US3581597A
Expired / Lapsed
US
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Differential drive mechanism
Assignee: HY TORQ CORP
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Filing: 1970-04-29
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Granted: 1971-06-01
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Expires: 1990-04-29
Abstract
Abstract A differential drive mechanism has a driven rotatable body serving to drive either or both of a pair of coaxially mounted, axle-driving hubs and to permit overrunning of either hub. Rollers between the hubs and the bodies are mounted in two cages which have limited lost motion therebetween and which are individually retarded by O-ring actuators to move the rollers into driving engagement with the hubs and the body, and are individually held in free running positions by damping O-rings. The body has grooves into which the rollers laterally project and having ramp angles between about 3* and about 6* to wedge the rollers between the body and the hubs.
Inventors
- 👤 William L Reiersgaard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:17
CPC Classifications
F; F16; F16H; F16H48/00; F16H48/12; F16H48/19; F16D; F16D41/00; F16D41/06; F16D41/08; F16D41/10; F16D41/105; F16H48/16; F16H48/20; F16H48/24; F16H48/38; F16H48/40; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19005
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
144 words
In a differential drive mechanism, a rotatable drive casing having two sets of ramp portions, a pair of driven hub members coaxially mounted in end to end relation in the drive casing for independent rotation, two sets of rollers mounted between said drive casing and the driven hub members for circumferential movement between released positions and driven positions by a wedging action of the rollers therebetween, a pair of annular cages holding the rollers and rotatable relative to each other and to the casing and hub members, a pair of frictional actuating means coupling the cages and the driven hub members tending to move the sets of rollerS individually into driving positions relative to the casing and the hub members, and a pair of frictional damping means coupling the cages and the casing tending to resist movement of the cages relative to the casing.
Claim 2
Dependent Claim
144 words
In a differential drive mechanism, a rotatable drive casing having two sets of ramp portions, a pair of driven hub members coaxially mounted in end to end relation in the drive casing for independent rotation, two sets of rollers mounted between said drive casing and the driven hub members for circumferential movement between released positions and driven positions by a wedging action of the rollers therebetween, a pair of annular cages holding the rollers and rotatable relative to each other and to the casing and hub members, a pair of frictional actuating means coupling the cages and the driven hub members tending to move the sets of rollerS individually into driving positions relative to the casing and the hub members, and a pair of frictional damping means coupling the cages and the casing tending to resist movement of the cages relative to the casing.
Claim 3
Dependent Claim
24 words
The differential drive mechanism of claim 1 wherein the force of each damping means is substantially less than the force of each actuating means.
Claim 4
Dependent Claim
28 words
The differential drive mechanism of claim 2 wherein the force of each damping means is not substantially greater than 80 percent of the force of each actuating means.
Claim 5
Dependent Claim
23 words
The differential drive mechanism of claim 1 in which at least one of the actuating means and the damping means is an O-ring.
Claim 6
Dependent Claim
18 words
The differential drive mechanism of claim 1 wherein both the actuating means and the damping means are O-rings.
Claim 7
Dependent Claim
19 words
The differential drive mechanism of claim 5 in which the actuating O-rings are compressed more than the damping O-rings.
Claim 8
Dependent Claim
27 words
The differential drive mechanism of claim 6 in which the compression of said damping O-rings does not exceed 80 percent of the compression of said actuating O-rings.
Claim 9
Dependent Claim
22 words
The differential drive mechanism of claim 1 wherein the ramp portions of the drive casing have ramp angles not substantially below 3*.
Claim 10
Dependent Claim
23 words
The differential drive mechanism of claim 1 wherein the ramp portions of the drive casing have ramp angles not substantially greater than 6*.
Claim 11
Dependent Claim
25 words
The differential drive mechanism of claim 1 in which the ramp portions of the drive body have ramp angles between about 3* and about 6*.
Claim 12
Dependent Claim
20 words
The differential drive mechanism of claim 1 in which relative circumferential movement of the cages is limited to about 1.
Claim 13
Dependent Claim
41 words
The differential drive mechanism of claim 1 wherein each of the damping means comprises a frictional member pressed between the casing and one of the cages and frictionally engaging at least one of the casing and said one of the cages.
Claim 14
Dependent Claim
24 words
The differential drive mechanism of claim 12 wherein each of the damping means frictionally engages both the casing and said one of the cages.
Claim 15
Dependent Claim
38 words
The differential drive mechanism of claim 13 wherein each of the damping means is an O-ring of plastic material on the outer circumference of one of the cages and under lateral compression between that cage and the casing.
Claim 16
Dependent Claim
12 words
The differential drive mechanism of claim 1 wherein the rollers are crowned.
Claim 17
Dependent Claim
95 words
In a differential drive mechanism, casing means including a body having a cylindrical bore and a hard metal liner sleeve shrunk fit into the bore and having inner, longitudinal extending grooves forming ramps, a pair of hubs in the sleeve, a pair of sets of roller bearings positioned in the grooves and in engagement with the hubs and adapted to be moved between free running positions in the grooves and drive positions engaging the ramps, a pair of cages engaging the rollers, and a pair of frictional actuator means engaging the hubs and the cages.
Claim 18
Dependent Claim
95 words
In a differential drive mechanism, casing means including a body having a cylindrical bore and a hard metal liner sleeve shrunk fit into the bore and having inner, longitudinal extending grooves forming ramps, a pair of hubs in the sleeve, a pair of sets of roller bearings positioned in the grooves and in engagement with the hubs and adapted to be moved between free running positions in the grooves and drive positions engaging the ramps, a pair of cages engaging the rollers, and a pair of frictional actuator means engaging the hubs and the cages.
Claim 19
Dependent Claim
20 words
The differential drive mechanism of claim 16 including a pair of damping means engaging the cages and the casing means.
Claim 20
Dependent Claim
149 words
In a differential drive mechanism, a rotatable drive casing rotatable on a predetermined axis and having two sets of ramp portions extending parallel to , ramp portions of the drive casing having ramp angles between about 3* and about 6*, a pair of driven hub members coaxially mounted in end to end relation in the drive casing for independent rotation, two sets of rollers mounted between said drive casing and the driven hub members for circumferential movements between released positions and driven positions by wedging action of the rollers therebetween, a pair of annular cages holding the rollers and rotatable relative to each other up to about 1 and to the casing and hub members, and a pair of frictional actuating means coupling the cages and the driven hub members tending to move the sets of rollers individUally into driving positions relative to the casing and the hub members.
Claim 21
Dependent Claim
149 words
In a differential drive mechanism, a rotatable drive casing rotatable on a predetermined axis and having two sets of ramp portions extending parallel to , ramp portions of the drive casing having ramp angles between about 3* and about 6*, a pair of driven hub members coaxially mounted in end to end relation in the drive casing for independent rotation, two sets of rollers mounted between said drive casing and the driven hub members for circumferential movements between released positions and driven positions by wedging action of the rollers therebetween, a pair of annular cages holding the rollers and rotatable relative to each other up to about 1 and to the casing and hub members, and a pair of frictional actuating means coupling the cages and the driven hub members tending to move the sets of rollers individUally into driving positions relative to the casing and the hub members.
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) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |