US3869924A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for transmitting accurate translational and rotary movements
Assignee: PATHOLD Inc
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Filing: 1974-02-11
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Granted: 1975-03-11
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Expires: 1994-02-11
Abstract
Abstract A device for transmitting accurate translational and rotary movements includes a rotary input shaft on which is mounted a rotary driving cam which is engaged with a pivotal follower carried on a lever which is pivotally mounted at its one end and has said follower intermediate its length so that the lever is moved backwardly and forwardly. The lever carries a drive roller at its outer end which engages in an annular slot of a disc carried on an output shaft and oscillation of the lever by movement of the cam causes a back and forward axial displacement of the output shaft. Rotary movement is imparted to the output shaft after it first moves through a path in which it is constrained against rotary movement by two roller members which are carried on a fixation piece affixed to the shaft and which are guided on respective sides of an elongated keyway of the housing. The rollers move out of engagement with the keyway after a pinion gear carried on the shaft is moved into meshing engagement with a rack which is carried on a slide which is mounted for movement backwardly and forwardly on one or more guide rods. The slide also carries a follower which is moved by a different cam part and, when it is in meshing engagement with the pinion gear, it produces a controlled rotation of the output shaft. A ribbed barrel cam is employed for effecting accurate rotational movement of the output shaft through the use of two roller followers arranged on respective sides of the ribbed cam and which are preloaded against the cam. The rack is arranged so that it is at a slight angle in respect to the horizontal so that it provides an easy entry of the sliding rotatable pinion gear and meshes therewith without interference after engagement.
Inventors
- 👤 Earl F Beezer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:24
CPC Classifications
F; F16; F16H; F16H37/00; F16H37/12; F16H37/16; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18048; Y10T74/18056; Y10T74/18296; Y10T74/18304; Y10T74/18312; Y10T74/21; Y10T74/2101
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
220 words
A motion transmitting device, comprising a rotary input shaft having rotary control cam means thereon, a rotary and axially movable output shaft having a pinion gear thereon, means supporting said input shaft for rotary movement and said output shaft for rotary and axial movement, a lever engaged with said cam means and said output shaft and being movable by said cam means to shift said output shaft axially, rotary drive means connected to said cam means and including a drive gear moved by said cam means engageable with said pinion gear to rotate said output shaft when it is in a predetermined axial position, said pinion gear being disengageable from said drive gear to permit axial movement without rotation, and holder means to hold said output shaft against rotation at positions of said output shaft when said pinion gear is out of engagement with said drive gear and to permit easy interengagement of said gears including at least one key elongated in the axial direction of said shaft and fixed in said housing and a control plate affixed to said shaft for rotation therewith having a plurality of circumferentially spaced pairs of transversely spaced guide rollers adapted to bear along respective sides of said key to hold the said output shaft in a fixed angular position during its linear movement.
Claim 2
Dependent Claim
220 words
A motion transmitting device, comprising a rotary input shaft having rotary control cam means thereon, a rotary and axially movable output shaft having a pinion gear thereon, means supporting said input shaft for rotary movement and said output shaft for rotary and axial movement, a lever engaged with said cam means and said output shaft and being movable by said cam means to shift said output shaft axially, rotary drive means connected to said cam means and including a drive gear moved by said cam means engageable with said pinion gear to rotate said output shaft when it is in a predetermined axial position, said pinion gear being disengageable from said drive gear to permit axial movement without rotation, and holder means to hold said output shaft against rotation at positions of said output shaft when said pinion gear is out of engagement with said drive gear and to permit easy interengagement of said gears including at least one key elongated in the axial direction of said shaft and fixed in said housing and a control plate affixed to said shaft for rotation therewith having a plurality of circumferentially spaced pairs of transversely spaced guide rollers adapted to bear along respective sides of said key to hold the said output shaft in a fixed angular position during its linear movement.
Claim 3
Dependent Claim
220 words
A motion transmitting device, comprising a rotary input shaft having rotary control cam means thereon, a rotary and axially movable output shaft having a pinion gear thereon, means supporting said input shaft for rotary movement and said output shaft for rotary and axial movement, a lever engaged with said cam means and said output shaft and being movable by said cam means to shift said output shaft axially, rotary drive means connected to said cam means and including a drive gear moved by said cam means engageable with said pinion gear to rotate said output shaft when it is in a predetermined axial position, said pinion gear being disengageable from said drive gear to permit axial movement without rotation, and holder means to hold said output shaft against rotation at positions of said output shaft when said pinion gear is out of engagement with said drive gear and to permit easy interengagement of said gears including at least one key elongated in the axial direction of said shaft and fixed in said housing and a control plate affixed to said shaft for rotation therewith having a plurality of circumferentially spaced pairs of transversely spaced guide rollers adapted to bear along respective sides of said key to hold the said output shaft in a fixed angular position during its linear movement.
Claim 4
Dependent Claim
220 words
A motion transmitting device, comprising a rotary input shaft having rotary control cam means thereon, a rotary and axially movable output shaft having a pinion gear thereon, means supporting said input shaft for rotary movement and said output shaft for rotary and axial movement, a lever engaged with said cam means and said output shaft and being movable by said cam means to shift said output shaft axially, rotary drive means connected to said cam means and including a drive gear moved by said cam means engageable with said pinion gear to rotate said output shaft when it is in a predetermined axial position, said pinion gear being disengageable from said drive gear to permit axial movement without rotation, and holder means to hold said output shaft against rotation at positions of said output shaft when said pinion gear is out of engagement with said drive gear and to permit easy interengagement of said gears including at least one key elongated in the axial direction of said shaft and fixed in said housing and a control plate affixed to said shaft for rotation therewith having a plurality of circumferentially spaced pairs of transversely spaced guide rollers adapted to bear along respective sides of said key to hold the said output shaft in a fixed angular position during its linear movement.
Claim 5
Dependent Claim
33 words
A motion transmitting device, according to claim 1, wherein said control plate has a periphery with a plurality of circumferentially spaced flat chordal mounting surfaces for each of said sets of guide rollers.
Claim 6
Dependent Claim
31 words
A motion transmitting device, according to claim 1, wherein said drive gear comprises a rack, a slide carrying said rack, means in said housing for guiding said slide backwardly and forwardly.
Claim 7
Dependent Claim
52 words
A motion transmitting device, according to claim 3, wherein said cam means includes a separate disc cam and ribbed barrel cam with an outwardly projecting cam rib, said slide having a roller which is preloaded against each side of said cam rib whereby said slide is moved without play backwardly and forwardly.
Claim 8
Dependent Claim
46 words
A motion transmitting device, according to claim 4, wherein said rack gear is cocked at a small angle in respect to said pinion gear in order to permit easy interengagement thereof and to provide a slight pitch interference during engagement so as to eliminate gear backlash.
Claim 9
Dependent Claim
194 words
A motion transmitting device comprising a housing, a rotary input shaft rotatably mounted in said housing, a rotary and axially movable output shaft mounted in said housing for rotatable and axial movement, a lever pivoted in said housing and having a drive member engaged with said output shaft to move it axially backwardly and forwardly, cam means on said input shaft including a first cam portion engageable with said lever to oscillate it backwardly and forwardly in a second cam portion, a slide, means in said housing for guiding said slide from backward and forward movement transverse to the axis of said output shaft, a pinion gear carried on said output shaft at a fixed location along its length and being engageable with said rack at a predetermined axial position of said output shaft, said slide having follower means engaged with said second cam portion and being movable by rotation of said second cam portion backwardly and forwardly, and holder means to hold said output shaft against rotation at positions of said output shaft when said pinion gear is out of engagement with said drive gear and to permit easy interengagement of said gears.
Claim 10
Dependent Claim
194 words
A motion transmitting device comprising a housing, a rotary input shaft rotatably mounted in said housing, a rotary and axially movable output shaft mounted in said housing for rotatable and axial movement, a lever pivoted in said housing and having a drive member engaged with said output shaft to move it axially backwardly and forwardly, cam means on said input shaft including a first cam portion engageable with said lever to oscillate it backwardly and forwardly in a second cam portion, a slide, means in said housing for guiding said slide from backward and forward movement transverse to the axis of said output shaft, a pinion gear carried on said output shaft at a fixed location along its length and being engageable with said rack at a predetermined axial position of said output shaft, said slide having follower means engaged with said second cam portion and being movable by rotation of said second cam portion backwardly and forwardly, and holder means to hold said output shaft against rotation at positions of said output shaft when said pinion gear is out of engagement with said drive gear and to permit easy interengagement of said gears.
Claim 11
Dependent Claim
44 words
A motion transmitting device, according to claim 6, wherein said second cam portion comprises a barrel cam having an outwardly projecting rib cam portion, said slide having a roller engaged with each side surface of said ribbed cam portion and comprising said follower means.
Claim 12
Dependent Claim
39 words
A motion transmitting device, according to claim 7, wherein said first cam portion comprises a disc cam having a side face with a cam groove therein, said lever having a follower intermediate its length engaged in said cam groove.
Claim 13
Dependent Claim
72 words
A motion transmitting device, according to claim 6, wherein said holder means comprises an elongated key affixed in said housing and extending along the axis of said shaft, a control plate affixed to said shaft having at least one set of transversely spaced rollers of a size to bear tightly against each side of said key in positions of said shaft when said pinion gear is out of engagement with said rack.
Claim 14
Dependent Claim
101 words
A motion transmitting device, according to claim 6, wherein said input shaft is mounted with its axis extending transversely to the axis of said output shaft, said cam means comprising a disc cam forming said first cam portion and a ribbeD barrel cam forming said second cam portion, said lever follower being engaged with said disc cam, said slide carrying said rack having a roller engaged on respective sides of said ribbed barrel cam, said rack gear being cocked at a small angle in respect to said pinion gear for facilitating intermeshing engagement thereof and engagement without backlash during full engagement.
Claim 15
Dependent Claim
75 words
A motion transmitting device, according to claim 10, including a control disc on said output shaft having an annular groove in its circumference, said driver of said lever engaging into said groove, said output shaft and said slide being mounted in linear ball bearings for respective axial movements thereof, said plate having a plurality of circumferentially spaced pairs of holding rollers engageable with said key in accordance with the angular position of said output shaft.
References Cited (Backward Citations)
US3731545A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-10 | 1978-09-09 | 1979-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-10 | 1982-09-09 | 1983-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-10 | 1986-09-09 | 1987-03-11 | $7700.00 | Window Closed / Lapsed |