Patent ID: 11913256
Assignee: nan
Field: Civil engineering (Other fields)
Classification: CPC E  G | IPC E  G

Claim 19:
20. A combination lock, comprising:
a housing;
a knob disposed on a front side of the housing and rotatable between a first knob position in which the combination lock is in a closed position and a second knob position in which the combination lock is in an open position;
a drive shaft operatively coupled to the knob;
a locking element disposed on a back side of the housing and operatively coupled to the drive shaft;
one or more rotatable selectors each having multiple indicia disposed thereon, wherein rotation of the one or more rotatable selectors to predetermined indicia is configured to selectively place the combination lock in a locked position and an unlocked position;
wherein when the combination lock is in the unlocked position, rotation of the knob causes rotation of the drive shaft to selectively place the combination lock in the closed position and the open position;
one or more cam wheels, each cam wheel operatively connected to a respective rotatable selector, each cam wheel having a periphery comprising a curved surface and a flat surface;
a lock plate slidable in a direction parallel to the plane of rotation of the knob, the lock plate comprising one or more linear bearing surface, wherein when the flat surfaces of each cam wheel engage each respective linear bearing surface, the lock plate is configured to slide parallel to the plane of rotation of the knob and place the combination lock in the unlocked position; and
an indicator window, the combination lock further comprising an indicator operatively coupled to the lock plate, wherein the indicator includes a first surface visible through the indicator window in the unlocked position and a second surface visible through the indicator window differentiable from the first surface in the locked position.