Patent US3884485A successfully refreshed from Google Patents.
US3884485A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Collapsible roller skate
Assignee: Frespa AG
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Filing: 1973-08-20
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Granted: 1975-05-20
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Expires: 1993-08-20
Abstract
Abstract A thick-platformed roller skate in which the rollers are retractably mounted on levers horizontally pivoted on the platform, the levers having their free ends in generally proximate relation and engaged by common releasable detent to hold the levers at least in position with the rollers in projected operable position, and preferably in both projected and retracted positions.
Inventors
- 👤 Josua Walle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:22
CPC Classifications
A; A63; A63C; A63C17/00; A63C17/20; A43; A43B; A43B5/00; A43B5/16; A43B5/1633; A63C17/008
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
215 words
In a convertable roller skate comprising a thick platform having recesses in its undersurface at least adjacent its opposite ends, roller means adjacent each of said platform ends, and means supporting such rollers for movement from a retracted position fully within said recess to an operative position at least partially protruding from said recess, the improvement wherein said roller supporting means comprises a rigid lever for each such roller means, said lever carrying at one end thereof said roller means for rotation about the roller axis and being pivoted intermediate its ends to said platform on a fixed horizontal axis intermediate the platform top and bottom, whereby pivotal movement of said lever from a generally horizontal position to an inclined position moves the corresponding roller means from said retracted to said operative position and vice versa, each said lever extending in the direction of said opposite roller means and terminating at its free end in proximate spaced relation to the free end of the other lever, and a common detent means supported by said platform for engaging the mutually adjacent ends of said levers to positively hold said levers in their respective inclined positions and thereby said roller means in their respectivE operative protruding positions, said detent means being releasable to free said lever ends.
Claim 2
Dependent Claim
215 words
In a convertable roller skate comprising a thick platform having recesses in its undersurface at least adjacent its opposite ends, roller means adjacent each of said platform ends, and means supporting such rollers for movement from a retracted position fully within said recess to an operative position at least partially protruding from said recess, the improvement wherein said roller supporting means comprises a rigid lever for each such roller means, said lever carrying at one end thereof said roller means for rotation about the roller axis and being pivoted intermediate its ends to said platform on a fixed horizontal axis intermediate the platform top and bottom, whereby pivotal movement of said lever from a generally horizontal position to an inclined position moves the corresponding roller means from said retracted to said operative position and vice versa, each said lever extending in the direction of said opposite roller means and terminating at its free end in proximate spaced relation to the free end of the other lever, and a common detent means supported by said platform for engaging the mutually adjacent ends of said levers to positively hold said levers in their respective inclined positions and thereby said roller means in their respectivE operative protruding positions, said detent means being releasable to free said lever ends.
Claim 3
Dependent Claim
18 words
The skate of claim 1 wherein said detent means is movable to disengage from the free lever ends.
Claim 4
Dependent Claim
28 words
The skate of claim 1 wherein said detent means engages said lever ends in both said horizontal and inclined positions to maintain the levers in both said positions.
Claim 5
Dependent Claim
27 words
The skate of claim 1 wherein said platform has separate recesses therein for the separate roller means and a generally connecting channel therebetween for receiving said levers.
Claim 6
Dependent Claim
23 words
The skate of claim 1 wherein said detent means comprises a solid body having surfaces intercepting the pivotal paths of said lever ends.
Claim 7
Dependent Claim
20 words
The skate of claim 5 wherein said solid body is movable bodily out of the paths of the lever ends.
Claim 8
Dependent Claim
45 words
The skate of claim 5 wherein each lever has at its free end an inclined face extending downwardly and away from said end and said detent body is adapted to wedgingly engage the mutually facing inclined faces to hold said levers in their inclined position.
Claim 9
Dependent Claim
43 words
The skate of claim 7 wherein each lever end also has an inclined face extending upwardly and away from said end, and said detent body is adapted to also wedgingly engage the latter faces to hold the levers in their respective horizontal positions.
Claim 10
Dependent Claim
35 words
The skate of claim 8 wherein said detent body is generally cylindrical in shape, being arranged in said platform on axis parallel to the lever pivotal axes, and is movable bodily axially along said axis.
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) | 1978-05-19 | 1978-11-18 | 1979-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-19 | 1982-11-18 | 1983-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-19 | 1986-11-18 | 1987-05-20 | $7700.00 | Window Closed / Lapsed |