Patent US1356247A successfully refreshed from Google Patents.
Patent US3195658A successfully refreshed from Google Patents.
US3195658A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air return system for air feed drill
Assignee: Ingersoll Rand Co
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Filing: 1962-07-25
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Granted: 1965-07-20
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Expires: 1982-07-25
Abstract
No abstract record available.
Inventors
- 👤 Thomas S Reed
- 👤 Hugh B Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:58
CPC Classifications
E; E21; E21B; E21B6/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
A FLUID-OPERATED TOOL FOR ROTATING AND AXIALLY RECIPROCATING A TOOL IMPLEMENT, SAID TOOL COMPRISING: A TOOL BODY; A PISTON SLIDABLY MOUNTED IN SAID BODY FOR AXIALLY RECIPROCATING MOVEMENTS THEREIN AND CARRYING A FLUID-OPERATED MOTOR AND A SPINDLE ON ITS FRONT END; SAID TOOL BODY CONTAINING A PAIR OF PISTON CHAMBERS SEPARATED BY SAID PISTON AND ADAPTED TO RECEIVE FLUID PRESSURE ALTERNATELY FOR RECIPROCATING SAID PISTON, SAID PAIR OF PISTON CHAMBERS INCLUDING A FORWARD FEED CHAMBER AND A RETRACTION CHAMBER; EXHAUST MEANS OPERTIVE TO NORMALLY EXHAUST SAID RETRACTION CHAMBER WHEN THE PRESSURE IN THE RETRACTION CHAMBER IS LOW AND OPERATIVE TO SEAL THE RETRACTION CHAMBER WHEN THE PRESSURE IN THE RETRACTION CHAMBER IS HIGH; AND VALVE MEANS CONNECTED TO SAID PISTON CHAMBERS FOR ADMITTING FLUID PRESSURE ALTERNATELY INTO SAID PISTON CHAMBERS.
Claim 2
Dependent Claim
130 words
A FLUID-OPERATED TOOL FOR ROTATING AND AXIALLY RECIPROCATING A TOOL IMPLEMENT, SAID TOOL COMPRISING: A TOOL BODY; A PISTON SLIDABLY MOUNTED IN SAID BODY FOR AXIALLY RECIPROCATING MOVEMENTS THEREIN AND CARRYING A FLUID-OPERATED MOTOR AND A SPINDLE ON ITS FRONT END; SAID TOOL BODY CONTAINING A PAIR OF PISTON CHAMBERS SEPARATED BY SAID PISTON AND ADAPTED TO RECEIVE FLUID PRESSURE ALTERNATELY FOR RECIPROCATING SAID PISTON, SAID PAIR OF PISTON CHAMBERS INCLUDING A FORWARD FEED CHAMBER AND A RETRACTION CHAMBER; EXHAUST MEANS OPERTIVE TO NORMALLY EXHAUST SAID RETRACTION CHAMBER WHEN THE PRESSURE IN THE RETRACTION CHAMBER IS LOW AND OPERATIVE TO SEAL THE RETRACTION CHAMBER WHEN THE PRESSURE IN THE RETRACTION CHAMBER IS HIGH; AND VALVE MEANS CONNECTED TO SAID PISTON CHAMBERS FOR ADMITTING FLUID PRESSURE ALTERNATELY INTO SAID PISTON CHAMBERS.
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) | 1968-07-19 | 1969-01-18 | 1969-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-19 | 1973-01-18 | 1973-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-19 | 1977-01-18 | 1977-07-20 | $7700.00 | Window Closed / Lapsed |