US3703846A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machine tool spindle and drive
Assignee: Individual
•
Filing: 1970-11-16
•
Granted: 1972-11-28
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Expires: 1990-11-16
Abstract
Abstract A machine tool includes a housing having a drive spindle rotatably supported therein by bearing means including a lower bearing and an intermediate bearing. The spindle is provided with a tool holder or chuck projecting outwardly at the housing and a labyrinth type seal cooperates with a removable cap to effectively seal the lower portion at the housing. An armature shaft is supported at its lower end on the intermediate bearing and is removably connected to said spindle by a threaded bore and stud arrangement to provide an effectively balanced shaft and spindle assembly. The armature is easily replaced and assembled through the upper end of the housing which has removably connected thereto a cap which supports a third bearing rotatably supporting the upper end of the armature shaft.
Inventors
- 👤 Lewis E Krafft
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:10
CPC Classifications
B; B23; B23Q; B23Q1/00; B23Q1/70; Y; Y10; Y10T; Y10T408/00; Y10T408/65; Y10T409/00; Y10T409/30; Y10T409/309352; Y10T409/309408
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
293 words
A machine tool comprising: a cylindrical housing open at opposite axially first and second ends, a drive spindle within said housing and having at one end thereof a tool holder means connected thereto adjacent said first end of said housing, means rotatably supporting one end of said spindle adjacent said first end including a bearing retainer having an inner bearing supporting surface, first bearing means carrieD on said surface and rotatably connected to said first spindle end, a bearing cap removably connected to said bearing means adjacent said first end, said cap having a bore co-axial with said spindle and said tool holder means being rotatably disposed relative to said bore, an armature shaft in said housing having first and second ends and said armature shaft first end being in co-axial end-to-end alignment at a common juncture with said spindle, coupling means including a common intermediate bearing structure disposed in said housing intermediate said first and second housing ends and rotatably engaging and supporting the other end of said spindle and the first end of the shaft at their common juncture and forming an overlapping joint between the other end of said spindle and the first end of the shaft at the common juncture to prevent trans-axial misalignment of the ends of the spindle and shaft at their common juncture, an armature support cap removably connected to said housing over said housing second end, said armature support cap having a bearing unit carried therein and rotatably connected to the second end of said armature shaft, and said coupling means including at the common juncture means releasably drivingly connecting the first end of said armature shaft to the other end of said spindle where upon rotation of said shaft said spindle is driven thereby.
Claim 2
Dependent Claim
293 words
A machine tool comprising: a cylindrical housing open at opposite axially first and second ends, a drive spindle within said housing and having at one end thereof a tool holder means connected thereto adjacent said first end of said housing, means rotatably supporting one end of said spindle adjacent said first end including a bearing retainer having an inner bearing supporting surface, first bearing means carrieD on said surface and rotatably connected to said first spindle end, a bearing cap removably connected to said bearing means adjacent said first end, said cap having a bore co-axial with said spindle and said tool holder means being rotatably disposed relative to said bore, an armature shaft in said housing having first and second ends and said armature shaft first end being in co-axial end-to-end alignment at a common juncture with said spindle, coupling means including a common intermediate bearing structure disposed in said housing intermediate said first and second housing ends and rotatably engaging and supporting the other end of said spindle and the first end of the shaft at their common juncture and forming an overlapping joint between the other end of said spindle and the first end of the shaft at the common juncture to prevent trans-axial misalignment of the ends of the spindle and shaft at their common juncture, an armature support cap removably connected to said housing over said housing second end, said armature support cap having a bearing unit carried therein and rotatably connected to the second end of said armature shaft, and said coupling means including at the common juncture means releasably drivingly connecting the first end of said armature shaft to the other end of said spindle where upon rotation of said shaft said spindle is driven thereby.
Claim 3
Dependent Claim
23 words
The invention in accordance with claim 1, said means releasably connecting said ends of said spindle and shaft including a threaded connection therebetween.
Claim 4
Dependent Claim
41 words
The invention in accordance with claim 1, said means releasably connecting said ends of said spindle and shaft including a threaded stud projecting from one end and a threaded bore in said other end in which said threaded stud is secured.
Claim 5
Dependent Claim
20 words
The invention in accordance with claim 3, said other end of said armature shaft being supported on said bearing structure.
Claim 6
Dependent Claim
25 words
The invention in accordance with claim 2, other end of said armature shaft having a reduced end portion providing a shoulder engaging said bearing structure.
Claim 7
Dependent Claim
53 words
The invention in accordance with claim 1, said housing including a first hollow cylindrical portion in which said armature and shaft assembly is positioned, and a second hollow cylindrical portion of smaller inner diameter removably connected to said first portion, and in which said bearing structure, spindle, and first bearing means are positioned.
Claim 8
Dependent Claim
92 words
The invention in accordance with claim 1, including sealing means disposed between said first bearing means and said cap, said means including a seal disc having an annular inner peripheral surface engaging said first end of said spindle, said cap having an annular undercut recess co-axial with said cap and said disc having a radially extending face provided with an annular undercut recess to provide portions disposed in and complemental to said undercut recess of said cap thereby effecting a labyrinth type of sealing configuration at the first end of said housing.
Claim 9
Dependent Claim
39 words
The invention in accordance with claim 7, said first end of said spindle including a spindle portion disposed in the bore of said cap and including a radially extending face portion engaging said radially extending face of said disc.
Claim 10
Dependent Claim
27 words
The invention in accordance with claim 8, said tool holder including a collet and nut assembly connected to said first portion and projecting outwardly from said bore.
Claim 11
Dependent Claim
36 words
The invention in accordance with claim 9, said one spindle end having a threaded portion and a nut on said threaded portion engaging said first bearing means and removably clamping said disc against said spindle portion.
Claim 12
Dependent Claim
19 words
The invention in accordance with claim 1, said armature support cap having an opening co-axial with said bearing unit.
Claim 13
Dependent Claim
25 words
The invention in accordance with claim 1, said second end of said spindle and said other end of said armature shaft being relatively axially spaced.
Claim 14
Dependent Claim
42 words
The invention in accordance with claim 1, said means releasably connEcting said ends of said spindle and shaft including a threaded connection therebetween, and said second end of said spindle and said other end of said armature shaft being relatively axially spaced.
Claim 15
Dependent Claim
230 words
A machine tool comprising: a housing open at opposite axially first and second ends, a drive spindle within said housing and having at one end thereof a tool holder means connected thereto adjacent said first end of the housing, means rotatably supporting said one end of the spindle including a spindle supporting bearing in said housing, an armature shaft in said housing having first and second ends and said armature shaft first end being in co-axial end-to-end alignment at a common juncture with the other end of said spindle, coupling means including a common intermediate bearing disposed in said housing intermediate the first and second housing ends and rotatably engaging and supporting the other end of said spindle and the first end of the shaft at their common juncture and forming an overlapping joint between the other end of the spindle and the first end of the shaft at their common juncture prevent trans-axial misalignment of the ends of the spindle and the shaft at their common juncture, an armature shaft bearing carried at the second end of the housing and rotatably supported and connected to the second end of the armature shaft, said coupling means at the common juncture including means releasably drivingly connecting the first end of the armature shaft to the other end of said spindle where upon rotation of said shaft said spindle is driven thereby.
Claim 16
Dependent Claim
230 words
A machine tool comprising: a housing open at opposite axially first and second ends, a drive spindle within said housing and having at one end thereof a tool holder means connected thereto adjacent said first end of the housing, means rotatably supporting said one end of the spindle including a spindle supporting bearing in said housing, an armature shaft in said housing having first and second ends and said armature shaft first end being in co-axial end-to-end alignment at a common juncture with the other end of said spindle, coupling means including a common intermediate bearing disposed in said housing intermediate the first and second housing ends and rotatably engaging and supporting the other end of said spindle and the first end of the shaft at their common juncture and forming an overlapping joint between the other end of the spindle and the first end of the shaft at their common juncture prevent trans-axial misalignment of the ends of the spindle and the shaft at their common juncture, an armature shaft bearing carried at the second end of the housing and rotatably supported and connected to the second end of the armature shaft, said coupling means at the common juncture including means releasably drivingly connecting the first end of the armature shaft to the other end of said spindle where upon rotation of said shaft said spindle is driven thereby.
Claim 17
Dependent Claim
52 words
The invention according to claim 14, and said means releasably drivingly connecting the first end of the armature to the other end of the spindle including a member connecting the first end of the shaft with the other end of the spindle to prevent separation axially of the shaft from the spindle.
Claim 18
Dependent Claim
27 words
The invention according to claim 15, and said member including threads couplable with the respective ends of the shaft and spindle to provide a threaded connection therebetween.
Claim 19
Dependent Claim
27 words
The invention according to claim 14, and said means releasably being located within each respective end of the shaft and spindle and surrounded by said bearing structure.
Claim 20
Dependent Claim
61 words
The invention according to claim 14, and said bearing structure including a bearing member recessed within and about the end of the shaft and spindle at the common juncture and a second fixed bearing member on the housing and bearing anti-friction means between said first and second bearing members providing relative rotation of the spindle and shaft relative to the housing.
Claim 21
Dependent Claim
81 words
The invention according to claim 14, and said means releasably being located within each respective end of the shaft and spindle and surrounded by said bearing structure, said bearing structure including a bearing member recessed within and about the end of the shaft and spindle at the common juncture and a second fixed bearing member on the housing and bearing anti-friction means between said first and second bearing members providing relative rotation of the spindle and shaft relative to the housing.
Claim 22
Dependent Claim
41 words
The invention according to claim 14, and said means releasably connecting said ends of said spindle and shaft including a threaded stud projecting from one end and a threaded bore in said other end in which said threaded stud is secured.
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) | 1975-11-28 | 1976-05-29 | 1976-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-28 | 1980-05-29 | 1980-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-28 | 1984-05-29 | 1984-11-28 | $7700.00 | Window Closed / Lapsed |