Patent US3552504A successfully refreshed from Google Patents.
US3552504A
Expired / Lapsed
US
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Drill slide
Assignee: SECOMA
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Filing: 1969-03-25
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Granted: 1971-01-05
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Expires: 1989-03-25
Abstract
Abstract A drill slide supports at the center of its slide beam a rotary drive head having a motor, a drive chuck for a drive rod, and reducing gears. A translating carriage slides on the beam between the rear end of the beam and the rotary drive head and supports a thrust-bearing on the rear end of the drive rod. The carriage is moved by a double-acting hydraulic or pneumatic jack fixed to the beam. At the front of the beam is fixed a guide head and between the guide head and the rotary drive head the beam supports a rotatable barrel housing a drill and several drill extension shafts. The drive rod, the extension shafts and the drill have complementary threads and tappings at their couplable ends. Clamps are fixed on the barrel flanges to hold the drill or extension pieces for screwing and unscrewing. The drive rod and extension piece rear end are noncircular over the length of a threading. A free rotatory ring on the rear flange of the barrel is of suitable width to coordinate the coupling. A jack acting on a cam rotates the barrel to fixed angular positions to align the drill or extension shafts with the drive rod and a springretracted finger is displaced by hydraulic means into a detent to lock the angular position.
Inventors
- 👤 Louis Laurent Chappuis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:56
CPC Classifications
E; E21; E21B; E21B19/00; E21B19/20; E21B15/00; E21B15/006; E21B19/14; E21B19/146
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
239 words
A drill slide comprising: a slide beam supporting: a rotary drive head fixed substantially at the center of the slide and comprising a motor, a drive chuck for a drive rod and a set of reducing gears, a translating carriage comprising a thrustbearing in support on the rear end of the drive rod and mounted sliding on the beam between the rear end of the beam and said rotary drive head, said carriage being axially connected to the cylinder of a double-acting first jack of which the rod is coupled to the rear end of the slide beam, a guide head fixed at the front end of the slide beam, and between the said guide head and the rotary drive head, a barrel having a front and rear flange and several housings of which one contains the drill and the others the drill extension pieces, said barrel being equipped with rotary drive means to drive it through fractions of a turn into predetermined angular positions in order to bring said housing successively into a drilling axis, which is the axial extension of the drive rod, the front ends of the drive rod and the rear of the drill having screw means and the corresponding ends of each extension piece being provided with complementary screw means, and rotation-immobilizing means for successively immobilizing the extension piece and the drill on screwing and inversely the drill and the extension piece on unscrewing.
Claim 2
Dependent Claim
239 words
A drill slide comprising: a slide beam supporting: a rotary drive head fixed substantially at the center of the slide and comprising a motor, a drive chuck for a drive rod and a set of reducing gears, a translating carriage comprising a thrustbearing in support on the rear end of the drive rod and mounted sliding on the beam between the rear end of the beam and said rotary drive head, said carriage being axially connected to the cylinder of a double-acting first jack of which the rod is coupled to the rear end of the slide beam, a guide head fixed at the front end of the slide beam, and between the said guide head and the rotary drive head, a barrel having a front and rear flange and several housings of which one contains the drill and the others the drill extension pieces, said barrel being equipped with rotary drive means to drive it through fractions of a turn into predetermined angular positions in order to bring said housing successively into a drilling axis, which is the axial extension of the drive rod, the front ends of the drive rod and the rear of the drill having screw means and the corresponding ends of each extension piece being provided with complementary screw means, and rotation-immobilizing means for successively immobilizing the extension piece and the drill on screwing and inversely the drill and the extension piece on unscrewing.
Claim 3
Dependent Claim
95 words
A drill slide according to claim 1, wherein said rotation-immobilizing means are constituted by a front clamp and rear clamps each comprising two V-shaped jaws adapted for approach and separating movement under the action of a second jack, said front clamp being fixed on the guide head and the rear clamps being fixed on one of the flanges of said barrel, each clamp being located in correspondence with one of the housings provided in the barrel with their jaws situated on both sides of a guide orifice for the drill or the corresponding extension piece.
Claim 4
Dependent Claim
191 words
A drill slide according to claim 1, wherein over a length corresponding at least to that of one of its threadings, the rear end of each extension piece is of the same cross section as the drive rod, and the rear flange of the barrel bears a ring free in rotation of which the bore has also the same cross section as the drive rod, the stroke-end position of said carriage-manipulating jack corresponding to the withdrawal position of the carriage being such that the rear end of the extension piece and the front end of the drive rod are both located inside the said ring, the length and the angular position of the screw means ensuring the coupling between the the drive rod and each of the extension pieces being such that at the end of screwing, the identical sections of the drive rod and of the rear end of the extension piece considered are in complete concordance, and the length of said ring being such that after unscrewing from the front end of the extension piece, the front end of the drive rod is outside the bore of said ring.
Claim 5
Dependent Claim
58 words
A drill slide according to claim 1 including a cradle connected in translation to the rear part of the cylinder of said first jack, said carriage being mounted free in translation on said cradle, two stops being provided to bound the path of the carriage to be equal at least to twice the length of said screw means.
Claim 6
Dependent Claim
60 words
A drill slide according to claim 1, wherein said rotary drivE means is a double-acting jack fixed externally to the guide head, and a drive cam on said barrel on which the rod of the jack forming the rotary drive means acts to subject it to an angular displacement, whose value is predetermined by the number of said extension pieces.
Claim 7
Dependent Claim
87 words
A drill slide according to claim 1, including means to immobilize the barrel in each of said angular positions, comprising, on one hand, in the guide head, a retractable finger and, on the other hand, in the front flange of the barrel, a plurality of housings for spring means holding said finger normally in retracted position, and displacing means for displacing the finger at opportune time, into one of said spring means housings, in order to ensure the locking of the barrel in a said angular position.
Claim 8
Dependent Claim
58 words
A drill slide according to claim 2, including a cradle connected in translation to the rear part of the cylinder of said first jack, said carriage being mounted free in translation on said cradle, two stops being provided to bound the path of the carriage to be equal at least to twice the length of said screw means.
Claim 9
Dependent Claim
58 words
A drill slide according to claim 3, including a cradle connected in translation to the rear part of the cylinder of said first jack, said carriage being mounted free in translation on said cradle, two stops being provided to bound the path of the carriage to be equal at least to twice the length of said screw means.
Claim 10
Dependent Claim
88 words
A drill slide a according to claim 3, including means to immobilize the barrel in each of said angular positions, comprising, on one hand, in the guide head, a retractable finger and, on the other hand, in the front flange of the barrel, a plurality of housings for spring means holding said finger normally in retracted position, and displacing means for displacing the finger at opportune time, into one of said spring means housings, in order to ensure the locking of the barrel in a said angular position.
Claim 11
Dependent Claim
87 words
A drill slide according to claim 5, including means to immobilize the barrel in each of said angular positions, comprising on one hand, in the guide head, a retractable finger and, on the other hand, in the front flange of the barrel, a plurality of housings for spring means holding said finger normally in retracted position, and displacing means for displacing the finger at opportune time, into one of said spring means housings, in order to ensure the locking of the barrel in a said angular position.
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) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |