Dock-leveler lock

• US 4,825,493 A
• Filed: 08/12/1987
• Issued: 05/02/1989
• Est. Priority Date: 08/12/1987
• Status: Expired due to Fees

• Current Assignee: 3894576 Canada, Ltd.
• Original Assignee: TI Serco Corporation
• Inventors: Nguyen, Hoa
• Primary Examiner(s): Novosad, Stephen J.
• Assistant Examiner(s): Letchford, John F.
• Application Number:
  US07/084,362
• Time in Patent Office: 629 Days
• Field of Search: 14/71.1, 14/71.3, 14/71.5, 14/71.7, 14/69.5, 193/5, 193/38, 193/41, 414/537, 292/216, 292/228, 292/262, 292/272, 292/338, 16/85, 16/291, 16/292, 16/296
• US Class Current: 14/71.3
• CPC Class Codes: B65G 69/2876 Safety or protection means, e.g. skirts

Abstract

A manual lock for a vertically storing lock leveler. The leveler has a locking bar on the side thereof which rides on a cam surface of the lock. The lock has a spring biased latch member with the cam surface and a locking recess. When the leveler is in the vertical stored position, the latch overtravels to have the lockbar engaged in the recess so that positive locking occurs. The lock is released by a manual foot or hand release.

Claims

1. A locking mechanism for a dock leveler comprising:

a dock leveler mounted on a dock surface for hinged movement between an operative position and a stored inoperative position, a locking engagement member protruding outward from one side of said leveler;

a latch member mounted on said dock surface adjacent said leveler, said latch member rotatable and having a surface upon which said locking engagement member contacts as said leveler is moved from an operative to an inoperative position, said latch member further comprising means engaging said locking engagement member when said leveler is in said inoperative position to restrain hinged movement toward said operative position, and

said means engaging said locking engagement member comprises a recess in said surface.

2. The locking mechanism of claim 1, wherein said surface is a cam to rotate said latch member in correspondence with motion of said dock leveler.

3. The locking mechanism of claim 1, wherein said recess is positioned on said surface not in alignment with a line connecting the axes of rotation of said leveler and said latch member.

4. The locking mechanism of claim 1, further comprising means to bias said latch member into contact at said surface with said locking engagement member.

5. The locking mechanism of claim 1, further comprising means to manually move said latch member out of contact with said locking engagement member.

6. The locking member of claim 1, further comprising means to actuate said dock leveler for movement between said operative and said inoperative positions.

7. A dock leveler comprising:

a dock leveler member mounted on a dock surface for rotation between a substantially vertically stored inoperative position and a substantially horizontal operative position, a locking engagement member protruding outward from one side of said dock leveler member;

a latch member mounted to rotate about an axis horizontally and vertically offset from said docking engagement member and in correspondence with said dock leveler and comprising a surface having a recess in contact with said locking engagement member when said leveler is in said substantially vertical inoperative position to restrain movement of said dock leveler into said operative position.

9. The locking mechanism of claim 7, wherein said recess is positioned on said surface not in alignment with a line connecting the axes of rotation of said leveler and said latch member.

10. The locking mechanism of claim 7, further comprising means to bias said latch member into contact at said surface with said locking engagement member.

11. The locking mechanism of claim 7, further comprising means to manually move said latch member out of contact with said locking engagement member.

12. The locking member of claim 7, further comprising means to actuate said dock leveler for movement between said operative and said inoperative positions.

8. The locking mechanism of claim 8, wherein said surface is a cam to rotate said latch member in correspondence with motion of said dock leveler.