发明授权
US5970657A Self closing sliding access door 失效
自锁滑动门

Self closing sliding access door
摘要:
The present invention is directed to an automatically closing and locking door adapted for use in drive through and walk up facilities. The door rides on an inclined track and closes due to gravity. The door locks automatically upon the coupling of a hooked door latch with a cooperative hooked door base. The door is unlocked and opened by application of a lateral force upon the knob of the hooked door latch. A spring attached to the foot of the base is caused to exert a force against the door thereby coupling the hooked door latch and hooked door base.
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