Locking device
AssigneeFrorest PTY Limited
InventorsIrwin C. Thorncraft, Owen B. Holmes, Harry Wolters
Life of this patent
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Abstract
A locking device comprising: a bolt (1) provided with a handle mounting block (6) and a handle (15) for movement of said bolt (1); and, a lever (2), adapted to selectively engage said handle mounting block (6) upon activation of an activation means (4, 14); wherein, in a neutral mode (FIG. 3), said lever (2) allows free movement of said bolt (1), in a locking mode (FIG. 5) and upon movement of said handle (15), said handle mounting block (6) may be engaged by said lever (2), and, in locked mode (FIG. 1), said handle mounting block (6) engaged by said lever (2) substantially prevents any movement of said bolt (1).
Claims9
A locking device comprising:
- a bolt provided with a handle mounting block and a handle for movement of said bolt;
- and
- a lever, adapted to selectively engage said handle mounting block upon activation of an activation means;
- wherein, in a neutral mode said lever allows free movement of said bolt and prevents said bolt from assuming a locking position, in a locking mode and upon movement of said handle, said handle mounting block may be engaged by said lever, and, in a locked mode said handle mounting block engaged by said lever substantially prevents any movement of said bolt.
A locking device, comprising:
- a bolt movable along the longitudinal axis thereof between locked and unlocked positions, said bolt being supported by a pair of supports at substantially the ends thereof, and having a handle mounting block provided in substantially the centre thereof, said bolt having a pair of springs therearound, each spring located between one side of said handle mounting block and a respective one of said supports, such that said pair of springs normally bias said bolt into an unlocked position;
- a first lever, a first end thereof being provided with a cutout adapted to engage said handle mounting block, and a second end thereof being provided with a protrusion, said first lever being pivotally biased about a first pivot point;
- a second lever, a first end thereof being provided with first and second retention means adapted to engage with said protrusion, said second lever adapted to be moved by at least one activation means about a second pivot point;
- said first end of said second lever being biased towards said second end of said first lever;
- and
- said activation means being provided to cause said second lever to rotate about said second pivot point against the bias thereof;
- said locking device operating between three cyclic modes, wherein:
- in a neutral mode, said first retention means of said second lever retains a said protrusion of said first lever to prevent said first lever from contacting said handle mounting block, consequently allowing unrestricted movement of said bolt;
- in a locking mode, said first lever is unretained by said second lever such that upon movement of said handle, said handle mounting block contacts an edge of a cutout and moves said first lever such that said protrusion engages and is retained by said second retention means, and simultaneously, said handle mounting block becomes engaged and retained by said first cutout of said first lever;
- in a locked mode, said protrusion of said first lever is retained by said second retention means of said second lever, and movement of said handle mounting block is restricted by said cutout, firmly maintaining said bolt in said locked position;
- wherein, said locking device is transferred from said neutral mode to said locking mode and from said locked mode to said neutral mode by activation of said activation means.
Dependencies are inferred from the claim text.