초록 ▼

A manually operated manhole cover lifter comprising two substantially linear members connected by a pivot in the form of scissors or tongs. The lower end of each member has a hook adapted for engaging a cover recess and the upper end has a handle for manual engagement. The hook angles are selected t

A manually operated manhole cover lifter comprising two substantially linear members connected by a pivot in the form of scissors or tongs. The lower end of each member has a hook adapted for engaging a cover recess and the upper end has a handle for manual engagement. The hook angles are selected together with the pivot to hook distance to provide secure engagement of the cover when the hooks are inserted into cover apertures. The tool may be used by one or two people standing in an upright position to lift and move a cover from, or place a cover on, a manhole.

대표청구항 ▼

1. Apparatus for lifting a manhole cover having two lifting apertures comprising: a pair of substantially linear members each having a handle for manual engagement on one end and a hook on the opposite end adapted for engaging manhole cover lifting apertures, and a pivot coupling said linear memb

1. Apparatus for lifting a manhole cover having two lifting apertures comprising: a pair of substantially linear members each having a handle for manual engagement on one end and a hook on the opposite end adapted for engaging manhole cover lifting apertures, and a pivot coupling said linear members at a point intermediate said handle ends and said hook ends, said linear members crossing each other at said pivot; and wherein said pivot comprises two pieces of flat steel bar stock and a bolt, one of said bar stock pieces welded to a first of said linear members and having a hole for receiving said bolt and the other of said bar stock pieces welded to a second of said linear members and having hole for receiving said bolt. 2. Apparatus for lifting a manhole cover having two lifting apertures comprising: a pair of substantially linear members each having a handle for manual engagement on one end and a hook on the opposite end adapted for engaging manhole cover lifting apertures, and a pivot coupling said linear members at a point intermediate said handle ends and said hook ends, said linear members crossing each other at said pivot; and wherein said pivot comprises two pieces of flat steel bar stock and a shoulder bolt, one of said bar stock pieces welded to a first of said linear members and having a threaded hole for receiving a threaded section of said shoulder bolt and the other of said bar stock pieces welded to a second of said linear members and having a smooth hole for receiving a smooth shoulder portion of said shoulder bolt to form a bearing. 3. A manhole cover lifter for lifting manhole covers having two lifting apertures comprising: first and second substantially rigid members coupled by a pivot in the form of scissors, each member having an upper end and a lower end, where at least one the members has a handle on its upper end for manual grasping, each of the members has a hook on its lower end adapted to engage said lifting apertures, and the lengths of said members between said pivot and the lower ends of said members are substantially the same; and wherein said pivot comprises two pieces of flat steel stock and a shoulder bolt, one of said flat stock pieces welded to a first of said members and having a threaded hole for receiving a threaded section of said shoulder bolt and the other of said flat stock pieces welded to a second of said members and having a smooth hole for receiving a smooth shoulder portion of said shoulder bolt to form a bearing.