US3797956A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machine tool holder and driving means
Assignee: Individual
•
Filing: 1972-12-15
•
Granted: 1974-03-19
•
Expires: 1992-12-15
Abstract
Abstract A machine tool holder and driving means for holding various tools such as drills, taps, milling cutters, etc., wherein a tool holder carries such a tool and is readily and easily removably connected to a driving spindle mechanism whereby several tools may be successively used and changed rapidly relative to said spindle mechanism; the tool holder having separate concentric means removably engageable with cooperative and conforming areas on the spindle mechanism for maintaining accurate concentric and axial alignment of the tool holder with the spindle, the said concentric means being disengageably held in accurate connection by a power operated draw bar in the spindle mechanism and spring loaded shear pin mechanism intermeshes between the tool holder and spindle to provide driving torque resistance; the said concentric means being devoid of conventional locking taper structure so as to be freely and accurately engageable and disengageable.
Inventors
- 👤 W Breitkopk
- 👤 J Bayer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:29
CPC Classifications
B; B23; B23B; B23B31/00; B23B31/02; B23B31/24; B23B31/26; Y; Y10; Y10T; Y10T408/00; Y10T408/36; Y10T408/37; Y10T409/00; Y10T409/30; Y10T409/309352; Y10T409/309408; Y10T409/309464
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
446 words
In a machine tool holder and driving means, the combination of: a frame; a tool driving spindle axially reciprocably and rotatably mounted relative to said frame; a power operated draw bar reciprocally mounted concentrically in said spindle; said spindle having a tool holder engaging end; said end having a collet receiving converging bore which converges away from said end and into said spindle; a radially expandable collet in said converging bore; said collet coupled to said draw bar; said collet having fingers tending resiliently to deflect radially outward toward said bore and to move apart when said draw bar is actuated reciprocably toward said tool holder engaging end of said spindle; a tool holder having a chuck adapted to hold a drill or other tool therein; said tool holder having a collet engaging stub provided with a peripherally disposed annular ledge; said collet fingers having inwardly directed ledges adapted to engage said annular ledge of said tool holder when said collet is retracted into said converging bore to force said fingers radially inward; said fingers of said collet when engaged with said annular ledge on said stub of said tool holder adapted to draw said tool holder toward and into engagement with said tool holder engaging end of said spindle in response to operation of said draw bar in a direction away from said last mentioned end; said tool holder and said spindle having concentric close tolerance annular axially meshing portions; said annular meshing portions adapted to attain precise concentricity of said tool holder relative to said spindle and to fix said tool holder and spindle precisely on a common axis of rotation; said tool holder and said spindle having respective first and second annular planes normally abutted with each other and held together by force of said draw bar retracting said stub of said tool holder in a direction away from said tool holder engaging end of said spindle; said annular planes precisely disposed at right angles to said common axis of rotation of said tool holder and spindle; said spindle constituting a driving member; said tool holder constituting a driven member; one of said members having a generally annular row of recesses therein; said row concentric to said common axis of rotation; the other of said members carrying a generally annular row of spring loaded projectible means; said generally annular row of projectible means being disposed on a common radius with said recesses and concentric about said common axis of rotation; one of said members having openings therein; said projectible means reciprocably movable in said openings and being spring loaded to move reciprocably partially out of said openings and to engage in said recesses.
Claim 2
Dependent Claim
446 words
In a machine tool holder and driving means, the combination of: a frame; a tool driving spindle axially reciprocably and rotatably mounted relative to said frame; a power operated draw bar reciprocally mounted concentrically in said spindle; said spindle having a tool holder engaging end; said end having a collet receiving converging bore which converges away from said end and into said spindle; a radially expandable collet in said converging bore; said collet coupled to said draw bar; said collet having fingers tending resiliently to deflect radially outward toward said bore and to move apart when said draw bar is actuated reciprocably toward said tool holder engaging end of said spindle; a tool holder having a chuck adapted to hold a drill or other tool therein; said tool holder having a collet engaging stub provided with a peripherally disposed annular ledge; said collet fingers having inwardly directed ledges adapted to engage said annular ledge of said tool holder when said collet is retracted into said converging bore to force said fingers radially inward; said fingers of said collet when engaged with said annular ledge on said stub of said tool holder adapted to draw said tool holder toward and into engagement with said tool holder engaging end of said spindle in response to operation of said draw bar in a direction away from said last mentioned end; said tool holder and said spindle having concentric close tolerance annular axially meshing portions; said annular meshing portions adapted to attain precise concentricity of said tool holder relative to said spindle and to fix said tool holder and spindle precisely on a common axis of rotation; said tool holder and said spindle having respective first and second annular planes normally abutted with each other and held together by force of said draw bar retracting said stub of said tool holder in a direction away from said tool holder engaging end of said spindle; said annular planes precisely disposed at right angles to said common axis of rotation of said tool holder and spindle; said spindle constituting a driving member; said tool holder constituting a driven member; one of said members having a generally annular row of recesses therein; said row concentric to said common axis of rotation; the other of said members carrying a generally annular row of spring loaded projectible means; said generally annular row of projectible means being disposed on a common radius with said recesses and concentric about said common axis of rotation; one of said members having openings therein; said projectible means reciprocably movable in said openings and being spring loaded to move reciprocably partially out of said openings and to engage in said recesses.
Claim 3
Dependent Claim
79 words
The invention as defined in claim 1, wherein: said projectible means comprise pins having tapered ends; the number of said projectible means in said respective annular row different than the number of said recesses in the respective annular row whereby at least one of said pins may readily be aligned and engage in one of said recesses when said draw bar draws said annular plane of said tool holder into engagement with the respective annular plane of said spindle.
Claim 4
Dependent Claim
166 words
The invention as defined in claim 1, wherein: a rotatable turret plate is carried by said frame and rotatable on an axis offset from and parallel to said common axis; said turret plate having an annular row of tool holder receiving openings therein; said tool holder receiving openings being disposed to rotate into alignment with said spindle; one of said tool holders being reciprocably held in a respective one of said tool holder receiver openings; resiliently yieldable detent means for holding said tool holder therein, whereby said spindle may engage said tool holder and force it axially out of the respective tool holder receiving opening and toward work to be machined by a drill or other tool held in said chuck of said tool holder; and a table for holding work to be machined in juxtaposition relative to said frame and spaced from said turret plate to allow clearance thereof as said plate is successfully rotated to dispose various tool holders in alignment with said spindle.
Claim 5
Dependent Claim
64 words
The invention as defined in claim 1, wherein: said annular axially meshing portions of said tool holder anD spindle are constituted by a close tolerance cylindrical bore portion of said spindle concentric with said common axis and disposed at the diverging end of said converging bore; said stub of said tool holder having an annular external shoulder closely engageable with said cylindrical bore portion.
Claim 6
Dependent Claim
81 words
The invention as defined in claim 1, wherein: said spindle is provided with a hollow housing reciprocably mounted on said frame; a hollow power driven shaft rotatably mounted and axially restrained in said housing; said shaft being hollow; said draw bar being mounted in said hollow shaft and axially reciprocable therein; and a power operated actuator carried by said shaft for reciprocably moving said draw bar in said hollow shaft; and a rotary coupling on said actuator for transmitting power thereto.
Claim 7
Dependent Claim
53 words
The invention as defined in claim 5, wherein: an elongated rectilinear guide is disposed on said frame; said guide disposed for guiding said coupling to prevent it from rotating with said shaft and actuator; and to allow said coupling to move along said guide as said housing reciprocates longitudinally along said common axis.
Claim 8
Dependent Claim
24 words
The invention as defined in claim 5, wherein: said actuator is a pressure fluid actuator having a movable member coupled to said draw bar.
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) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |