US3640353A - Apparatus for excavation of deep holes and trenches - Google Patents
Apparatus for excavation of deep holes and trenches Download PDFInfo
- Publication number
- US3640353A US3640353A US791701*A US3640353DA US3640353A US 3640353 A US3640353 A US 3640353A US 3640353D A US3640353D A US 3640353DA US 3640353 A US3640353 A US 3640353A
- Authority
- US
- United States
- Prior art keywords
- rotatable bar
- grab bucket
- jaws
- trenches
- threaded portion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000009412 basement excavation Methods 0.000 title claims abstract description 16
- 230000035515 penetration Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 229910000278 bentonite Inorganic materials 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- -1 for example Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C3/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith and intended primarily for transmitting lifting forces to loose materials; Grabs
- B66C3/14—Grabs opened or closed by driving motors thereon
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
- E02F3/36—Component parts
- E02F3/40—Dippers; Buckets ; Grab devices, e.g. manufacturing processes for buckets, form, geometry or material of buckets
- E02F3/413—Dippers; Buckets ; Grab devices, e.g. manufacturing processes for buckets, form, geometry or material of buckets with grabbing device
- E02F3/4135—Dippers; Buckets ; Grab devices, e.g. manufacturing processes for buckets, form, geometry or material of buckets with grabbing device with grabs mounted directly on a boom
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/46—Dredgers; Soil-shifting machines mechanically-driven with reciprocating digging or scraping elements moved by cables or hoisting ropes ; Drives or control devices therefor
- E02F3/47—Dredgers; Soil-shifting machines mechanically-driven with reciprocating digging or scraping elements moved by cables or hoisting ropes ; Drives or control devices therefor with grab buckets
Definitions
- ABSTRACT This disclosure relates to an apparatus for the excavation of deep holes and trenches, which comprises a grab bucket Italy etc......... ...22880 A/68 [51] int. ....lE2llb 27/00 175/238, 202, 173; 37/183 whose jaws are carried by a rigid rotatable support bar and are connected by a pair of arms to a sleeve member which is screwed onto a threaded end portion of said support bar.
- Grab jaw apparatuses are also known whose jaws are actuated by hydraulic pistons fed by a fluid-operated unit with an electric motor housed in the same apparatus. In this case the feeding of power to the motor occurs through an electric cable.
- Such apparatuses are not, however, free from disadvantages, among which may be noted a not completely satisfactory earth penetration capacity of the grab bucket; a limitation of the power which may be transmitted to the grab bucket because of the connections of the latter with the control members; the difficulty of controlling the vertical relationship of the excavation, during the carrying out thereof, so that it has been necessary to employ expedients such as, for example, that of connecting the grab bucket to a rigid structure.
- the main object of the present invention is that of obviating the above-mentioned disadvantages by providing an apparatus for the excavation of deep holes and trenches in which the earth penetration capacity of the grab bucket is increased, wherein it is possible to transmit powers to the grab bucket which are considerably higher than those permitted by the apparatuses of known type, and still enables the vertical relationship of the excavation to be controlled during operation, particularly when excavations are carried out of trenches with vertical walls rendered stable for instance by the presence of bentonite-type muds.
- an apparatus for the excavation of holes and trenches of considerable depth characterized in that it comprises a grab bucket whose jaws are carried by a rigid rotatable support bar and are equally secured to said bar by a mechanical coupling designed to cause to opening and closing of the jaws due to the rotation of said rigid bar.
- FIG. 1 diagrammatically shows such apparatus wherein the grab bucket has jaws of rectangular cross section
- FIG. 2 shows in plan view a casing which covers the grab bucket
- FIG. 3 shows a modification of the apparatus in its embodiment with grab bucket having circular section jaws.
- the apparatus comprises an supporting arm 1 for raising the grab bucket and at the upper end of the arm there is suspended a rigid bar 2 which may be rotated by a rotatable plate 3.
- the lower end portion of the bar 2 is threaded in 4 and at the end of the bar is idly mounted a supporting member on which the jaws 5 of the grab bucket are pivoted.
- Such jaws are also connected, through rod members or arms 6, to a nut screw or internally threaded sleeve member 7 which is screwed onto the threaded portion 4 of the bar 2, thus providing a screw and nut screw coupling.
- the torque applied to the screw is counteracted, in the case of a rectangular section grab bucket (FIG. 1), by the ground through a casrng 8 whose surface IS such as to reduce the stresses on the walls of the excavation to always acceptable values irrespective of the nature of the ground.
- the entire weight of the rigid bar 2 acts on the grab bucket and actuates the latter, thus considerably increasing the earth penetration capacity of the grab bucket. Besides this it is possible, through the rigid bar, to transmit powers considerably above those permitted by the systems in use until now. Further, due to the rigid connection between the grab bucket and the control bar it is possible to control the vertical relationship of the excavation during the carrying out thereof.
- An apparatus for the excavation of holes and trenches of considerable depth comprising a supporting arm, a rigid rotatable bar holded at one end of said arm, means for rotating said rotatable bar, a supporting member arranged at the lower end of said rotatable bar in a nonrigid connection relationship therewith, a multijaw grab bucket having at least two jaws pivotally connected to said supporting member and capable of oscillating around a substantially horizontal axis, rod means having one end pivotally connected to said jaws of said grab bucket for actuating the opening and closing thereof and means for locking the apparatus against rotation during excavating operations inside said holes or trenches, wherein according to the improvement, the apparatus further comprises a threaded portion provided on the lower end length of said rotatable bar adjacent said supporting member, the length of said threaded portion being at least equal to the vertical movement component of said one end of said rod means, an internally threaded sleeve member engaging with the said threaded portion of said rotatable bar and pivotally holding the
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Earth Drilling (AREA)
- Load-Engaging Elements For Cranes (AREA)
Abstract
This disclosure relates to an apparatus for the excavation of deep holes and trenches, which comprises a grab bucket whose jaws are carried by a rigid rotatable support bar and are connected by a pair of arms to a sleeve member which is screwed onto a threaded end portion of said support bar.
Description
[ Feb. 8, 11972 Patent Motto [56] References Cited UNITED STATES mums Olson.....................................175/202 Giuseppe Bette, c/o Costruzioni Cemento 2,203,246 6/1940 Zum-Berge :...175/238 x ...175/23s x Compresso Fondisa S.p.A. Corso Europa 2,499,508 3/1950 Karhu 2,645,458 7/1953 3,113,629 12/1963 3 194,329 7/ l 965 11, Milan, Italy .llan. 16,1969
Appl. No.: 791,701
Yost.....
[22] Filed:
Allard...... ...l75/238 Wallers..............................l75/238 X Primary Examiner--David H. Brown 1 1 Fwugn Application Priority Dam Attorney-Guido Modiano and Albert Josif [57] ABSTRACT This disclosure relates to an apparatus for the excavation of deep holes and trenches, which comprises a grab bucket Italy............................. ...22880 A/68 [51] int. ....lE2llb 27/00 175/238, 202, 173; 37/183 whose jaws are carried by a rigid rotatable support bar and are connected by a pair of arms to a sleeve member which is screwed onto a threaded end portion of said support bar.
[58] Field of Search 1 Claims, 3 Drawing llfigum PATENIED FEB 8 I972 IN VENTOR. ppe BOTTO Giuse BY APPARATUS FOR EXCAVATION Oil" DEIEIP ll-llOlLlES AND 'IRENCHIES BACKGROUND OF THE INVENTION The present invention relates to an apparatus for the excavation of holes and trenches of considerable depth.
Many two-jaw apparatuses (in general grab buckets) are presently known for the excavation both of deep holes and trenches either opencast or in ambient of stabilizing fluids, for example, bentonite fluids, the opening and closing of such apparatus being controlled by means of a tackle arrangement actuated by cables which are controlled from above by means of suitable winches or hydraulic pistons controlled from the surface through a fluid-operated unit connected to the pistons by means of a suitable flexible tubing.
Grab jaw apparatuses are also known whose jaws are actuated by hydraulic pistons fed by a fluid-operated unit with an electric motor housed in the same apparatus. In this case the feeding of power to the motor occurs through an electric cable.
Such apparatuses are not, however, free from disadvantages, among which may be noted a not completely satisfactory earth penetration capacity of the grab bucket; a limitation of the power which may be transmitted to the grab bucket because of the connections of the latter with the control members; the difficulty of controlling the vertical relationship of the excavation, during the carrying out thereof, so that it has been necessary to employ expedients such as, for example, that of connecting the grab bucket to a rigid structure.
The main object of the present invention is that of obviating the above-mentioned disadvantages by providing an apparatus for the excavation of deep holes and trenches in which the earth penetration capacity of the grab bucket is increased, wherein it is possible to transmit powers to the grab bucket which are considerably higher than those permitted by the apparatuses of known type, and still enables the vertical relationship of the excavation to be controlled during operation, particularly when excavations are carried out of trenches with vertical walls rendered stable for instance by the presence of bentonite-type muds.
SUMMARY OF THE INVENTION According to the invention there is provided an apparatus for the excavation of holes and trenches of considerable depth, characterized in that it comprises a grab bucket whose jaws are carried by a rigid rotatable support bar and are equally secured to said bar by a mechanical coupling designed to cause to opening and closing of the jaws due to the rotation of said rigid bar.
BRIEF DESCRIPTION OF THE DRAWINGS The invention will appear more clearly from the following description of a preferred embodiment of an apparatus according to the invention, illustrated by way of example in the accompanying drawing, in which:
FIG. 1 diagrammatically shows such apparatus wherein the grab bucket has jaws of rectangular cross section;
FIG. 2 shows in plan view a casing which covers the grab bucket;
FIG. 3 shows a modification of the apparatus in its embodiment with grab bucket having circular section jaws.
With reference to said figures, the apparatus comprises an supporting arm 1 for raising the grab bucket and at the upper end of the arm there is suspended a rigid bar 2 which may be rotated by a rotatable plate 3. The lower end portion of the bar 2 is threaded in 4 and at the end of the bar is idly mounted a supporting member on which the jaws 5 of the grab bucket are pivoted. Such jaws are also connected, through rod members or arms 6, to a nut screw or internally threaded sleeve member 7 which is screwed onto the threaded portion 4 of the bar 2, thus providing a screw and nut screw coupling.
The torque applied to the screw is counteracted, in the case of a rectangular section grab bucket (FIG. 1), by the ground through a casrng 8 whose surface IS such as to reduce the stresses on the walls of the excavation to always acceptable values irrespective of the nature of the ground.
In the case of a grab bucket having jaws of circular section conventional means engage the walls of the hole and form an adequate reaction due to friction to said torque.
During the closing action of the jaws during excavation, the entire weight of the rigid bar 2 acts on the grab bucket and actuates the latter, thus considerably increasing the earth penetration capacity of the grab bucket. Besides this it is possible, through the rigid bar, to transmit powers considerably above those permitted by the systems in use until now. Further, due to the rigid connection between the grab bucket and the control bar it is possible to control the vertical relationship of the excavation during the carrying out thereof.
I claim:
ll. An apparatus for the excavation of holes and trenches of considerable depth, comprising a supporting arm, a rigid rotatable bar holded at one end of said arm, means for rotating said rotatable bar, a supporting member arranged at the lower end of said rotatable bar in a nonrigid connection relationship therewith, a multijaw grab bucket having at least two jaws pivotally connected to said supporting member and capable of oscillating around a substantially horizontal axis, rod means having one end pivotally connected to said jaws of said grab bucket for actuating the opening and closing thereof and means for locking the apparatus against rotation during excavating operations inside said holes or trenches, wherein according to the improvement, the apparatus further comprises a threaded portion provided on the lower end length of said rotatable bar adjacent said supporting member, the length of said threaded portion being at least equal to the vertical movement component of said one end of said rod means, an internally threaded sleeve member engaging with the said threaded portion of said rotatable bar and pivotally holding the said rod means at the other end thereof, said rod means preventing rotation of said sleeve member with respect to said supporting member, whereby the rotation of said rotatable bar causes said sleeve member to move along said threaded portion of said rotatable bar effecting the opening and closing of said jaws of said grab bucket in the excavating operation.
Claims (1)
1. An apparatus for the excavation of holes and trenches of considerable depth, comprising a supporting arm, a rigid rotatable bar holded at one end of said arm, means for rotating said rotatable bar, a supporting member arranged at the lower end of said rotatable bar in a nonrigid connection relationship therewith, a multijaw grab bucket having at least two jaws pivotally connected to said supporting member and capable of oscillating around a substantially horizontal axis, rod means having one end pivotally connected to said jaws of said grab bucket for actuating the opening and closing thereof and means for locking the apparatus against rotation during excavating operations inside said holes or trenches, wherein according to the improvement, the apparatus further comprises a threaded portion provided on the lower end length of said rotatable bar adjacent said supporting member, the length of said threaded portion being at least equal to the vertical movement component of said one end of said rod means, an internally threaded sleeve member engaging with the said threaded portion of said rotatable bar and pivotally holding the said rod means at the other end thereof, said rod means preventing rotation of said sleeve member with respect to said supporting member, whereby the rotation of said rotatable bar causes said sleeve member to move along said threaded portion of said rotatable bar effecting the opening and closing of said jaws of said grab bucket in the excavating operation.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT2288068 | 1968-10-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3640353A true US3640353A (en) | 1972-02-08 |
Family
ID=11201480
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US791701*A Expired - Lifetime US3640353A (en) | 1968-10-23 | 1969-01-16 | Apparatus for excavation of deep holes and trenches |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US3640353A (en) |
| AT (1) | AT303635B (en) |
| BE (1) | BE736488A (en) |
| CH (1) | CH514039A (en) |
| DE (1) | DE1952116A1 (en) |
| ES (1) | ES370671A1 (en) |
| FR (1) | FR2021338A1 (en) |
| GB (1) | GB1200575A (en) |
| LU (1) | LU59179A1 (en) |
| NL (1) | NL6915710A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1216936A (en) * | 1967-12-23 | 1970-12-23 | Orenstein & Koppel Ag | Machines for digging deep narrow trenches |
| US4106225A (en) * | 1977-03-07 | 1978-08-15 | Schnabel Foundation Company | Method and apparatus for excavating underpinning holes |
| DE3805868A1 (en) * | 1988-02-25 | 1989-09-07 | Hochtief Ag Hoch Tiefbauten | Rope-guided trench-wall grab |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1618294A (en) * | 1926-03-30 | 1927-02-22 | Olson Joseph | Underreamer |
| US2203246A (en) * | 1938-11-01 | 1940-06-04 | Estate Of Emil H Zum Berge | Underreamer |
| US2499508A (en) * | 1948-10-15 | 1950-03-07 | Ilmar J Karhu | Well digger |
| US2645458A (en) * | 1950-07-29 | 1953-07-14 | Yost Merrill | Hole boring rig |
| US3113629A (en) * | 1960-11-29 | 1963-12-10 | Benoto Sa | Boring apparatus whose opening is adjustable |
| US3194329A (en) * | 1964-06-11 | 1965-07-13 | Calweld Inc | Hydraulic grab bucket |
-
1969
- 1969-01-16 US US791701*A patent/US3640353A/en not_active Expired - Lifetime
- 1969-04-17 GB GB19739/69A patent/GB1200575A/en not_active Expired
- 1969-07-23 ES ES370671A patent/ES370671A1/en not_active Expired
- 1969-07-24 BE BE736488D patent/BE736488A/xx unknown
- 1969-07-28 LU LU59179D patent/LU59179A1/xx unknown
- 1969-10-13 CH CH1535269A patent/CH514039A/en not_active IP Right Cessation
- 1969-10-14 FR FR6935116A patent/FR2021338A1/fr not_active Withdrawn
- 1969-10-16 NL NL6915710A patent/NL6915710A/xx unknown
- 1969-10-16 DE DE19691952116 patent/DE1952116A1/en active Pending
- 1969-10-21 AT AT991169A patent/AT303635B/en not_active IP Right Cessation
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1618294A (en) * | 1926-03-30 | 1927-02-22 | Olson Joseph | Underreamer |
| US2203246A (en) * | 1938-11-01 | 1940-06-04 | Estate Of Emil H Zum Berge | Underreamer |
| US2499508A (en) * | 1948-10-15 | 1950-03-07 | Ilmar J Karhu | Well digger |
| US2645458A (en) * | 1950-07-29 | 1953-07-14 | Yost Merrill | Hole boring rig |
| US3113629A (en) * | 1960-11-29 | 1963-12-10 | Benoto Sa | Boring apparatus whose opening is adjustable |
| US3194329A (en) * | 1964-06-11 | 1965-07-13 | Calweld Inc | Hydraulic grab bucket |
Also Published As
| Publication number | Publication date |
|---|---|
| NL6915710A (en) | 1970-04-27 |
| DE1952116A1 (en) | 1970-05-21 |
| FR2021338A1 (en) | 1970-07-24 |
| AT303635B (en) | 1972-12-11 |
| BE736488A (en) | 1969-12-31 |
| LU59179A1 (en) | 1969-12-05 |
| GB1200575A (en) | 1970-07-29 |
| ES370671A1 (en) | 1971-11-01 |
| CH514039A (en) | 1971-10-15 |
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