US3247947A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Passenger conveyors
Assignee: Westinghouse Electric Corp
•
Filing: 1963-07-02
•
Granted: 1966-04-26
•
Expires: 1983-07-02
Abstract
No abstract record available.
Inventors
- 👤 Donald K Fox
- 👤 Charles L Carlson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:33
CPC Classifications
C; C23; C23C; C23C4/00; C23C4/04; B; B66; B66B; B66B23/00; B66B23/08; B66B23/10; C22; C22C; C22C32/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
IN A MOVING WALK FOR TRANSPORTING PASSENGERS, A STRUCTURE HAVING FIRST AND SECOND SPACED LANDINGS, A BELT COMPRISING AN ENDLESS SERIES OF ARTICULATED SIMILAR TREADBOARDS AND HAVING A PASSENGER TRANSPORTING RUN INCLINED AWAY FROM THE HORIZONTAL AND A RETURN RUN, AND MEANS FOR MOVING SAID BELT IN A CLOSED PATH WITH SAID PASSENGER TRANSPORTING RUN EXTENDING BETWEEN SAID LANDINGS, EACH OF SAID TREADBOARDS COMPRISING A RIGID BASE PORTION AND HAVING RELATIVELY LOW WEAR RESISTANCE AND A WEAR RESISTANCE COATING BONDED TO THAT SURFACE OF SUCH BASE PORTION WHICH IS THE UPPER SURFACE THEREOF DURING SAID PASSENGER TRANSPORTING RUN, SAID COATING PRESENTING A ROUGH SURFACE TO LOAD DISPOSED THEREON FOR INHIBITING RELATIVE MOTION THEREBETWEEN, SAID COATING RETAINING ITS SURFACE ROUGHNESS AS ITS THICKNESS DECREASES AS A RESULT OF THE WEARING AWAY THEREOF BY LOAD CARRIED THEREBY.
Claim 2
Dependent Claim
135 words
IN A MOVING WALK FOR TRANSPORTING PASSENGERS, A STRUCTURE HAVING FIRST AND SECOND SPACED LANDINGS, A BELT COMPRISING AN ENDLESS SERIES OF ARTICULATED SIMILAR TREADBOARDS AND HAVING A PASSENGER TRANSPORTING RUN INCLINED AWAY FROM THE HORIZONTAL AND A RETURN RUN, AND MEANS FOR MOVING SAID BELT IN A CLOSED PATH WITH SAID PASSENGER TRANSPORTING RUN EXTENDING BETWEEN SAID LANDINGS, EACH OF SAID TREADBOARDS COMPRISING A RIGID BASE PORTION AND HAVING RELATIVELY LOW WEAR RESISTANCE AND A WEAR RESISTANCE COATING BONDED TO THAT SURFACE OF SUCH BASE PORTION WHICH IS THE UPPER SURFACE THEREOF DURING SAID PASSENGER TRANSPORTING RUN, SAID COATING PRESENTING A ROUGH SURFACE TO LOAD DISPOSED THEREON FOR INHIBITING RELATIVE MOTION THEREBETWEEN, SAID COATING RETAINING ITS SURFACE ROUGHNESS AS ITS THICKNESS DECREASES AS A RESULT OF THE WEARING AWAY THEREOF BY LOAD CARRIED THEREBY.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-25 | 1969-10-25 | 1970-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-25 | 1973-10-25 | 1974-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-25 | 1977-10-25 | 1978-04-26 | $7700.00 | Window Closed / Lapsed |