Patent US3779110A successfully refreshed from Google Patents.
US3779110A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lathes with chuck transfer mechanism
Assignee: Alfred Herbert Ltd
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Filing: 1971-04-08
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Granted: 1973-12-18
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Expires: 1991-04-08
Abstract
Abstract A lathe is provided with a chuck transfer mechanism which includes a head having a circular opening to receive a chuck for transfer. For holding the chuck in the opening there is a plurality of fluid actuated plunger devices around the opening with the devices interconnected to permit displacement of fluid from one device to another. This allows transverse movement of the chuck relative to the head to allow a toothed locating device on the chuck to align itself accurately with a complementary toothed locating device on the work spindle.
Inventors
- 👤 J Harman
- 👤 M Norman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:33
CPC Classifications
B; B23; B23Q; B23Q1/00; B23Q1/25; B23Q1/64; B23Q1/66; B23B; B23B31/00; B23B31/02; B23B31/36; B23Q1/70; B23Q1/706; B23Q3/00; B23Q3/02; B23Q3/10; B23Q3/101; Y; Y10; Y10T; Y10T483/00; Y10T483/17; Y10T483/1702; Y10T483/1707; Y10T483/171; Y10T82/00; Y10T82/25; Y10T82/2514
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
257 words
A lathe comprising a frame; a headstock spindle carried by the frame; means for movably carrying a tool on said frame for operating on a workpiece carried in a chuck on the spindle; a dummy spindle on the frame on which a chuck can be set up prior to transfer to the headstock spindle; a toothed coupling device on the headstock spindle constituting the sole means for locating a chuck having a complementary toothed coupling device on the spindle in a unique axial and transverse position and a unique angular orientation relative thereto; drawing means on the spindle for co-acting with complementary means on a chuck for drawing the latter towards the spindle to interengage the toothed coupling device on the spindle with that on the chuck; a chuck transfer head movably mounted on the frame for transferring a chuck from the dummy spindle to the headstock spindle; holding means on said head for retaining a chuck thereon during transfer and permitting slight radial movement of a chuck held thereby relative to said head during drawing of such chuck towards the spindle by said drawing means, said holding means comprising a plurality of plungers arranged around an opening in the head which receives with radial clearance a chuck for transfer, only said plungers engaging the chuck, and a plurality of fluidoperated units operatively connected to the respective plungers for inward and outward displacement of the latter, the fluidoperated units being interconnected so that radial movement of the chuck causes displacement of fluid from one unit to another.
Claim 2
Dependent Claim
257 words
A lathe comprising a frame; a headstock spindle carried by the frame; means for movably carrying a tool on said frame for operating on a workpiece carried in a chuck on the spindle; a dummy spindle on the frame on which a chuck can be set up prior to transfer to the headstock spindle; a toothed coupling device on the headstock spindle constituting the sole means for locating a chuck having a complementary toothed coupling device on the spindle in a unique axial and transverse position and a unique angular orientation relative thereto; drawing means on the spindle for co-acting with complementary means on a chuck for drawing the latter towards the spindle to interengage the toothed coupling device on the spindle with that on the chuck; a chuck transfer head movably mounted on the frame for transferring a chuck from the dummy spindle to the headstock spindle; holding means on said head for retaining a chuck thereon during transfer and permitting slight radial movement of a chuck held thereby relative to said head during drawing of such chuck towards the spindle by said drawing means, said holding means comprising a plurality of plungers arranged around an opening in the head which receives with radial clearance a chuck for transfer, only said plungers engaging the chuck, and a plurality of fluidoperated units operatively connected to the respective plungers for inward and outward displacement of the latter, the fluidoperated units being interconnected so that radial movement of the chuck causes displacement of fluid from one unit to another.
Claim 3
Dependent Claim
28 words
The lathe as claimed in claim 1 in which each plunger is connected to a piston rod of its associated fluid operated unit by a motion magnifying lever.
Claim 4
Dependent Claim
23 words
The lathe as claimed in claim 2 in which said head has a pair of openings for simultaneously receiving a pair of chucks.
Claim 5
Dependent Claim
43 words
The lathe as claimed in claim 3 in which the dummy spindle is spaced from and parallel to, the headstock spindle and the head is angularly movable about an axis parallel to and equally spaced from, the headstock spindle, and the dummy spindle.
Claim 6
Dependent Claim
87 words
The lathe as claimed in claim 4 in which there is a further toothed coupling device on the dummy spindle arranged in a plane spaced from the plane of the toothed coupling device of the headstock spindle such that when the head occupies a position with a chuck retained in one opening having its toothed coupling device engaged with the toothed coupling device on the headstock spindles the toothed coupling device of a chuck in the other opening is axially spaced from said further toothed coupling device.
Claim 7
Dependent Claim
38 words
The lathe as claimed in claim 5 including further drawing means on said dummy spindle for drawing a chuck towards said dummy spindle to interengage said further toothed coupling device with the toothed coupling device of the chuck.
Claim 8
Dependent Claim
41 words
The lathe as claimed in claim 1 including a key secured to the head and arranged to fit in a notch in the periphery of a chuck held by the head to prevent turning of the chuck relative to the head.
Claim 9
Dependent Claim
48 words
The lathe as claimed in claim 1 in which said drawing means includes a screw-threaded sleeve mounted on the headstock spindle for rotation therewith and means for imparTing relative rotation to a complementarily screw threaded sleeve rotatably mounted on a chuck to be mounted on the headstock spindle.
Claim 10
Dependent Claim
43 words
The lathe as claimed in claim 8 in which said rotation imparting means comprises a rotatable key adapted to be received by a socket in a gear rotatably mounted on the chuck and meshed with gear teeth on said complementarily screw threaded sleeve.
Claim 11
Dependent Claim
25 words
The lathe as claimed in claim 9 in which said key is also displaceable in a direction parallel to the axis of the headstock spindle.
Claim 12
Dependent Claim
52 words
The lathe as claimed in claim 10 in which the key is mounted on a member slidably mounted on the frame and having elongated gear teeth, a fluid operated unit being provided for displacing said unit axially and a gear, connected by a clutch to drive means, engages said elongated gear teeth.
Claim 13
Dependent Claim
43 words
The lathe as claimed in claim 11 in which said fluid operated unit comprises a piston on a piston rod formed with longitudinal drillings opening on to apposite sides of said piston, said piston being slidably engaged in a bore in said member.
Claim 14
Dependent Claim
20 words
The lathe as claimed in claim 11 in which said drive means is also used for driving the headstock spindle.
References Cited (Backward Citations)
US3550487A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-17 | 1977-06-18 | 1977-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-17 | 1981-06-18 | 1981-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-17 | 1985-06-18 | 1985-12-18 | $7700.00 | Window Closed / Lapsed |