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US3170377A
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US
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Compaction apparatus
Assignee: Dempster Systems Inc
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Filing: 1959-06-10
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Granted: 1965-02-23
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Expires: 1979-06-10
Abstract
No abstract record available.
Inventors
- 👤 William A Herpich
- 👤 Jr Henry C French
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:02
CPC Classifications
B; B65; B65F; B65F3/00; B65F3/24; B65F3/28; B65F3/02; B65F2003/0263; B65F2003/0279
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
159 words
COMPACTION APPARATUS COMPRISING A BODY, A PACKER HEAD MOVABLE BACK AND FORTH IN SAID BODY, A DOUBLE-ACTING TELESCOPIC CYLINDER UNIT CONNECTED AT ONE END THEREOF TO SAID BODY AND CONNECTED TO THE OTHER END THEREOF TO SAID PACKER HEAD FOR MOVING SAID HEAD, SAID CYLINDER UNIT COMPRISING A PLURALITY OF CYLINDERS HAVING LARGE CNETRAL OPENINGS THEREIN IN FREE COMMUNICATION WITH EACH OTHER, AND FLUID CONDUIT MEANS CONNECTED TO SAID RAM END OF SAID CYLINDER UNIT FOR DELIVERING FLUID TO THE INTERIOR OF THE CYLINDERS, THE UNIT DURING EXPANSION STROKES THEREOF, AND SEPARATE FLUID CONDUIT MEANS FOR DELIVERING FLUID TO THE SPACE BEWEEN TTHE CYLINDERS AND OUT OF COMMUNICATION WITH THE INTERIOR THEREOF FOR CAUSING RETRACTION STROKES OF THE CYLINDERS, SAID CYLINDER UNIT BEING SO CONSTRUCTED THAT A LARGE VOLUME OF FLUID MAY PASS FREELY INTO THE INTERIOR THEREOF DURING EXPANSION STROKES AND PASS FREELY FROM THE INTERIOR THEREOF DURING RETRACTION STROKES WHEREBY BACK PRESSURE DURING RETRACTION STROKES IS MINIMIZED.
Claim 2
Dependent Claim
159 words
COMPACTION APPARATUS COMPRISING A BODY, A PACKER HEAD MOVABLE BACK AND FORTH IN SAID BODY, A DOUBLE-ACTING TELESCOPIC CYLINDER UNIT CONNECTED AT ONE END THEREOF TO SAID BODY AND CONNECTED TO THE OTHER END THEREOF TO SAID PACKER HEAD FOR MOVING SAID HEAD, SAID CYLINDER UNIT COMPRISING A PLURALITY OF CYLINDERS HAVING LARGE CNETRAL OPENINGS THEREIN IN FREE COMMUNICATION WITH EACH OTHER, AND FLUID CONDUIT MEANS CONNECTED TO SAID RAM END OF SAID CYLINDER UNIT FOR DELIVERING FLUID TO THE INTERIOR OF THE CYLINDERS, THE UNIT DURING EXPANSION STROKES THEREOF, AND SEPARATE FLUID CONDUIT MEANS FOR DELIVERING FLUID TO THE SPACE BEWEEN TTHE CYLINDERS AND OUT OF COMMUNICATION WITH THE INTERIOR THEREOF FOR CAUSING RETRACTION STROKES OF THE CYLINDERS, SAID CYLINDER UNIT BEING SO CONSTRUCTED THAT A LARGE VOLUME OF FLUID MAY PASS FREELY INTO THE INTERIOR THEREOF DURING EXPANSION STROKES AND PASS FREELY FROM THE INTERIOR THEREOF DURING RETRACTION STROKES WHEREBY BACK PRESSURE DURING RETRACTION STROKES IS MINIMIZED.
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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) | 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 |