Patent US3170532A successfully refreshed from Google Patents.
US3170532A
Expired / Lapsed
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Effective weight-increasing device for track-laying vehicles
Assignee: Garrett Corp
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Filing: 1963-07-08
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Granted: 1965-02-23
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Expires: 1983-07-08
Abstract
No abstract record available.
Inventors
- 👤 Jr John A Boppart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:13
CPC Classifications
B; B62; B62D; B62D55/00; B62D55/08; B62D55/18; B62D55/26; B62D55/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
IN A TRACK-LAYING VEHICLE, THE COMBINATION COMPRISING: AN ENDLESS VEHICLE-SUPPORTING TRACK HAVING UPPER AND LOWER RUNS AND ENGAGING A SUPPORTING SURFACE AT THE LOWER RUN, AND TRACK INCLUDING A PLURALITY OF ARTICULATED RIGID PLATES OF WHICH EACH PLATE HAS A CAVITY IN THE OUTER FACE OF THE PLATE AND A PASSAGE THERETHROUGH AT THE CAVITY; WALL MEANS IN CLOSE PROXIMITY TO THE TRACK PLATES FORMING A PLENUM CHAMBER IMMEDIATELY ABOVE THE LOWER RUN OF THE TRACK AND OPEN AT THE LOWER SIDE THEREOF IN COMMUNICATION WITH SAID PASSAGES IN THE TRACK PLATES AS THE PLATES PASS UNDERNEATH THE WALL MEANS; AND MEANS CONNECTED TO THE PLENUM CHAMBER FOR ESTABLISHING AND MAINTAINING SUB-ATMOSPHERIC AIR PRESSURE WITHIN THE PLENUM CHAMBER AND IN THOSE CAVITIES COMMUNICATING WITH THE PLENUM CHAMBER.
Claim 2
Dependent Claim
127 words
IN A TRACK-LAYING VEHICLE, THE COMBINATION COMPRISING: AN ENDLESS VEHICLE-SUPPORTING TRACK HAVING UPPER AND LOWER RUNS AND ENGAGING A SUPPORTING SURFACE AT THE LOWER RUN, AND TRACK INCLUDING A PLURALITY OF ARTICULATED RIGID PLATES OF WHICH EACH PLATE HAS A CAVITY IN THE OUTER FACE OF THE PLATE AND A PASSAGE THERETHROUGH AT THE CAVITY; WALL MEANS IN CLOSE PROXIMITY TO THE TRACK PLATES FORMING A PLENUM CHAMBER IMMEDIATELY ABOVE THE LOWER RUN OF THE TRACK AND OPEN AT THE LOWER SIDE THEREOF IN COMMUNICATION WITH SAID PASSAGES IN THE TRACK PLATES AS THE PLATES PASS UNDERNEATH THE WALL MEANS; AND MEANS CONNECTED TO THE PLENUM CHAMBER FOR ESTABLISHING AND MAINTAINING SUB-ATMOSPHERIC AIR PRESSURE WITHIN THE PLENUM CHAMBER AND IN THOSE CAVITIES COMMUNICATING WITH THE PLENUM CHAMBER.
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) | 1968-02-23 | 1968-08-24 | 1969-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-23 | 1972-08-24 | 1973-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-23 | 1976-08-24 | 1977-02-23 | $7700.00 | Window Closed / Lapsed |