Patent US3752242A successfully refreshed from Google Patents.
US3752242A
Expired / Lapsed
US
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Hydraulically actuated cavity forming device
Assignee: Individual
•
Filing: 1971-11-16
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Granted: 1973-08-14
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Expires: 1991-11-16
Abstract
Abstract A pair of longitudinally movable stems supported for generally vertical movement by a supporting and guiding structure on a mobile vehicle with the stems being extended and retracted by a unique actuating mechanism in the form of a hydraulically powered piston and cylinder assembly and an overdrive driving connecting with the stems for moving the stems a longitudinal distance twice the longitudinal extension and retraction of the piston and cylinder assembly. A hydraulic motor is provided for rotating the stems which are hollow and provided with an auger flight on the lower end thereof to facilitate insertion into the ground surface after which the stems may be slightly elevated to form an underground cavity into which an explosive charge may be introduced through the hollow stems for detonation, such as is employed in determining underground formations in underground surveys.
Inventors
- 👤 E Gremillion
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:09
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/02; E21B7/026; E21B19/00; E21B19/08; E21B19/084
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
351 words
A device for forming an underground cavity comprising a supporting frame adapted to be carried by a mobile vehicular structure, at least one stem extending generally vertically for longitudinal insertion into the soil, means guidingly supporting said stem from said frame to guide and support the stem during its longitudinal movement, and means interconnecting the frame and stem for extending and retracting the stem longitudinally, said means including a fluid pressure operated piston and cylinder assembly having a reciprocally movable power output rod, and overdrive means interconnecting the power output rod and the stem for moving the stem a longitudinal distance a multiple of the longitudinal distance of movement of the power output rod of the piston and cylinder assembly thereby enabling the stem to be forced downwardly into the ground a distance substantially greater than the over-all length of the piston and cylinder assembly, said means guiding and supporting the stem from the frame including a tubular sleeve rigid with the frame, a tubular member slidable longitudinally in the tubular sleeve, and said stem being longitudinally slidably movable in the tubular member, said tubular member being connected with power output rod for direct longitudinal reciprocation therewith whereby the guiding relationship of the stem within the tubular member is longitudinally reciprocated as the stem is longitudinally extended and retracted by operation of the piston and cylinder assembly, said overdrive means including a flexible chain member having one terminal end anchored with respect to the power output rod for movement therewith, an upwardly extending portion entrained over rotatable means journaled stationarily with respect to the frame, a downwardly extending portion entrained under journal means movable with the power output rod, an upwardly extending portion connected with the upper end of the stem and entrained over journal means movably supported with respect to the supportinG frame, a downwardly extending portion entrained under journal means rigid with respect to the frame and an upwardly extending portion anchored movably with respect to the supporting frame to provide a positive longitudinal reciprocation of the stem a distance substantially twice the movement of the power output rod.
Claim 2
Independent Claim
351 words
A device for forming an underground cavity comprising a supporting frame adapted to be carried by a mobile vehicular structure, at least one stem extending generally vertically for longitudinal insertion into the soil, means guidingly supporting said stem from said frame to guide and support the stem during its longitudinal movement, and means interconnecting the frame and stem for extending and retracting the stem longitudinally, said means including a fluid pressure operated piston and cylinder assembly having a reciprocally movable power output rod, and overdrive means interconnecting the power output rod and the stem for moving the stem a longitudinal distance a multiple of the longitudinal distance of movement of the power output rod of the piston and cylinder assembly thereby enabling the stem to be forced downwardly into the ground a distance substantially greater than the over-all length of the piston and cylinder assembly, said means guiding and supporting the stem from the frame including a tubular sleeve rigid with the frame, a tubular member slidable longitudinally in the tubular sleeve, and said stem being longitudinally slidably movable in the tubular member, said tubular member being connected with power output rod for direct longitudinal reciprocation therewith whereby the guiding relationship of the stem within the tubular member is longitudinally reciprocated as the stem is longitudinally extended and retracted by operation of the piston and cylinder assembly, said overdrive means including a flexible chain member having one terminal end anchored with respect to the power output rod for movement therewith, an upwardly extending portion entrained over rotatable means journaled stationarily with respect to the frame, a downwardly extending portion entrained under journal means movable with the power output rod, an upwardly extending portion connected with the upper end of the stem and entrained over journal means movably supported with respect to the supportinG frame, a downwardly extending portion entrained under journal means rigid with respect to the frame and an upwardly extending portion anchored movably with respect to the supporting frame to provide a positive longitudinal reciprocation of the stem a distance substantially twice the movement of the power output rod.
Claim 3
Dependent Claim
85 words
The structure as defined in claim 1 wherein said piston and cylinder assembly is mounted substantially parallel to the path of reciprocation of the stem and tubular member, the lower end of said cylinder being rigidly supported from said frame, a guide member movably supported from the upper end of the cylinder and forming a support for the journal means supported movably in relation to the frame and a terminal anchor point for the terminal end of a chain movable with respect to the frame.
Claim 4
Dependent Claim
80 words
The structure as defined in claim 2 wherein the lower end of the power output rod is connected to a crosshead having the lower end of the tubular member anchored thereto, said crosshead including power means drivingly connected with the stem for rotating the portion of the stem inserted in the ground, said stem including an auger flight on the lower end portion thereof to facilitate insertion of the stem into the ground without removing a column of dirt therefrom.
Claim 5
Dependent Claim
50 words
The structure as defined in claim 3 wherein said supporting frame includes a downwardly opening hollow cavity receiving the crosshead and power means for the stem when in retracted position to enable the lower end of the stem to be elevated to a position for movement over substantially any terrain.
Claim 6
Dependent Claim
92 words
The structure as defined in claim 4 wherein said stem is provided with a longitudinal bore therethrough for communication with the lower end of the stem and adapted to be communicated with a pressurized source of explosive mixture for introducing an explosive charge into a cavity formed underground when the stem has been inserted completely into the ground surface and then elevated a short distance whereby the flight on the lower end of the stem will form a relatively short cavity for receiving an explosive charge to be detonated during underground survey.
Claim 7
Dependent Claim
55 words
The structure as defined in claim 5 together with means mounting the frame from a vehicle for pivotal movement about a transverse axis to enable the piston and cylinder assembly, tubular member, sleeve and stem to be pivoted to an inoperative position in a horizontally inclined position to facilitate movement from one location to another.
Claim 8
Dependent Claim
22 words
The structure as defined in claim 6 wherein said piston and cylinder assembly and power means for the stem are hydraulically actuated.
Claim 9
Independent Claim
149 words
A device for simultaneously forming a pair of underground cavities comprising a supporting frame adapted to be carried by a mobile vehicular structure, a pair of parallel stems extending generally vertically for longitudinal insertion into the soil, means guidingly supporting said stems from said frame to guide and support the stems during their longitudinal movement, and means interconnecting the frame and stems for extending and retracting the stems longitudinally, said means including a fluid pressure operated piston and cylinder assembly having a reciprocally movable power output rod, and overdrive means interconnecting the power output rod and the stems for moving the stems a longitudinal distance a multiple of the longitudinal distance of movement of the power output rod of the piston and cylinder assembly thereby enabling the stems to be forced downwardly into the ground a distance substantially greater than the over-all length of the piston and cylinder assembly.
Claim 10
Independent Claim
149 words
A device for simultaneously forming a pair of underground cavities comprising a supporting frame adapted to be carried by a mobile vehicular structure, a pair of parallel stems extending generally vertically for longitudinal insertion into the soil, means guidingly supporting said stems from said frame to guide and support the stems during their longitudinal movement, and means interconnecting the frame and stems for extending and retracting the stems longitudinally, said means including a fluid pressure operated piston and cylinder assembly having a reciprocally movable power output rod, and overdrive means interconnecting the power output rod and the stems for moving the stems a longitudinal distance a multiple of the longitudinal distance of movement of the power output rod of the piston and cylinder assembly thereby enabling the stems to be forced downwardly into the ground a distance substantially greater than the over-all length of the piston and cylinder assembly.
Claim 11
Dependent Claim
125 words
The structure as defined in claim 8 wherein said overdrive means includes a pair of flexible members each having one terminal end anchored for movement with the power output rod, an upwardly extending portion entrained over means mounted stationarily with respect to the frame, a downwardly extending portion entrained under means movable with the power output rod, an upwardly extEnding portion connected with the upper end of the respective stem and entrained over means movably supported with respect to the frame, a downwardly extending portion entrained under means stationary with respect to the frame and an upwardly extending portion anchored for movement with the power output rod to move the stem a longitudinal distance substantially twice the distance of movement of the power output rod.
Claim 12
Dependent Claim
45 words
The structure as defined in claim 9 wherein the lower anchored terminal ends of the flexible members are anchored to a crosshead attached to the lower end of the power output rod, said crosshead being lowerable along with the terminal ends of the flexible members.
Claim 13
Independent Claim
230 words
A device for forming an underground cavity comprising a supporting frame adapted to be carried by a mobile vehicular structure, at least one stem extending generally vertically for longitudinal insertion into the ground, means guidingly supporting said stem from said frame to guide and support the stem during its longitudinal movement, and means interconnecting the frame and stem for longitudinally extending and retracting the stem, said means including a power drive having a power output member, and overdrive means interconnecting the power output member and the stem for moving the stem a longitudinal distance a multiple of the distance of movement of the power output member of the power device, said overdrive means including a flexible member having one terminal end anchored with respect to the power output member for movement therewith, an upwardly extending portion entrained over means mounted stationarily with respect to the frame, a downwardly extending portion entrained under means movable with the power output member, an upwardly extending portion connected with the upper end of the stem and entrained over means movably supported with respect to the supporting frame, a downwardly extending portion entrained under means stationary with respect to the frame and an upwardly extending portion anchored for movement with the power output member to move the stem a longitudinal distance substantially twice the distance of movement of the terminal ends of the flexible member.
Claim 14
Independent Claim
230 words
A device for forming an underground cavity comprising a supporting frame adapted to be carried by a mobile vehicular structure, at least one stem extending generally vertically for longitudinal insertion into the ground, means guidingly supporting said stem from said frame to guide and support the stem during its longitudinal movement, and means interconnecting the frame and stem for longitudinally extending and retracting the stem, said means including a power drive having a power output member, and overdrive means interconnecting the power output member and the stem for moving the stem a longitudinal distance a multiple of the distance of movement of the power output member of the power device, said overdrive means including a flexible member having one terminal end anchored with respect to the power output member for movement therewith, an upwardly extending portion entrained over means mounted stationarily with respect to the frame, a downwardly extending portion entrained under means movable with the power output member, an upwardly extending portion connected with the upper end of the stem and entrained over means movably supported with respect to the supporting frame, a downwardly extending portion entrained under means stationary with respect to the frame and an upwardly extending portion anchored for movement with the power output member to move the stem a longitudinal distance substantially twice the distance of movement of the terminal ends of the flexible member.
Claim 15
Dependent Claim
92 words
The structure as defined in claim 11 wherein said power output member is connected to a vertically reciprocal crosshead having the lower terminal end of the flexible member anchored thereto, said means guidingly supporting said stem including a vertically extending tubular member reciprocally guided in the frame and having the crosshead rigid with the lower end thereof, said stem being reciprocally mounted in the tubular member for extension and retraction and means on the upper end of the tubular member to which the upper terminal end of the flexible member is anchored.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |