Rotary combustion engine damped apex seal

An internal combustion rotary engine comprising a rotor housing, a rotor having apex seals sliding on said rotor housing as the rotor rotates, and a free-ended beam freely secured at opposite ends to each said apex seal having a natural frequency substantially equal to the frequency of said rotor housing excited by the engine firing cycle whereby there is effected a nodal drive to dampen apex seal vibration caused by said rotor housing.

An internal combustion rotary engine comprising a rotor housing, a rotor having apex seals sliding on said rotor housing as the rotor rotates, and damper means secured to each said apex seal having a natural frequency substantially equal to the bending frequency of the apex seal determined by its own weight whereby there is effected a nodal drive to dampen apex seal vibration caused by apex seal bending.

An internal combustion rotary engine comprising a rotor housing, a rotor having apex seals sliding on said rotor housing as the rotor rotates, and a free-ended beam with a center weight freely secured at opposite ends to each said apex seal having a natural frequency substantially equal to the bending frequency of the apex seal determined by its own weight whereby there is effected a nodal drive to dampen apex seal vibration caused by apex seal bending.

An internal combustion rotary engine comprising a rotor housing, a rotor having apex seals sliding on said rotor housing as the rotor rotates, first damper means secured to each said apex seal having a natural frequency substantially equal to the frequency of said rotor housing excited by the engine firing cycle whereby there is effected a nodal drive to dampen apex seal vibration caused by said rotor housing, and second damper means secured to each said apex seal having a natural frequency higher than the natural frequency of said first damper means and substantially equal to the bending frequency of the apex seal determined by its own weight whereby there is effected a nodal drive to dampen apex seal vibration caused by apex seal bending.

An internal combustion rotary engine comprising a rotor housing, a rotor having apex seals sliding on said rotor housing as the rotor rotates, a free-ended beam freely secured at opposite ends to each said apex seal having a natural frequency about equal to the frequency of said rotor housing excited by the engine firing cycle whereby there is effected a nodal drive to dampen apex seal vibration caused by said rotor housing, and a free-ended beam with a center weight freely secured at opposite ends to each said apex seal having a natural frequency higher than the natural frequency of said first mentioned free-ended beam and substantially equal to the bending frequency of the apex seal determined by its own weight whereby there is effected a nodal drive to dampen apex seal vibration caused by apex seal bending.