The invention discloses several types of fastener, fastening systems, fastener assemblies and related areas.

In particular, the invention relates to a releasable fastening system (50) which has a pin (152) with a locking cavity (163). The pin is intended for insertion in an aperture (154). A locking means (158, 160) engages the locking cavity (163) of the pin (152) when the pin (152) is received in the aperture (154). The system (150) also includes unlocking means (162) which includes material adapted to contract when activated. When a material contracts, engagement means (158) included in the locking means (158, 160), disengage the locking cavity (154).

A vehicle safety release system effecting an automated release and having, inter alia, a seatbelt, an integrated circuit (control unit), a power source, a transmitter, and a collision detection sensor, is contemplated. The safety release system also contemplates a manual release built to work in tandem with the system's automated release. The safety release system may be operated by both a manual input and the input from one or more collision detection sensors. When a push button is depressed a signal is sent to the control unit to release the seatbelt. Aspects of embodiments of the invention also contemplate access to the seatbelt's base latch to enable removal, if needed.

A vehicle safety release system effecting an automated release and having, inter alia, a seatbelt, an integrated circuit (control unit), a power source, a transmitter, and a collision detection sensor, is contemplated. The safety release system also contemplates a manual release built to work in tandem with the system's automated release. The safety release system may be operated by both a manual input and the input from one or more collision detection sensors. When a push button is depressed a signal is sent to the control unit to release the seatbelt. Aspects of embodiments of the invention also contemplate access to the seatbelt's base latch to enable removal, if needed.

A seat belt buckle for engaging a latch inserted into buckle and retained in a latched mode until released by depressing a press release button. In a locked mode, with the vehicle ignition switch ON and the latch inserted into buckle, a complementary lock is activated preventing press the release button from effecting release of latch from buckle.