| 摘要 |
A mechanical door closer ( 10 ) that includes a spring ( 20 ) mounted in a track ( 13 ) to urge the door ( 11 ) to a closed position. A brake assembly ( 24 ) controls that rate at which the door ( 11 ) closes. The brake assembly ( 24 ) includes a brake hub ( 25 ) that has ramp slots ( 32 ) that receive balls ( 33 ) that engage a braking shell ( 34 ) to cause the braking assembly ( 24 ) to frictionally engage the track ( 13 ) to thereby control movement of the door ( 11 ). |
