downwardly of the plane of said base member, and an aperture in said depression for receiving said top portion of said spindle.
Claim 8
Dependent Claim
27 words
A chair iron according to claim 1 wherein said side portions of said ears decrease in height from said ears to said edges of said base portion.
Claim 9
Dependent Claim
55 words
A chair having a seat, a backrest, a base, a spindle mounted on said base, and a chair iron according to claim 1 mounted on said spindle; means securing said base portion of said chair iron to a bottom surface of said chair seat; and means securing said backrest to said backrest bracket supporting means.
Claim 10
Dependent Claim
179 words
A chair iron comprising: an integral rigid mounting plate having a base portion for securing said chair iron to the underneath surface of a chair, a pair of downwardly extending parallel ears integrally formed with said base, said ears having side portions integral therewith and with said base portion, said side portions joining said base portions and extending angularly of said ears outwardly to the outer edges of said base portion, thereby bracing said ears with respect to said base portion, and means on said base portion between said ears for securely retaining a top portion of a spindle against lateral movement with respect to said mounting plate; a bracket rigidly secured to said ears beneath said spindle retaining means on said base portion, said bracket also having a spindle retaining means for rigidly securing said spindle to said chair iron; a yoke pivotably mounted to one end portion of said ears; means biasing said yoke upwardly with respect to said mounting plate; and means on a back portion of said yoke for supporting a backrest for said chair.
Claim 11
Dependent Claim
179 words
A chair iron comprising: an integral rigid mounting plate having a base portion for securing said chair iron to the underneath surface of a chair, a pair of downwardly extending parallel ears integrally formed with said base, said ears having side portions integral therewith and with said base portion, said side portions joining said base portions and extending angularly of said ears outwardly to the outer edges of said base portion, thereby bracing said ears with respect to said base portion, and means on said base portion between said ears for securely retaining a top portion of a spindle against lateral movement with respect to said mounting plate; a bracket rigidly secured to said ears beneath said spindle retaining means on said base portion, said bracket also having a spindle retaining means for rigidly securing said spindle to said chair iron; a yoke pivotably mounted to one end portion of said ears; means biasing said yoke upwardly with respect to said mounting plate; and means on a back portion of said yoke for supporting a backrest for said chair.
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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) | 1976-01-23 | 1976-07-24 | 1977-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-23 | 1980-07-24 | 1981-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-23 | 1984-07-24 | 1985-01-23 | $7700.00 | Window Closed / Lapsed |