Patent ID: 9257105
Filing Date: 2016-02-09
CPC Classification: G10D

Claim Text:
1. A key mechanism for a wind-blown instrument comprising: a C# tone hole key configured to cover a C# tone hole when in a closed position, and movable between an open position and the closed position; a C# vent hole key configured to cover a C# vent hole when in a closed position, the C# vent hole key positioned adjacent to the C# tone hole key, and movable between an open position and the closed position; a touch key positioned to simultaneously move the C# tone hole key and C# vent hole key to the closed position when depressed, and movable between an open position and the closed position; a second tone hole key configured to cover a tone hole other than the C# tone hole when in a closed position; a mechanical connection between the second tone hole key and the C# tone hole key, such that when the second tone hole key is depressed, the C# tone hole key is also depressed; and a spring lever providing a mechanical communication between the second tone hole key and the C# vent hole key, such that when the second tone hole key is depressed, the C# vent hole key is opened, and wherein the spring lever may yield against a force of the touch key to close the C# vent hole key when the touch key is depressed.