Patent US3789792A successfully refreshed from Google Patents.
US3789792A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motorized swimming aid
Assignee: Individual
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Filing: 1972-02-03
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Granted: 1974-02-05
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Expires: 1992-02-03
Abstract
Abstract A motorized swimming aid including a boat shaped hull with a pair of handles at the rear end thereof to be grasped by a swimmer and be pulled along the surface of the water. The center of gravity of the swimming aid is located within the hull laterally aligned with and longitudinally spaced from the center of buoyancy to generate a moment of force on the hull to lift the handles out of the water. A motor is attached to the hull to generate a moment of force on the hull when it is operating to force the handles toward the surface of the water. The motor is powered by two batteries selectively connectable to the motor in parallel or in series to vary the operating speed of the motor.
Inventors
- 👤 D Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:14
CPC Classifications
A; A63; A63B; A63B35/00; A63B35/08; A63B35/12
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
317 words
A motorized swimming aid including: a boat shaped hull comprising: a bottom skin defining the outer shape of said hull and an open top cavity therein; a liner assembly positioned to close said cavity and defining an open top battery receiving recess therein; a pair of spaced apart handles at the rear end of said hull, said bottom skin and liner assembly defining a cutout just forward of each of said handles to allow said handles to be grasped, one of said handles including a power switch positioned in said handle adapted to be actuated when said handle is grasped; a buoyant foamed plastic material filling said cavity between said bottom skin and said liner assembly; and, a hatch selectively closing said battery receiving recess; drive means comprising: an electric trolling unit having a propeller operatively associated therewith; a support member positioned in said hull and projecting therebelow at the forward end thereof, said support member mounting said trolling unit under the forward end of said hull so that the centerline of said unit is substantially vertically aligned with, spaced below, and generally parallel to the longitudinal certerline of said hull for moving said aid through the water; and electrical storage battery means carried within said battery receiving recess, said aid having a center of gravity and center of buoyancy, the center of gravity and center of buoyance longitudinally spaced and laterally aligned to generate a first moment of force on said hull when said hull is placed in the water to cause said handle means to be lifted from the water, said trolling unit exerting a second moment of force on said hull opposite to the first moment of force to lower said handles toward the water when said trolling unit is operating, and said power switch selectively and operatively connecting said battery means to said trolling unit to operate same when said handle is grasped.
Claim 2
Dependent Claim
317 words
A motorized swimming aid including: a boat shaped hull comprising: a bottom skin defining the outer shape of said hull and an open top cavity therein; a liner assembly positioned to close said cavity and defining an open top battery receiving recess therein; a pair of spaced apart handles at the rear end of said hull, said bottom skin and liner assembly defining a cutout just forward of each of said handles to allow said handles to be grasped, one of said handles including a power switch positioned in said handle adapted to be actuated when said handle is grasped; a buoyant foamed plastic material filling said cavity between said bottom skin and said liner assembly; and, a hatch selectively closing said battery receiving recess; drive means comprising: an electric trolling unit having a propeller operatively associated therewith; a support member positioned in said hull and projecting therebelow at the forward end thereof, said support member mounting said trolling unit under the forward end of said hull so that the centerline of said unit is substantially vertically aligned with, spaced below, and generally parallel to the longitudinal certerline of said hull for moving said aid through the water; and electrical storage battery means carried within said battery receiving recess, said aid having a center of gravity and center of buoyancy, the center of gravity and center of buoyance longitudinally spaced and laterally aligned to generate a first moment of force on said hull when said hull is placed in the water to cause said handle means to be lifted from the water, said trolling unit exerting a second moment of force on said hull opposite to the first moment of force to lower said handles toward the water when said trolling unit is operating, and said power switch selectively and operatively connecting said battery means to said trolling unit to operate same when said handle is grasped.
Claim 3
Dependent Claim
53 words
The swimming aid of claim 1 wherein said storage battery means includes a plurality of storage batteries and wherein said drive means further includes a selector switch in series with said power switch for alternatively connecting said batteries to said trolling unit upon actuation of said power switch in parallel and in series.
Claim 4
Dependent Claim
76 words
The swimming aid of claim 2 wherein said liner assembly includes a deck skin conforming in shape to the top of said bottom skin and attached thereto to close said cavity, said deck skin defining an opening therethrough and including a support ledge about said opening, and a battery case defining said battery receiving recess, said battery case including a support flange engaged with said support ledge to removably support said battery case within said cavity.
Claim 5
Dependent Claim
64 words
The swimming aid of claim 3 wherein said one handle defines an opening therein, said power switch mounted within said opening, said one handle further including a driver movably mounted within said opening to actuate said power switch and a resilient sleeve member positioned around said handle and covering said driver yet allowing said driver to be manually moved to actuate said power switch.
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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) | 1977-02-04 | 1977-08-06 | 1978-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-04 | 1981-08-06 | 1982-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-04 | 1985-08-06 | 1986-02-05 | $7700.00 | Window Closed / Lapsed |