US3812810A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Controlled expansion marine plug
Assignee: MOELLER MANUFACTURING Co Inc A CORP OF DELAWARE
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Filing: 1973-03-02
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Granted: 1974-05-28
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Expires: 1993-03-02
Abstract
Abstract A bailer plug is described comprising a resilient compressible stopper body having resilient sealing ribs, in which the grooves between the ribs are of reduced height so as to provide quicker purchase on the interior of the thimble in which the plug is inserted. The threaded stem, attached to a turning handle, engages a threaded plate having upstanding fingers received in slots in a lower compression plate and in corresponding slots in the lower portion of the resilient compressible stopper body. This arrangement prevents overturning with consequent rubber flow over the end of the plug and loss of the seal. In order to prevent leakage of water through the plug, an O-ring of compressible material is provided between the upper compression plate and the stem.
Inventors
- 👤 A Moeller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:27
CPC Classifications
B; B63; B63B; B63B13/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
137 words
An improved bailer plug comprising in combination: a. a resilient compressible stopper body having a longitudinal bore therethrough; b. a threaded stem extending through said bore; c. an upper compression plate disposed at the upper surface of said body; d. a lower compression plate at the lower surface of said body; e. said lower compression plate having diametrically opposed slots therein; f. a plate threadedly engaging said stem and having upwardly extending fingers passing through said slots and engaging the interior of said body, so that when said stem is turned, said compression plates are drawn together; and g. sealing means for preventing leakage through said body compressing an O-ring formed of resilient stem and disposed above said upper compression plate and concave washer means surrounding said stem and said O-ring for retaining said O-ring in place.
Claim 2
Dependent Claim
137 words
An improved bailer plug comprising in combination: a. a resilient compressible stopper body having a longitudinal bore therethrough; b. a threaded stem extending through said bore; c. an upper compression plate disposed at the upper surface of said body; d. a lower compression plate at the lower surface of said body; e. said lower compression plate having diametrically opposed slots therein; f. a plate threadedly engaging said stem and having upwardly extending fingers passing through said slots and engaging the interior of said body, so that when said stem is turned, said compression plates are drawn together; and g. sealing means for preventing leakage through said body compressing an O-ring formed of resilient stem and disposed above said upper compression plate and concave washer means surrounding said stem and said O-ring for retaining said O-ring in place.
Claim 3
Dependent Claim
19 words
The bailer plug set forth in claim 1, wherein said body includes inwardly extending pockets for receiving said fingers.
Claim 4
Dependent Claim
29 words
The bailer plug set forth in claim 1, wherein said body comprises resilient sealing ribs for engaging the inner face of a thimble, said ribs being separated by grooves.
Claim 5
Dependent Claim
14 words
The bailer plug set forth in claim 3, wherein said grooves are relatively shallow.
Claim 6
Dependent Claim
18 words
The bailer plug set forth in claim 4, further including means for attaching the plug to a boat.
References Cited (Backward Citations)
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Cited
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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) | 1977-05-27 | 1977-11-26 | 1978-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-27 | 1981-11-26 | 1982-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-27 | 1985-11-26 | 1986-05-28 | $7700.00 | Window Closed / Lapsed |