US3802298A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Screw feed unit head
Assignee: Individual
•
Filing: 1972-08-31
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Granted: 1974-04-09
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Expires: 1992-08-31
Abstract
Abstract A screw feed unit head comprises a drive motor and a spindle mounted in a body slidable along a way formed on a base member, the spindle being arranged to be driven by the motor and being adapted to be coupled to a cutting tool. A lead screw is fixedly mounted on the base member and co-operates with a nut rotatably mounted in the body, the nut being non-displaceable relative to the body. A quick traverse motor is detachably mounted in one side of the body and a detachable drive unit for transmitting drive from the spindle to the nut through a clutch and from the quick traverse motor to the nut directly is mounted in the opposite side of the body. In an alternative embodiment, the nut is fixedly mounted in the body and the lead screw is mounted rotatably in a thrust block secured to the base member, the spindle being non-displaceable relative to the thrust block. The quick traverse motor and drive unit are detachably mounted in the thrust block, the drive unit being arranged for transmitting drive to the lead screw from either the quick traverse motor or from a feed motor also mounted on the thrust block.
Inventors
- 👤 J Thomson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 19:33
CPC Classifications
B; B23; B23Q; B23Q5/00; B23Q5/22; B23Q5/34; B23Q5/348; Y; Y10; Y10T; Y10T408/00; Y10T408/65; Y10T408/675; Y10T408/6771; Y10T408/6774; Y10T74/00; Y10T74/17
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
180 words
In a unit head comprising; a drive motor; a spindle arranged to be driven by the motor and adapted to be coupled to a cutting tool; and screw means for feeding the spindle and associated tool relative to a base member; the improvement wherein: the screw means comprises first and second elements threadedly engaged with one another; said first element is rotatable and axially translatable relative to the base member but is non-translatable relative to the spindle; said second element is fixed against both rotation and displacement relative to the base member; drive means is provided for transmitting rotary drive from the spindle through clutch means to the first element to translate the latter and the spindle relative to the base member; a quick-traverse motor is provided; there is further provided means for transmitting drive from the quick traverse-motor to said first element, whereby the first element can be rotated in either direction to translate same and the spindle more rapidly relative to the base member, the clutch means then permitting rotation of the first element independently of the spindle.
Claim 2
Dependent Claim
180 words
In a unit head comprising; a drive motor; a spindle arranged to be driven by the motor and adapted to be coupled to a cutting tool; and screw means for feeding the spindle and associated tool relative to a base member; the improvement wherein: the screw means comprises first and second elements threadedly engaged with one another; said first element is rotatable and axially translatable relative to the base member but is non-translatable relative to the spindle; said second element is fixed against both rotation and displacement relative to the base member; drive means is provided for transmitting rotary drive from the spindle through clutch means to the first element to translate the latter and the spindle relative to the base member; a quick-traverse motor is provided; there is further provided means for transmitting drive from the quick traverse-motor to said first element, whereby the first element can be rotated in either direction to translate same and the spindle more rapidly relative to the base member, the clutch means then permitting rotation of the first element independently of the spindle.
Claim 3
Dependent Claim
213 words
In a screw feed unit head comprising: a drive motor; a spindle arranged to be driven by the motor and adapted to be coupled to a cutting tool; and screw means for feeding the spindle and associated tool relative to a base member; the improvement wherein: said screw means comprises first and second elements threadedly engaged with one another; said first element is fixed against both rotation and displacement relative to the spindle; said second element is carried on the base member by bearing means providing for rotation of the second element relative to the base member, but preventing translation of the second element relative to the base member; a feed motor is provided for driving said second element rotatably; a quick-traverse motor is provided for driving said second element at a higher speed; and drive means is provided for transmitting rotary drive selectively from one of said feed motor and quick-traverse motor to said second element, the drive means comprising a drive unit which is dismountable from the remainder of the unit head and which includes a rotatable output element releasably coupled with said second element for driving same, and first and second rotatable input elements releasably coupled respectively with said feed motor and said quick-traverse motor to be driven by same.
Claim 4
Dependent Claim
213 words
In a screw feed unit head comprising: a drive motor; a spindle arranged to be driven by the motor and adapted to be coupled to a cutting tool; and screw means for feeding the spindle and associated tool relative to a base member; the improvement wherein: said screw means comprises first and second elements threadedly engaged with one another; said first element is fixed against both rotation and displacement relative to the spindle; said second element is carried on the base member by bearing means providing for rotation of the second element relative to the base member, but preventing translation of the second element relative to the base member; a feed motor is provided for driving said second element rotatably; a quick-traverse motor is provided for driving said second element at a higher speed; and drive means is provided for transmitting rotary drive selectively from one of said feed motor and quick-traverse motor to said second element, the drive means comprising a drive unit which is dismountable from the remainder of the unit head and which includes a rotatable output element releasably coupled with said second element for driving same, and first and second rotatable input elements releasably coupled respectively with said feed motor and said quick-traverse motor to be driven by same.
Claim 5
Dependent Claim
34 words
The improvement according to claim 1 wherein said clutch means is adapted to slip at a predetermined torque load, thereby limiting the torque which can be transmitted from the spindle to the first element.
Claim 6
Dependent Claim
79 words
The improvement according to claim 1 wherein: said spindle and said first element of the screw means are mounted in a body which is slidable on the base member; and the drive means comprises a unit insertable into the body, such unit including said clutch means, a first rotatable input element connectable with the spindle, a second rotatable input element connectable with the quick-traverse motor, and a rotatable output element connectable with said first element of the screw means.
Claim 7
Dependent Claim
55 words
The improvement according to claim 2 wherein: the unit head further comprises a housing rigid with the base member; bearing means for supporting said second element of the screw means is secured to said housing; said drive unit is releasably mounted in said housing; and said quick-traverse motor is also releasably mounted in the housing.
Claim 8
Dependent Claim
59 words
The improvement according to claim 2 wherein said drive unit further comprises clutch means operatively interposed between a first of said rotatable input elements and the rotatable output element, a second of said rotatable input elements beiNg connectable with the quick-traverse motor, whereby said clutch means permits the feed motor to be selectively coupled to the rotatable output element.
Claim 9
Dependent Claim
39 words
The improvement according to claim 6 wherein said clutch means is adapted to slip at a predetermined torque load, thus limiting the torque which can be transmitted from said feed motor to the second element of the screw means.
Claim 10
Dependent Claim
29 words
The improvement according to claim 6 wherein said second rotatable input element and said rotatable output element are rigidly connected with one another for rotation about a common axis.
Claim 11
Dependent Claim
29 words
The improvement according to claim 4 wherein said second rotatable input element and said rotatable output element are rigidly connected with one another for rotation about a common axis.
Claim 12
Dependent Claim
35 words
The improvement according to claim 4 wherein said second rotatable input element is connectable with the quick-traverse motor by means which provides for axial sliding movement of the quick-traverse motor relative to the drive unit.
Claim 13
Dependent Claim
35 words
The improvement according to claim 5 wherein said second rotatable input element is connectable with the quick-traverse motor by means which provides for axial sliding movement of the quick-traverse motor relative to the drive unit.
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) | 1977-04-08 | 1977-10-08 | 1978-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-08 | 1981-10-08 | 1982-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-08 | 1985-10-08 | 1986-04-09 | $7700.00 | Window Closed / Lapsed |