US3730637A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tool holder locking device for rotating spindles
Assignee: Individual
•
Filing: 1970-10-30
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Granted: 1973-05-01
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Expires: 1990-10-30
Abstract
Abstract A locking device for releasably securing a work tool holder to a rotating spindle. This locking device is centrally mounted within the rotating spindle to rotate therewith and includes a bushing with a lock shank extending downwardly with radially extending projection adapted to engage with projections on the inner end of the tool holder. Cam slot means are provided upon the lock member to effect a turning of the lock member for engagement of the projections of the lock member with the projections of the tool holder, an operating rod extends upwardly from the lock member within the spindle and spring biasing means urging the upward movement of the operating member, the operating member is confined against rotation while being depressed and has pin projections entering the dog-leg slots of the lock member so that as the rod is depressed the lock member will be rotated to engage the lock projections with or disengage them from the tool holder. The rotating spindle is carried in a spindle support which is in turn supported upon an arbor arm of a drill press. The tool holders are easily released by a mere use of a tool for depressing the operating rod at the upper end of the spindle. Centering means is provided for locating the tool holder in the proper angular relationship and alignment with the locking projections of the locking member. The spindles and the lock devices are self contained and can be mounted singularly or in multiple numbers in a supporting frame.
Inventors
- 👤 V Cellini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:29
CPC Classifications
B; B23; B23B; B23B31/00; B23B31/02; B23B31/24; B23B31/26; B23B31/261; B23B31/268; Y; Y10; Y10T; Y10T408/00; Y10T408/94; Y10T408/95; Y10T409/00; Y10T409/30; Y10T409/309352; Y10T409/309408
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
168 words
In combination, a vertically extending spindle support, a spindle assembly journaled for rotation in the vertically extending spindle support, said spindle having an open bottom end portion, a tool holder conforming to the opening in the bottom end portion and engagable with the bottom end face of the spindle, said tool holder having a central opening adapted to receive a rotating tool element, and a locking device releaseably engagable with the upper end of the spindle tool holder and extending centrally upwardly through the rotating spindle, said lock device including the vertically extending operable rod and means at the upper end of the spindle for holding the operating rod against rotation while effecting a downward thrust of the operating rod and said locking member having dog-leg shaped slot therein and means on the operating rod engaging the dog-leg slot to cause rotation of the lock member with the operating rod being vertically depressed to affect engagement of the locking member with the upper end of the tool holder.
Claim 2
Dependent Claim
168 words
In combination, a vertically extending spindle support, a spindle assembly journaled for rotation in the vertically extending spindle support, said spindle having an open bottom end portion, a tool holder conforming to the opening in the bottom end portion and engagable with the bottom end face of the spindle, said tool holder having a central opening adapted to receive a rotating tool element, and a locking device releaseably engagable with the upper end of the spindle tool holder and extending centrally upwardly through the rotating spindle, said lock device including the vertically extending operable rod and means at the upper end of the spindle for holding the operating rod against rotation while effecting a downward thrust of the operating rod and said locking member having dog-leg shaped slot therein and means on the operating rod engaging the dog-leg slot to cause rotation of the lock member with the operating rod being vertically depressed to affect engagement of the locking member with the upper end of the tool holder.
Claim 3
Dependent Claim
68 words
The combination, as defined in claim 1, and said locking member comprising a bushing journaled in said spindle and a depending shank, radially extending projections on the lower end of the depending shank and said tool holder having inwardly extending projections circumferentially spaced about the opening therein and said lock member projections upon being turned will provide locking engagement with the inwardly extending projections of the tool holder.
Claim 4
Dependent Claim
95 words
The combination, as defined in claim 2, and said spindle support having an open upper end, said spindle assembly including an extension connected to the spindle for rotation therewith and the supporting ring for the extension extended over the open end of the spindle support, a bushing connected to the operating rod and guide means provided between the bushing and the spindle extension to confine the movement of the operating rod in an axial direction, and drive gear means drivingly secured to the upper end of the extension to effect the rotation of the spindle.
Claim 5
Dependent Claim
86 words
The combination, as defined in claim 3, and said operating rod extending upwardly through said bushing, said operating rod being threaded on its upper end and an adjusting nut on the threaded end of the rod for adjusting the operating position of the rod and guide means relative to the extension, a top nut threadedly engaging the upper end of the rod and adjustable thereupon and a lock nut for holding the top nut in its adjusted position upon the threaded upper end of the rod.
Claim 6
Dependent Claim
48 words
The combination, as defined in claim 4, and a compression spring surrounding the operating rod, said spindle having a spring chamber shouldered at its bottom end and receiving one end of the spring and the upper end of the spring engaging said guide bushing in the spindle extension.
Claim 7
Dependent Claim
67 words
The combination, as defined in claim 1, and said bottom portion of the spindle having a tapered opening and said tool holder having a conical portion adapted to fit the tapered opening of the spindle bottom portion and a flange having flush engagement with the bottom end face of the spindle when the tool holder is secured in locked engagement with the bottom portion of the spindle.
Claim 8
Dependent Claim
93 words
The combination, as defined in claim 1, and a centering lug depending from the bottom end face of the spindle and the flange of the tool holder having a cooperating recess for receiving the depending lug, said centering lug on the spindle being in vertical alignment with lock projections on the lock member to align the tool holder inwardly extending projections so that the spaces between the projections will be automatically aligned with the radial projections on the lock member upon the tool holder being inserted in the bottom portion of the spindle.
Claim 9
Dependent Claim
48 words
The combination, as defined in claIm 2, and said radially extending locking projections having an incline top faces and said inwardly extending projections on the tool holder having cooperating under faces whereby the projections of the lock member and the tool holder will be effected with wedging action.
Claim 10
Dependent Claim
58 words
The combination, as defined in claim 1, and said lock member having pairs of radially extending thread like projections circumferentially spaced around the lower end of the lock member and said tool holder having cooperating sets of triple thread like projections for wedgingly receiving the pairs of thread like projections on the lower end of the lock member.
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) | 1976-04-30 | 1976-10-30 | 1977-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-30 | 1980-10-30 | 1981-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-30 | 1984-10-30 | 1985-05-01 | $7700.00 | Window Closed / Lapsed |