US3584329A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Escalator cleaning apparatus
Assignee: Concept Development Corp
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Filing: 1965-06-16
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Granted: 1971-06-15
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Expires: 1985-06-16
Abstract
Abstract AN APPARATUS MOUNTED ON WHEELS INCORPORATING BRUSH MEANS AND SPRAY MEANS TO CLEAN THE FLIGHTS OF AN OPERATING ESCALLATOR HAS GUIDE MEANS TO ENGAGE THE FIXED BALUSTRADES OF THE ESCALLATOR FOR ACCURATE POSITIONING OF THE APPARATUS AND HAS MEANS TO IMMOBILIZE THE APPARATUS FOR A CLEANING OPERATION. IN RESPONSE TO SUCH IMMOBILIZATION, A SELF-ALIGNING VACUUM NOZZLE AND BRUSH CARRIAGE IS LOWERED INTO OPERATING POSITION. A YIELDINGLY EXTENSIBLE FORWARD STRUCTURE MAKES GUIDING CONTACT WITH FRONT SURFACES OF DESCENDING FLIGHTS OF STEPS TO BRUSH THE FRONT AND TOP SURFACES THEREOF.
Inventors
- 👤 Phillip Cravits
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:37
CPC Classifications
B; B66; B66B; B66B31/00; B66B31/003; A; A47; A47L; A47L11/00; A47L11/02; A47L11/20; A47L11/40; A47L11/4036; A47L11/4044; A47L11/4052; A47L11/4055; A47L11/4058; A47L11/4072; A47L11/408; A47L11/4088; A47L7/00; A47L7/0004; A47L7/0009
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-14 | 1974-12-14 | 1975-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-14 | 1978-12-14 | 1979-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-14 | 1982-12-14 | 1983-06-15 | $7700.00 | Window Closed / Lapsed |