US3652175A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable multiple spindler drill head
Assignee: Standard Tool & Manufacturing Co
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Filing: 1970-07-13
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Granted: 1972-03-28
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Expires: 1990-07-13
Abstract
Abstract The adjustable drill head of the multiple spindle type has particular use in transfer or like machine lines as it can produce different diametrically and angularly spaced drill holes which heretofore required a number of fixed multiple spindle drill heads although requiring an increase in time. The cost of each fixed multiple spindle drill head and the number required for different diameters and number of holes to be drilled results in a cost which is extremely high. When drilling a flange, such as on a pipe, pump casting and those of other devices, a pair of spindles are adjustably spaced to the diameter between the drilled holes and are indexed to different angular positions to produce a multiple of holes spaced equal distance apart within the time required to perform prior or subsequent machining operations at other stations in the line.
Inventors
- 👤 William D Walters
- 👤 Robert J Doocey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:46
CPC Classifications
B; B23; B23B; B23B39/00; B23B39/16; B23B39/161; B23B39/165; Y; Y10; Y10T; Y10T408/00; Y10T408/36; Y10T408/38; Y10T408/3811; Y10T74/00; Y10T74/14; Y10T74/1476
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
259 words
In a multiple spindle drill head, a pair of shafts for driving a pair of spindles, a support, a drive shaft journaled in said support for driving both spindle shafts, a head for carrying said spindle driving shafts and driving means therefor from said drive shaft, a housing supporting said head for arcuate advancement and reciprocal movement, a piston on said support for advancing and retracting said head, a pair of flat gears carried by said housing and head having facing teeth which are movable into and out of engagement with each other upon the axial movement of the head, a ring gear on said head, a rack having teeth meshable with the teeth of the ring gear but out of engagement therewith when the facing teeth of the pair of gears are engaged, means for advancing said rack when the teeth of the ring gear are in engagement with the teeth thereof and the facing teeth of the pair of flat gears are out of engagement for indexing the head a predetermined amount after which when the facing teeth of the pair of gears are in engagement the rack is retractable to its initial position, a housing for each spindle slidably mounted on the diameter at the end of the head toward and away from each other and the center of the head, clamping means for securing said spindle housings in fixed relation after adjustment, and universal drive means between the spindle driving shafts and the spindles which are driven in different positions of adjustment of the housings.
Claim 2
Dependent Claim
259 words
In a multiple spindle drill head, a pair of shafts for driving a pair of spindles, a support, a drive shaft journaled in said support for driving both spindle shafts, a head for carrying said spindle driving shafts and driving means therefor from said drive shaft, a housing supporting said head for arcuate advancement and reciprocal movement, a piston on said support for advancing and retracting said head, a pair of flat gears carried by said housing and head having facing teeth which are movable into and out of engagement with each other upon the axial movement of the head, a ring gear on said head, a rack having teeth meshable with the teeth of the ring gear but out of engagement therewith when the facing teeth of the pair of gears are engaged, means for advancing said rack when the teeth of the ring gear are in engagement with the teeth thereof and the facing teeth of the pair of flat gears are out of engagement for indexing the head a predetermined amount after which when the facing teeth of the pair of gears are in engagement the rack is retractable to its initial position, a housing for each spindle slidably mounted on the diameter at the end of the head toward and away from each other and the center of the head, clamping means for securing said spindle housings in fixed relation after adjustment, and universal drive means between the spindle driving shafts and the spindles which are driven in different positions of adjustment of the housings.
Claim 3
Dependent Claim
72 words
In a multiple spindle drill head as recited in claim 1, wherein a lead screw has left and right hand threads on opposite ends rotatably supported by said head against endwise movement, and sections of a left and right hand lead screw thread in the same side of the spindle housings engaged by the respective threads of said lead screw for advancing and retracting said heads when the lead screw is rotated.
Claim 4
Dependent Claim
44 words
In a multiple spindle drill head as recited in claim 2, wherein the opposite sides of the spindle housings has aligned slots therein, clamping bars in said slots, and screws for securing said bars to said head for clamping said spindle housings after adjustment.
Claim 5
Dependent Claim
42 words
In a multiple spindle drill head as recited in claim 3, wherein said spindle housings are accurately positioned in spaced relations by a gauge block of predetermined length against which said spindle housings are moved by the rotation of said lead screw.
Claim 6
Dependent Claim
40 words
In a multiple spindle drill head as recited in claim 4, wherein the head is indexed a predetermined angular distance by the advancement of said rack limited by a gauge block in the path of movement of the end thereof.
Claim 7
Dependent Claim
52 words
In a multiple spindle drill head as recited in claim 5, wherein a gear is provided on the drive shaft for the pair of spindles, a gear train having a gear driven by said drive shaft for driving said pair of spindLe driving gears at a predetermined speed through said gear train.
Claim 8
Dependent Claim
61 words
In a multiple spindle drill head as recited in claim 6, wherein said gear engaged by the gear on the drive shaft advances with said head and is retained in engagement with said drive shaft gear by having longer teeth thereon so as to remain in meshed relation with the teeth of the drive shaft gear in all positions of advancement.
Claim 9
Dependent Claim
39 words
In a multiple spindle drill head as recited in claim 7, wherein after the head is indexed it is accurately located upon the retraction of the head by the engagement of the facing teeth of said pair of gears.
Claim 10
Dependent Claim
40 words
In a multiple spindle drill head as recited in claim 8, wherein the gears with the facing teeth are so located that the pressure produced by the work performing operation more securely forces the facing teeth into more secure engagement.
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) | 1975-03-28 | 1975-09-27 | 1976-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-28 | 1979-09-27 | 1980-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-28 | 1983-09-27 | 1984-03-28 | $7700.00 | Window Closed / Lapsed |