Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
168 words
In a multisection telescopic boom: a hollow base section; a hollow intermediate section telescopable within said base section; a hollow fly section telescopable within said intermediate section; a first elongated rotatable screw located within said boom and having its base end rotatably mounted on and connected to the base end of said base section; a first nut means rigidly mounted on the base end of said intermediate section and engaged by said first screw; a second elongated rotatable screw located within said boom and having its base end rotatably mounted on and connected to the base end of said intermediate section; a second nut means rigidly mounted on the base end of said fly section; and screw drive means operable to rotate both screws simultaneously to effect simultaneous axial telescopic movement of the axially movable boom sections, said screw drive means comprising at least one motor connected to effect rotation of said first screw, and means connected to said second screw to effect rotation of said second screw.
Claim 2
Dependent Claim
168 words
In a multisection telescopic boom: a hollow base section; a hollow intermediate section telescopable within said base section; a hollow fly section telescopable within said intermediate section; a first elongated rotatable screw located within said boom and having its base end rotatably mounted on and connected to the base end of said base section; a first nut means rigidly mounted on the base end of said intermediate section and engaged by said first screw; a second elongated rotatable screw located within said boom and having its base end rotatably mounted on and connected to the base end of said intermediate section; a second nut means rigidly mounted on the base end of said fly section; and screw drive means operable to rotate both screws simultaneously to effect simultaneous axial telescopic movement of the axially movable boom sections, said screw drive means comprising at least one motor connected to effect rotation of said first screw, and means connected to said second screw to effect rotation of said second screw.
Claim 3
Dependent Claim
20 words
A boom according to claim 1 wherein said means to effect rotation of said second screw is a second motor.
Claim 4
Dependent Claim
39 words
A boom according to claim 1 wherein said means to effect rotation of said second screw comprises rotation transmission means connected between said first screw and said second screw whereby rotation of the former effects rotation of the latter.
Claim 5
Dependent Claim
46 words
A boom according to claim 3 wherein said rotation transmission means includes a first coupling member rotatably driven by said first screw, a second coupling member for rotatably driving said second screw, and means to enable said first coupling member to drive said second coupling member.
Claim 6
Dependent Claim
17 words
A boom according to claim 4 wherein said last recited means comprises an endless flexible drive chain.
Claim 7
Dependent Claim
20 words
A boom according to claim 3 wherein said rotation transmission means includes interengageable means on said first and second screws.
Claim 8
Dependent Claim
44 words
A boom according to claim 6 wherein said second screw is hollow and said first screw extends thereinto, and wherein said interengageable means includes a projection on said first screw engageable with an axially extending groove on the hollow interior of said second screw.
Claim 9
Dependent Claim
25 words
A boom according to claims 1 or 2 or 3 further including support means connected to said screws to support said screws on said boom.
Claim 10
Dependent Claim
22 words
A boom according to claim 8 wherein said support means is axially movable relative to at least some of said boom sections.