US3128468A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable stapler with pneumatic drive
Assignee: Joh Friedrich Behrens AG
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Filing: 1962-03-08
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Granted: 1964-04-14
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Expires: 1982-03-08
Abstract
No abstract record available.
Inventors
- 👤 Bade Heinz Emil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:49
CPC Classifications
B; B25; B25C; B25C1/00; B25C1/04; B25C1/047
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
167 words
IN A PORTABLE STAPLER HAVING A CYLINDER AND A CYLINDER HEAD CLOSING ONE END THEREOF, AND INLET MEANS IN SAID CYLINDER FOR ADMITTING COMPRESSED AIR; A PISTON PROVIDED WITH STAPLE DRIVER MEANS AND RECIPROCABLE IN SAID CYLINDER FROM A STARTING POSITION INTO AN END POSITION AND VICE VERSA, SAID PISTON ALSO BEING PROVIDED WITH AN EFFECTIVE SURFACE AREA CONTINUOUSLY COMMUNICATING WITH SAID INLET MEANS AND OPERABLE IN RESPONSE TO A CERTAIN PRESSURE ACTING UPON SAID EFFECTIVE SURFACE AREA TO ACTUATE SAID PISTON FOR PERFORMING A DRIVING STROKE FROM SAID STARTING POSITION TO SAID END POSITION, FIRST HOLDING MEANS IN SAID ONE END OF SAID CYLINDER, AND SECOND HOLDING MEANS CONNECTED TO SAID PISTON AND TELESCOPICALLY RECEIVED IN SAID FIRST HOLDING MEANS IN SAID STARTING POSITION OF SAID PISTON, SAID FIRST AND SECOND HOLDING MEANS ADHERING TO EACH OTHER BY FRICTION ONLY AND AT A FORCE SUFFICIENT TO BALANCE ONLY A CERTAIN AIR PRESSURE ACTING ON SAID PISTON AREA WHICH IS LESS THAN SAID FIRST MENTIONED CERTAIN PRESSURE.
Claim 2
Dependent Claim
167 words
IN A PORTABLE STAPLER HAVING A CYLINDER AND A CYLINDER HEAD CLOSING ONE END THEREOF, AND INLET MEANS IN SAID CYLINDER FOR ADMITTING COMPRESSED AIR; A PISTON PROVIDED WITH STAPLE DRIVER MEANS AND RECIPROCABLE IN SAID CYLINDER FROM A STARTING POSITION INTO AN END POSITION AND VICE VERSA, SAID PISTON ALSO BEING PROVIDED WITH AN EFFECTIVE SURFACE AREA CONTINUOUSLY COMMUNICATING WITH SAID INLET MEANS AND OPERABLE IN RESPONSE TO A CERTAIN PRESSURE ACTING UPON SAID EFFECTIVE SURFACE AREA TO ACTUATE SAID PISTON FOR PERFORMING A DRIVING STROKE FROM SAID STARTING POSITION TO SAID END POSITION, FIRST HOLDING MEANS IN SAID ONE END OF SAID CYLINDER, AND SECOND HOLDING MEANS CONNECTED TO SAID PISTON AND TELESCOPICALLY RECEIVED IN SAID FIRST HOLDING MEANS IN SAID STARTING POSITION OF SAID PISTON, SAID FIRST AND SECOND HOLDING MEANS ADHERING TO EACH OTHER BY FRICTION ONLY AND AT A FORCE SUFFICIENT TO BALANCE ONLY A CERTAIN AIR PRESSURE ACTING ON SAID PISTON AREA WHICH IS LESS THAN SAID FIRST MENTIONED CERTAIN PRESSURE.
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) | 1967-04-14 | 1967-10-14 | 1968-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-14 | 1971-10-14 | 1972-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-14 | 1975-10-14 | 1976-04-14 | $7700.00 | Window Closed / Lapsed |