A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
An access hatch mountable in an aperture in a wall or ceiling having a frame, a door panel having an aperture in which is a locking mechanism 10. The locking mechanism has a rotating locking member 14 and a main body 12 comprising a front surface 16 mounted through the door panel aperture and a recess 18 defining a keyway comprising a user-actuatable surface 20a that sits flush with the front surface when at rest and is selectively retractable into the keyway. Preferably the front surface sits flush with the door panel surface and the main body has a shoulder or step formation between its upper surface 22 and the front surface 16. The upper surface sits behind the door panel and the front surface extends through the aperture. The actuatable cover member 20 is preferably biased into the protective flush position by a spring 24 which engages with a mount 26 and the back surface 32 of the actuatable member 20. The door panel may have a U bend around its edge into which the lock in located with the locking member extending beyond the edge in the locked position. The stand alone lock assembly and the door panel with U bend are both defined.
An access hatch mountable in an aperture in a wall or ceiling having a frame, a door panel having an aperture in which is a locking mechanism 10. The locking mechanism has a rotating locking member 14 and a main body 12 comprising a front surface 16 mounted through the door panel aperture and a recess 18 defining a keyway comprising a user-actuatable surface 20a that sits flush with the front surface when at rest and is selectively retractable into the keyway. Preferably the front surface sits flush with the door panel surface and the main body has a shoulder or step formation between its upper surface 22 and the front surface 16. The upper surface sits behind the door panel and the front surface extends through the aperture. The actuatable cover member 20 is preferably biased into the protective flush position by a spring 24 which engages with a mount 26 and the back surface 32 of the actuatable member 20. The door panel may have a U bend around its edge into which the lock in located with the locking member extending beyond the edge in the locked position. The stand alone lock assembly and the door panel with U bend are both defined.
Access hatch
CHRISTOPHER DALLAS MARVIN (author)
2020-06-17
Patent
Electronic Resource
English
IPC:
E05B
LOCKS
,
Schlösser