US4996738A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Free wheel caster
Assignee: Individual
•
Filing: 1990-01-31
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Granted: 1991-03-05
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Expires: 2010-01-31
Abstract
Abstract A free wheel caster is provided and consists of a large ball rotatively carried within a cavity in a cup portion of a caster body which rolls against a plurality of small balls to ride freely within anti-friction material coating recesses in the cavity. The caster body can be attached to bottom of an object to move the object across a flat surface. It can also be attached to top of an object to move other objects thereacross. A ready access hole is also provided in the cup portion so that a tool can be inserted for prying and thereby removing the large ball from the cavity in the cup portion for cleaning and repair.
Inventors
- 👤 Salustiano Tifre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:36
CPC Classifications
B; B60; B60B; B60B33/00; B60B33/08; Y; Y10; Y10S; Y10S16/00; Y10S16/27
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
223 words
A free wheel caster which comprises: (a) a caster body defined by a base portion, a shaft portion extending from the base portion and a one piece cup portion extending from the shaft portion, the base portion being adapted to be affixed in a first position to a bottom portion of an object and in a second position to a top portion of an object, the cup portion having a generally dome-shaped cavity therein with a plurality of spaced apart recesses formed in a wall of the cavity; (b) a plurality of small balls, each mounted to freely ride within a recess; and (c) a large ball rotatively captivated in the cavity to engage with said small balls in a manner to be freely rotatable in any direction in the cavity so that, when said base portion is affixed in the first position, the object can be moved easily along a flat surface, and when said base portion is affixed in the second position, other objects can be moved across said large ball; (d) the cup portion of said caster body having a ready access hole means extending through said wall of the cavity for inserting a tool therethrough and into the cavity to forcibly pry said large ball from the dome-shaped cavity so that the cup portion can be cleaned and repaired.
Claim 2
Dependent Claim
223 words
A free wheel caster which comprises: (a) a caster body defined by a base portion, a shaft portion extending from the base portion and a one piece cup portion extending from the shaft portion, the base portion being adapted to be affixed in a first position to a bottom portion of an object and in a second position to a top portion of an object, the cup portion having a generally dome-shaped cavity therein with a plurality of spaced apart recesses formed in a wall of the cavity; (b) a plurality of small balls, each mounted to freely ride within a recess; and (c) a large ball rotatively captivated in the cavity to engage with said small balls in a manner to be freely rotatable in any direction in the cavity so that, when said base portion is affixed in the first position, the object can be moved easily along a flat surface, and when said base portion is affixed in the second position, other objects can be moved across said large ball; (d) the cup portion of said caster body having a ready access hole means extending through said wall of the cavity for inserting a tool therethrough and into the cavity to forcibly pry said large ball from the dome-shaped cavity so that the cup portion can be cleaned and repaired.
Claim 3
Dependent Claim
58 words
A free wheel caster as recited in claim 1, wherein the base portion of said caster body defines a mounting plate having a plurality of apertures therethrough, and said mounting plate is transversely aligned with respect to an axis of the shaft portion so that fasteners can extend through the apertures and into the object for securement thereto.
Claim 4
Dependent Claim
20 words
A free wheel caster as recited in claim 1, wherein an anti-friction coating is applied within each of the recesses.
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) | 1994-03-04 | 1994-09-03 | 1995-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-03-04 | 1998-09-03 | 1999-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-03-04 | 2002-09-03 | 2003-03-05 | $7700.00 | Window Closed / Lapsed |