Cord locking device with safety latch

Claim 2

A cord lock comprising a body containing a passage through which at least one cord is to extend and having a restricted locking portion; a locking unit located at least partially within said passage and movable between a locking position in which said unit clamps said cord tightly against a wall of the passage, and locks the cord against longitudinal movement toward a predetermined first end of said passage and a retracted position permitting such movement; and means for releasably retaining said locking unit in said locking position relative to said body and against movement to said retracted position; said retaining means including a first shoulder on said locking unit engageable with a coacting second shoulder on said boyd in a relation releasably retaining said locking unit in said locking position relative to the body; there being an additional shoulder formed on said locking unit and spaced from said first mentionEd shoulder and engageable with said second shoulder to limit retracting movement of the locking unit in said retracted position thereof; said first shoulder being movable out of engagement with and past said second shoulder by predetermined cocking movement of said unit relative to said body; said additional shoulder projecting outwardly from said locking unit farther than said first shoulder in a relation preventing movement of said additional shoulder out of engagement with and past said second shoulder by cocking movement of said unit relative to said body to the same angularity which releases said first shoulder from said second shoulder.

Claim 3

A cord lock comprising a body containing a passage through which at least one cord is to extend and having a restricted locking portion; a locking unit located at least partially within said passage and movable between a locking position in which said unit clamps said cord tightly against a wall of the passage, and locks the cord against longitudinal movement toward a predetermined first end of said passage and a retracted position permitting such movement; and means for releasably retaining said locking unit in said locking position relative to said body and against movement to said retracted position; said body having two generally parallel front and rear walls between which said passage is formed; said retaining means including a lug projecting from said locking unit into a slot formed in a first of said walls and having a shoulder engageable with a shoulder in said slot in a relation retaining said unit in said locking position; the second of said walls being foreably and resiliently deformable away from said first wall by cocking movement of said locking unit and to an extent permitting movement of said shoulder out of engagement with and past shoulder in the slot to release the locking unit to retracted position; said lug having a second shoulder spaced from said first shoulder and engageable with said shoulder in said slot in said retracted position of the locking unit to prevent further retracting movement thereof; said second shoulder being stepped outwardly away from said locking unit farther than said first shoulder to a position preventing movement of said second shoulder out of engagement with said shoulder in the slot by the same deformation of said second wall and the same cocking movement of said locking unit which releases said first shoulder from engagement with said shoulder in the slot.

Claim 4

A cord lock comprising a body containing a passage through which at least one cord is to extend and having a restricted locking portion; a locking unit located at least partially within said passage and movable between a locking position in which said unit clamps said cord tightly against a wall of the passage, and locks the cord against longitudinal movement toward a predetermined first end of said passage and a retracted position permitting such movement; and means for releasably retaining said locking unit in said locking position relative to said body and against movement to said retracted position; said body having two generally parallel front and rear walls between which said passage is formed; said retaining means including a lug projecting from said locking unit into a slot formed in a first of said walls and having a shoulder engageable with a shoulder in said slot in a relation retaining said unit in said locking position; the second of said walls being foreably and resiliently deformable away from said first wall by cocking movement of said locking unit and to an extent permitting movement of said shoulder out of engagement with and past shoulder in the slot to release the locking unit to retracted position; said lug having a second shoulder spaced from said first shoulder and engageable with said shoulder in said slot in said retracted position of the locking unit to prevent further retracting movement thereof; said second shoulder being stepped outwardly away from said locking unit farther than said first shoulder to a position preventing movement of said second shoulder out of engagement with said shoulder in the slot by the same deformation of said second wall and the same cocking movement of said locking unit which releases said first shoulder from engagement with said shoulder in the slot.

Claim 5

A cord lock comprising a body containing a passage through which at least one cord is to extend; a locking unit located at least partially within said passage and movable therein relative to said body between a locking position in which said unit bears tightly against said cord and holds it against longitudinal movement toward a predetermined first end of said passage, and an unlocked position permitting such movement; first stop means for retaining said unit in said locking position and against retracting movement relative to the body from said locking position to said unlocked position, but releasable to permit said retracting movement; and additional stop means for limiting said retracting movement of the unit in said unlocked position and blocking further retracting movement in a relation maintaining said unit against complete separation from the body, said first stop means including a shoulder on said locking unit engageable with a coacting shoulder on said body in a relation releasably retaining said locking unit in said locking position relative to the body, said additional stop means including an additional shoulder formed on said locking unit and spaced from said first mentioned shoulder and engageable with said second mentioned shoulder to limit retracting movement of the locking unit in said unlocked position thereof.

Claim 6

A cord lock comprising a body containing a passage through which at least one cord is to extend; a locking unit located at least partially within said passage and movable therein relative to said body between a locking position in which said unit bears tightly against said cord and holds it against longitudinal movement toward a predetermined first end of said passage, and an unlocked position permitting such movement; first stop means for retaining said unit in said locking position and against retracting movement relative to the body from said locking position to said unlocked position, but releasable to permit said retracting movement; and additional stop means for limiting said retracting movement of the unit in said unlocked position and blocking further retracting movement in a relation maintaining said unit against complete separation from the body, said first stop means including a shoulder on said locking unit engageable with a coacting shoulder on said body in a relation releasably retaining said locking unit in said locking position relative to the body, said additional stop means including an additional shoulder formed on said locking unit and spaced from said first mentioned shoulder and engageable with said second mentioned shoulder to limit retracting movement of the locking unit in said unlocked position thereof.

Claim 7

A cord lock as recited in claim 3, in which said body has two generally parallel front and rear walls between which said passage is formed; said first stop means including a lug projecting fRom said locking unit into a slot formed in a first of said walls and carrying said first mentioned shoulder; the second of said walls being forceably and resiliently deformable away from said first wall by cocking movement of said locking unit and to an extent permitting movement of said first mentioned shoulder out of engagement with and past said second mentioned shoulder in the slot to release the locking unit to unlocked position.

Claim 8

A cord lock comprising a body containing a passage through which at least one cord is to extend; a locking unit located at least partially within said passage and movable therein relative to said body between a locking position in which said unit bears tightly against said cord and holds it against longitudinal movement toward a predetermined first end of said passage, and an unlocked position permitting such movement; first stop means for retaining said unit in said locking position and against retracting movement relative to the body from said locking position to said unlocked position, but releasable to permit said retracting movement; and additional stop means for limiting said retracting movement of the unit in said unlocked position and blocking further retracting movement in a relation maintaining said unit against complete separation from the body, said first stop means including lug means projecting from said locking unit into a slot in said body and having a shoulder engageable with an end of said slot to releasably retain said unit in said locking position relative to said body but movable out of engagement with said end of the slot to permit retracting movement of said unit, said additional stop means including a second shoulder on said lug means then engageable with said end of the slot in said unlocked position of said locking unit to prevent further retracting movement thereof.

Claim 9

A cord lock comprising a body containing a passage through which at least one cord is to extend; a locking unit located at least partially within said passage and movable therein relative to said body between a locking position in which said unit bears tightly against said cord and holds it against longitudinal movement toward a predetermined first end of said passage, and an unlocked position permitting such movement; first stop means for retaining said unit in said locking position and against retracting movement relative to the body from said locking position to said unlocked position, but releasable to permit said retracting movement; and additional stop means for limiting said retracting movement of the unit in said unlocked position and blocking further retracting movement in a relation maintaining said unit against complete separation from the body, said first stop means including lug means projecting from said locking unit into a slot in said body and having a shoulder engageable with an end of said slot to releasably retain said unit in said locking position relative to said body but movable out of engagement with said end of the slot to permit retracting movement of said unit, said additional stop means including a second shoulder on said lug means then engageable with said end of the slot in said unlocked position of said locking unit to prevent further retracting movement thereof.

Claim 10

A cord lock comprising a body part containing a passage through which at least one cord is to extend; a locking part located at least partially within said passage and movable therein relative to said body part between a locking position in which said locking part bears tightly against said cord and holds it against longitudinal movement toward a predetermined first end of said passage, and an unlocked position permitting such movement; a first stop shoulder carried by one of said parts and engageable with the other part in a relation retaining said locking part in said locking position and against movement in a retracting direction relative to the body from said locking position to said unlocked position, but releasable to permit retracting movement; and an additional stop shoulder connected to said first shoulder but spaced therefrom longitudinally of the path of movement of said locking part and engageable with said other part in a relation limiting said retracting movement of the locking part in said unlocked position and blocking further retracting movement and thereby maintaining said locking part against complete separation from the body part.

Claim 11

A cord lock comprising a body part containing a passage through which at least one cord is to extend; a locking part located at least partially within said passage and movable therein relative to said body part between a locking position in which said locking part bears tightly against said cord and holds it against longitudinal movement toward a predetermined first end of said passage, and an unlocked position permitting such movement; a first stop shoulder carried by one of said parts and engageable with the other part in a relation retaining said locking part in said locking position and against movement in a retracting direction relative to the body from said locking position to said unlocked position, but releasable to permit retracting movement; and an additional stop shoulder connected to said first shoulder but spaced therefrom longitudinally of the path of movement of said locking part and engageable with said other part in a relation limiting said retracting movement of the locking part in said unlocked position and blocking further retracting movement and thereby maintaining said locking part against complete separation from the body part.

Claim 12

A cord lock as recited in claim 6, in which one of said parts is forcibly deformable in a relation enabling movement of said first shoulder relative to said other part to a released position permitting retracting movement of the locking part toward said unlocked position.

Claim 13

A cord as recited in claim 6, in which said locking part has a lug received within a slot formed in said body part and carrying said shoulder.

Claim 14

A cord lock as recited in claim 6, in which said locking part has a lug received within a slot formed in said body part and carrying said shoulders, said body part being forcibly deformable by said locking part to a position enabling movement a portion of said lug out of said slot and thereby permitting retracting movement of said locking part from said locking position toward said unlocked position.