Patent US3840205A successfully refreshed from Google Patents.
US3840205A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rocker box assemblies
Assignee: Individual
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Filing: 1973-04-09
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Granted: 1974-10-08
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Expires: 1993-04-09
Abstract
Abstract A rocker box assembly for attachment to the bottom of a chair to form a platform rocker or the like. The rocker box has swivel connection with the floor legs so that the user of the chair may not only rock but also swing about the legs. The improvement comprises an assembly formed mostly of steel stampings to facilitate quantity production. The interengaging rocker components are rigidly secured to superposed steel plates, and side plates are provided to insure proper alignment of the rocker components, and to prevent undesirable matter from being inserted between the rocker surfaces. A novel coil spring assembly maintains the rocker components in cooperating relationship and safety means are provided to insure against bodily harm in the event of failure of the coil spring assembly.
Inventors
- 👤 J Faull
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:47
CPC Classifications
A; A47; A47C; A47C3/00; A47C3/02
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
210 words
A rocker box assembly for disposition between the seat and base of a chair and the like, comprising: a pair of generally flat metal support plates, superposed in spaced relation, the upper support plate being adapted for connection to the chair seat and the lower plate being adapted foR connection to the chair base, two laterally spaced rocker means between said upper and lower plates, each rocker means comprising a first rocker member secured to and depending from said upper support plate and having a lower longitudinally convex rocker surface, and a second rocker member secured to and extending upwardly from said lower support plate and having an upper longitudinally convex surface engaging and cooperable with said lower convex surface, said lower convex surface being adapted to rock over said upper convex surface, and a side guard disposed outwardly of each of said first and second rocker members, each side guard being connected to and depending from said upper support plate and extending short of said lower support plate so as not to interfere with rocking movement, each side guard overlapping substantially the full length of the engaging parts of said lower and upper convex surfaces to prevent disposition of foreign matter between the same in any normal rocking position.
Claim 2
Dependent Claim
210 words
A rocker box assembly for disposition between the seat and base of a chair and the like, comprising: a pair of generally flat metal support plates, superposed in spaced relation, the upper support plate being adapted for connection to the chair seat and the lower plate being adapted foR connection to the chair base, two laterally spaced rocker means between said upper and lower plates, each rocker means comprising a first rocker member secured to and depending from said upper support plate and having a lower longitudinally convex rocker surface, and a second rocker member secured to and extending upwardly from said lower support plate and having an upper longitudinally convex surface engaging and cooperable with said lower convex surface, said lower convex surface being adapted to rock over said upper convex surface, and a side guard disposed outwardly of each of said first and second rocker members, each side guard being connected to and depending from said upper support plate and extending short of said lower support plate so as not to interfere with rocking movement, each side guard overlapping substantially the full length of the engaging parts of said lower and upper convex surfaces to prevent disposition of foreign matter between the same in any normal rocking position.
Claim 3
Dependent Claim
72 words
The construction according to claim 1 wherein each of said upper and lower rocker members is formed of metal and is generally of channel shape in transverse section, including a web and legs extending at right angles from opposite ends of said web, one leg being rectilinear in longitudinal section and secured to its respective support plate and the other leg being arcuate in longitudinal section to provide the convex rocker surface.
Claim 4
Dependent Claim
47 words
The construction according to claim 2 wherein the rocker members of each rocker means have their webs in vertical alignment, each side guard comprising a flat metal rigidly connected to and depending from said upper support plate in closely spaced relation with respect to the aligned webs.
Claim 5
Dependent Claim
29 words
The construction according to claim 3 and further including slide bearing means between facing surfaces of each side guard plate and the web of a related lower rocker member.
Claim 6
Dependent Claim
50 words
The construction according to claim 4 wherein each slide bearing means comprises a headed plastic stud, the shank of said stud being fixed in a hole in said side guard plate and the head of said stud having sliding engagement with the web surface of a related lower rocker member.
Claim 7
Dependent Claim
184 words
A rocker box assembly for disposition between the seat and base of a chair and the like, comprising: a pair of generally flat metal support plates, superposed in spaced relation, the upper support plate being adapted for connection to the chair seat and the lower plate being adapted for connection to the chair base, two laterally spaced rocker means between said upper and lower plates, each rocker means comprising a first rocker member secured to and depending from said upper support plate and having a lower longitudinally convex rocker surface, and a second rocker member secured to and extending upwardly from said lower support plate and having an upper longitudinally convex surface engaging and cooperable with said lower convex surface, said lower convex surface being adapted to rock over said upper convex surface, a plurality of coil springs between said upper and lower support plates, providing means for holding said plates in assembled relation and for holding said convex surfaces in rocking engagement, and means operative in the event of spring failure for holding said support plates and said convex surfaces against material separation.
Claim 8
Dependent Claim
184 words
A rocker box assembly for disposition between the seat and base of a chair and the like, comprising: a pair of generally flat metal support plates, superposed in spaced relation, the upper support plate being adapted for connection to the chair seat and the lower plate being adapted for connection to the chair base, two laterally spaced rocker means between said upper and lower plates, each rocker means comprising a first rocker member secured to and depending from said upper support plate and having a lower longitudinally convex rocker surface, and a second rocker member secured to and extending upwardly from said lower support plate and having an upper longitudinally convex surface engaging and cooperable with said lower convex surface, said lower convex surface being adapted to rock over said upper convex surface, a plurality of coil springs between said upper and lower support plates, providing means for holding said plates in assembled relation and for holding said convex surfaces in rocking engagement, and means operative in the event of spring failure for holding said support plates and said convex surfaces against material separation.
Claim 9
Dependent Claim
213 words
The construction according to claim 6 wherein each of said upper and lower rocker members is formed of metal and is generally of channel shape in transverse section, including a web and legs extending at right angles from opposite ends of said web, one leg being rectilinear in longitudinal section and secured to its respective support plate and the other leg being arcuate in longitudinal section to provide the convex rocker surface, the rocker members of each rocker means having their webs in vertical alignment, a side guard disposed outwardly of each of said first and second rocker members, each side guard comprising a fLat plate rigidly connected to and depending from said upper support plate in closely spaced relation with respective aligned webs, the last named means in claim 20 comprising a stud secured to a side guard plate to coincide with a central position of the cooperating lower and upper convex surfaces, said stud having its shank fitting into an oversized hole in the web of the related lower rocker member, whereby free rocking of said lower convex surface over said upper convex surface is permitted, but whereby the stud shank engages a margin of the hole in the web of the related rocker member in the event of spring failure.
Claim 10
Dependent Claim
183 words
A rocker box assembly for disposition between the seat and base of a chair and the like, comprising: a pair of support plates, superposed in spaced relation, the upper support plate being adapted for connection to the chair seat and the lower support plate being adapted for connection to the chair base, rocker means between said plates so that the latter may rock relative to each other, and coil springs connected between said plates to yieldably oppose relative rocking movement of said support plates, the spring connection comprising a semi-circular recess in a marginal portion of a plate and a semicircular projection concentric within said recess and tapering from a larger size at the bottom of said recess to a smaller size at the top, said projection having a cam face at the marginal portion of said plate and being engageable with an end convolution of a coil and operable, upon application of lateral force to said end convolution to spring it apart from an adjoining convolution sufficiently to permit said end convolution to ride over said projection and snap into said recess.
Claim 11
Dependent Claim
183 words
A rocker box assembly for disposition between the seat and base of a chair and the like, comprising: a pair of support plates, superposed in spaced relation, the upper support plate being adapted for connection to the chair seat and the lower support plate being adapted for connection to the chair base, rocker means between said plates so that the latter may rock relative to each other, and coil springs connected between said plates to yieldably oppose relative rocking movement of said support plates, the spring connection comprising a semi-circular recess in a marginal portion of a plate and a semicircular projection concentric within said recess and tapering from a larger size at the bottom of said recess to a smaller size at the top, said projection having a cam face at the marginal portion of said plate and being engageable with an end convolution of a coil and operable, upon application of lateral force to said end convolution to spring it apart from an adjoining convolution sufficiently to permit said end convolution to ride over said projection and snap into said recess.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-07 | 1978-04-08 | 1978-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-07 | 1982-04-08 | 1982-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-07 | 1986-04-08 | 1986-10-08 | $7700.00 | Window Closed / Lapsed |