Error-proofing combination padlock
First Claim
1. An error-proofing combination padlock comprising:
- a casing assembly having a top casing half;
a bottom casing half mounted on the top casing half;
a top;
a bottom;
a front;
a back;
two sides;
an inner chamber;
an inner surface;
multiple transverse slots defined respectively through the top and bottom casing halves and arranged longitudinally at intervals;
a through hole defined through the back of the casing assembly and near one of the sides of the casing assembly;
a locking socket defined in the back of the casing assembly and near the other side of the casing assembly, to be opposite the through hole;
a cavity defined in the bottom casing half;
a notch defined in the bottom casing half;
multiple transverse inner flanges formed on the inner surface and arranged longitudinally at intervals;
multiple transverse circular recesses defined in the inner surface and arranged longitudinally at intervals, wherein adjacent transverse circular recesses are separated by the transverse inner flange; and
a mounting recess defined in the bottom casing;
multiple dials rotatably and respectively mounted in the transverse circular recesses and extending respectively through the transverse slots and each having an inner surface;
an outer surface;
multiple inner keys formed on the inner surface of each dial and arranged at intervals;
multiple keyways defined respectively between adjacent inner keys; and
multiple numerals formed on the outer surface of each dial and corresponding to the keyways;
multiple sleeves correspond to the dials, mounted rotatably and respectively inside the dials and arranged longitudinally adjacent to each other and each having a front end;
aback end;
an outer surface;
an inner surface;
multiple outer keys formed on the outer surface of each sleeve, and corresponding to the keyways of the dial; and
an inner flange formed on the inner surface of the sleeve and having a front, a back and a gap defined on the inner flange;
a shackle mounted retractably and pivotally on the casing and having a circular cross-section;
a longitudinal shaft section mounted slidably and rotatably through the sleeves, extending through the through hole in the casing assembly, corresponding to the gaps respectively of the inner flanges and having a front end and back end;
a hook section formed on the back end of the longitudinal shaft section and having a locking end corresponding to the locking socket;
multiple transverse sockets defined on the longitudinal shaft section and corresponding to the inner flanges respectively of the sleeves;
a push block formed on the longitudinal shaft section and close to the back end of the longitudinal shaft section; and
a shackle-retaining block formed on the longitudinal shaft section close to the front end and aligned with the push block;
a locking bolt mounted slidably through the sleeves inside the casing assembly and having an inner curved surface;
an outer curved surface;
a front end;
a back end;
a longitudinal protrusion formed on the back end of the locking bolt;
a transverse protrusion formed on the outer curved surface close to the back end of the locking bolt and abutting against a surface of the inner flange of the sleeve closest to the back of the casing assembly;
a front board formed on the front end of the locking bolt and having a front surface and a back surface abutting against the front end of the sleeve closest to the front of the casing assembly;
a through hole defined through the front board and near the inner curved surface and corresponding to the longitudinal shaft section of the shackle; and
a notch defined through the front board and under the through hole, communicated with the front hole and corresponding to the shackle-retaining block; and
a spring mounted against the surface of the front board inside the mounting recess in the bottom casing half.
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Accused Products
Abstract
An error-proofing combination padlock has a casing assembly, multiple dials, multiple sleeves, a shackle, a locking bolt and a spring. The dials are mounted rotatably inside the casing assembly. The sleeves are mounted rotatably and respectively inside the dials. The shackle is mounted retractably and pivotally on the casing assembly. A locking bolt is mounted slidably through the sleeves. The error-proofing combination padlock prevents dials from rotating except when the shackle is located in the locking (first) position or the combination-resetting (third) position and avoids a new and unintended unlocking combination arising during a resetting operation of the combination.
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Citations
4 Claims
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1. An error-proofing combination padlock comprising:
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a casing assembly having a top casing half;
a bottom casing half mounted on the top casing half;
a top;
a bottom;
a front;
a back;
two sides;
an inner chamber;
an inner surface;
multiple transverse slots defined respectively through the top and bottom casing halves and arranged longitudinally at intervals;
a through hole defined through the back of the casing assembly and near one of the sides of the casing assembly;
a locking socket defined in the back of the casing assembly and near the other side of the casing assembly, to be opposite the through hole;
a cavity defined in the bottom casing half;
a notch defined in the bottom casing half;
multiple transverse inner flanges formed on the inner surface and arranged longitudinally at intervals;
multiple transverse circular recesses defined in the inner surface and arranged longitudinally at intervals, wherein adjacent transverse circular recesses are separated by the transverse inner flange; and
a mounting recess defined in the bottom casing;
multiple dials rotatably and respectively mounted in the transverse circular recesses and extending respectively through the transverse slots and each having an inner surface;
an outer surface;
multiple inner keys formed on the inner surface of each dial and arranged at intervals;
multiple keyways defined respectively between adjacent inner keys; and
multiple numerals formed on the outer surface of each dial and corresponding to the keyways;
multiple sleeves correspond to the dials, mounted rotatably and respectively inside the dials and arranged longitudinally adjacent to each other and each having a front end;
aback end;
an outer surface;
an inner surface;
multiple outer keys formed on the outer surface of each sleeve, and corresponding to the keyways of the dial; and
an inner flange formed on the inner surface of the sleeve and having a front, a back and a gap defined on the inner flange;
a shackle mounted retractably and pivotally on the casing and having a circular cross-section;
a longitudinal shaft section mounted slidably and rotatably through the sleeves, extending through the through hole in the casing assembly, corresponding to the gaps respectively of the inner flanges and having a front end and back end;
a hook section formed on the back end of the longitudinal shaft section and having a locking end corresponding to the locking socket;
multiple transverse sockets defined on the longitudinal shaft section and corresponding to the inner flanges respectively of the sleeves;
a push block formed on the longitudinal shaft section and close to the back end of the longitudinal shaft section; and
a shackle-retaining block formed on the longitudinal shaft section close to the front end and aligned with the push block;
a locking bolt mounted slidably through the sleeves inside the casing assembly and having an inner curved surface;
an outer curved surface;
a front end;
a back end;
a longitudinal protrusion formed on the back end of the locking bolt;
a transverse protrusion formed on the outer curved surface close to the back end of the locking bolt and abutting against a surface of the inner flange of the sleeve closest to the back of the casing assembly;
a front board formed on the front end of the locking bolt and having a front surface and a back surface abutting against the front end of the sleeve closest to the front of the casing assembly;
a through hole defined through the front board and near the inner curved surface and corresponding to the longitudinal shaft section of the shackle; and
a notch defined through the front board and under the through hole, communicated with the front hole and corresponding to the shackle-retaining block; and
a spring mounted against the surface of the front board inside the mounting recess in the bottom casing half. - View Dependent Claims (2, 3, 4)
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Specification