Bizarre Patents
A method of swing on a swing is disclosed, in which a user positioned on a standard swing suspended by two chains from a substantially horizontal tree branch induces side to side motion by pulling alternately on one chain and then the other.
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| Number | Title | Issue Date |
| 7267091 | Dynamic effortless pull starting An energy storing recoil starter includes a buffering component to reduce a pull effort when starting an engine. The energy storing recoil starter includes a starter housing coupled to an engine shaft of the engine and a starter pulley. A clutch assembly is coupled ... | 09/11/2007 |
| 4957072 | Balanced radial engine A low cost multi cylinder radial aircraft engine is composed of an even number of individually functional, single cylinder slider crank model engines. They are mounted to a plate to form equally spaced radially oriented cylinders. In the preferred embodim... | 09/18/1990 |
| 4651688 | Model airplane engine starter and drive train A model internal-combustion engine having a rotatable shaft driven by an engine, a propeller secured to said shaft, and a combined self-starting mechanism and propeller drive in the form of a plastic cylindrical connector mounted coaxially on the shaft wi... | 03/24/1987 |
| 4440122 | Model airplane engine starter A model internal-combustion engine having a rotatable shaft driven by an engine, a propeller secured to said shaft, and a self-starting mechanism in the form of a cylindrical hub mounted coaxially on the shaft against the propeller and having at one end a... | 04/03/1984 |
| 4335318 | Engine-driven model toy An engine-driven model toy having an engine, an electric motor connected to the engine and a power source battery, and characterized in that the electric motor, powered by the battery, drives the engine at the start of the engine while, during the continu... | 06/15/1982 |
| 4331110 | Priming and starting apparatus for engines Disclosed are apparatus and methods for priming and starting a two-cycle engine. A spool is drivingly coupled to the engine crankshaft. The intermediate portion of a cord is wrapped at least once about the spool leaving opposite ends of the cord free. To ... | 05/25/1982 |
| 3939369 | Housing for starter motor A housing is provided for hand-held starter motors, such as those commonly in use for starting model airplanes by imparting a torque to the spinner or nose cone of the airplane. The housing is provided with a guard to protect the hand holding the motor du... | 02/17/1976 |
