초록 ▼

The present invention provides a door lock assembly and method which will provide security for building owners and dwellers and will result in a reduction of property damage and loss by burglars. The door lock assembly includes a tumbler type cylinder which can be rotated by a key from the outside t

The present invention provides a door lock assembly and method which will provide security for building owners and dwellers and will result in a reduction of property damage and loss by burglars. The door lock assembly includes a tumbler type cylinder which can be rotated by a key from the outside to lock a door or other closure to which it is fitted to a first position whereupon the handle inside the door cannot be used to unlatch the lock from the inside. Also, the door can be locked and thereafter the cylinder can be rotated by turning the key in the reverse direction whereupon the door remains locked but upon withdrawing the key the door can be opened from the inside with the handle. Thus, after locking, the key can be withdrawn in either of two cylindrical positions depending on whether the user wants the door to be able to be opened from the inside by use of the handle.

대표청구항 ▼

A key operated lock assembly for a patio sliding door having first and second locking positions for engaging a catch means comprising: a cylinder means, a cam wheel means, said cam wheel means including a lug member, said cam wheel means joined to said cylinder means, said cylinder means defining a

A key operated lock assembly for a patio sliding door having first and second locking positions for engaging a catch means comprising: a cylinder means, a cam wheel means, said cam wheel means including a lug member, said cam wheel means joined to said cylinder means, said cylinder means defining a key receiving slot, a latch member, said latch member for engaging said catch means, said latch member having a semi-circular lug slot, said lug member slidably received in said semi-circular lug slot, an independent rotatable handle member, said handle member rigidly joined to a shaft, said shaft joined to said latch member for rotation therewith, said cylinder means including a tumbler element and a shoulder stud, a first support means, said cylinder means mounted on said first support means, said first support means defining a plurality of tumbler receiving grooves, said shaft having an extension means, said extension means including an axle member, said shoulder stud receiving said axle member, said cylinder means being rotatable to a first locking position by a key for moving said lug member to one end of said semi-circular slot urging said latch member into engagement with the catch means whereat said handle member cannot be rotated and said cylinder means being rotatable to a second locking position by a key for moving said lug member to said other end of said semi-circular slot whereat said handle member can be rotated to disengage said latch member from said catch means.