Patent US3952818A successfully refreshed from Google Patents.
US3952818A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grooving bucket
Assignee: Frankipile Australia Pty Ltd
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Filing: 1974-11-07
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Granted: 1976-04-27
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Expires: 1994-11-07
Abstract
Abstract A grooving bucket for forming grooves or bells in the ground around a previously drilled hole to allow casting of a concrete pile, the grooving bucket consisting of a cylindrical bucket portion fitted at the upper end with a boot or connecting box to fit the appropriate drilling machine kelly bar. Pivoted cutter arms protrude from each side of the bucket and are held in the horizontal or cutting position preferably by heavy duty tension springs. The cutters are hollow or channeled and are angled to cut a groove or bell in the ground on rotation of the bucket and to lead spoil or rock cuttings into the interior of the bucket. The bucket may be provided with a bottom hinged door to facilitate removal of spoil from inside the bucket.
Inventors
- 👤 Terence George Jasper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:53
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/003; E21B10/00; E21B10/26; E21B10/32
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
170 words
A grooving bucket for forming grooves or bells in the ground around a hole or socket that has been drilled into the ground to allow casting of a concrete pile, said grooving bucket comprising a cylindrical bucket portion adapted to be attached to a drilling machine, there being provided within the bucket portion at least one cutter which is movably mounted so as to be movable from a retracted position in which said cutter lies wholly within the circumference of the bucket portion, to a cutting position in which said cutter projects substantially radially from the circumference of the bucket, said cutter being held in the retracted position by means of a removable wedge and said cutter being movable from the retracted position to the cutting position be means of at least one tension spring attached to said cutter, and wherein said cutter is shaped to cause spoil to be led into the interiors of the bucket during the rotation of said bucket to cut a groove in the ground.
Claim 2
Dependent Claim
170 words
A grooving bucket for forming grooves or bells in the ground around a hole or socket that has been drilled into the ground to allow casting of a concrete pile, said grooving bucket comprising a cylindrical bucket portion adapted to be attached to a drilling machine, there being provided within the bucket portion at least one cutter which is movably mounted so as to be movable from a retracted position in which said cutter lies wholly within the circumference of the bucket portion, to a cutting position in which said cutter projects substantially radially from the circumference of the bucket, said cutter being held in the retracted position by means of a removable wedge and said cutter being movable from the retracted position to the cutting position be means of at least one tension spring attached to said cutter, and wherein said cutter is shaped to cause spoil to be led into the interiors of the bucket during the rotation of said bucket to cut a groove in the ground.
Claim 3
Dependent Claim
16 words
A grooving bucket as claimed in claim 1 wherein there are two cutters substantially diametrically opposed.
Claim 4
Dependent Claim
19 words
A grooving bucket as claimed in claim 2 wherein the cutters are channeled to allow spoil to pass therethrough.
Claim 5
Dependent Claim
28 words
A grooving bucket as claimed in claim 3 wherein the cutters are provided with chamferred faces adapted to cut vee-shaped grooves around the circumference of the drilled hole.
Claim 6
Dependent Claim
17 words
A grooving bucket as claimed in claim 4 wherein the cutters are provided with removable cutting teeth.
Claim 7
Dependent Claim
19 words
A grooving bucket as claimed in claim 2 wherein the cutters are hollow to allow spoil to pass therethrough.
Claim 8
Dependent Claim
28 words
A grooving bucket as claimed in claim 6 wherein the cutters are provided with chamferred faces adapted to cut vee-shaped grooves around the circumference of the drilled hole.
Claim 9
Dependent Claim
17 words
A grooving bucket as claimed in claim 7 wherein the cutters are provided with removable cutting teeth.
Claim 10
Dependent Claim
18 words
A grooving bucket as claimed in claim 1 wherein said cutter is pivotally mounted inside the bucket portion.
Claim 11
Dependent Claim
27 words
A grooving bucket as claimed in claim 1 wherein the removable wedge has a camming surface adapted to operate so as to facilitate removal of the wedge.
Claim 12
Dependent Claim
25 words
A grooving bucket as claimed in claim 10 wherein means are provided to operate the cam lever externally of the bucket to release the wedge.
Claim 13
Dependent Claim
20 words
A grooving bucket as claimed in claim 11 wherein the wedge is removable from the interior of the bucket portion.
Claim 14
Dependent Claim
45 words
A grooving bucket as claimed in claim 10 wherein the removable wedge comprises a wedge member adapted to hold the cutter in the retracted position, said wedge member being pivotally mounted on a cam lever adapted to operate so as to release the wedge member.
Claim 15
Dependent Claim
63 words
A grooving bucket as claimed in claim 1 which also includes an aperture formed through the wall thereof and wherein the wedge holds the cutter in the retracted position by means of a step cut into the wedge adapted to cooperate with the top edge of the aperture in the bucket portion through which the said cutter protrudes when in the cutting position.
Claim 16
Dependent Claim
21 words
A grooving bucket as claimed in claim 1 which also includes a hinged door for removal of spoil from the bucket.
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) | 1979-04-27 | 1979-10-27 | 1980-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-27 | 1983-10-27 | 1984-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-27 | 1987-10-27 | 1988-04-27 | $7700.00 | Window Closed / Lapsed |