US3784148A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rocker base
Assignee: Individual
•
Filing: 1972-05-15
•
Granted: 1974-01-08
•
Expires: 1992-05-15
Abstract
Abstract This is a swivel rocker base for a rocking chair. A rocker base frame is swivel mounted on a swivel base frame. A rocking trunnion comprising a steel rod is welded in horizontal position on the upper edge of a vertical plate which is mounted in diametral position on the rocker base frame. A rocker frame has a semicylindrical saddle bearing overlying the full length of the trunnion rod to support the chair. A nylon cushion is interposed as a bushing between the trunnion rod and saddle bearing. Four upstanding bolts on the rocker base frame extend upward through openings in the rocker frame, two of these bolts being on the front side of the trunnion rod and two on the rear side. Each bolt carries a coil spring compressed between a lower spring seat on the rocker frame and an upper spring seat on the upper end of the bolt whereby the springs are readily replaceable in case of breakage.
Inventors
- 👤 B Hill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:26
CPC Classifications
A; A47; A47C; A47C3/00; A47C3/02; A47C3/025
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
214 words
In a rocker base, a rocker base frame, a pair of upstanding side rlanges on opposite sides of said base frame, a transverse vertical plate welded along its lower edge to the top side of said base frame and welded at its ends to said side flanges, a trunnion rod welded along its under side to the upper edge of said transverse vertical plate, said plate supporting said rod; a rocker frame comprising a pair of side members and a pair of front and back transverse members connected at their ends to said side members, a semi-cylindrical saddle bearing welded at its ends to said side members, a non-metallic bushing element between said trunnion rod and saddle bearing, said saddle bearing supporting said rocker frame for rocking movement on substantially the full length of said trunnion rod; a pair of upstanding bolts mounted in a front part of said base frame, a pair of upstanding bolts mounted in a back part of said base frame, said bolts extending upward through holes in said transverse members of said rocker frame, lower spring seats on said transverse members concentric with said holes, upper spring seats on the upper ends of said bolts, and coil springs on said bolts compressed between said upper and lower spring seats.
Claim 2
Dependent Claim
214 words
In a rocker base, a rocker base frame, a pair of upstanding side rlanges on opposite sides of said base frame, a transverse vertical plate welded along its lower edge to the top side of said base frame and welded at its ends to said side flanges, a trunnion rod welded along its under side to the upper edge of said transverse vertical plate, said plate supporting said rod; a rocker frame comprising a pair of side members and a pair of front and back transverse members connected at their ends to said side members, a semi-cylindrical saddle bearing welded at its ends to said side members, a non-metallic bushing element between said trunnion rod and saddle bearing, said saddle bearing supporting said rocker frame for rocking movement on substantially the full length of said trunnion rod; a pair of upstanding bolts mounted in a front part of said base frame, a pair of upstanding bolts mounted in a back part of said base frame, said bolts extending upward through holes in said transverse members of said rocker frame, lower spring seats on said transverse members concentric with said holes, upper spring seats on the upper ends of said bolts, and coil springs on said bolts compressed between said upper and lower spring seats.
Claim 3
Dependent Claim
15 words
A rocker base as defined in claim 1, said bushing element comprising a fabric pad.
Claim 4
Dependent Claim
18 words
A rocker base as defined in claim 2, said fabric pad comprising a folded piece of nylon material.
Claim 5
Dependent Claim
60 words
A rocker base as defined in claim 1, said transverse members comprising channel irons and said side members comprising angle irons, said saddle bearing being welded to vertical flanges on said angle irons, and said angle irons having horizontal flanges with longitudinal slots to receive screws for mounting a chair in fore and aft adjusted position on said horizontal flanges.
Claim 6
Dependent Claim
45 words
A rocker base as defined in claim 1, said rocker base frame comprising a square horizontal plate having a circular ball race on its under side for swivel mounting on a swivel base frame, and said bolts being mounted in the corners of said plate.
Claim 7
Dependent Claim
52 words
A rocker base as defined in claim 5 including a swivel base frame, said swivel base frame comprising a horizontal plate with a circular ball race on its upper side, balls in said race supporting said rocker base frame, and legs mounted on the under side of said swivel base frame plate.
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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) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |