Patent US3695718A successfully refreshed from Google Patents.
US3695718A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Raise boring machine
Assignee: Individual
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Filing: 1970-11-09
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Granted: 1972-10-03
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Expires: 1990-11-09
Abstract
Abstract A raise boring machine for producing a raise of circular cross section has a main frame with a rotating drum which has two rotating tangentially cutting heads. Three wall engaging shoes are suspended in rods in toggle arrangements and they are biased outwardly against the wall of the raise by means of spring devices braced between the shoes. By this arrangement these shoes guide the machine by sliding on the wall during a cutting advance of the main frame effected by means of six advance jacks connected between the main frame and a rear anchoring frame. During the time that the anchoring frame is released from the raise and pulled forward by the advance jacks, however, the same shoes hold the main frame firmly in the raise as a result of the action of the toggle joints. Steering is effected by moving the rear portion of the main frame sidewise in the anchoring frame in any desired direction.
Inventors
- 👤 Ernst Abraham Lauber
- 👤 Pieter Barendsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:18
CPC Classifications
E; E21; E21D; E21D9/00; E21D9/10; E21D9/003; E21D9/02; E21D9/1093; E21D9/11; E21D9/116
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
199 words
A raise boring machine for producing a raise of circular cross section, comprising a main frame, a drum member rotatably mounted in the main frame for rotating about the central longitudinal axis of the machine which axis normally coincides with the axis of the raise being bored, motor means for rotating the drum member, a plurality of cutter heads mounted on the drum member for cutting in the face of the raise, an anchoring device movable with respect to the main frame and arranged to be immobilized in the raise, power means for moving the main frame and the anchoring device longitudinally relative to each other, a plurality of wall engaging shoes mounted to the main frame so as to be movable radially thereto, means for biasing said shoes against the wall of the raise being bored, linkage means coupled between the main frame and the shoes for exerting outwardly directed forces to the shoes so as to prevent the shoes and thereby the machine from sliding backwards when the anchoring device is released, but permitting the shoes and thereby the main frame to slide forwards when the anchoring device is immobilized and the main frame is being advanced.
Claim 2
Dependent Claim
199 words
A raise boring machine for producing a raise of circular cross section, comprising a main frame, a drum member rotatably mounted in the main frame for rotating about the central longitudinal axis of the machine which axis normally coincides with the axis of the raise being bored, motor means for rotating the drum member, a plurality of cutter heads mounted on the drum member for cutting in the face of the raise, an anchoring device movable with respect to the main frame and arranged to be immobilized in the raise, power means for moving the main frame and the anchoring device longitudinally relative to each other, a plurality of wall engaging shoes mounted to the main frame so as to be movable radially thereto, means for biasing said shoes against the wall of the raise being bored, linkage means coupled between the main frame and the shoes for exerting outwardly directed forces to the shoes so as to prevent the shoes and thereby the machine from sliding backwards when the anchoring device is released, but permitting the shoes and thereby the main frame to slide forwards when the anchoring device is immobilized and the main frame is being advanced.
Claim 3
Dependent Claim
81 words
A raise boring machine as claimed in claim 1 in which said shoes on said main frame are arranged at the front end of the raise boring machine; said anchoring device is arranged at the rear end of the raise boring machine, and power jacks are arranged for moving the rear portion of the main frame relative to the anchoring device in directions transverse to the longitudinal axis of the raise so as to effect steering of the raise boring machine.
Claim 4
Dependent Claim
69 words
A raise boring machine as claimed in claim 1 in which said cutter heads are rotatably mounted in the drum member, motors are arranged to rotate the cutter heads, and the cutter heads have cutters extending radially from their circular front so that the cutter heads cut tangentially in screw-formed paths upon simultaneous rotation of the cutter heads, rotation of the drum member, and advancing of the main frame.
Claim 5
Dependent Claim
63 words
A raise boring machine as claimed in claim 1 in which said linkage means comprise rods which are pivotally connected to the main frame with their upper ends and pivotally connected to the shoes with their lower ends so as to suspend the shoes in the main frame, each shoe being suspended in two rods whose longitudinal axes intersect at an obtuse angle.
Claim 6
Dependent Claim
23 words
A raise boring machine as claimed in claim 4 in which the main frame is provided with means for guiding the shoes radially.
Claim 7
Dependent Claim
49 words
A raise boring machine as claimed in claim 4 in which said shoes mounted to said main frame are uniformly angularly spaced in a plane transverse to the raise, and said biasing means are braced between the adjacent shoes to bias the shoes against the wall of the raise.
Claim 8
Dependent Claim
65 words
A raise boring machine as claimed in claim 4 in which said biasing means comprise a cylinder and a hydraulically actuated piston movable therein, a spring for extending said piston, and means for supplying hydraulic fluid to the pressure chamber of said cylinder so as to cause retraction of said pistons and thereby pull the shoes out of engagement with the wall of the raise.
Claim 9
Dependent Claim
63 words
A raise boring machine as claimed in claim 7, in which said anchoring device includes a plurality of wall engaging shoes, and a plurality of hydraulically actuated power jacks arranged to brace said shoes firmly against the wall of the raise so as to immobilize the anchoring device in the raise when the pressure chambers of the jacks are pressurized by hydraulic fluid.
Claim 10
Dependent Claim
88 words
A raise boring machine as claimed in claim 8 in which said pressure chamber of the power jacks for actuating the shoes of the anchoring device are connected to a common supply conduit, and said pressure chambers of the cylinder for actuating the shoes of the main frame are connected to a pilot actuated check valve which is controlled by the pressure in said common supply conduit so as to drain said pressure chambers of the piston and cylinder means when this pressure is below a limit pressure.
Claim 11
Dependent Claim
101 words
A raise boring machine as claimed in claim 8 in which said means for supplying hydraulic fluid to the pressure chamber of said cylinder comprises a pump driven by an electric motor, the pressure chamber of each of the power jacks of the anchoring device being connected to one of a plurality of pressure actuated electric switches, which are biased to disconnected state, so as to close its associated switch only when the pressure in the respective pressure chamber is above a limit pressure, and said electric switches are connected in series in an electric circuit for actuating said electric motor.
Claim 12
Dependent Claim
91 words
A raise boring machine as claimed in claim 10 in which said pressure chambers of the power jacks for actuating the shoes of the anchoring device are connected to a common supply conduit, and said pressure chambers of the piston and cylinder means for actuating the shoes of the main frame are connected to a pilot actuated check valve which is controlled by the pressure in said common supply conduit so as to drain said pressure chambers of the piston and cylinder means when this pressure is below a limit pressure.
Claim 13
Dependent Claim
128 words
A raise boring machine as claimed in claim 11 in which: said anchoring device comprises a number of arc-formed shoe units which are angularly spaced uniformly in a plane transverse to the raise, power jacks are connected between all adjacent ends of said shoe units for pressing the shoe units against the wall of the raise, said main frame is guided by the shoe units of the anchoring device so as to be movable both longitudinally and radially with respect to each of the shoe units, and said power jacks for effecting steering are arranged to move said main frame tangentially with respect to each of said shoe units of the anchoring device, thE tangential movements creating simultaneous radial movements between said main frame and the shoe units.
Claim 14
Dependent Claim
89 words
A raise boring machine as claimed in claim 12, in which said anchoring device has three shoe units, three double-acting power jacks are arranged for effecting steering, the angle between the power jacks for effecting steering is 60*, and each power jack for effecting steering is firmly connected to either of the main frame and one of the shoe units, but connected to the other one of said main frame and said shoe unit by means of a sliding connection which permits movement both in longitudinal and radial directions.
Claim 15
Dependent Claim
167 words
A raise boring machine as claimed in claim 13 in which: each of said steering jacks has two pressure chambers which are connected to one of three direction control valves; each of said direction control valves has a first position in which movement in one direction of the steering jack to which it is connected is effected, and a second position in which movement in the other direction is effected; each of said steering jacks is balanced with respect to its piston surfaces; the three steering jacks are, connected in series to a source of hydraulic fluid through said control valve; and a conduit, which includes a control valve having an open and a closed position, is connected in parallel with the direction control valve of one of said steering jacks; said one of said steering jacks has half the piston area of each of the other two steering jacks; and said direction control valve of said one of the steering jacks has also a closed position.
Claim 16
Dependent Claim
201 words
A raise boring machine for producing a raise of circular cross section, comprising a main frame, a drum member rotatably mounted in said main frame for rotating about a central longitudinal axis of the machine which axis normally coincides with the axis of the raise being driven, motor means for rotating said drum member, at least one cutter head mounted on the drum member for cutting in the face of the raise, a ring-shaped anchoring device axially movable with respect to said main frame, power means for advancing the main frame with respect to the anchoring device, and a number of raise wall engaging shoes so mounted on the main frame as to be prevented from sliding rearwards by being pressed against the wall of the raise when the anchoring device is released but permitted to slide forwards on the wall when the main frame is advanced, said anchoring device comprising a number of arc-formed shoe units which are angularly spaced uniformly in a plane transverse to the raise, and power jacks connected between all adjacent ends of the shoe units for pressing the shoe units against the wall of the raise and thereby immobilizing the anchoring device in the raise.
Claim 17
Dependent Claim
201 words
A raise boring machine for producing a raise of circular cross section, comprising a main frame, a drum member rotatably mounted in said main frame for rotating about a central longitudinal axis of the machine which axis normally coincides with the axis of the raise being driven, motor means for rotating said drum member, at least one cutter head mounted on the drum member for cutting in the face of the raise, a ring-shaped anchoring device axially movable with respect to said main frame, power means for advancing the main frame with respect to the anchoring device, and a number of raise wall engaging shoes so mounted on the main frame as to be prevented from sliding rearwards by being pressed against the wall of the raise when the anchoring device is released but permitted to slide forwards on the wall when the main frame is advanced, said anchoring device comprising a number of arc-formed shoe units which are angularly spaced uniformly in a plane transverse to the raise, and power jacks connected between all adjacent ends of the shoe units for pressing the shoe units against the wall of the raise and thereby immobilizing the anchoring device in the raise.
Claim 18
Dependent Claim
78 words
A raise boring machine as claimed in claim 15 in which said shoes on said main frame are arranged at the front end of the raise driver, said anchoring device is arranged at the rear end of the raise driver, and power jacks are arranged for moving the rear portion of the main frame relative to the anchoring device in directions transverse to the longitudinal axis of the raise so as to effect steering of the raise driver.
Claim 19
Dependent Claim
86 words
A raise boring machine as claimed in claim 16, in which said main frame is guided by the shoe units of the anchoring device so as to be movable both longitudinally and radially with respect to each of the shoe units, but not turnable, and said power jacks for effecting steering are arranged to move said main frame tangentially with respect to each of said shoe units of the anchoring device, the tangential movements creating simultaneous radial movements between said main frame and the shoe units.
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) | 1975-10-03 | 1976-04-03 | 1976-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-03 | 1980-04-03 | 1980-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-03 | 1984-04-03 | 1984-10-03 | $7700.00 | Window Closed / Lapsed |