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US 12,577,809 B2Granted
Lock apparatuses with secondary locking mechanisms
AssigneeSchlage Lock Company LLC
InventorsManjunatha Ramakrishna, Arjun S. Kunnath, Adithya Gangadhar Shetty, Ramamohan Bhaskar Shettigar
Life of this patent
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Abstract
A lock apparatus generally includes a connecting portion, a housing, a primary lock, and a secondary lock. The connecting portion is engageable to the housing with a bolt assembly, and the primary lock locks the bolt assembly in the engaged position. The secondary lock arrests the bolt assembly in the engaged and locked condition in response to an attack that displaces the primary lock from a nominal configuration.
Claims16
A lock apparatus, comprising:
- a connecting portion positionable around one or more objects to be locked, the connecting portion including a first foot and a second foot;
- and
- a housing connected to the first foot and to the second foot, wherein the housing includes:
- a bolt movably mounted in the housing for movement between a locked position in which the bolt is engaged to the first foot, and an unlocked position in which the bolt is movable to disengage from the first foot;
- a primary lock having a nominal configuration on the housing, wherein in the nominal configuration the primary lock is movable between a locked condition in which the primary lock maintains the bolt in the locked position, and an unlocked condition in which the bolt is operable to move from the locked position, wherein the primary lock is a dial-based combination lock including a plurality of dials movable around a rotation axis between the locked condition and the unlocked condition while in the nominal configuration;
- and
- a secondary lock mounted in the housing, the secondary lock configured to arrest the bolt in the locked condition in response to forcible displacement of the primary lock from the nominal configuration, wherein the secondary lock includes a blocking device and a plunger engaged to the blocking device, wherein the plunger is biased into engagement with the at least one of the plurality of dials, and the blocking device is biased toward the bolt, and wherein the plunger and the blocking device have:
- a first position in which the plunger is engaged with at least one of the plurality of dials to maintain the plunger and blocking device in the first position;
- and
- a second position in which forcible displacement of one or more of the plurality of dials from the nominal configuration disengages the plunger from the blocking device to allow the blocking device to move to a position that arrests the bolt in the locked condition.
7 more elements
A lock apparatus, comprising:
- a connecting portion positionable around one or more objects to be locked, the connecting portion including a first foot and a second foot;
- and
- a housing connected to the first foot and to the second foot, wherein the housing includes:
- a first bolt movably mounted in the housing for movement between a locked position in which the first bolt is engaged to the first foot, and an unlocked position in which the first bolt is movable to disengage from the first foot;
- a second bolt movably mounted in the housing for movement between a locked position in which the second bolt is engaged to the second foot, and an unlocked position in which the second bolt is movable to disengage from the second foot;
- a primary lock having a nominal configuration on the housing, wherein in the nominal configuration the primary lock is movable between a locked condition in which the primary lock maintains the first bolt in the locked position, and an unlocked condition in which the first bolt is operable to move from the locked position;
- and
- a secondary lock mounted in the housing, the secondary lock configured to arrest the first bolt in the locked condition in response to forcible displacement of the primary lock from the nominal configuration.
5 more elements
A lock apparatus, comprising:
- a connecting portion for positioning around one or more objects to be locked, the connecting portion having first and second ends;
- a housing that is connected to the first and second ends, at least one of the first and second ends being removably engaged to the housing with a movable bolt assembly housed in the housing;
- a primary lock having a nominal configuration relative to the housing, wherein the primary lock is movable between a locked condition in which the primary lock maintains the bolt assembly in a locked position in engagement with the at least one of the first and second ends, and an unlocked condition in which the bolt assembly is operable to move from the locked position to disengage the at least one of the first and second ends, and wherein the primary lock is a dial-based combination lock including a plurality of dials movable around a rotation axis between the locked condition and the unlocked condition while in the nominal configuration;
- and
- a secondary lock in the housing, the secondary lock configured to arrest the bolt assembly in the locked position in response to failure of the primary lock in maintaining the bolt assembly in the locked position, wherein:
- the secondary lock includes a blocking device and a plunger engaged to the blocking device;
- the plunger and the blocking device have a first position in which the plunger is engaged with at least one of the plurality of dials to maintain the plunger and the blocking device in the first position;
- and
- the plunger and the blocking device have a second position in which forcible displacement of one or more of the plurality of dials from the nominal configuration disengages the plunger from the blocking device to allow the blocking device to move to a position that arrests the bolt assembly in the locked condition, and wherein the plunger is biased into engagement with the at least one of the plurality of dials and the blocking device is biased toward the bolt assembly.
6 more elements
Dependencies are inferred from the claim text.