US3727638A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drain plug assembly
Assignee: PROGRESSIVE PROD Inc
•
Filing: 1971-04-26
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Granted: 1973-04-17
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Expires: 1991-04-26
Abstract
Abstract A liquid reservoir drain plug assembly is provided which is particularly suitable for automobile oil pans. The assembly is composed of a pair of plug members, one adapted to receive the other. The first member is tubular with a tapered top portion and adapted to be received by a drainage outlet in the reservoir. The second member is also tubular and adapted to be tightly received by said first member in the tapered portion thereof. The second member has a top and bottom portion, the top portion terminating in a cone and having openings in its sides. Upon loosening the second member, liquid is allowed to flow from the reservoir through the tapered portion of the first member and through the second member via the openings in the top portion. Conveniently, the second member is adapted to receive drain means, such as a hose, and a cover member to prevent foreign matter from entering when it is tightly secured in the first member.
Inventors
- 👤 C Hadden
- 👤 D Shupp
- 👤 J Zaremba
- 👤 P Cooney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:39
CPC Classifications
F; F01; F01M; F01M11/00; F01M11/04; F01M11/0408; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86187; Y10T137/86196
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
205 words
In combination with an automobile oil pan, a drain plug assembly comprising: an annular housing adapted to be received in a threaded outlet port of the oil pan and having a first end portion inwardly tapered to define a frusto-conical valve seat, an intermediate portion defining a first set of screw threads on an exterior surface thereof for cooperation with said outlet and a second set of screw threads on an interior surface thereof concentric with said first set of screw threads, said threads overlapping at least in part, and a second end portion defining means adapted to cooperate with a tool for enabling insertion and removal of said annular member by rotation thereof in said outlet; and an externally threaded hollow tubular member adapted to be received in said annular housing and having a top portion terminating in a cone with at least one opening in the side thereof communicating with the hollow interior of said member, said top portion conforming with said frusto-conical valve seat to fit tightly into said housing for providing a seal therewith, an intermediate portion defining means for enabling the opening and closing of said assembly by rotation of said tubular member, and a bottom portion defining an outlet.
Claim 2
Dependent Claim
205 words
In combination with an automobile oil pan, a drain plug assembly comprising: an annular housing adapted to be received in a threaded outlet port of the oil pan and having a first end portion inwardly tapered to define a frusto-conical valve seat, an intermediate portion defining a first set of screw threads on an exterior surface thereof for cooperation with said outlet and a second set of screw threads on an interior surface thereof concentric with said first set of screw threads, said threads overlapping at least in part, and a second end portion defining means adapted to cooperate with a tool for enabling insertion and removal of said annular member by rotation thereof in said outlet; and an externally threaded hollow tubular member adapted to be received in said annular housing and having a top portion terminating in a cone with at least one opening in the side thereof communicating with the hollow interior of said member, said top portion conforming with said frusto-conical valve seat to fit tightly into said housing for providing a seal therewith, an intermediate portion defining means for enabling the opening and closing of said assembly by rotation of said tubular member, and a bottom portion defining an outlet.
Claim 3
Dependent Claim
25 words
The assembly as recited in claim 1, further comprising means to cap the bottom portion of said tubular member to prevent matter from entering therein.
Claim 4
Dependent Claim
24 words
The assembly as recited in claim 1, wherein the cone on said top portion of said tubular member is coated with a resilient material.
Claim 5
Dependent Claim
32 words
The assembly as recited in claim 1, further comprising oil conduit means connected at one end to the outlet of said tubular member and at its other end to liquid collection means.
Claim 6
Dependent Claim
26 words
The assembly as recited in claim 4, wherein said liquid collection means comprises a disposable, thermoplastic receptacle for receiving the entire contents of the oil pan.
References Cited (Backward Citations)
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US1816004A
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US2985180A
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US3196688A
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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) | 1976-04-16 | 1976-10-16 | 1977-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-16 | 1980-10-16 | 1981-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-16 | 1984-10-16 | 1985-04-17 | $7700.00 | Window Closed / Lapsed |