US3280298A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Core plug heater
Assignee: PHILLIPS Mfg CO Inc
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Filing: 1964-04-24
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Granted: 1966-10-18
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Expires: 1984-04-24
Abstract
No abstract record available.
Inventors
- 👤 John H Klancke
- 👤 Seth B Lindsey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:10
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/02; H05B3/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
189 words
A CORE PLUG HEATER FOR AUTOMOTIVE ENGINES COMPRISING, (A) A RIGID TUBULAR MEMBER HAVING AN EXTERNALLY THREADED END PORTION AND A CIRCUMFERENTIALLY FLANGED OPPOSITE END PORTION, (B) AN ELECTRICAL HEATING ELEMENT SEALED WITHIN SAID TUBULAR MEMBER SO SEAL OFF THE INTERIOR THEREOF AND EXTENDING AXIALLY OUTWARD FROM SAID OPPOSITE END PORTION, (C) ELECTRICAL CONNECTORS MOUNTED WITHIN SAID THREADED END PORTION OF SAID TUBULAR MEMBER BEING ELECTRICALLY CONNECTED WITH SAID HEATING ELEMENT AND ADAPTED TO BE CONNECTED TO A SOURCE OF ELECTRIC POWER, (D) A DISH SHAPED ANNULAR RESILIENT CLAMPING WASHER HAVING THE CHARACTERISTIC OF EXPANDING RADIALLY WHEN FLATTENED BY COMPRESSION, SAID CLAMPING WASHER BEING POSITIONED ON SAID TUBULAR MEMBER ADJACENT THE FLANGED END PORTION THEREOF, (E) AN ANNULAR SEALING MEMBER SURROUNDING SAID TUBULAR MEMBER IN CLOSE FITTING RELATION THEREWITH AND POSITIONED ADJACENT SAID CLAMPING WASHER, SAID SEALING MEMBER BEING FORMED OF A FLOWABLE ELASTIC MATERIAL AND BEING CIRCUMFERENTIALLY EXPANDIBLE. (F) AN EXPANDER PLATE POSITIONED ON SAID THREADED END PORTION OF SAID TUBULAR MEMBER IN PIERCED RELATION THEREWITH AND BEING MOVABLE AXIALLY THEREOF, (G) AN ANNULAR CAMMING SURFACE CARRIED BY SAID EXPANDER PLATE AT ONE SIDE THEREOF AND EXTENDING CON-
Claim 2
Dependent Claim
189 words
A CORE PLUG HEATER FOR AUTOMOTIVE ENGINES COMPRISING, (A) A RIGID TUBULAR MEMBER HAVING AN EXTERNALLY THREADED END PORTION AND A CIRCUMFERENTIALLY FLANGED OPPOSITE END PORTION, (B) AN ELECTRICAL HEATING ELEMENT SEALED WITHIN SAID TUBULAR MEMBER SO SEAL OFF THE INTERIOR THEREOF AND EXTENDING AXIALLY OUTWARD FROM SAID OPPOSITE END PORTION, (C) ELECTRICAL CONNECTORS MOUNTED WITHIN SAID THREADED END PORTION OF SAID TUBULAR MEMBER BEING ELECTRICALLY CONNECTED WITH SAID HEATING ELEMENT AND ADAPTED TO BE CONNECTED TO A SOURCE OF ELECTRIC POWER, (D) A DISH SHAPED ANNULAR RESILIENT CLAMPING WASHER HAVING THE CHARACTERISTIC OF EXPANDING RADIALLY WHEN FLATTENED BY COMPRESSION, SAID CLAMPING WASHER BEING POSITIONED ON SAID TUBULAR MEMBER ADJACENT THE FLANGED END PORTION THEREOF, (E) AN ANNULAR SEALING MEMBER SURROUNDING SAID TUBULAR MEMBER IN CLOSE FITTING RELATION THEREWITH AND POSITIONED ADJACENT SAID CLAMPING WASHER, SAID SEALING MEMBER BEING FORMED OF A FLOWABLE ELASTIC MATERIAL AND BEING CIRCUMFERENTIALLY EXPANDIBLE. (F) AN EXPANDER PLATE POSITIONED ON SAID THREADED END PORTION OF SAID TUBULAR MEMBER IN PIERCED RELATION THEREWITH AND BEING MOVABLE AXIALLY THEREOF, (G) AN ANNULAR CAMMING SURFACE CARRIED BY SAID EXPANDER PLATE AT ONE SIDE THEREOF AND EXTENDING CON-
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) | 1969-10-17 | 1970-04-18 | 1970-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-17 | 1974-04-18 | 1974-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-17 | 1978-04-18 | 1978-10-18 | $7700.00 | Window Closed / Lapsed |