Patent US3694889A successfully refreshed from Google Patents.
US3694889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of setting fire rings in cylinder head gaskets
Assignee: Cefilac SA
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Filing: 1970-10-05
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Granted: 1972-10-03
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Expires: 1990-10-05
Abstract
Abstract Method of setting fire rings in gaskets according to which a metallic sheet is provided with holes having upstanding cylindrical rings dimensioned and positioned to register with holes in the gasket. Rings encircling these rims are then cut from the metallic sheet while retaining them in their relative position, the gasket is placed on the rings so that the rims project through the gasket holes, and the rims are pressed down against the gasket. The invention includes a machine which carries out all but the first of these steps successively and automatically.
Inventors
- 👤 Pierre Pommier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:30
CPC Classifications
F; 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; Y10T; Y10T29/00; Y10T29/49; Y10T29/49789; Y10T29/49826; Y10T29/49908; Y10T29/49915; Y10T29/4992; Y10T29/51; Y10T29/5176; Y10T29/5177; Y10T29/53; Y10T29/53996
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
135 words
Method of setting fire rings in the orifices of a gasket which method comprises the steps of preparing a flat metallic sheet having orifices encircled by upturned cylindrical rims dimensioned to fit into and having relative positions corresponding to those of the orifices in said gasket, positioning said sheet on a support, cutting rings from said sheet encircling said rims while leaving around each cylindrical rim a flange in the plane of the sheet and without modifying the position of the rings, depositing said gasket on said rings so that said cylindrical rims pass through the corresponding orifices in the gasket and one of the surfaces of the gasket comes into contact with the flanges, and bending the cylindrical rims back against the surface of the gasket opposite the surface in contact with the flanges.
Claim 2
Dependent Claim
135 words
Method of setting fire rings in the orifices of a gasket which method comprises the steps of preparing a flat metallic sheet having orifices encircled by upturned cylindrical rims dimensioned to fit into and having relative positions corresponding to those of the orifices in said gasket, positioning said sheet on a support, cutting rings from said sheet encircling said rims while leaving around each cylindrical rim a flange in the plane of the sheet and without modifying the position of the rings, depositing said gasket on said rings so that said cylindrical rims pass through the corresponding orifices in the gasket and one of the surfaces of the gasket comes into contact with the flanges, and bending the cylindrical rims back against the surface of the gasket opposite the surface in contact with the flanges.
Claim 3
Dependent Claim
23 words
Method as claimed in claim 1 in which the orifices in the metallic sheet are formed before it is positioned on the support.
References Cited (Backward Citations)
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Cited
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US2829488A
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US3150790A
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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) | 1975-10-03 | 1976-04-03 | 1976-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-03 | 1980-04-03 | 1980-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-03 | 1984-04-03 | 1984-10-03 | $7700.00 | Window Closed / Lapsed |