US3878809A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air-cooled electric outboard motor
Assignee: Individual
•
Filing: 1974-02-14
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Granted: 1975-04-22
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Expires: 1994-02-14
Abstract
Abstract An air-cooled electric outboard motor includes a power unit having air intake and exhaust ports shielded from the weather by being provided in a bottom wall of a housing for the power unit. An electric motor having a cylindrical housing is mounted vertically in the housing. The motor includes an output shaft passing through the bottom of the power unit for driving a propeller type lower drive unit. The motor has top and bottom end bell housings with radially facing inflow and outflow orifices respectively and a centrifugal fan is mounted on the output shaft radially within the bottom bell housing. Baffle plates extend upward from the bottom of the housing between the intake and exhaust ports. Speed control components are mounted on the baffle plates and the plates are so positioned to direct air entering the intake ports to flow upward over the speed control components. A directive shroud around the bottom end bell causes the outflow orifices of the motor to communicate with the exhaust ports, while the inflow orifices are in communication with the intake ports by means of the enclosed interior of the power unit housing. The fan drives the dual pass circulating air flow within the power unit, first passing upward over the speed control components and then downward through the motor.
Inventors
- 👤 Morton Ray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:49
CPC Classifications
H; H02; H02K; H02K23/00; H02K23/66; H02K9/00; H02K9/02; H02K9/04; H02K9/06; F; F02; F02B; F02B61/00; F02B61/04; F02B61/045
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
216 words
In an electrical outboard motor apparatus including a propeller drive means, an air cooled power unit apparatus drivingly positioned above said drive means including an electric motor vertically oriented within a housing, and said motor with an output shaft in driving relationship to said propeller means, wherein the improvement comprises: a set of air port means for intake in the bottom wall of said housing and another set of air port means foR exhaust in the bottom wall of said housing; upper and lower orifice means in said motor permitting air flow through said motor; said lower orifice means in communication with one of said sets of air port means; the other of said sets of air port means being located in the bottom wall of the chamber formed by the inside walls of said housing and the outside walls of said motor; said upper orifice means being in communication with said chamber; a fan mounted upon and driven by the shaft of said motor causing forced air circulation through said air port means, said orifice means, said motor, and said chamber, thereby providing dual pass cooling air flow; and ancillary speed control components necessary for controlling said electric motor mounted within said chamber where said speed control components are cooled by said forced air circulation.
Claim 2
Dependent Claim
216 words
In an electrical outboard motor apparatus including a propeller drive means, an air cooled power unit apparatus drivingly positioned above said drive means including an electric motor vertically oriented within a housing, and said motor with an output shaft in driving relationship to said propeller means, wherein the improvement comprises: a set of air port means for intake in the bottom wall of said housing and another set of air port means foR exhaust in the bottom wall of said housing; upper and lower orifice means in said motor permitting air flow through said motor; said lower orifice means in communication with one of said sets of air port means; the other of said sets of air port means being located in the bottom wall of the chamber formed by the inside walls of said housing and the outside walls of said motor; said upper orifice means being in communication with said chamber; a fan mounted upon and driven by the shaft of said motor causing forced air circulation through said air port means, said orifice means, said motor, and said chamber, thereby providing dual pass cooling air flow; and ancillary speed control components necessary for controlling said electric motor mounted within said chamber where said speed control components are cooled by said forced air circulation.
Claim 3
Dependent Claim
216 words
In an electrical outboard motor apparatus including a propeller drive means, an air cooled power unit apparatus drivingly positioned above said drive means including an electric motor vertically oriented within a housing, and said motor with an output shaft in driving relationship to said propeller means, wherein the improvement comprises: a set of air port means for intake in the bottom wall of said housing and another set of air port means foR exhaust in the bottom wall of said housing; upper and lower orifice means in said motor permitting air flow through said motor; said lower orifice means in communication with one of said sets of air port means; the other of said sets of air port means being located in the bottom wall of the chamber formed by the inside walls of said housing and the outside walls of said motor; said upper orifice means being in communication with said chamber; a fan mounted upon and driven by the shaft of said motor causing forced air circulation through said air port means, said orifice means, said motor, and said chamber, thereby providing dual pass cooling air flow; and ancillary speed control components necessary for controlling said electric motor mounted within said chamber where said speed control components are cooled by said forced air circulation.
Claim 4
Dependent Claim
216 words
In an electrical outboard motor apparatus including a propeller drive means, an air cooled power unit apparatus drivingly positioned above said drive means including an electric motor vertically oriented within a housing, and said motor with an output shaft in driving relationship to said propeller means, wherein the improvement comprises: a set of air port means for intake in the bottom wall of said housing and another set of air port means foR exhaust in the bottom wall of said housing; upper and lower orifice means in said motor permitting air flow through said motor; said lower orifice means in communication with one of said sets of air port means; the other of said sets of air port means being located in the bottom wall of the chamber formed by the inside walls of said housing and the outside walls of said motor; said upper orifice means being in communication with said chamber; a fan mounted upon and driven by the shaft of said motor causing forced air circulation through said air port means, said orifice means, said motor, and said chamber, thereby providing dual pass cooling air flow; and ancillary speed control components necessary for controlling said electric motor mounted within said chamber where said speed control components are cooled by said forced air circulation.
Claim 5
Dependent Claim
57 words
The apparatus in claim 1 wherein said fan is a centrifugal fan and said exhaust orifice means is annular, said motor having top and bottom end bell housings, said exhaust port means being located at the bottom of said housing to receive the exhaust air from said exhaust orifice means formed in said bottom end bell housing.
Claim 6
Dependent Claim
37 words
The apparatus of claim 2 wherein said bottom end bell housing includes support ear means spaced radially outward from said fan and spaced horizontal baffle plates supported between said ear means forming said annular exhaust orifice means.
Claim 7
Dependent Claim
29 words
The apparatus of claim 3 wherein said exhaust port means extend radially inward beneath said horizontal baffle plates whereby maximum air flow and tortuous path isolation may be obtained.
Claim 8
Dependent Claim
31 words
The apparatus of claim 4 wherein is provided mounting rods passing through said power unit housing and interconnecting to the end bell housings of said motor and to said cover portion.
Claim 9
Dependent Claim
45 words
The apparatus of claim 1 wherein directing means is provided in the form of baffle means extending vertically upward from the bottom of said housing and positioned between said intake and exhaust port means, whereby increased air flow over said speed control components is obtained.
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) | 1978-04-21 | 1978-10-21 | 1979-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-21 | 1982-10-21 | 1983-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-21 | 1986-10-21 | 1987-04-22 | $7700.00 | Window Closed / Lapsed |