Patent US3650310A successfully refreshed from Google Patents.
US3650310A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination boat trim tab and heat exchanger
Assignee: Stewart and Stevenson Services Inc
•
Filing: 1970-07-16
•
Granted: 1972-03-21
•
Expires: 1990-07-16
Abstract
Abstract A combination boat trim tab and heat exchanger for an engine driven boat in which the trim tab body is hollow and has an inlet and outlet connected to the hollow interior and is adapted to be connected to the boat engine cooling system with elongate fins secured to the bottom of the outside of the body and axially aligned with the longitudinal axis of the boat. The hollow interior of the body including a serpentine passageway between the inlet and outlet thereby increasing the heat exchange area in contact with the engine cooling liquid. Elongate cooling fins secured to the interior of the bottom of the body for increasing the cooling surface.
Inventors
- 👤 Ezra E Childress
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:03
CPC Classifications
B; B63; B63H; B63H20/00; B63H20/28; B63H20/285; B63B; B63B39/00; B63B39/06; B63B39/061; B63H20/24; B63H20/245; B63H21/00; B63H21/12; B63H21/14; B63H21/38; F; F28; F28D; F28D1/00; F28D1/02; F28D1/0206; F28D1/022; F28F; F28F3/00; F28F3/12; B63H21/02; B63H21/10
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
93 words
A combination boat trim tab and heat exchanger for an engine driven boat comprising, a generally horizontally positioned trim tab body having means adapting said body to be secured to a boat and having a hollow interior, an inlet and an outlet connected to the interior of the body and spaced from each other and adjacent opposite sides and adapted to be connected to the boat engine cooling system, and elongate cooling fins secured to the bottom of the outside of the body and axially aligned with the longitudinal axis of the boat.
Claim 2
Dependent Claim
93 words
A combination boat trim tab and heat exchanger for an engine driven boat comprising, a generally horizontally positioned trim tab body having means adapting said body to be secured to a boat and having a hollow interior, an inlet and an outlet connected to the interior of the body and spaced from each other and adjacent opposite sides and adapted to be connected to the boat engine cooling system, and elongate cooling fins secured to the bottom of the outside of the body and axially aligned with the longitudinal axis of the boat.
Claim 3
Dependent Claim
33 words
The apparatus of claim 1 including, said hollow interior of the body having a serpentine passageway between the inlet and outlet thereby increasing the heat exchange area of the cooling liquid flowing therein.
Claim 4
Dependent Claim
19 words
The apparatus of claim 1 including, elongate cooling fins secured to the interior of the bottom of the body.
Claim 5
Dependent Claim
137 words
A combination boat trim tab and heat exchanger for an engine driven boat comprising, a flat bottom generally horizontally positioned trim tab body having means adapting said body to be secured to a boat, said body being hollow and including an inlet and an outlet connected to the interior of the body and spaced from each other and adjacent opposite sides and adapted to be connected to the boat engine cooling system, said hollow interior of the body including a serpentine passageway between the inlet and outlet thereby increasing the heat exchange cooling area between the cooling liquid and the body, elongate fins secured to the bottom of the outside of the body and axially aligned with the longitudinal axis of the boat, and elongate cooling fins secured to the interior of the bottom of the body.
Claim 6
Dependent Claim
137 words
A combination boat trim tab and heat exchanger for an engine driven boat comprising, a flat bottom generally horizontally positioned trim tab body having means adapting said body to be secured to a boat, said body being hollow and including an inlet and an outlet connected to the interior of the body and spaced from each other and adjacent opposite sides and adapted to be connected to the boat engine cooling system, said hollow interior of the body including a serpentine passageway between the inlet and outlet thereby increasing the heat exchange cooling area between the cooling liquid and the body, elongate fins secured to the bottom of the outside of the body and axially aligned with the longitudinal axis of the boat, and elongate cooling fins secured to the interior of the bottom of the body.
Claim 7
Dependent Claim
17 words
The apparatus of claim 4 wherein the interior cooling fins are generally aligned with the serpentine passageway.
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) | 1975-03-21 | 1975-09-20 | 1976-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-21 | 1979-09-20 | 1980-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-21 | 1983-09-20 | 1984-03-21 | $7700.00 | Window Closed / Lapsed |