US3913192A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for clamping a thin-walled tool spindle sleeve
Assignee: Friedrich Deckel AG
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Filing: 1973-07-24
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Granted: 1975-10-21
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Expires: 1993-07-24
Abstract
Abstract Device for clamping an axially feedable thin-walled tool spindle sleeve. A thin-walled tool spindle sleeve is received within an appropriate opening in a support housing and in turn internally supports bearings on which the tool spindle is guided and rotates. Means are provided for permitting when unclamped the sleeve to move axially of the spindle and when clamped to hold the sleeve against such axial movement. Said means include a longitudinally aligned slot opening exteriorly of the sleeve and clamping means received within said slot for clamping same and further means threadedly related to the casing for moving the clamping means radially inwardly or outwardly as desired to clamp or unclamp said sleeve. Said clamping means in certain embodiments are pulled snugly against the sides of the slot for resisting longitudinal movement of the sleeve with respect to the housing and in all embodiments spread circumferentially the sides of said slot to cause the surfaces of sleeve adjacent thereto to bear engagingly against the surface of the housing surrounding same, particularly in the region of the slot. In one embodiment a groove having a dovetail cross section receives a correspondingly shaped clamp and same is actuated by pulling said clamp radially outwardly of said sleeve. In another embodiment a spreading device moves radially outwardly of said sleeve and thereby through intermediate means effects opposite circumferential pressure onto parallel walls of the slot for effecting a distortion of the sleeve sufficient to cause same to bear tightly against the housing walls surrounding same.
Inventors
- 👤 Michael Baumer
- 👤 Ludwig Baumgartner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:28
CPC Classifications
B; B23; B23Q; B23Q1/00; B23Q1/25; B23Q1/26; B23Q1/28; F; F16; F16B; F16B2200/00; F16B2200/30; Y; Y10; Y10T; Y10T403/00; Y10T403/32; Y10T403/32254; Y10T403/32426; Y10T403/70; Y10T403/7075; Y10T403/7077; Y10T408/00; Y10T408/91; Y10T409/00; Y10T409/30; Y10T409/309352
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
277 words
A clamping device, comprising: a stationary spindle housing having an opening therethrough; an axially movable, thin-walled tool spindle sleeve mounted for axial movement relative to said opening, said opening having a close tolerance fit around said tool spindle sleeve; means defining at least one axially extending elongated groove on the periphery of said tool spindle sleeve, said groove having at least a pair of substantially circumferentially facing, separate and opposed side surfaces, said tool spindle sleeve being made of a radially expansible material facilitating a slight amount of radial expansion upon application of a circumferential force to said circumferentially facing side surfaces of said groove; means defining at least one shoe received in said elongated groove, said shoe having a pair of oppositely facing side surfaces both having a contour corresponding to the contour of said circumferentially facing side surfaces and acting to simultaneously frictionally engage said pair of opposed and separate side surfaces of said groove; and adjusting means for moving said oppositely facing side surfaces of said shoe into and out of frictional engagement with said opposed side surfaces of said groove to effect said slight radial expansion of said tool spindle sleeve, said frictional engagement being caused by a component of force acting at least in a circumferential direction relative to said tool spindle sleeve whereby said tool spindle sleeve is maintained in a fixed position within said opening by a combination of the frictional engagement between said side surfaces of said groove and said shoe and the frictional engagement between the outer diameter of said tool spindle sleeve and the internal surface of said opening after radial expansion of said tool spindle sleeve.
Claim 2
Dependent Claim
277 words
A clamping device, comprising: a stationary spindle housing having an opening therethrough; an axially movable, thin-walled tool spindle sleeve mounted for axial movement relative to said opening, said opening having a close tolerance fit around said tool spindle sleeve; means defining at least one axially extending elongated groove on the periphery of said tool spindle sleeve, said groove having at least a pair of substantially circumferentially facing, separate and opposed side surfaces, said tool spindle sleeve being made of a radially expansible material facilitating a slight amount of radial expansion upon application of a circumferential force to said circumferentially facing side surfaces of said groove; means defining at least one shoe received in said elongated groove, said shoe having a pair of oppositely facing side surfaces both having a contour corresponding to the contour of said circumferentially facing side surfaces and acting to simultaneously frictionally engage said pair of opposed and separate side surfaces of said groove; and adjusting means for moving said oppositely facing side surfaces of said shoe into and out of frictional engagement with said opposed side surfaces of said groove to effect said slight radial expansion of said tool spindle sleeve, said frictional engagement being caused by a component of force acting at least in a circumferential direction relative to said tool spindle sleeve whereby said tool spindle sleeve is maintained in a fixed position within said opening by a combination of the frictional engagement between said side surfaces of said groove and said shoe and the frictional engagement between the outer diameter of said tool spindle sleeve and the internal surface of said opening after radial expansion of said tool spindle sleeve.
Claim 3
Dependent Claim
49 words
The device according to claim 1, including a plurality of longitudinal grooves which are equally spaced from each other on the periphery of said tool spindle sleeve, eacH groove having shoe means mounted therein and adjusting means for controlling the relative movement between said shoe means and said groove.
Claim 4
Dependent Claim
44 words
The device according to claim 1, wherein a plurality of shoe means are received in said longitudinal groove; and wherein a plurality of adjusting means are provided to effect said frictional engagement of each of said shoe means with said surfaces of said groove.
Claim 5
Dependent Claim
55 words
The device according to claim 1, wherein said longitudinal groove is constructed as a dovetail-shaped groove which diverges radially inwardly; and wherein the correspondingly formed shoe is pulled radially outwardly by said adjusting means to effect said frictional engagement between the internal surface of said opening and the outer surface of said tool spindle sleeve.
Claim 6
Dependent Claim
52 words
The device according to claim 1, wherein said longitudinal groove is constructed as a rectangular groove; and wherein the correspondingly formed shoe is a split shoe having a pair of circumferentially movable surfaces, said split shoe being expandable in a circumferential direction into engagement with said side surfaces of said longitudinal groove.
Claim 7
Dependent Claim
36 words
The device according to claim 1, wherein said groove is comprised of discontinuous surface means, the angle between each of said separate side surfaces and a bottom wall being in the range of 0* to 90*.
Claim 8
Dependent Claim
301 words
A clamping device, comprising: a stationary spindle housing having an opening therethrough; an axially movable, thin-walled tool spindle sleeve mounted for axial movement relative to said opening, said opening having a close tolerance fit around said tool spindle sleeve; means defining at least one axially extending elongated groove on the periphery of said tool spindle sleeve, said groove having at least a pair of substantially circumferentially facing and opposed side surfaces, said tool spindle sleeve being made of a radially expansible material facilitating a slight amount of radial expansion upon application of a circumferential force to said circumferentially facing side surfaces of said groove; means defining at least one shoe received in said elongated groove, said shoe having a pair of substantially circumferentially and oppositely facing side surfaces, both of said side surfaces of said shoe having a contour corresponding to the contour of said circumferentially facing side surfaces of said groove and being opposed to one of said side surfaces of said groove and further being adapted to simultaneously frictionally engage said pair of opposed side surfaces of said groove; and adjusting means for moving said oppositely facing side surfaces of said shoe into and out of frictional engagement with said opposed side surfaces of said groove to effect said slight radial expansion of said tool spindle sleeve, said frictional engagement being caused by a component of force acting at least in a circumferential direction relative to said tool spindle sleeve whereby said tool spindle sleeve is maintained in a fixed position within said opening by a combination of the frictional engagement between said side surface of said groove and said shoe and the frictional engagement between the outer diameter of said tool spindle sleeve and the internal surface of said opening after radial expansion of said tool spindle sleeve.
Claim 9
Dependent Claim
301 words
A clamping device, comprising: a stationary spindle housing having an opening therethrough; an axially movable, thin-walled tool spindle sleeve mounted for axial movement relative to said opening, said opening having a close tolerance fit around said tool spindle sleeve; means defining at least one axially extending elongated groove on the periphery of said tool spindle sleeve, said groove having at least a pair of substantially circumferentially facing and opposed side surfaces, said tool spindle sleeve being made of a radially expansible material facilitating a slight amount of radial expansion upon application of a circumferential force to said circumferentially facing side surfaces of said groove; means defining at least one shoe received in said elongated groove, said shoe having a pair of substantially circumferentially and oppositely facing side surfaces, both of said side surfaces of said shoe having a contour corresponding to the contour of said circumferentially facing side surfaces of said groove and being opposed to one of said side surfaces of said groove and further being adapted to simultaneously frictionally engage said pair of opposed side surfaces of said groove; and adjusting means for moving said oppositely facing side surfaces of said shoe into and out of frictional engagement with said opposed side surfaces of said groove to effect said slight radial expansion of said tool spindle sleeve, said frictional engagement being caused by a component of force acting at least in a circumferential direction relative to said tool spindle sleeve whereby said tool spindle sleeve is maintained in a fixed position within said opening by a combination of the frictional engagement between said side surface of said groove and said shoe and the frictional engagement between the outer diameter of said tool spindle sleeve and the internal surface of said opening after radial expansion of said tool spindle sleeve.
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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) | 1978-10-20 | 1979-04-21 | 1979-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-20 | 1983-04-21 | 1983-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-20 | 1987-04-21 | 1987-10-21 | $7700.00 | Window Closed / Lapsed |