Patent US1287860A successfully refreshed from Google Patents.
Patent US2107424A successfully refreshed from Google Patents.
US3844618A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mining machine having rotary motor extended cutter head
Assignee: Lee Norse Co
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Filing: 1973-10-09
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Granted: 1974-10-29
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Expires: 1993-10-09
Abstract
Abstract A continuous mining machine particularly adapted for low overhead coal seams having a relatively small diameter cutterhead of the non-oscillating or fixed head type driven by chains that also cut coal and convey it rearwardly to a gathering head mounted on the front of the machine. The cutter head is extendible by low pressure rotary fluid motors acting through screw-and-nut arrangements, the component screw and nut of each such arrangement each being movable for proper alignment with the other. The gathering head carries a pair of counter-rotating discs having vanes cooperating with conveyor fences for sweeping and discharging coal to a conventional conveyor mounted on the machine chassis.
Inventors
- 👤 Gatti F Delli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:28
CPC Classifications
E; E21; E21D; E21D9/00; E21D9/12; E21D9/126; E21D9/128; B; B65; B65G; B65G65/00; B65G2814/00; B65G2814/03; B65G2814/0301; B65G2814/0326; B65G2814/0328; B65G2814/0331; B65G2814/0334
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
145 words
A mining machine including: a mobile chassis carrying a movable boom extending forwardly therefrom; a cutter head rotatably mounted on said boom; said cutter head including a drum portion and an end portion movably mounted in said drum portion for telescoping travel inwardly and outwardly relative to said drum portion; and power means for moving said end portion inwardly and outwardly including a fluid driven rotary motor mounted in said drum portion and driving thread means interconnected between said end portion and said drum portion; said thread means including a nut driven by said motor and a screw connected to said end portion; and at least one of the connections between said motor and nut, and screw and end portion, including a universal joint allowing the thread means to move slightly relative to said cutter head in seeking proper alignment between the nut and screw.
Claim 2
Dependent Claim
145 words
A mining machine including: a mobile chassis carrying a movable boom extending forwardly therefrom; a cutter head rotatably mounted on said boom; said cutter head including a drum portion and an end portion movably mounted in said drum portion for telescoping travel inwardly and outwardly relative to said drum portion; and power means for moving said end portion inwardly and outwardly including a fluid driven rotary motor mounted in said drum portion and driving thread means interconnected between said end portion and said drum portion; said thread means including a nut driven by said motor and a screw connected to said end portion; and at least one of the connections between said motor and nut, and screw and end portion, including a universal joint allowing the thread means to move slightly relative to said cutter head in seeking proper alignment between the nut and screw.
Claim 3
Dependent Claim
25 words
The mining machine of claim 1 wherein: said thread means is self-locking so that it cannot be moved by force applied to said end portion.
Claim 4
Dependent Claim
150 words
A mining machine comprising supporting means, rotary cutter head means carried by said supporting means and including at least one extendible end portion, means drivingly connected to said cutter head meaNs for rotatably driving said cutter head means, and moving means for moving said extendible end portion of said cutter head means, said moving means including rotary motor means and thread means drivingly connecting said motor means with said end portion, said thread means comprising a nut connected to one of said motor means and end portion and a screw connected to the other thereof, and at least one of the connections between said nut and its connected said one of said motor means and end portion, and said screw and its connected other thereof, including a universal joint allowing said thread means to move relative to said cutter head means for proper alignment between said nut and said screw.
Claim 5
Dependent Claim
150 words
A mining machine comprising supporting means, rotary cutter head means carried by said supporting means and including at least one extendible end portion, means drivingly connected to said cutter head meaNs for rotatably driving said cutter head means, and moving means for moving said extendible end portion of said cutter head means, said moving means including rotary motor means and thread means drivingly connecting said motor means with said end portion, said thread means comprising a nut connected to one of said motor means and end portion and a screw connected to the other thereof, and at least one of the connections between said nut and its connected said one of said motor means and end portion, and said screw and its connected other thereof, including a universal joint allowing said thread means to move relative to said cutter head means for proper alignment between said nut and said screw.
Claim 6
Dependent Claim
26 words
A mining machine according to claim 3, wherein said thread means is self-locking to prevent it from being moved by force applied to said end portion.
Claim 7
Dependent Claim
25 words
A mining machine according to claim 3, wherein said nut is connected to said motor means and said screw is connected to said end portion.
Claim 8
Dependent Claim
216 words
A mining machine comprising supporting means, rotary cutter head means carried by said supporting means, gathering means operatively associated with said cutter head means for gathering material mined by said cutter head means, driving chain means drivingly connected to said cutter head means generally centrally thereof to be actuatable for rotatably driving said cutter head means, driving means connected to said driving chain means for actuating said driving chain means to rotatably drive said cutter head means, cutter means carried by said driving chain means for mining material during said actuation of said driving chain means, said actuation of said driving chain means causing said driving chain means to convey mined material towards said gathering means, said cutter head means including at least one extendible end portion, and moving means for moving said end portion, said moving means including rotary motor means and thread means drivingly connecting said motor means with said end portion, said thread means comprising a nut connected to said motor means and a screw connected to said end portion, and at least one of the connections between said motor means and nut, and screw and end portion, including a universal joint allowing said thread means to move relative to said cutter head means for proper alignment between said nut and said screw.
Claim 9
Dependent Claim
216 words
A mining machine comprising supporting means, rotary cutter head means carried by said supporting means, gathering means operatively associated with said cutter head means for gathering material mined by said cutter head means, driving chain means drivingly connected to said cutter head means generally centrally thereof to be actuatable for rotatably driving said cutter head means, driving means connected to said driving chain means for actuating said driving chain means to rotatably drive said cutter head means, cutter means carried by said driving chain means for mining material during said actuation of said driving chain means, said actuation of said driving chain means causing said driving chain means to convey mined material towards said gathering means, said cutter head means including at least one extendible end portion, and moving means for moving said end portion, said moving means including rotary motor means and thread means drivingly connecting said motor means with said end portion, said thread means comprising a nut connected to said motor means and a screw connected to said end portion, and at least one of the connections between said motor means and nut, and screw and end portion, including a universal joint allowing said thread means to move relative to said cutter head means for proper alignment between said nut and said screw.
Claim 10
Dependent Claim
26 words
A mining machine according to claim 6, wherein said thread means is self-locking to prevent it from being moved by force applied to said end portion.
Claim 11
Dependent Claim
299 words
A mining machine comprising a chassis, a boom mounted on said chassis for vertical movement thereto and projecting forwardly of said chassis, a horizontal cutter head rotatably mounted on the forward end of said boom, gathering means below said boom for gathering material mined by said cutter head, driving chain means drivingly connected to said cutter head generally centrally thereof to be longitudinally movable for rotatably driving said cutter head, driving means connected to said driving chain means for longitudinally driving said cutter chain means to cause said driving chain means to rotatably drive said cutter head, cutter means carried by said driving chain means for mining material during the driven longitudinal movement of said driving chain means, said driving chain means including upper and lower runs, the driven longitudinal movement of said driving chain means by said driving means causing said driving chain means to be driven in a direction whereby said lower run thereof is under driving tension and said driving chain means rearwardly conveys mined material towards said gathering means, said cutter head including extendible end portions, and moving means for moving said end portions, said moving means for each said end portion including rotary motor means and thread means drivingly connecting said motor means with the end portion, each said thread means being self-locking to prevent it from being moved by force applied to its respective said end portion, each sAid thread means comprising a nut connected to its respective said motor means and a screw connected to its respective said end portion, and at least one of the connections between each said motor means and nut, and screw and end portion, including a universal joint allowing the thread means to move relative to said cutter head for proper alignment between such nut and screw.
Claim 12
Dependent Claim
299 words
A mining machine comprising a chassis, a boom mounted on said chassis for vertical movement thereto and projecting forwardly of said chassis, a horizontal cutter head rotatably mounted on the forward end of said boom, gathering means below said boom for gathering material mined by said cutter head, driving chain means drivingly connected to said cutter head generally centrally thereof to be longitudinally movable for rotatably driving said cutter head, driving means connected to said driving chain means for longitudinally driving said cutter chain means to cause said driving chain means to rotatably drive said cutter head, cutter means carried by said driving chain means for mining material during the driven longitudinal movement of said driving chain means, said driving chain means including upper and lower runs, the driven longitudinal movement of said driving chain means by said driving means causing said driving chain means to be driven in a direction whereby said lower run thereof is under driving tension and said driving chain means rearwardly conveys mined material towards said gathering means, said cutter head including extendible end portions, and moving means for moving said end portions, said moving means for each said end portion including rotary motor means and thread means drivingly connecting said motor means with the end portion, each said thread means being self-locking to prevent it from being moved by force applied to its respective said end portion, each sAid thread means comprising a nut connected to its respective said motor means and a screw connected to its respective said end portion, and at least one of the connections between each said motor means and nut, and screw and end portion, including a universal joint allowing the thread means to move relative to said cutter head for proper alignment between such nut and screw.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-28 | 1978-04-29 | 1978-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-28 | 1982-04-29 | 1982-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-28 | 1986-04-29 | 1986-10-29 | $7700.00 | Window Closed / Lapsed |