Patent US3635369A successfully refreshed from Google Patents.
US3635369A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Precoated plug
Assignee: JOHN L MONIER
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Filing: 1969-08-19
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Granted: 1972-01-18
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Expires: 1989-08-19
Abstract
Abstract A plug adapted to close off core openings in an internal combustion engine is precoated with a plastic which forms a fluidtight seal between the peripheral surface of the plug and the core opening upon insertion of the plug therein. The plug is preferably coated with a solution of a polyvinylidene chloride in cyclohexanone which is cured by heating for 20 minutes at 160* F. The thickness of the plastic coating may be doubled by heating the coated plug for 10 minutes at 350* F.
Inventors
- 👤 Tull C Lasswell
- 👤 John L Monier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:01
CPC Classifications
F; F02; F02B; F02B77/00; F02B77/005
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
97 words
A plug for closing an opening formed in a workpiece comprising a body member having a periphery of a shape which is complementary to that of said opening, and a plastic coating disposed on said periphery for creating a seal between said plug and said opening when said plug is positioned therein, wherein said body member is cup-shaped, and has a substantially cylindrical outer periphery which is adapted to be closely fitted within said opening and wherein said plastic coating is plastically deformed for creating a seal between said opening and the outer periphery of said plug.
Claim 2
Dependent Claim
29 words
A plug as claimed in claim 2, wherein the outer periphery of said cup-shaped member forms an edge which diverges outwardly from said cup-shaped member to engage said opening.
Claim 3
Dependent Claim
30 words
The plug as claimed in claim 2 in which said plastic coating is comprised of a polyvinylidene chloride and a solvent selected from the group consisting of methol-ethyl-ketone and cyclohexanone.
Claim 4
Dependent Claim
115 words
A plug for closing an opening formed in a workpiece comprising a body member having a periphery of a shape which is complementary to said opening, and a plastic coating disposed on said plug periphery for creating a seal between said plug and said opening when said plug is positioned therein, wherein said body member is cup-shaped with an edge reversely bent to form an outer peripheral wall, said outer peripheral wall having said plastic coating disposed thereon and said plug being press fitted within said opening wherein said plastic coating formed on said outer peripheral wall is plastically deformed creating a seal between said opening and said outer peripheral wall of said body member.
Claim 5
Dependent Claim
23 words
The plug as claimed in claim 5, wherein said reversely bent edge diverges outwardly from said cup-shaped body member to engage said opening.
Claim 6
Dependent Claim
29 words
The plug as claimed in claim 5, wherein said plastic coating is comprised of a polyvinylidenE chloride and a solvent selected from the group consisting of methol-ethyl-ketone and cyclohexanone.
References Cited (Backward Citations)
GB204385A
Cited
US3476287A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-17 | 1975-07-19 | 1976-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-17 | 1979-07-19 | 1980-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-17 | 1983-07-19 | 1984-01-18 | $7700.00 | Window Closed / Lapsed |