Re-keyable cylinder lock
AssigneeTong Lung Metal Industry Co., Ltd.
InventorsWei-Liang Chiang, Ju-Lin Yang, Cheng-Chung Liu, Kun-Chen Lee, Song-Gen Shyu, Ching-Chuan Kuo
Life of this patent
Estimating the term…
Abstract
A re-keyable cylinder lock has a control member to permit or restrict transverse movement of a re-keying unit. The control member is movable axially between first and second positions and transversely to a third position from the second position. In the third position, the re-keying unit moves transversely and disengages from first tumbler pieces. A limit member is provided to prevent the control member from moving axially when no right key is inserted into a plug. A security arm is connected to the control member and is breakable so that destructive forces cannot reach the control member.
Claims23
A re-keyable cylinder lock comprising:
- a lock housing defining a longitudinal axis and having a plug hole, a cavity communicated with said plug hole, and a guide hole communicated with said cavity, wherein said cavity interposes the guide hole and the plug hole;
- a plug disposed within said plug hole, and including a first tumbler piece that has a toothed part;
- a re-keying unit that has a gear wheel, and a gear holder holding said gear wheel, said gear wheel engaging releasably said toothed part and movable transversely of said longitudinal axis so as to engage and disengage from said toothed part;
- and
- a control member disposed inside said cavity to permit or restrict transverse movement of said re-keying unit, said control member being movable axially between a first position and a second position, said control member moving transversely to a third position when reaching said second position, said control member extending into said guide hole when moving to said third position;
- said gear wheel and said gear holder moving transversely away from said toothed part when said control member moves to said third position.
A re-keyable cylinder lock, comprising:
- a lock housing;
- a plug disposed in said lock housing and having a first tumbler piece that has a toothed part;
- a re-keying unit engaging said toothed part and movable to disengage from said toothed part;
- and
- a control member disposed inside said lock housing to permit or restrict a movement of said re-keying unit, said control member having a security arm that projects from a front end of said control member near a front end of said lock housing, and that is operable manually through said front end of said lock housing to move said control member so that said re-keying unit is permitted to disengage from said toothed part, said security arm being breakable to separate from said front end of said control member, thereby preventing an external force from reaching said control member.
A re-keyable cylinder lock comprising:
- a lock housing defining a longitudinal axis and having a plug hole, and a cavity communicated with said plug hole;
- a plug disposed within said plug hole, and including a first tumbler piece that has a toothed part;
- a re-keying unit engaging releasably said toothed part and movable transversely of said longitudinal axis to disengage from said toothed part;
- and
- a control member disposed in said cavity to permit or restrict transverse movement of said re-keying unit, said control member being movable axially between a first position and a second position within said cavity, said control member moving transversely to a third position when reaching said second position;
- wherein said re-keying unit moves transversely away from said toothed part when said control member moves transversely, and said control member is disposed outside said plug and does not rotate along with said plug.
A re-keyable cylinder lock comprising:
- a lock housing defining a longitudinal axis and having a plug hole, and a cavity communicated with said plug hole;
- a plug disposed within said plug hole, and including a first tumbler piece that has a toothed part;
- a re-keying unit having a gear wheel engaging releasably said toothed part;
- and
- a control member disposed in said cavity to control said re-keying unit, said control member being movable axially between a first position and a second position within said cavity, said control member moving transversely to a third position when reaching said second position;
- wherein, when said control member moves transversely to said third position, said gear wheel and said toothed part make a relative movement in a direction transverse to said longitudinal axis and disengage from each other;
- and
- wherein said control member is disposed outside said plug and does not rotate along with said plug.
Dependencies are inferred from the claim text.