Patent US3335533A successfully refreshed from Google Patents.
US3335533A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lift mechanism for bleachers and the like
Assignee: Automatic Sprinkler Corp
•
Filing: 1964-03-27
•
Granted: 1967-08-15
•
Expires: 1984-03-27
Abstract
No abstract record available.
Inventors
- 👤 Harold F Bahr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:32
CPC Classifications
E; E04; E04H; E04H3/00; E04H3/10; E04H3/12; E04H3/123
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
153 words
A LIFT MECHANISM FOR MOVING BLEACHER UNITS AND THE LIKE COMPRISING: A PAIR OF SPACED SUPPORT ASSEMBLIES EACH INCLUDING A HORIZONTAL BASE PORTION HAVING WHEELS AND A VERTICAL GUIDE RAIL ASSEMBLY MOUNTED ON SAID BASE PORTION AT THE REAR END THEREOF, SAID SUPPORT ASSEMBLIES BEING INTERCONNECTED BY BRACING MEANS TO PROVIDE A SELFSUPPORTING STRUCTURE ADAPTED TO POSITIONING AT THE REAR OF A BLEACHER UNIT; A PAIR OF LIFT ASSEMBLIES EACH SLIDABLY MOUNTED ON THE GUIDE RAIL ASSEMBLY OF SAID PAIR OF SUPPORT ASSEMLIES, EACH OF SAID LIFT ASSEMBLIES INCLUDING A PLURALITY OF VERTICAL SPACED LIFT MEMBERS FASTENED THERETO AND ADAPTED FOR INSERTION INTO THE BLEACHER UNITS FROM THE REAR TO PROVIDE ENGAGEMENT WITH THE VERTICALLY SPACED HORIZONTALLY EXTENDING MEMBERS OF A BLEACHER UNIT; AND A LIFT MEANS MOUNTED BETWEEN EACH OF SAID SUPPORT ASSEMBLIES AND SAID LIFT ASSEMBLIES UPWARDLY WITH ENERGIZED TO MOVE SAID LIFT ASSEMBLIES UPWARDLY WITH RESPECT TO SAID SUPPORT ASSEMBLIES.
Claim 2
Dependent Claim
153 words
A LIFT MECHANISM FOR MOVING BLEACHER UNITS AND THE LIKE COMPRISING: A PAIR OF SPACED SUPPORT ASSEMBLIES EACH INCLUDING A HORIZONTAL BASE PORTION HAVING WHEELS AND A VERTICAL GUIDE RAIL ASSEMBLY MOUNTED ON SAID BASE PORTION AT THE REAR END THEREOF, SAID SUPPORT ASSEMBLIES BEING INTERCONNECTED BY BRACING MEANS TO PROVIDE A SELFSUPPORTING STRUCTURE ADAPTED TO POSITIONING AT THE REAR OF A BLEACHER UNIT; A PAIR OF LIFT ASSEMBLIES EACH SLIDABLY MOUNTED ON THE GUIDE RAIL ASSEMBLY OF SAID PAIR OF SUPPORT ASSEMLIES, EACH OF SAID LIFT ASSEMBLIES INCLUDING A PLURALITY OF VERTICAL SPACED LIFT MEMBERS FASTENED THERETO AND ADAPTED FOR INSERTION INTO THE BLEACHER UNITS FROM THE REAR TO PROVIDE ENGAGEMENT WITH THE VERTICALLY SPACED HORIZONTALLY EXTENDING MEMBERS OF A BLEACHER UNIT; AND A LIFT MEANS MOUNTED BETWEEN EACH OF SAID SUPPORT ASSEMBLIES AND SAID LIFT ASSEMBLIES UPWARDLY WITH ENERGIZED TO MOVE SAID LIFT ASSEMBLIES UPWARDLY WITH RESPECT TO SAID SUPPORT ASSEMBLIES.
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) | 1970-08-14 | 1971-02-13 | 1971-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-14 | 1975-02-13 | 1975-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-14 | 1979-02-13 | 1979-08-15 | $7700.00 | Window Closed / Lapsed |