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US3889333A
Expired / Lapsed
US
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Fast exchange clamping device for rotary tools
Assignee: Ledermann and Co
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Filing: 1974-04-22
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Granted: 1975-06-17
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Expires: 1994-04-22
Abstract
Abstract A fast exchange clamping device, or chuck, for rotary tools in which a support body adapted for connection to a spindle has a tool engaging surface perpendicular to the axis of rotation to engage one side of a rotary tool concentric with the axis. Clamping means in the form of bolt means extend perpendicularly from the tool engaging surface of the support body and includes head means releasably engageable with the side of a tool which faces away from the surface on the support body. The clamping means is moveable axially in the support body and is spring biased toward tool clamping position and is selectively moveable into tool releasing position.
Inventors
- 👤 Otto Katz
- 👤 Heinrich Tischinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:10
CPC Classifications
B; B27; B27B; B27B5/00; B27B5/29; B27B5/30; B27B5/32; B27B5/325; B27B33/00; B27B33/20; B27B5/34; Y; Y10; Y10T; Y10T407/00; Y10T407/19; Y10T407/1902; Y10T407/1906; Y10T407/1926; Y10T407/1934; Y10T407/1936; Y10T407/1938; Y10T407/194; Y10T407/1942; Y10T407/1944; Y10T83/00; Y10T83/929; Y10T83/9372; Y10T83/9377; Y10T83/9379
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
165 words
In a quick exchange chucking device for rotary tools; a support means having a central axis and adapted for being driven in rotation on said axis, said support means having a surface perpendicular to said axis for engaging a tool, clamping means on said support means protruding axially through said surface and axially moveable on said support means, said clamping means having clamp surface means thereon facing said surface on said support means whereby a tool disposed between said surface On said support means and said clamp surface means on said clamping means can be clamped to said support means by axial movement of said clamping means on said support means, spring means in said support means biasing said clamping means in tool clamping direction, means for moving said clamping means in tool releasing position, and cooperating elements of a disengageable connection on said tool and said clamping means to permit removal of the tool when said clamping means are moved into tool releasing position.
Claim 2
Dependent Claim
165 words
In a quick exchange chucking device for rotary tools; a support means having a central axis and adapted for being driven in rotation on said axis, said support means having a surface perpendicular to said axis for engaging a tool, clamping means on said support means protruding axially through said surface and axially moveable on said support means, said clamping means having clamp surface means thereon facing said surface on said support means whereby a tool disposed between said surface On said support means and said clamp surface means on said clamping means can be clamped to said support means by axial movement of said clamping means on said support means, spring means in said support means biasing said clamping means in tool clamping direction, means for moving said clamping means in tool releasing position, and cooperating elements of a disengageable connection on said tool and said clamping means to permit removal of the tool when said clamping means are moved into tool releasing position.
Claim 3
Dependent Claim
28 words
A device according to claim 1 in which the disengagement of the tool from the clamping means is accomplished by relative rotation of the tool and support means.
Claim 4
Dependent Claim
65 words
A device according to claim 1 in which said clamping means comprises a plurality of clamp members distributed in the peripheral direction of said support means and radially spaced from the axis thereof, each clamp member having a head on the outer end, said tool having circumferentially extending key hole slots therein with the larger ends adapted to receive the heads of said clamp members.
Claim 5
Dependent Claim
45 words
A device according to claim 3 in which said slots are formed directly in the tool, the head on each clamp member being tapered, the narrow portion of each slot at the closed end having a tapered seat to receive a respective clamp member head.
Claim 6
Dependent Claim
52 words
A device according to claim 1 in which said clamping means includes a further member separable from the clamping means and having said clamp surface means formed thereon, said support means and said further member having interengaging axial surfaces concentric with said axis to center the further member on said support means.
Claim 7
Dependent Claim
63 words
A device according to claim 1 in which said clamping means comprises a plurality of bolts extending perpendicularly into said support means through said surface and having tapered heads on the outer ends, said bolts being radially spaced from said axis and distributed circumferentially in said support means, and a spring acting on each bolt to move the head thereof toward said surface.
Claim 8
Dependent Claim
28 words
A device according to claim 6 in which said disengageable connection includes a slot for each bolt having a tapered countersink region for receiving a respective bolt head.
Claim 9
Dependent Claim
62 words
A device according to claim 6 which includes an actuating member in said support means for each bolt, said spring for each bolt engaging one side of the respective actuating member, means in the support means for engagement with the other side of each actuating member to move the bolts in releasing direction, and each bolt threadedly engaging the respective actuating member.
Claim 10
Dependent Claim
47 words
A device according to claim 8 which includes recesses formed in said support means for said actuating members, each recess having a bottom spaced from said surface on said support means, and bores in said support means through which said bolts are guided into the respective recesses.
Claim 11
Dependent Claim
47 words
A device according to claim 9 in which said support means comprises a main body part and an annular flange mounted in centered position thereon, said annular flange on one side forming said tool engaging surface and said recesses extending into said flange from the other side.
Claim 12
Dependent Claim
61 words
A device according to claim 10 in which each actuating member has a collar on the end remote from the bottom of the respective recess, each spring comprising a pocket of spring washers surrounding the respective actuating member and at one end engaging the bottom of the respective recess and at the other end engaging the collar of the actuating member.
Claim 13
Dependent Claim
29 words
A device according to claim 11 which includes release means engaging all of said actuating members and operable for moving all of said actuating members simultaneously in releasing direction.
Claim 14
Dependent Claim
52 words
A device according to claim 12 in which said release means comprises a rotary cam in said support means having a cam portion for each actuating member, and means operable from externally of said support means for rotating said cam to move said actuating members between toOl releasing and tool clamping positions.
Claim 15
Dependent Claim
29 words
A device according to claim 12 in which said release means comprises a fluid operable annular piston in said support means, said piston engaging all of said actuating members.
Claim 16
Dependent Claim
26 words
A device according to claim 1 in which said means for moving said clamping means in tool releasing direction comprises a cam in said support means.
Claim 17
Dependent Claim
28 words
A device according to claim 1 in which said means for moving said clamping means in tool releasing direction comprises a fluid operable piston in said support means.
Claim 18
Dependent Claim
57 words
A device according to claim 1 in which said support means comprises a hub portion having means for connection to a spindle, an annular flange connected to the hub portion and one side thereof forming said tool engaging surface, and a back plate centered on said hub portion and engaging the other side of said annular flange.
Claim 19
Dependent Claim
36 words
A device according to claim 3 which includes a tool in the form of circumferential segments, each segment engaging an adjacent pair of said clamp members and being supported and located on said support means thereby.
Claim 20
Dependent Claim
36 words
A device according to claim 1 in which said support means has a peripheral surface concentric with said axis, and tool means mounted on the peripheral surface of said support means and extending radially outwardly therefrom.
Claim 21
Dependent Claim
117 words
A device according to claim 1 in which said clamping means is a single bolt on the axis of said support means, a head on the outer end of said bolt, a clamp disc forming a part of said clamping means and having a radial slot for receiving the shank of said bolt and a countersink recess in the center to receive the head of the bolt, the side of said disc facing said support means forming said clamping surface, and a central flange protruding axially from said support means on which a tool is adapted to be mounted, said central flange being larger in diameter than the bolt head and smaller in diameter than said disc.
Claim 22
Dependent Claim
87 words
A device according to claim 1 in which said clamping means comprises a plurality of bolts extending perpendicularly into said support means through said surface and having heads on the outer ends, said bolts being radially spaced from said axis and distributed circumferentially in said support means, and a spring acting on each bolt to move the head thereof toward said surface, a further member releasably engaging said bolt heads, and a plurality of tools in stacked relation between said tool engaging surface and said further member.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-16 | 1978-12-16 | 1979-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-16 | 1982-12-16 | 1983-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-16 | 1986-12-16 | 1987-06-17 | $7700.00 | Window Closed / Lapsed |