US3659863A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic drill chuck and split collet
Assignee: Individual
•
Filing: 1969-10-07
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Granted: 1972-05-02
•
Expires: 1989-10-07
Abstract
Abstract A fluid operated chuck includes drive means having an annular groove formed therein. A fluid actuated collet engaging means engages an associated collet. A novel segmented collet includes a plurality of separate spaced portions having a tapered outer surface which cooperates with a tapered surface on the collet engaging means. Each of these collet portions has a radially outwardly extending flange at the inner end thereof which fits within the annular groove in the drive means for retaining the segmented collet in position. A generally cylindrical longitudinally split inner collet fits snugly within the segmented collet. A locating ring can also be disposed within the segmented collet, this locating ring having a central threaded hole formed therein. Pin means may also be provided between the collet portions for maintaining them in operative spaced relationship to one another. These pins can be carried by the drive means or the locating ring. A modified form of chuck includes a pair of pistons one of which is slidable upon the other, the pistons being movable in opposite directions to operate an associated collet. Fluid is introduced around the pistons to form a fluid bearing for the pistons and further to urge the pistons away from one another.
Inventors
- 👤 Horace J Buttner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:20
CPC Classifications
B; B23; B23B; B23B31/00; B23B31/02; B23B31/10; B23B31/12; B23B31/20; B23B31/201; B23B31/204; Y; Y10; Y10T; Y10T279/00; Y10T279/12; Y10T279/1241; Y10T279/1249; Y10T279/1266; Y10T279/17; Y10T279/17411; Y10T279/17487; Y10T279/17521
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
224 words
A fluid operated chuck comprising a housing, drive means mounted within said housing for rotation with respect thereto and adapted to be connected with a drive shaft, fluid actuated collet engaging means supported within said housing for engaging an associated collet, said fluid operated collet engaging means including first and second pistons axially movable in opposite directions, and means for introduciNg fluid into a space between said pistons, said first piston being tubular and having a first external substantially cylindrical surface providing a journal surface, said first piston having an annular extension of a diameter less than said first external surface, said first piston having a bore formed therethrough and including a tapered portion and a substantially cylindrical portion concentric to said first external surface, said second piston being tubular and slidably mounted on said annular extension, said second piston having a second external substantially cylindrical surface substantially similar to said first external surface to provide a journal surface whereby in combination said first and second external surfaces are adapted to journal the collet engaging means within the housing, said first piston being axially movable to engage the tapered portion of said bore with a mating surface on a collet, the substantially cylindrical portion of said bore being adapted to accurately radially position the full length of the cylindrical portion of an associated collet.
Claim 2
Dependent Claim
224 words
A fluid operated chuck comprising a housing, drive means mounted within said housing for rotation with respect thereto and adapted to be connected with a drive shaft, fluid actuated collet engaging means supported within said housing for engaging an associated collet, said fluid operated collet engaging means including first and second pistons axially movable in opposite directions, and means for introduciNg fluid into a space between said pistons, said first piston being tubular and having a first external substantially cylindrical surface providing a journal surface, said first piston having an annular extension of a diameter less than said first external surface, said first piston having a bore formed therethrough and including a tapered portion and a substantially cylindrical portion concentric to said first external surface, said second piston being tubular and slidably mounted on said annular extension, said second piston having a second external substantially cylindrical surface substantially similar to said first external surface to provide a journal surface whereby in combination said first and second external surfaces are adapted to journal the collet engaging means within the housing, said first piston being axially movable to engage the tapered portion of said bore with a mating surface on a collet, the substantially cylindrical portion of said bore being adapted to accurately radially position the full length of the cylindrical portion of an associated collet.
Claim 3
Dependent Claim
82 words
A fluid operated chuck comprising a housing, drive means mounted within said housing for rotation with respect thereto and adapted to be connected with a drive shaft, fluid actuated collet engaging means supported within said housing for engaging an associated collet, said fluid operated collet engaging means including first and second pistons movable in opposite directions, and means for introducing fluid between said pistons comprising means for introducing fluid around said pistons to provide a fluid bearing for each of said pistons.
Claim 4
Dependent Claim
82 words
A fluid operated chuck comprising a housing, drive means mounted within said housing for rotation with respect thereto and adapted to be connected with a drive shaft, fluid actuated collet engaging means supported within said housing for engaging an associated collet, said fluid operated collet engaging means including first and second pistons movable in opposite directions, and means for introducing fluid between said pistons comprising means for introducing fluid around said pistons to provide a fluid bearing for each of said pistons.
Claim 5
Dependent Claim
35 words
Apparatus as defined in claim 2 wherein the means for introducing fluid around said pistons comprises fluid inlet means substantially surrounding each piston and being disposed adjacent the medial portion of each of said pistons.
Claim 6
Dependent Claim
19 words
Apparatus as defined in claim 3 wherein said fluid inlet means comprise a plurality of individual substantially radial passages.
Claim 7
Dependent Claim
33 words
Apparatus as defined in claim 4 including an annular space disposed between the inner ends of said individual radial passages of each fluid inlet means and the outer periphery of the associated piston.
Claim 8
Dependent Claim
117 words
A fluid operated chuck comprising a housing, drive means mounted within said housing for rotation with respect thereto and adapted to be connected with a drive shaft, fluid actuated collet engaging means supported within said housing for engaging an associated collet, said fluid operated collet engaging means including first and second pistons movable in opposite directions, and means for introducing fluid between said pistons, said drive means including a space to receive collet portions, and a segmented collet including a plurality of separate spaced portions, each of said collet portions having on the inner end thereof a radially outwardly extending portion received within said space in the drive means for retaining the collet portions in operative position.
Claim 9
Dependent Claim
117 words
A fluid operated chuck comprising a housing, drive means mounted within said housing for rotation with respect thereto and adapted to be connected with a drive shaft, fluid actuated collet engaging means supported within said housing for engaging an associated collet, said fluid operated collet engaging means including first and second pistons movable in opposite directions, and means for introducing fluid between said pistons, said drive means including a space to receive collet portions, and a segmented collet including a plurality of separate spaced portions, each of said collet portions having on the inner end thereof a radially outwardly extending portion received within said space in the drive means for retaining the collet portions in operative position.
Claim 10
Dependent Claim
47 words
Apparatus as defined in claim 6 wherein the space in the drive means comprises an annular groove defining a load reaction shoulder, the radially outwardly extending portion on each of said collet portions comprising a radially outwardly extending flange defining a shoulder engaging said load reaction shoulder.
Claim 11
Dependent Claim
201 words
In combination, a motor having an output spindle, a fluid operated chuck including a fluid actuated piston supported for axial movement toward and away from said spindle for engaging an associated collet, and means for introducing fluid into a space between said spindle and said piston for actuating said piston, said piston being tubular and having a first external substantially cylindrical surface providing a journal surface, said piston having a bore formed therethrough and including a tapered portion and a substantially cylindrical portion concentric to said first external surface, said piston having an annular extension of a diameter less than said first external surface, said spindle having a bore formed therein sliDably receiving said annular extension, said spindle having a second external substantially cylindrical surface substantially similar to said first external surface to provide a journal surface, whereby in combination said first and second external surfaces are adapted to journal the spindle and piston within a housing, said piston being axially movable to engage the tapered portion of said bore with a mating surface on a collet, the substantially cylindrical portion of said bore being adapted to accurately radially position the full length of the cylindrical portion of an associated collet.
Claim 12
Dependent Claim
201 words
In combination, a motor having an output spindle, a fluid operated chuck including a fluid actuated piston supported for axial movement toward and away from said spindle for engaging an associated collet, and means for introducing fluid into a space between said spindle and said piston for actuating said piston, said piston being tubular and having a first external substantially cylindrical surface providing a journal surface, said piston having a bore formed therethrough and including a tapered portion and a substantially cylindrical portion concentric to said first external surface, said piston having an annular extension of a diameter less than said first external surface, said spindle having a bore formed therein sliDably receiving said annular extension, said spindle having a second external substantially cylindrical surface substantially similar to said first external surface to provide a journal surface, whereby in combination said first and second external surfaces are adapted to journal the spindle and piston within a housing, said piston being axially movable to engage the tapered portion of said bore with a mating surface on a collet, the substantially cylindrical portion of said bore being adapted to accurately radially position the full length of the cylindrical portion of an associated collet.
Claim 13
Dependent Claim
35 words
Apparatus as defined in claim 8 wherein said means for introducing fluid between said spindle and said piston comprises means for introducing fluid around said spindle and said piston to provide a fluid bearing therefor.
Claim 14
Dependent Claim
17 words
Apparatus as defined in claim 9 wherein said piston includes a portion slidably supported by said spindle.
Claim 15
Dependent Claim
25 words
Apparatus as defined in claim 10 wherein said portion of the piston is tubular and is slidably received within a bore formed in said spindle.
Claim 16
Dependent Claim
29 words
Apparatus as defined in claim 9 wherein the means for introducing fluid around said spindle and said piston comprises fluid inlet means substantially surrounding said spindle and said piston.
Claim 17
Dependent Claim
19 words
Apparatus as defined in claim 12 wherein said fluid inlet means comprise a plurality of individual substantially radial passages.
Claim 18
Dependent Claim
33 words
Apparatus as defined in claim 13 including an annular space disposed between the inner ends of said individual radial passages of each fluid inlet means and the outer periphery of the adjacent component.
Claim 19
Dependent Claim
64 words
Apparatus as defined in claim 8 wherein said spindle has a bore formed therein and defines a space for receiving collet portions, a segmented collet including a plurality of separate spaced portions, each of said collet portions having on the inner end thereof a radially outwardly extending portion received within said space in the drive spindle for retaining the collet portions in operative position.
Claim 20
Dependent Claim
44 words
Apparatus as defined in claim 15 wherein the space in said spindle comprises an annular groove defining a load reaction shoulder, the radially outwardly extending portion of said collet portions comprising a radially outwardly extending flange defining a shoulder engaging said load reaction shoulder.
Claim 21
Dependent Claim
30 words
Apparatus as defined in claim 1, including means for providing hydrostatic bearing means for said journal surfaces, said hydrostatic bearing means including a plurality of individual, substantially radial metering passages.
Claim 22
Dependent Claim
25 words
Apparatus as defined in claim 17 including an annular space disposed between the inner ends of said individual radial passages and the associated journal surfaces.
Claim 23
Dependent Claim
34 words
Apparatus as defined in claim 17 wherein said means for introducing fluid between said pistons includes additional metering passages disposed between said first-mentioned passages and being in communication with the space between said pistons.
Claim 24
Dependent Claim
22 words
Apparatus as defined in claim 17 wherein said metering passages are disposed adjacent the medial portion of each of said journal surfaces.
Claim 25
Dependent Claim
30 words
Apparatus as defined in claim 8, including means for providing hydrostatic bearing means for said journal surfaces, said hydrostatic bearing means including a plurality of individual, substantially radial metering passages.
Claim 26
Dependent Claim
25 words
Apparatus as defined in claim 21 including an annular space disposed between the inner ends of said individual radial passages and the associated journal surfaces.
Claim 27
Dependent Claim
34 words
Apparatus as defined in claim 21 wherein said means for introducing fluid between said pistons includes additional metering passages disposed between said first-mentioned passages and being in communication with the space between said pistons.
Claim 28
Dependent Claim
22 words
Apparatus as defined in claim 21 wherein said metering passages are disposed adjacent the medial portion of each of said journal surfaces.
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) | 1975-05-02 | 1975-11-01 | 1976-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-02 | 1979-11-01 | 1980-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-02 | 1983-11-01 | 1984-05-02 | $7700.00 | Window Closed / Lapsed |