US3606361A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flat gasket for the cylinder head of combustion engines and process for making same
Assignee: Individual
•
Filing: 1969-03-14
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Granted: 1971-09-20
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Expires: 1989-03-14
Abstract
Abstract A FLAT CYLINDER HEAD GASKET INCLUDES A SEALING RING, FORMED AS A SPLIT RING, AROUND AT LEAST ONE OPENING, WITH A METAL SHIELD SURROUNDING THE SPLIT RING AND, WHEN INSERTED IN PLACE, CAUSING THE ABUTTING ENDS OF THE SPLIT RING TO BE TIGHTLY JOINED TOGETHER. THE SEALING RING IS FORMED BY STRETCHING AND WINDING A PRODILED WIRE ON A HELICAL FORM AND CUTTING THE HELIX IN A LONGITUDINAL DIRECTION, AND THE RINGS ARE RADICCALLY COMPRESSED BY THE INWARD DEFORMATION OF THE SURROUNDING METAL SHIELD.
Inventors
- 👤 Ulrich Pohl
- 👤 Otto Stulle
- 👤 Lambert Riehl
- 👤 Walter Stadelmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:41
CPC Classifications
F; F02; F02F; F02F11/00; F02F11/002; F16; F16J; F16J15/00; F16J15/02; F16J15/06; F16J15/10; F16J15/12; F16J15/121; F16J15/122; F16J15/123; Y; Y10; Y10S; Y10S277/00; Y10S277/924; Y10S277/935; Y10S277/939; Y10S277/94
Claims Analysis
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References Cited (Backward Citations)
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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) | 1974-09-19 | 1975-03-21 | 1975-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-19 | 1979-03-21 | 1979-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-19 | 1983-03-21 | 1983-09-20 | $7700.00 | Window Closed / Lapsed |