Patent US4557526A successfully refreshed from Google Patents.
US4557526A
Expired / Lapsed
US
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Waterproof axle system for a boat trailer
Assignee: Individual
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Filing: 1984-07-06
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Granted: 1985-12-10
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Expires: 2004-07-06
Abstract
Abstract A system is disclosed for a boat trailer which prevents water from entering the trailer's axle housing when the axle housing is submerged in water during loading or unloading of a boat from the trailer. The system includes a quantity of lubricating oil maintained in the axle housing by seals interposed between the trailers wheel axle and the axle housing and an elongated, hollow tubular member having one end in communication with said lubricating oil and the other end vented to the atmosphere when the axle housing is submerged.
Inventors
- 👤 George O. Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:47
CPC Classifications
B; B60; B60B; B60B37/00; B60B37/06; B60B37/08; B60B35/00; B60B35/02; B60B35/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
124 words
A waterproof axle system for boat trailers having a frame for supporting a boat comprising: (a) an elongated tubular axle housing means adapted to be attached to said frame and containing a quantity of lubricating oil, (b) stub axle means having means for rotatably mounting said stub axle in each end of said axle housing, each of said stub axle means having flange means for attachment to a vehicle tire, (c) seal means interposed between said stub axle means and said rotatable mounting means, and (d) means intermediate said ends of said axle housing means in communication with said lubricating oil for preventing water from passing said seal means into said axle housing means when said axle housing means is submerged in said water.
Claim 2
Dependent Claim
124 words
A waterproof axle system for boat trailers having a frame for supporting a boat comprising: (a) an elongated tubular axle housing means adapted to be attached to said frame and containing a quantity of lubricating oil, (b) stub axle means having means for rotatably mounting said stub axle in each end of said axle housing, each of said stub axle means having flange means for attachment to a vehicle tire, (c) seal means interposed between said stub axle means and said rotatable mounting means, and (d) means intermediate said ends of said axle housing means in communication with said lubricating oil for preventing water from passing said seal means into said axle housing means when said axle housing means is submerged in said water.
Claim 3
Dependent Claim
53 words
A system as set forth in claim 1 wherein said preventing means is an elongated, hollow, tubular member having one end thereof attached to said axle housing means in communication with said lubricating oil and the other end thereof vented to the atmosphere when said axle housing means is submerged in said water.
Claim 4
Dependent Claim
20 words
A system as set forth in claim 1 further comprising means through said axle housing means for draining fluid therefrom.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-12-09 | 1989-06-10 | 1989-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-09 | 1993-06-10 | 1993-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-09 | 1997-06-10 | 1997-12-10 | $7700.00 | Window Closed / Lapsed |