Antitheft well cover lock

Antitheft well cover lock

The invention discloses an antitheft well cover lock. The antitheft well cover lock comprises a special T-shaped inner triangular key, a lock body, a locking disc and plastic steel lock tongues. The lock is fixed in the center of the lower surface of a well cover; the special inner triangular key is...

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1. Verfasser: TANG QUANYONG
Format: Patent
Sprache:chi ; eng
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ACCESSORIES THEREFOR
BOLTS OR FASTENING DEVICES FOR WINGS, SPECIALLY FOR DOORS ORWINDOWS
FIXED CONSTRUCTIONS
HANDCUFFS
KEYS
LOCKS
SAFES
WINDOW OR DOOR FITTINGS
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creator TANG QUANYONG
description The invention discloses an antitheft well cover lock. The antitheft well cover lock comprises a special T-shaped inner triangular key, a lock body, a locking disc and plastic steel lock tongues. The lock is fixed in the center of the lower surface of a well cover; the special inner triangular key is inserted in a triangular cylinder of the locking disc by penetrating through the center of the well cover, and is downwards vertically forced to open a locking mechanism; meanwhile, the key is clockwise turned in place; a linkage mechanism controlled by the key drives four plastic steel lock tongues to synchronously retract in four directions below the well edge in a cross coordinate manner; and the well cover is opened. Conversely, the special inner triangular key is still inserted in a locking hole of a lock core mechanism by penetrating through the center of the well cover, and is downwards vertically forced to open the locking mechanism; meanwhile, the key is anticlockwise turned in place; the linkage mechanis
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subjects ACCESSORIES THEREFOR
BOLTS OR FASTENING DEVICES FOR WINGS, SPECIALLY FOR DOORS ORWINDOWS
FIXED CONSTRUCTIONS
HANDCUFFS
KEYS
LOCKS
SAFES
WINDOW OR DOOR FITTINGS
title Antitheft well cover lock
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