E - Fixed Constructions – 05 – C
Patent
E - Fixed Constructions
05
C
24/83.3
E05C 19/18 (2006.01) B65D 33/34 (2006.01) G09F 3/14 (2006.01)
Patent
CA 1038602
IMPROVED PLASTIC SEAL Abstract of the Disclosure The specification discloses a seal having a housing, a bore extending into the housing, a locking socket in the bore, a tie member having a free end and an end connected to the housing, and a locking head at the free end of the tie member. The locking head can be inserted into socket through one end of the bore to lock the seal. The socket has an inwardly projecting locking element and the locking head has a head portion with a locking shoulder formed between the head portion and an adjoining section with smaller cross-section. The head portion is dimensioned to elastically deflect the locking element during insertion of the head portion in a locking direction so that the locking shoulder snaps in behind locking surface portions of the locking element when the head portion is inserted into the socket. Weakening means are provided adjacent the extreme free end of the head portion ensuring that the head portion expands transversely to the locking direction in response to force components in a direction opposite the locking direction. This provides a tamper proof seal which can be manufactured by a simple single molding step.
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