US3881339A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extrusion pullers
Assignee: EDWARDS OF ENFIELD Ltd A BRITISH CORP
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Filing: 1973-05-23
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Granted: 1975-05-06
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Expires: 1993-05-23
Abstract
Abstract An extrusion puller comprising an elongated rail, with a carriage movable along the said rail, the said carriage carrying a gripper head for grasping the end of the extrusion to be pulled, and the carriage being powered by an on-board linear motor co-operable with the said rail.
Inventors
- 👤 Keith Edward Mannell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:18
CPC Classifications
H; H02; H02K; H02K41/00; H02K41/02; H02K41/025; B; B21; B21C; B21C1/00; B21C1/16; B21C1/27; B21C1/30; B21C1/305; B21C35/00; B21C35/02
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
91 words
An extrusion puller comprising an elongated rail, a carriage and at least one on-board linear motor, means connected between said carriage and said linear motor for driving said carriage along said rail, said carriage carrying a gripper head for grasping the end of the extrusion to be pulled, and said carriage being powered by said on-board linear motor, said linear motor and said means cooperating with said carriage and rail not only for driving the carriage along the rail but also for providing by slippage a clutch effect for pulling control.
Claim 2
Dependent Claim
91 words
An extrusion puller comprising an elongated rail, a carriage and at least one on-board linear motor, means connected between said carriage and said linear motor for driving said carriage along said rail, said carriage carrying a gripper head for grasping the end of the extrusion to be pulled, and said carriage being powered by said on-board linear motor, said linear motor and said means cooperating with said carriage and rail not only for driving the carriage along the rail but also for providing by slippage a clutch effect for pulling control.
Claim 3
Dependent Claim
65 words
An extrusion puller according to claim 1 and including a power supply for transmitting energy to said linear motor, said power supply including stationary conductors extending in the same direction as and located in the vicinity of said rail and pick-up members carried by said carriage for movement therewith and contacting said stationary conductors, so that there are no trailing wires associated with said carriage.
Claim 4
Dependent Claim
29 words
An extrusion puller according to claim 2 wherein said rail is of sandwich form having an aluminium covering between said rail and an active surface of said linear motor.
Claim 5
Dependent Claim
42 words
An extrusion puller according to claim 1 including a power supply to said linear motor on the carriage, said power supply being controlled by wireless signals from a remote control station, said carriage carrying a power variation device for receiving said signals.
Claim 6
Dependent Claim
54 words
An extrusion puller according to claim 4 wherein the signals are low frequency radio signals, an aerial extending for the full length of the rail and said power variation device including carrying said radio signals, and an encapsulated antenna mounted on the carriage for receiving said signals and for controlling said power variation device.
Claim 7
Dependent Claim
22 words
An extrusion puller according to claim 1 wherein solid state circuitry is carried on board the carriage for controlling said linear motor.
Claim 8
Dependent Claim
49 words
An extrusion puller according to claim 1 wherein the gripper head houses a plurality of horizontally pivoted depending fingers, which are individually tiltable about a common axis and are individually spring loaded, and power means for collectively driving said fingers out of and into engagement with an extrusion end.
Claim 9
Dependent Claim
31 words
An extrusion puller according to claim 7 wherein the gripper head further comprises two half jaws movable laterally outwardly about horizontal axes at right angles to the axis of the fingers.
Claim 10
Dependent Claim
17 words
An extrusion puller according to claim 1 wherein said rail which carries the carriage is a monorail.
Claim 11
Dependent Claim
20 words
An extrusion puller according to claim 2 wherein said conductors are formed with grooves therebelow to receive said pickup members.
Claim 12
Dependent Claim
19 words
An extrusion puller according to claim 1 wherein the carriage is provided with top, bottom and side guide rollers.
Claim 13
Dependent Claim
29 words
An extrusion puller according to claim 1 wherein the rail is in a horizontal plane and mounted alongside said rail is a run-out conveyor over which the carriage travels.
Claim 14
Dependent Claim
26 words
An extrusion puller according to claim 1 wherein said rail is tilted and mounted alongside said rail is a run-out conveyor over which the carriage travels.
Claim 15
Dependent Claim
26 words
An extrusion puller according to claim 1 including a runout conveyor and wherein said rail is mounted below a run-out conveyor along which the carriage travEls.
Claim 16
Dependent Claim
27 words
An extrusion puller according to claim 1 including a runout conveyor and wherein the carriage is mounted above said run-out conveyor and over which the carriage travels.
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) | 1978-05-05 | 1978-11-04 | 1979-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-05 | 1982-11-04 | 1983-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-05 | 1986-11-04 | 1987-05-06 | $7700.00 | Window Closed / Lapsed |