US4077088A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two wheel castor particularly for furniture
Assignee: Individual
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Filing: 1976-09-17
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Granted: 1978-03-07
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Expires: 1996-09-17
Abstract
Abstract A castor for items of furniture has two coaxial wheels and comprises a cowling having the shape of a tubular horizontal axis half cylinder subdivided by a diaphragm perpendicular to the cowling. Each wheel is provided with an axial tubular tail piece of snap-action engageable with and freely pivotable in a sort of annular resilient clamp formed frontally to the diaphragm.
Inventors
- 👤 Francescantonio Melara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 06:16
CPC Classifications
B; B60; B60B; B60B33/00; B60B33/0036; B60B33/0042; B60B33/0028
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
199 words
A castor of the kind comprising a vertical wall, a cylindrical seat formed in said wall perpendicularly thereto and defining front bushings on both sides of said wall, a spindle rotatably supported in said seat and having its opposite ends projecting out of said seat on both sides thereof, a pair of wheels secured on said opposite ends and having tubular hub portions provided with outer collars close to said front bushings, a sleeve formed in said wall in the same plane thereof and perpendicular to and laterally offset from said spindle for rotatably supporting a pivot pin adapted to be located in a vertical socket of the article to which the castor is to be fitted, a plurality of hook members provided on both sides of said wall and concentrically arranged around said spindle so as to define regular interspaces, said hook members having inwardly projecting lips engaging said collars for axially retaining said wheels, wherein according to the improvement between adjacent hook members tabs are provided axially extending from both sides of said wall and such as to close the interspaces existing between said adjacent hook members, the free ends of said tabs projecting above said collars.
Claim 2
Dependent Claim
199 words
A castor of the kind comprising a vertical wall, a cylindrical seat formed in said wall perpendicularly thereto and defining front bushings on both sides of said wall, a spindle rotatably supported in said seat and having its opposite ends projecting out of said seat on both sides thereof, a pair of wheels secured on said opposite ends and having tubular hub portions provided with outer collars close to said front bushings, a sleeve formed in said wall in the same plane thereof and perpendicular to and laterally offset from said spindle for rotatably supporting a pivot pin adapted to be located in a vertical socket of the article to which the castor is to be fitted, a plurality of hook members provided on both sides of said wall and concentrically arranged around said spindle so as to define regular interspaces, said hook members having inwardly projecting lips engaging said collars for axially retaining said wheels, wherein according to the improvement between adjacent hook members tabs are provided axially extending from both sides of said wall and such as to close the interspaces existing between said adjacent hook members, the free ends of said tabs projecting above said collars.
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) | 1981-03-06 | 1981-09-05 | 1982-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-06 | 1985-09-05 | 1986-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-06 | 1989-09-05 | 1990-03-07 | $7700.00 | Window Closed / Lapsed |