US3604371A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stackable transit platform
Assignee: American Science and Engineering Inc
•
Filing: 1970-05-07
•
Granted: 1971-09-14
•
Expires: 1990-05-07
Abstract
Abstract This disclosure relates to transit platforms suited for simplified educational or demonstrative use. The platforms are formed from a pair of dishlike, molded plastic sheets which are secured together in a nested configuration so that their rims are generally concentric. The concentric rims are molded to define a number of downwardly opening sockets which are spaced circumferentially about the platforms and which receive removable legs. The upper surface of the platform has a central upstanding peg which engages the transit. The periphery of the top of the platform is surrounded by a rim which holds the transit in place and which may be marked in degrees. The rim includes a number of circumferentially spaced depressions which are intended to receive projections formed at the underside of other platforms thus facilitating the stacking of the platforms one atop the other.
Inventors
- 👤 Ralph Cavalucci
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:38
CPC Classifications
A; A47; A47B; A47B3/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
160 words
A platform adapted to support a device for rotation about a vertical axis comprising: an upper dishlike member having a circumferential downwardly depending outer skirt; a lower, dishlike member having a downwardly depending inner skirt, said lower member being disposed concentrically below said upper member and within the outer skirt of said upper member, said inner skirt of said lower member being in engagement with said outer skirt of said upper member; said outer member having a plurality of outwardly bulging dimples formed therein at circumferentially spaced locations, said outwardly bulging dimples defining inwardly facing concave depressions; said inner flange of said lower member having inwardly bulging dimples defining outwardly facing concave depressions, said concave depressions on said inner skirt being circumferentially spaced thereabout in registry with the inwardly facing concave depressions formed on the outer skirt of said upper member, said depressions on said inner and outer flanges defining a socket receptive to a leg for supporting said platform.
Claim 2
Dependent Claim
160 words
A platform adapted to support a device for rotation about a vertical axis comprising: an upper dishlike member having a circumferential downwardly depending outer skirt; a lower, dishlike member having a downwardly depending inner skirt, said lower member being disposed concentrically below said upper member and within the outer skirt of said upper member, said inner skirt of said lower member being in engagement with said outer skirt of said upper member; said outer member having a plurality of outwardly bulging dimples formed therein at circumferentially spaced locations, said outwardly bulging dimples defining inwardly facing concave depressions; said inner flange of said lower member having inwardly bulging dimples defining outwardly facing concave depressions, said concave depressions on said inner skirt being circumferentially spaced thereabout in registry with the inwardly facing concave depressions formed on the outer skirt of said upper member, said depressions on said inner and outer flanges defining a socket receptive to a leg for supporting said platform.
Claim 3
Dependent Claim
48 words
A platform as defined in claim 1 further comprising: means forming a gusset in association with each of said dimples formed on the inner flange of said lower member, each of said gussets extending from its associated dimple to the underside of the base of said lower member.
Claim 4
Dependent Claim
46 words
A platform as defined in claim 2 wherein said upper member includes a circumferential rim extending upwardly from and about said base of said upper member; and means forming depressions along said rim, said depressions being formed in circumferential registry with the sockets and said gussets.
Claim 5
Dependent Claim
45 words
A platform as defined in claim 3 further comprising: a tubular member disposed within each of said sockets and in engagement with the concave surfaces of said socket-defining dimples, said tubular member being bonded securely to the concave surface of each of its associated dimples.
Claim 6
Dependent Claim
46 words
A support platform as defined in claim 1 further comprising: a tubular member disposed within each of said sockets and in engagement with the concave surfaces of said socket-defining dimples, said tubular member being bonded securely to the concave surface of each of its associated dimples.
Claim 7
Dependent Claim
46 words
A support platform as defined in claim 1 wherein said skirts are tapered downwardly and outwardly and wherein said sockets are disposed in a downward and outward attitude whereby said legs may be received in a downwardly diverging configuration to provide firm support for said platform.
Claim 8
Dependent Claim
42 words
A platform as defined in claim 1 further comprising: a pin formed integrally with and at the center of said base, said pin extending upwardly from said base to provide a substantially vertical rotational axis for a member supported on said platform
Claim 9
Dependent Claim
50 words
A platform as defined in claim 1 wherein the lower end of said outer skirt of said outer member and lower end of said inner skirt of said lower member terminate in substantially horizontal circumferential flanges, said skirts and said flanges being bonded to each other along their mating surfaces.
References Cited (Backward Citations)
US362915A
Cited
US2546439A
Cited
US2579348A
Cited
US2614780A
Cited
US3490724A
Cited
US3522778A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-13 | 1975-03-15 | 1975-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-13 | 1979-03-15 | 1979-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-13 | 1983-03-15 | 1983-09-14 | $7700.00 | Window Closed / Lapsed |