US4991893A — Manhole cover lifting device

Claim 1

Independent Claim 118 words

A manhole cover lifting device for lifting a manhole cover having at least two lifting holes or slots therein comprising an elongated lever provided at one end with a first manhole cover lifting means fixed to the lever for engagement with a first of said slots or holes, and at the other end with a manually engageable handle; a sleeve freely slidably mounted on the elongated lever between said ends, and a second manhole cover lifting means for engagement with a second of said slots or holes operatively connected to said sleeve by a flexible member, wherein said sleeve is freely slidable along said elongated lever to accommodate manhole covers of various diameters and to maximize available leverage.

Claim 2

Dependent Claim 118 words

A manhole cover lifting device for lifting a manhole cover having at least two lifting holes or slots therein comprising an elongated lever provided at one end with a first manhole cover lifting means fixed to the lever for engagement with a first of said slots or holes, and at the other end with a manually engageable handle; a sleeve freely slidably mounted on the elongated lever between said ends, and a second manhole cover lifting means for engagement with a second of said slots or holes operatively connected to said sleeve by a flexible member, wherein said sleeve is freely slidable along said elongated lever to accommodate manhole covers of various diameters and to maximize available leverage.

Claim 3

Dependent Claim 17 words

A manhole cover lifting device as defined in claim 1 wherein said flexible member comprises a chain.

Claim 4

Dependent Claim 31 words

A manhole cover lifting device as defined in claim 1 wherein said first manhole cover lifting means comprises a first tool head including a first pair of alternatively useable hook elements.

Claim 5

Dependent Claim 31 words

A manhole cover lifting device as defined in claim 3 wherein said second manhole cover lifting means comprises a second tool head including a second pair of alternatively useable hook elements.

Claim 6

Dependent Claim 35 words

A manhole cover lifting device as defined in claim 4 wherein said hook elements in each of said first and second pair of alternatively useable hook elements are in back-to-back relationship, facing in opposite directions.

Claim 7

Dependent Claim 37 words

A manhole cover lifting device as defined in claim 3 wherein the hook element of the first pair of alternatively useable hook elements not in use in a lifting operation comprises a fulcrum for the lifting device.

Claim 8

Dependent Claim 23 words

A manhole cover lifting device as defined in claim 1 wherein said sleeve includes means for connecting said sleeve to said flexible member.

Claim 9

Dependent Claim 155 words

A manhole cover lifting device comprising an elongated lever provided at one end with a first manhole cover lifting tool, and at the other end with a manually engageable handle; a sleeve freely slidably mounted on the elongated lever between said ends, and a second manhole cover lifting tool operatively connected to said sleeve; wherein said sleeve is freely adjustable along said elongated lever to accommodate manhole covers of various diameters and to maximize available leverage; wherein said first manhole cover lifting tool comprises a first tool head including a first pair of alternatively useable hook elements; and further wherein said first pair of alternatively useable hook elements includes a first relatively flat strip, formed with a hook at one end, and fastened to the elongated lever at the other end, and a first substantially round rod formed with a hook at one end fastened to the first relatively flat strip at the other end.

Claim 10

Dependent Claim 155 words

A manhole cover lifting device comprising an elongated lever provided at one end with a first manhole cover lifting tool, and at the other end with a manually engageable handle; a sleeve freely slidably mounted on the elongated lever between said ends, and a second manhole cover lifting tool operatively connected to said sleeve; wherein said sleeve is freely adjustable along said elongated lever to accommodate manhole covers of various diameters and to maximize available leverage; wherein said first manhole cover lifting tool comprises a first tool head including a first pair of alternatively useable hook elements; and further wherein said first pair of alternatively useable hook elements includes a first relatively flat strip, formed with a hook at one end, and fastened to the elongated lever at the other end, and a first substantially round rod formed with a hook at one end fastened to the first relatively flat strip at the other end.

Claim 11

Dependent Claim 87 words

A manhole cover lifting device as defined in claim 8 wherein said second manhole cover lifting tool comprises a second tool head including a second pair of alternatively useable hook elements, said second pair of alternatively useable hook elements includes a second relatively flat strip, formed with a hook at one end and operatively fastened to said sleeve at the other end, and a second substantially round rod formed with a hook at one end and fastened to the second relatively flat strip at the other end.

Claim 12

Dependent Claim 134 words

A manhole cover lifting device for lifting a manhole cover having at least two lifting holes or slots therein comprising an elongated lever and a pair of manhole cover lifting means for engaging said at least two holes or slots, one of said lifting means fixed to one end of the lever and the other of said lifting means fixed to a flexible member extending between the other of said lifting means and a sleeve mounted on said elongated lever, wherein said one of said lifting means includes fulcrum means for facilitating lifting of the manhole cover, and wherein said device is adapted to lift covers of various diameters but wherein, for any of said covers of various diameters, the distance between the other of said lifting means and the sleeve remains substantially constant.

Claim 13

Dependent Claim 134 words

A manhole cover lifting device for lifting a manhole cover having at least two lifting holes or slots therein comprising an elongated lever and a pair of manhole cover lifting means for engaging said at least two holes or slots, one of said lifting means fixed to one end of the lever and the other of said lifting means fixed to a flexible member extending between the other of said lifting means and a sleeve mounted on said elongated lever, wherein said one of said lifting means includes fulcrum means for facilitating lifting of the manhole cover, and wherein said device is adapted to lift covers of various diameters but wherein, for any of said covers of various diameters, the distance between the other of said lifting means and the sleeve remains substantially constant.

Claim 14

Dependent Claim 67 words

A manhole cover lifting device as defined in claim 10 wherein said one of the lifting means includes a first hook for engaging a first of said at least two slots or holes provided in the manhole cover, and wherein said other of the lifting means includes a second hook for engaging a second of said at least two slots or holes provided in the manhole cover.

Claim 15

Dependent Claim 19 words

A manhole cover lifting device as defined in claim 10 wherein said sleeve is freely movable along the lever.

Claim 16

Dependent Claim 20 words

A manhole cover lifting device as defined in claim 12 wherein said flexible member comprises a chain of fixed length.

Claim 17

Dependent Claim 67 words

A manhole cover lifting device as defined in claim 13 wherein said one of the lifting means includes a first hook for engaging a first of said at least two slots or holes provided in the manhole cover and wherein said other of the lifting means includes a second hook for engaging a second of said at least two slots or holes provided in the manhole cover.

Claim 18

Dependent Claim 30 words

A manhole cover lifting device as defined in claim 10 wherein each of said pair of manhole cover lifting means comprises a pair of alternatively usable manhole cover lifting tools.

Claim 19

Dependent Claim 24 words

A manhole cover lifting device as defined in claim 15 wherein one of said alternatively usable manhole cover lifting tools comprises said fulcrum means.

Claim 20

Dependent Claim 169 words

A manhole cover lifting device for lifting a manhole cover provided with a pair of diametrically opposed holes or slots comprising an elongated lever having a handle end and a working end, a first tool head mounted on said working end and including a first pair of alternatively useable manhole cover lifting tools for engaging one of said pair of holes or slots; a second tool head including a second pair of alternatively usable manhole cover lifting tools for engaging the other of said pair of holes or slots, such that, in use, the lifting tool of said first pair of lifting tools not engaged in one of said pair of holes or slots comprises a fulcrum for facilitating lifting of the manhole cover; a sleeve freely slidably mounted on said lever intermediate the handle and working ends; and a fixed length flexible chain extending between said second tool head and said sleeve, whereby said device may be used to lift manhole covers of various diameters with maximum leverage.

Claim 21

Dependent Claim 169 words

A manhole cover lifting device for lifting a manhole cover provided with a pair of diametrically opposed holes or slots comprising an elongated lever having a handle end and a working end, a first tool head mounted on said working end and including a first pair of alternatively useable manhole cover lifting tools for engaging one of said pair of holes or slots; a second tool head including a second pair of alternatively usable manhole cover lifting tools for engaging the other of said pair of holes or slots, such that, in use, the lifting tool of said first pair of lifting tools not engaged in one of said pair of holes or slots comprises a fulcrum for facilitating lifting of the manhole cover; a sleeve freely slidably mounted on said lever intermediate the handle and working ends; and a fixed length flexible chain extending between said second tool head and said sleeve, whereby said device may be used to lift manhole covers of various diameters with maximum leverage.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1994-02-11	1994-08-13	1995-02-12	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1998-02-11	1998-08-13	1999-02-12	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2002-02-11	2002-08-13	2003-02-12	$7700.00	Window Closed / Lapsed

Manhole cover lifting device

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