IP Library Granted Patent US 7,544,035
Granted Patent B1
US 7,544,035 · App. 11/199,940 · Granted Jun 9, 2009

Manhole cover lift

Assignee: Industrial Magnetics, Inc.
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Quick Facts
Patent No.
US 7,544,035
App. No.
11/199,940
Granted
Jun 9, 2009
Kind
B1
Abstract

The disclosure includes an apparatus for moving a manhole cover comprising a lever having an engaging end, a linkage connected to the engaging end of the lever, and at least one magnet connected to the linkage and engageable with the manhole cover, wherein the lever provides leverage for moving the manhole cover. The at least one magnet may be selectively engageable with the manhole cover and may further have an interface surface. The at least one magnet may have a handle moveable between an engaged position, wherein a magnetic flux is emitted through the interface surface of the at least one magnet, and a disengaged position, wherein substantially no magnetic flux is emitted through the interface surface of the at least one magnet.

Claims (23)

1. An apparatus for moving a manhole cover, comprising:

a lever having a first lever arm having a fulcrum end and a handle end, a second lever arm having a fulcrum end and an engaging end, and a hinged joint, wherein the first lever arm is connected to the second lever arm by the hinged joint to allow the lever to be collapsed;

a linkage connected to the engaging end of the lever;

at least one magnet connected to the linkage and engageable with the manhole cover, wherein the lever provides leverage for moving the manhole cover;

the linkage being a hook; and

a plurality of holes provided on the hook wherein each hole is engageable with the engaging end of the second lever arm of the lever.

2. An apparatus for moving a manhole cover, comprising:

a lever having a first lever arm having a fulcrum end and a handle end, a second lever arm having a fulcrum end and an engaging end, and a hinged joint, wherein the first lever arm is connected to the second lever arm by the hinged joint to allow the lever to be collapsed;

a hook connected to the engaging end of the second lever arm of the lever;

a spreader bar engageable with the hook;

at least two magnets connected to the spreader bar and selectively engageable with the manhole cover; and

a plurality of holes provided on the hook wherein each hole is engageable with the engaging end of the second lever arm of the lever.

3. An apparatus for moving a manhole cover, comprising:

a lever having a first lever arm having a fulcrum end and a handle end, a second lever arm having a fulcrum end and an engaging end, and a hinged joint, wherein the first lever arm is connected to the second lever arm by the hinged joint to allow the lever to be collapsed;

a slot provided in the engaging end of the lever;

a hook disposed within the slot and connected to the engaging end of the second lever arm of the lever;

a spreader bar engageable with the hook;

a plurality of holes provided on the hook wherein each hole is engageable with the engaging end of the second lever arm of the lever;

two magnets connected to the spreader bar and selectively engageable with the manhole cover;

a housing enclosing each of the two magnets;

each housing of the two magnets each having an interface surface; and

the two magnets each having a handle movable between an engaged position, wherein a magnetic flux is emitted through the interface surface of the housing of the magnet, and a disengaged position, wherein substantially no magnetic flux is emitted through the interface surface of the housing of the magnet.

4. The apparatus for moving a manhole cover of claim 3 , said first lever arm further comprising a tubular member and an insert member slidably engageable with said tubular member, whereby the length of said first lever arm may be varied.

Assignments (5)
RELEASE OF SECURITY INTEREST Recorded Nov 23, 2021
From: ANTARES CAPITAL LP, AS ADMINISTRATIVE AGENT
To: INDUSTRIAL MAGNETICS, INC.; STERLING CONTROLS, INC.
Reel/Frame 058196/0118 →
RELEASE OF SECURITY INTEREST Recorded Feb 12, 2016
From: ABACUS FINANCE GROUP, LLC
To: INDUSTRIAL MAGNETICS, INC.
Reel/Frame 037726/0513 →
SECURITY INTEREST Recorded Feb 12, 2016
From: INDUSTRIAL MAGNETICS, INC.; PRATER INDUSTRIES, INC.; STERLING CONTROLS, INC.
To: ANTARES CAPITAL LP, AS ADMINISTRATIVE AGENT
Reel/Frame 037728/0536 →
SECURITY AGREEMENT Recorded Feb 24, 2012
From: INDUSTRIAL MAGNETICS, INC.
To: ABACUS FINANCE GROUP, LLC
Reel/Frame 027756/0846 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Aug 9, 2005
From: FRIEDRICH, PETER
To: INDUSTRIAL MAGNETICS, INC.
Reel/Frame 016868/0001 →
Continuity (1)
Provisional Application 6064881200 · Feb 1, 2005