US3583822A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable power tool
Assignee: Rockwell Manufacturing Co
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Filing: 1968-10-31
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Granted: 1971-06-08
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Expires: 1988-10-31
Abstract
Abstract A portable tool incorporates a motor having a shaft connected through a gear train to drive a gear slidably mounted on a spindle having an external thread and movable axially in a direction normal to the axis of the motor shaft. A feed gear having internal threads is mounted on the spindle and is selectively driven at a first speed to produce positive feed of the spindle and at a second speed to effect rapid advancement of the spindle. Collars are adjustably mounted on the spindle and are effective to provide precise depth control and automatic disengagement of the positive feed and retraction of the spindle.
Inventors
- 👤 Robert H Alexander
- 👤 Walter F Broom
- 👤 David Anthony Boatwright
- 👤 Clyde David Thackston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:31
CPC Classifications
B; B25; B25H; B25H1/00; B25H1/0021; B23; B23B; B23B45/00; B23B45/008; B23B45/04; B23Q; B23Q11/00; B23Q11/04; B23Q5/00; B23Q5/22; B23Q5/32; B23Q5/326; B23Q5/34; B23Q5/348; B23Q5/38; B23Q5/40; B23Q5/402; Y; Y10; Y10T; Y10T408/00; Y10T408/16; Y10T408/17; Y10T408/172; Y10T408/23; Y10T408/65; Y10T408/675; Y10T408/6793; Y10T74/00; Y10T74/17; Y10T74/173
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
220 words
An improved power tool comprising a housing, a rotatable spindle disposed within said housing and having external threads, means supporting said spindle for axial movement relative to said housing, a drive gear mounted on said spindle for rotation therewith, a motor secured to said housing and having a shaft, gear means connecting the shaft of said motor to said drive gear to effect rotation of said spindle in response to rotation of said motor shaft in one direction at a selected speed, a feed gear mounted on said spindle and having internal threads engaging said external threads, means engageable with said gear means for driving said feed gear at a first predetermined speed relative to said drive gear to effect positive axial feeding of said spindle in response to rotation of said motor shaft in said one direction and at said selected speed, means engageable with said gear means for driving said feed gear at a second predetermined speed relative to said drive gear while maintaining the rotation of said motor shaft in said one direction and at said selected speed to effect rapid advancement of said spindle, means for restraining rotation of said feed gear relative to said housing to effect rapid retraction of said spindle, and selectable control means for operating said driving means and said restraining means.
Claim 2
Dependent Claim
220 words
An improved power tool comprising a housing, a rotatable spindle disposed within said housing and having external threads, means supporting said spindle for axial movement relative to said housing, a drive gear mounted on said spindle for rotation therewith, a motor secured to said housing and having a shaft, gear means connecting the shaft of said motor to said drive gear to effect rotation of said spindle in response to rotation of said motor shaft in one direction at a selected speed, a feed gear mounted on said spindle and having internal threads engaging said external threads, means engageable with said gear means for driving said feed gear at a first predetermined speed relative to said drive gear to effect positive axial feeding of said spindle in response to rotation of said motor shaft in said one direction and at said selected speed, means engageable with said gear means for driving said feed gear at a second predetermined speed relative to said drive gear while maintaining the rotation of said motor shaft in said one direction and at said selected speed to effect rapid advancement of said spindle, means for restraining rotation of said feed gear relative to said housing to effect rapid retraction of said spindle, and selectable control means for operating said driving means and said restraining means.
Claim 3
Dependent Claim
71 words
A portable power tool as defined in claim 1 wherein said spindle extends through said housing and is positioned with its axis extending substantially perpendicular to the axis of said motor shaft, and said means for driving said feed gear at said second predetermined rate comprises a high-speed gear having a diameter smaller than that of said feed gear and shiftable in a direction parallel to the axis of said spindle.
Claim 4
Dependent Claim
94 words
A portable power tool as defined in claim 1 wherein said spindle includes a first end portion adapted to be connected to a tool bit and a second end portion projecting outwardly from said housing, a collar threadably mounted on said second end portion of said spindle, stop means mounted on said housing and engageable by said collar to effect a positive stop to axial advancement of said spindle, and cam means for automatically disengaging said driving means for said feed gear in response to a predetermined torque resistance effected by said feed gear.
Claim 5
Dependent Claim
36 words
A portable power tool as defined in claim 1 wherein said control means include a plurality of generally flat parallel cam members each movable in a direction substantially parallel to the axis of said motor shaft.
Claim 6
Dependent Claim
75 words
A portable power tool as defined in claim 1 wherein said means for driving said feed gear at said first and second predetermined speeds comprises a clutch gear movable between a feed position engageable with said gear means rotating said spindle and a retract position engageable with said restraining means through a neutral position, and high-speed gear means for driving said clutch gear in said neutral position to effect said rapid advancement of said spindle.
Claim 7
Dependent Claim
46 words
A portable power tool as defined in claim 5 including adjustable detent means for retaining said clutch gear in said feed positiOn, and means for releasing said detent means in response to a preselected axial thrust on said spindle at the end of the feed stroke.
Claim 8
Dependent Claim
171 words
An improved compact power tool comprising a housing, a rotatable spindle extending through said housing, means supporting said spindle for axial movement relative to said housing, a motor connected to said housing and having a shaft extending substantially perpendicular to the axis of said spindle, a drive gear slidably mounted on said spindle, gear means connecting the shaft of said motor to said drive gear for rotating said spindle in response to rotation of said motor shaft in one direction, means engageable with said gear means for positively feeding said spindle axially at a first predetermined rate in response to rotation of said motor shaft in said one direction, rapid advance means engageable with said gear means for feeding said spindle axially at a second predetermined rate faster than said first rate while maintaining the rotation of said motor shaft in said one direction to effect rapid advancement of said spindle, means for retracting said spindle relative to said housing, and selectable control means for operating said feeding and retracting means.
Claim 9
Dependent Claim
171 words
An improved compact power tool comprising a housing, a rotatable spindle extending through said housing, means supporting said spindle for axial movement relative to said housing, a motor connected to said housing and having a shaft extending substantially perpendicular to the axis of said spindle, a drive gear slidably mounted on said spindle, gear means connecting the shaft of said motor to said drive gear for rotating said spindle in response to rotation of said motor shaft in one direction, means engageable with said gear means for positively feeding said spindle axially at a first predetermined rate in response to rotation of said motor shaft in said one direction, rapid advance means engageable with said gear means for feeding said spindle axially at a second predetermined rate faster than said first rate while maintaining the rotation of said motor shaft in said one direction to effect rapid advancement of said spindle, means for retracting said spindle relative to said housing, and selectable control means for operating said feeding and retracting means.
Claim 10
Dependent Claim
117 words
A portable power tool as defined in claim 7 wherein said gear means for rotating said spindle includes an intermediate gear meshing with said drive gear and including lug means thereon, a clutch gear positioned adjacent said intermediate gear and including lug means on one end, said control means being effective to shift said clutch gear between a neutral position and a feed position where said lug means on said clutch gear engages said lug means on said intermediate gear, said rapid advance means include a high-speed gear for rotating said clutch gear in said neutral position, and means connected to said gear means for driving said high-speed gear in response to actuation of said control means.
Claim 11
Dependent Claim
54 words
A portable power tool as defined in claim 8 wherein said high-speed gear includes lug means thereon, a gear driven by said gear means and having lug means thereon, and means for providing relative movement between said latter gear and said high-speed gear to effect selective engagement of said lug means on said gears.
Claim 12
Dependent Claim
26 words
A portable power tool as defined in claim 8 wherein said clutch gear and high-speed gear have axes extending parallel to the axis of said spindle.
Claim 13
Dependent Claim
74 words
A power tool as defined in claim 1 wherein said spindle includes a first end portion adapted to be connected to a tool bit and a second end portion projecting outwardly from said housing, a collar threadably mounted on said first end portion of said spindle, and means mounted on said collar for rotating said feed gear at the speed of said spindle when said spindle is retracted for automatically disengaging said feeding means.
Claim 14
Dependent Claim
53 words
A power tool as defined in claim 7 wherein said control means include a plurality of cam members located generally between said motor and said spindle in laterally offset relation to said gear means, and each said cam member being movable in a direction substantially parallel to the axis of said motor shaft.
Claim 15
Dependent Claim
140 words
An improved compact power tool comprising a housing, a rotatable spindle extending within said housing, means supporting said spindle for axial movement relative to said housing a motor connected to said housing and having an axis extending substantially perpendicular to the axis of said spindle, drive means connecting said motor to said spindle for rotating said spindle, means engageable with said drive means for positively feeding said spindle axially at a first predetermined rate, means cooperating with said drive means for retracting said spindle relative to said housing, a plurality of generally flat cam members for controlling the operation of said feeding and retracting means and located generally between said motor and said spindle in laterally offset relation to said drive means, and each said cam member being movable in a direction substantially paRallel to the axis of said motor.
Claim 16
Dependent Claim
140 words
An improved compact power tool comprising a housing, a rotatable spindle extending within said housing, means supporting said spindle for axial movement relative to said housing a motor connected to said housing and having an axis extending substantially perpendicular to the axis of said spindle, drive means connecting said motor to said spindle for rotating said spindle, means engageable with said drive means for positively feeding said spindle axially at a first predetermined rate, means cooperating with said drive means for retracting said spindle relative to said housing, a plurality of generally flat cam members for controlling the operation of said feeding and retracting means and located generally between said motor and said spindle in laterally offset relation to said drive means, and each said cam member being movable in a direction substantially paRallel to the axis of said motor.
Claim 17
Dependent Claim
172 words
An improved compact power tool comprising a housing, a rotatable spindle extending through said housing, means supporting said spindle for axial movement relative to said housing, a drive gear slidably mounted on said spindle, a motor connected to said housing and having a shaft extending substantially perpendicular to said spindle, gear means connecting the shaft of said motor to said drive gear for rotating said spindle in response to rotation of said motor shaft in one direction, means engageable with said gear means for positively feeding said spindle axially at a first predetermined rate in response to rotation of said motor shaft in said one direction, rapid advance means engageable with said gear means for feeding said spindle axially at a second predetermined rate faster than said first rate while maintaining the rotation of said motor shaft in said one direction to effect rapid advancement of said spindle, means for retracting said spindle relative to said housing, said rapid advance means include a movable gear, and control means for moving said gear.
Claim 18
Dependent Claim
172 words
An improved compact power tool comprising a housing, a rotatable spindle extending through said housing, means supporting said spindle for axial movement relative to said housing, a drive gear slidably mounted on said spindle, a motor connected to said housing and having a shaft extending substantially perpendicular to said spindle, gear means connecting the shaft of said motor to said drive gear for rotating said spindle in response to rotation of said motor shaft in one direction, means engageable with said gear means for positively feeding said spindle axially at a first predetermined rate in response to rotation of said motor shaft in said one direction, rapid advance means engageable with said gear means for feeding said spindle axially at a second predetermined rate faster than said first rate while maintaining the rotation of said motor shaft in said one direction to effect rapid advancement of said spindle, means for retracting said spindle relative to said housing, said rapid advance means include a movable gear, and control means for moving said gear.
References Cited (Backward Citations)
US2893272A
Cited
US3487729A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-07 | 1974-12-07 | 1975-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-07 | 1978-12-07 | 1979-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-07 | 1982-12-07 | 1983-06-08 | $7700.00 | Window Closed / Lapsed |