A two point lock includes two pivotally mounted security hooks having sliding faces that engage sliding faces of a spring-loaded mishandling pin when the mishandling pin is vertically extended and the security hooks are rotatably retracted. The mishandling pin is vertically retracted when it abuts a
A two point lock includes two pivotally mounted security hooks having sliding faces that engage sliding faces of a spring-loaded mishandling pin when the mishandling pin is vertically extended and the security hooks are rotatably retracted. The mishandling pin is vertically retracted when it abuts a jamb. When the mishandling pin is vertically retracted, the sliding faces disengage so that the security hooks can rotate to lock onto a striker on the jamb. Thus, the mishandling pin prevents the security hooks from being slammed into the striker before a door or a window is fully closed.
대표청구항▼
The invention claimed is: 1. A lock, comprising: a case; a first security hook pivotally mounted to the case to extend from and to retract within the case, the first security hook comprising a first sliding face; a second security hook pivotally mounted to the case to extend from and to retract wit
The invention claimed is: 1. A lock, comprising: a case; a first security hook pivotally mounted to the case to extend from and to retract within the case, the first security hook comprising a first sliding face; a second security hook pivotally mounted to the case to extend from and to retract within the case, the second security hook comprising a second sliding face; a spring-loaded mishandling pin comprising third and fourth sliding faces, wherein: the third and the fourth sliding faces engage the first and the second sliding faces, respectively, to prevent the first and the second security hooks from extending from the case when the mishandling pin is in an extended position and the first and the second security hooks are retracted; and the third and the fourth sliding faces disengage the first and the second sliding faces, respectively, to allow the first and the second security hooks to extend from the case when the mishandling pin is in a retracted position; a first drive rail slidably mounted in the case, the first drive rail comprising: a first rack gear on a first distal side of the first drive rail; and a second rack gear on a second distal side of the first drive rail; a second drive rail slidably mounted in the case, the second drive rail comprising: a third rack gear on a third distal side of the second drive rail, the third rack gear facing the first rack gear; a fourth rack gear on a fourth distal side of the second drive rail, the fourth rack gear facing the second rack gear; and a fifth rack gear on a top portion of the second drive rail; a first pinion gear pivotally mounted to the case, the first pinion gear engaging the first and the third rack gears to translate the first and the second drive rails in opposite directions; a second pinion gear pivotally mounted to the case, the second pinion gear engaging the second and the fourth rack gears to translate the first and the second drive rails in the opposite directions; and a third pinion gear pivotally mounted to the case, the third pinion gear engaging the fifth rack gear to translate the second drive rail in one of two directions, thereby causing the first drive rail to translate in an opposite direction. 2. The lock of claim 1, wherein the first and the third sliding faces are angled and have substantially similar slopes, and the second and the fourth faces are angled and have substantially similar slopes. 3. The lock of claim 1, wherein: the first and the second drive rails further comprise first and second projections, respectively; the first security hook defines a first guide having a first cam surface, the first guide receiving the first projection so that translations of the first drive rail cause the first security hook to extend from and to retract within the case; and the second security hook defines a second guide having a second cam surface, the second guide receiving the second projection so that translations of the second drive rail cause the second security hook to extend from and to retract within the case. 4. The lock of claim 3, wherein the mishandling pin comprises: a central body defining a cavity and a pin inside the cavity, the pin receiving a spring that pushes against the mishandling pin; first and second wings jointed by the central body, the first wing comprising a first distal surface that forms the first sliding face, the second wing comprising a second distal surface that forms the second sliding face, the first and the second wings being separated by a space that accommodates the third pinion gear when the mishandling pin is in the retracted position, the first and the second wings defining slots that receive guides on the case for controlling a movement of the mishandling pin. 5. The lock of claim 3, wherein the mishandling pin comprises: a central body defining a tab that fits into a slot in the case to guide a movement of the mishandling pin; first and second wings jointed by the central body, the first wing comprising a first distal surface that forms the first sliding face, the second wing comprising a second distal surface that forms the second sliding face, the first and the second wings being separated by a space that accommodates the third pinion gear when the mishandling pin is in the retracted position, the first and the second wings defining slots that receive guides on the case for controlling the movement of the mishandling pin, the first and the second wings defining holes that receive respective springs that push against the mishandling pin. 6. The lock of claim 1, wherein: the mishandling pin comprising a bump; and the second drive rails defines a slot for receiving the bump of the mishandling pin, the slot having a surface defining a notch for retaining the bump when the first and the second security hooks are fully extended, the bump and the notch providing positive locking feedback and resistance to movement. 7. The lock of claim 6, wherein at least one of the first and second drive rails comprises at least one bump that slides against a stationary feature to provide positive locking feedback and resistance to movement. 8. The lock of claim 1, wherein at least one of the first and the second drive rails further comprises a stud connected to a sliding rod that drives an additional lock mechanism. 9. The lock of claim 8, wherein the additional lock mechanism comprises a rail connected to the sliding rod and a shot bolt connected to the rail. 10. The lock of claim 8, wherein the additional lock mechanism comprises: a rail connected to the sliding rod, the rail comprising a pin; and a third security hook defining a cam surface for engaging the pin so that translations of the rail cause the security hook to extend from and to retract within a cover. 11. The lock of claim 1, further comprising: a snib handle engaging the third pinion gear; and a door handle secured to the case, the door handle comprising a snib washer that provides a spring force against the snib handle. 12. The lock of claim 3, wherein: the first drive rail and the first security hook comprise matching features that engage each other after the first drive rail is translated to extend the first security hook from the case; and the second drive rail and the second security hook comprise matching features that engage each other after the second drive rail is translated to extend the second security hook from the case. 13. The lock of claim 12, wherein the case comprises guides above the first and the second drive rails to prevent vertical movement of the first and the second drive rails. 14. A lock, comprising: a case; a first drive rail slidably mounted in the case, the first drive rail comprising: a first rack gear on a first distal side of the first drive rail; a second rack gear on a second distal side of the first drive rail; a first projection adjacent to the first distal side; a first notch; a second drive rail slidably mounted in the case opposite the first drive rail, the second drive rail comprising: a third rack gear on a third distal side of the second drive rail, the third rack gear facing the first rack gear; a fourth rack gear on a fourth distal side of the second drive rail, the fourth rack gear facing the second rack gear; a second projection adjacent to the fourth distal side; a fifth rack gear on a top portion of the second drive rail; a second notch; a first pinion gear pivotally mounted to the case along a first direction, the first pinion gear engaging the first and the third rack gears to translate the first and the second drive rails in opposite directions; a second pinion gear pivotally mounted to the case along the first direction, the second pinion gear engaging the second and the fourth rack gears to translate the first and the second drive rails in the opposite directions; a third pinion gear pivotally mounted to the case along a second direction, the third pinion gear engaging the fifth rack gear to translate the second drive rail in one of two directions, thereby causing the first drive rail to translate in an opposite direction; a first security hook pivotally mounted to the case along the second direction, the first security hook defining a first guide with a first cam surface, the first guide receiving the first projection so that translations of the first drive rail cause the first security hook to extend from and to retract within the case, the first security hook comprising a first sliding face, the first security hook comprising a first bump that engages the first notch on the first drive rail when the first security hook is extended from the case; a second security hook pivotally mounted to the case along the second direction, the second security hook defining a second guide with a second cam surface, the second guide receiving the second projection so that translations of the second drive rail cause the second security hook to extend from and to retract within the case, the second security hook comprising a second sliding face, the second security hook comprising a second bump that engages the second notch on the second drive rail when the second security hook is extended from the case; a spring-loaded mishandling pin comprising: a central body; and first and second wings jointed by the central body, the first wing comprising a third sliding face having substantially similar slope as the first sliding face of the first security hook, the second wing comprising a fourth sliding face having substantially similar slope as the second sliding face of the second security hook, the first and the second wings being separated by a space that accommodates the third pinion gear when the mishandling pin is a retracted position, the first and the second wings defining slots that receive guides on the case to control a movement of the mishandling pin; wherein: the third and the fourth sliding faces engage the first and the second sliding faces, respectively, to prevent the first and the second security hooks from extending from the case when the mishandling pin is in an extended position and the first and the second security hooks are retracted; and the third and the fourth sliding faces disengage the first and the second sliding faces to allow the first and the second security hooks to extend from the case when the mishandling pin is in the retracted position. 15. A method for operating a two point lock, comprising: extending a spring-loaded mishandling pin to engage first and second sliding faces of the mishandling pin with respective third and fourth sliding faces of respective first and second security hooks, wherein the mishandling pin prevents the first and the second security hooks from rotating when the mishandling pin is in an extended position and the first and the second security hooks are in retracted positions within a case; retracting the mishandling pin to disengage the first and the second sliding faces from the third and the fourth sliding faces of the first and the second security hooks, wherein the mishandling pin allows the first and the second security hooks to rotate and extend from the case when the mishandling pin is in a retracted position; and after said retracting the mishandling pin, rotating and extending the first and the second security hooks from the case, comprising: rotating an input pinion gear engaged to a rack gear on top of a first drive rail to translate the first drive rail, wherein common pinion gears between rack gears on sides of the first drive rail and a second drive rail translate the first and the second drive rails in opposite directions; engaging a first cam surface on the first security hook with a first projection on the first drive rail to cause a rotation of the first security hook from a translation of the first drive rail; and engaging a second cam surface on the second security hook with a second projection on the second drive rail to cause a rotation of the second security hook from a translation of the second drive rail. 16. The method of claim 15, further comprising: driving an additional lock mechanism by engaging at least one of the first and the second drive rails to a sliding rod. 17. The method of claim 16, wherein the sliding rod translates a rail with a shot bolt. 18. The method of claim 16, wherein the sliding rod rotates a third security hook. 19. The method of claim 15, further comprising providing positive locking feedback and resistance to movement when the security hooks are fully extended, comprising: providing a bump on the mishandling pin that fits into a notch on the first drive rail when the security hooks are fully extended; and providing at least one bump on at least one of the first and the second drive rails, the bump sliding against a stationary feature. 20. The method of claim 15, further comprising: engaging a snib handle with the input pinion gear; and providing a spring force against the snib handle with a snib washer. 21. The method of claim 15, further comprising: engaging matching features on the first drive rail and the first security hook after the first drive rail is translated to extend the first security hook from the case; and engaging matching features on the second drive rail and the second security hook after the second drive rail is translated to extend the second security hook from the case. 22. The method of claim 21, further comprising providing guides above the first and the second drive rails to prevent vertical movement of the first and the second drive rails.
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이 특허에 인용된 특허 (15)
Lin Emily M. Y. (No. 112 ; Sze Chuan Rd. ; Sec. 1 Panchiao City ; Taipei Hsien TWX), Double hook-bolt mortise lock.
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