US3917422A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for centering a rotary tool body on a drive shaft
Assignee: Michael Weinig AG
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Filing: 1974-08-02
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Granted: 1975-11-04
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Expires: 1994-08-02
Abstract
Abstract A rotary tool body has a central bore for receiving a support and drive shaft. At least one sleeve in the central bore surrounding the shaft is sealed at the ends in the bore and between the sealed ends includes at least one radially deformable axial region. Passages in the tool body provide for the supply of flowable pressure medium to the central bore around the deformable axial region to deform the axial region radially into engagement with the shaft and for the release of the pressure medium from the central bore.
Inventors
- 👤 Otto Betzler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:54
CPC Classifications
B; B23; B23Q; B23Q1/00; B23Q1/25; B23Q1/26; B23Q1/28; B23Q1/287; Y; Y10; Y10T; Y10T403/00; Y10T403/16; Y10T403/1633; Y10T83/00; Y10T83/929; Y10T83/9372; Y10T83/9377
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
117 words
A rotary tool member, especially for wood working machines, and adapted for mounting on a drive shaft; said tool member comprising a body having a central bore therethrough, sleeve means in said bore having an internal axial hole of uniform diameter for receiving the shaft, said sleeve means having axially spaced regions of sealing engagement with the bore in the body to define with the bore an annular chamber, said sleeve means comprising at least one radially deformable axial portion between said spaced regions, and means connected to said chamber for supplying a flowable pressure medium to said chamber thereby to deform said axial portion radially inwardly into pressure engagement with the shaft in the sleeve means.
Claim 2
Dependent Claim
117 words
A rotary tool member, especially for wood working machines, and adapted for mounting on a drive shaft; said tool member comprising a body having a central bore therethrough, sleeve means in said bore having an internal axial hole of uniform diameter for receiving the shaft, said sleeve means having axially spaced regions of sealing engagement with the bore in the body to define with the bore an annular chamber, said sleeve means comprising at least one radially deformable axial portion between said spaced regions, and means connected to said chamber for supplying a flowable pressure medium to said chamber thereby to deform said axial portion radially inwardly into pressure engagement with the shaft in the sleeve means.
Claim 3
Dependent Claim
17 words
A rotary tool member according to claim 1 in which said flowable pressure medium is fiscose grease.
Claim 4
Dependent Claim
57 words
A rotary tool member according to claim 1 in which said means connected to said chamber comprises a passage leading to said chamber through said body and including a check valve therein opening toward said chamber, said check valve adapted for connection to a high pressure lubricating device for supplying grease under high pressure to said chamber.
Claim 5
Dependent Claim
33 words
A rotary tool member according to claim 3 in which said check valve is a grease fitting having an inlet end near a surface of said body for engagement by said lubricating device.
Claim 6
Dependent Claim
57 words
A rotary tool member according to claim 1 in which said means connected to said chamber comprises a first bore in said body leading to said chamber and having a check valve therein opening toward said chamber, and a second bore in said body leading away from said chamber and having a selectively operable closure valve therein.
Claim 7
Dependent Claim
40 words
A rotary tool member according to claim 5 in which said closure valve comprises a ball, a seat in said second bore engageable by said ball, and a screw threaded into the body to press said ball toward said seat.
Claim 8
Dependent Claim
30 words
A rotary tool member according to claim 6 which includes an exhaust passage leading to the atmosphere from the side of said closure valve which faces away from said chamber.
Claim 9
Dependent Claim
24 words
A rotary tool member according to claim 5 in which said first and second bores are substantially diametrally opposed in respect of said chamber.
Claim 10
Dependent Claim
55 words
A rotary tool member according to claim 1 in which said sleeve means comprises a said radially deformable axial portion adjacent each said region of sealing engagement, each axial portion of the sleeve means being formed by a reduction in the radial thickness of the wall of the sleeve means along the respective axial portion.
Claim 11
Dependent Claim
36 words
A rotary tool member according to claim 9 in which said sleeve means comprising an axial section between said axial portions wherein the wall of said sleeve means is radially thicker than along said axial portions.
Claim 12
Dependent Claim
36 words
A rotary tool member according to claim 12 in which the difference in wall thickness of said axial portions and the axial section therebetween is formed into said sleeve means on the radially outer side thereof.
Claim 13
Dependent Claim
50 words
A rotary tool member according to claim 1 in which said sleeve means comprises a pair of sleeves in axially spaced relation in the bore in said body and each sleeve including a radially deformable axial portion and defining with said bore a closed chamber surrounding the respective axial portion.
Claim 14
Dependent Claim
39 words
A rotary tool member according to claim 12 which includes first means common to said chambers for supplying a high pressure flowable medium thereto and second means also common to said chambers for releasing the high pressure medium therefrom.
Claim 15
Dependent Claim
37 words
A rotary tool member according to claim 12 which includes first means for each said chamber for supplying a high pressure flowable medium thereto and second means for each chamber for releasing the high pressure medium therefrom.
Claim 16
Dependent Claim
50 words
A rotary tool member according to claim 12 in which said second means includes an axial bore in said body, and radial bores in the body leading from the respective chambers to said axial bore, and at least one selectively operable closure valve connecting said axial bore to the atmosphere.
Claim 17
Dependent Claim
32 words
A rotary tool member according to claim 1 which includes drive means on the shaft at the ends of the said body for transmitting driving power from the shaft to the body.
Claim 18
Dependent Claim
63 words
A rotary tool member according to claim 12 in which said sleeves are inserted in the central bore in the body at the opposite ends of the bore, each sleeve having a radial flange at the axially outer end larger in diameter than said central bore, said flanges adapted for engagement by clamping members on the shaft at opposite ends of said body.
Claim 19
Dependent Claim
58 words
A rotary tool member according to claim 12 in which said spaced regions of each sleeve comprise enlarged diameter portions formed on the sleeve near the opposite ends and closely receivable in said central bore, annular grooves in said enlarged diameter portions, and sealing rings mounted in said grooves and sealingly engaging the inside of said central bore.
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) | 1978-11-03 | 1979-05-05 | 1979-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-03 | 1983-05-05 | 1983-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-03 | 1987-05-05 | 1987-11-04 | $7700.00 | Window Closed / Lapsed |