US3699609A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spring loaded caster for shop tools, bar stools and the like
Assignee: Individual
•
Filing: 1971-04-12
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Granted: 1972-10-24
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Expires: 1991-04-12
Abstract
Abstract An improved caster for the bottom of a stool or other furniture item, the caster comprising a casing containing a compression spring which bears adjustably against a spherical steel ball engaging a floor or supporting surface.
Inventors
- 👤 William L Spatz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:34
CPC Classifications
B; B60; B60B; B60B33/00; B60B33/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
164 words
In a caster for stools and the like, the combination of a case, a rotatable ball supported on a lower end of said case for engaging a supporting floor, means for securement to a lower end of a stool leg, and means for frictional adjustable to control the rollability of said ball on said floor, wherein said securement means to said stool leg comprises a shaft secured to said leg, said shaft extending through an opening in an upper end wall of said case, a compression spring bearing against a bottom face of said shaft and at its opposite end bearing against a block fitted over said ball, and said adjustable means comprising a set screw in said case securable against a side of said shaft, wherein said block has a conical wall, said case has a plurality of radial, threaded openings selectively receiving a screw adjustably engaging said conical wall of said block for providing angular force by said spring against said ball.
Claim 2
Dependent Claim
164 words
In a caster for stools and the like, the combination of a case, a rotatable ball supported on a lower end of said case for engaging a supporting floor, means for securement to a lower end of a stool leg, and means for frictional adjustable to control the rollability of said ball on said floor, wherein said securement means to said stool leg comprises a shaft secured to said leg, said shaft extending through an opening in an upper end wall of said case, a compression spring bearing against a bottom face of said shaft and at its opposite end bearing against a block fitted over said ball, and said adjustable means comprising a set screw in said case securable against a side of said shaft, wherein said block has a conical wall, said case has a plurality of radial, threaded openings selectively receiving a screw adjustably engaging said conical wall of said block for providing angular force by said spring against said ball.
References Cited (Backward Citations)
US2176551A
Cited
US3096536A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-24 | 1976-04-24 | 1976-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-24 | 1980-04-24 | 1980-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-24 | 1984-04-24 | 1984-10-24 | $7700.00 | Window Closed / Lapsed |