US3399602A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impact tools
Assignee: RACINE FLUID POWER Inc C/O ROBERT BOSCH Corp A CORP OF
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Filing: 1966-09-27
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Granted: 1968-09-03
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Expires: 1986-09-27
Abstract
No abstract record available.
Inventors
- 👤 Ernst F Klessig
- 👤 Peter D Hancock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:07
CPC Classifications
B; B25; B25D; B25D9/00; B25D9/06; B25D9/12; B25D9/14; B25D9/145; Y; Y10; Y10S; Y10S173/00; Y10S173/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
157 words
IN AN IMPACT DEVICE, THE COMBINATION COMPRISING A BODY, SAID BODY HAVING A BORE, A PISTON-HAMMER RECIPROCABLE IN SAID BORE, SAID PISTON-HAMMER HAVING OPPOSED PRESSURE AREAS DEFINING FIRST AND SECOND PRESURE AREAS, SAID FIRST PRESSURE AREA HAVING AN EFFECTIVE CROSS SECTIONAL AREA LESS THAN SAID SECOND PRESSURE FLUID TO SAID MEANS FOR CONTINUOUSLY APPLYING PRESSURE FLUID TO SAID FIRST PRESSURE AREA, VALVE MEANS FOR ALTERNATELY APPLYING PRESSURE FLUID TO SAID SECOND PRESSURE AREA AND HAVING OPPOSED DIFFERENTIAL PRESSURE AREAS, MEANS FOR CONTINUOUSLY APPLYING PRESSURE FLUID TO THE SMALLER OF THE PRESSURE AREAS OF THE VALVE MEANS, AND MEANS INCLUDING THE PISTON-HAMMER FOR ALTERNATELY CONNECTING THE LARGER OF THE PRESSURE AREAS OF THE VALVE MEANS TO EITHER PRESSURE FLUID OR TO A DISCHARGE PATH AND FOR BLOCKING PRESSURE FLUID FROM THE SECOND PRESSURE AREA OF THE PISTON-HAMMER WHILE THE VALVE MEANS IS STILL POSITIONED TO SUPPLY PRESSURE FLUID THERETO TO TERMINATE THE APPLICATION OF FORCE TO THE PISTON-HAMMER.
Claim 2
Dependent Claim
157 words
IN AN IMPACT DEVICE, THE COMBINATION COMPRISING A BODY, SAID BODY HAVING A BORE, A PISTON-HAMMER RECIPROCABLE IN SAID BORE, SAID PISTON-HAMMER HAVING OPPOSED PRESSURE AREAS DEFINING FIRST AND SECOND PRESURE AREAS, SAID FIRST PRESSURE AREA HAVING AN EFFECTIVE CROSS SECTIONAL AREA LESS THAN SAID SECOND PRESSURE FLUID TO SAID MEANS FOR CONTINUOUSLY APPLYING PRESSURE FLUID TO SAID FIRST PRESSURE AREA, VALVE MEANS FOR ALTERNATELY APPLYING PRESSURE FLUID TO SAID SECOND PRESSURE AREA AND HAVING OPPOSED DIFFERENTIAL PRESSURE AREAS, MEANS FOR CONTINUOUSLY APPLYING PRESSURE FLUID TO THE SMALLER OF THE PRESSURE AREAS OF THE VALVE MEANS, AND MEANS INCLUDING THE PISTON-HAMMER FOR ALTERNATELY CONNECTING THE LARGER OF THE PRESSURE AREAS OF THE VALVE MEANS TO EITHER PRESSURE FLUID OR TO A DISCHARGE PATH AND FOR BLOCKING PRESSURE FLUID FROM THE SECOND PRESSURE AREA OF THE PISTON-HAMMER WHILE THE VALVE MEANS IS STILL POSITIONED TO SUPPLY PRESSURE FLUID THERETO TO TERMINATE THE APPLICATION OF FORCE TO THE PISTON-HAMMER.
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) | 1971-09-03 | 1972-03-04 | 1972-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-03 | 1976-03-04 | 1976-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-03 | 1980-03-04 | 1980-09-03 | $7700.00 | Window Closed / Lapsed |