WO1989003947A1 - Apparatus for developing variable torque - Google Patents
Apparatus for developing variable torque Download PDFInfo
- Publication number
- WO1989003947A1 WO1989003947A1 PCT/NL1988/000041 NL8800041W WO8903947A1 WO 1989003947 A1 WO1989003947 A1 WO 1989003947A1 NL 8800041 W NL8800041 W NL 8800041W WO 8903947 A1 WO8903947 A1 WO 8903947A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- handle
- rotation
- axis
- drive
- drive means
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H21/00—Gearings comprising primarily only links or levers, with or without slides
- F16H21/10—Gearings comprising primarily only links or levers, with or without slides all movement being in, or parallel to, a single plane
- F16H21/12—Gearings comprising primarily only links or levers, with or without slides all movement being in, or parallel to, a single plane for conveying rotary motion
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
- G05G1/00—Controlling members, e.g. knobs or handles; Assemblies or arrangements thereof; Indicating position of controlling members
- G05G1/08—Controlling members for hand actuation by rotary movement, e.g. hand wheels
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
- G05G11/00—Manually-actuated control mechanisms provided with two or more controlling members co-operating with one single controlled member
Abstract
An apparatus for developing variable rotational drive torque which comprises an elongated handle adapted for rotation about a first axis, first drive means attached to the handle for rotation therewith and for directly developing drive torque about the first axis, means to disengage the first drive means from the handle and for permitting the handle to rotate about a second axis of rotation located between the first axis and the location of force application to the handle. Drive engagement means extends through the handle adjacent the second axis of rotation and is arranged and positioned for rotational engagement with at least a part of the first drive means when the handle is rotated about the second axis so as to transmit torque to the first drive means about the first axis of rotation. Means is provided to selectively vary the relative position of a portion of the drive engagement means in relation to the second axis of rotation to vary the torque transmitted to the first drive means and thereby developed about the first axis of rotation by the first drive means when the handle is rotated about the second axis of rotation.
Description
APPARATUS FOR DEVELOPING VARIABLE TORQUE
Technical Field
The invention relates to an apparatus for developing variable rotational drive torque. In particular, the invention relates to a handle for developing variable and selective drive torque for applying such torque to devices of all types which may require torque input.
Background Art
Devices for developing and transmitting torque either manually or mechanically are known. In its simplest form, such a device is in the form of a handle which simply attaches by appropriate attachment means to a device or mechanism having an input shaft or the like. One example is the standard handle which is used to drive a deck winch.
U.S. patent No. 4,546,676 to Kiefer, Jr. relates to a torque multiplying hand wrench which incorporates the features of a standard ratchet wrench along with a lever action torque multiplying feature. In this device, effective operation requires the use of two hands, one for the torque application arm and the other for the handle of the wrench. Also, this wrench is used in conjunction with a ratchet arrangement which inherently produces lost motion, depending upon the size of the ratchet teeth. Such lost motion deprives the ratchet of a sufficiently wide range of torque values.
U.S. patent No. 4,616,585 to Marcandalli relates to a device for providing for three sewing maching needle strokes. A limited form of drive eccentricity is achieved by a rotating pin inside a connecting rod component. However, this patent does not disclose a variable torque apparatus capable of developing torque over an extremely wide range. I have invented an apparatus which is capable of developing virtually an infinite number of rotational drive torque values by merely adjusting the apparatus in accordance with the desired leverage.
Summary of the Invention
An apparatus for developing variable rotational drive torque which comprises an elongated handle adapted for rotation about a first axis, first drive means attached to the handle for rotation therewith and for directly developing drive torque about the first axis, means to disengage the first drive means from the handle and for permitting the handle to rotate about a seconct axis of rotation located between the first axis and the location of force application to the handle, drive engagement means extending through the handle adjacent the second axis of rotation and arranged and positioned for rotational engagement with at least a part of the first drive means when the handle is rotated about the second axis so as to transmit torque to the first drive means about the first axis of rotation, and means to selectively vary the relative position of a portion of the drive engagement means in relation to the second axis of rotation to vary the torque transmitted to the first drive means and thereby developed about the first axis of rotation by the first drive means when the handle is rotated about the second axis of rotation.
In a preferred embodiment, the first drive means comprises a member positioned adjacent to the handle and extending at least over the portion of the handle
corresponding to the distance between the first and second axes of rotation. Also, the first drive means includes a drive portion adapted for rotation with the elongated handle about the first axis when the handle is rotated thereabout. Further, means is provided to selectively connect the handle with the first drive means for rotation about the first axis and to selectively disconnect the handle from direct rotation with the first drive means to permit the handle to rotate about the second axis.
Drive engagement means is provided in the form of a member variably eccentrically positioned with respect to the second axis of rotation, and the eccentrically positioned member is rotatable about the second axis when the handle rotates thereabout. The eccentrically positioned member thus rotationally engages at least a part of the first drive means to transmit torque thereto about the first axis in dependence upon the distance between the eccentrically positioned member and the second axis.
In the preferred apparatus the first drive means comprises a first elongated member positioned adjacent the handle for rotation therewith about the first axis of rotation, and an intermediate drive means is positioned between the handle and the first drive means in face-to- face relation therewith and adapted for rotation therewith about the first axis. The first drive means is adaptable for rotation relative to the intermediate drive means when the handle is disconnected from the intermediate drive means and rotated about the second axis. Means is provided for selectively connecting the handle for direct rotation with the intermediate drive means and the first drive means about the first axis and for disconnecting the handle from direct rotation with the intermediate drive
eans such that the handle rotates about the second axis and causes rotation of the first drive means about the first axis to develop torque thereabout in dependence upon the dimension between the eccentrically positioned member and the second axis of rotation.
In a preferred embodiment, the first drive means comprises an elongated drive member having a multi-sided drive means adjacent the first axis of rotation for rotationally driving a member having a correspondingly configured multi-sided mating portion. Means is provided to selectively vary the relative position of a portion of the drive engagement means in relation to the second axis of rotation comprising a shaft extending transversely through the handle and the first and intermediate drive means adjacent the second axis of rotation. An eccentric cam member is connected to the shaft and positioned for engagement with at least a portion of the first dri * means as the handle is rotated about the second *xi* Of rotation.
The first drive means defines a slotted portion for reception of the eccentric cam member, and a transversely extending shaft is fixed for rotation with the handle about the second axis so as to cause rotation of the eccentric cam member about the second axis whereby the cam member engages wall portions of the slotted portion of the first drive means to cause the first drive means to rotate in dependence upon the dimension between the eccentric cam means and the second axis of rotation. The transversely extending shaft comprises means for securing the relative rotational position of the shaft fixed with respect to the handle. Preferably, means for securing the transversely extending shaft in fixed rotational position relative to the handle position
comprises a knob having means on the surface thereof for fixing the relative rotational position of the knob and the handle. Further, first drive means comprises a membe extending over a portion of the length of the handle adjacent thereto and the intermediate drive means comprises an intermediate drive member positioned in respective face-to-face relation with the handle and the first drive means.
Furthermore, the preferred apparatus includes an elongated transverse generally cylindrical member which extends through the drive end portion of the first drive member and is fixed from rotation, and means is provided to selectively connect the intermediate drive member to the elongated transverse generally cylindrical member to rotationally fix the intermediate drive member thereto. Also, means is provided to connect the intermediate drive member for rotation with the handle and for selectively rotationally disconnecting the handle from the intermediate drive member so as to permit rotation of the handle when the intermediate drive member is fixed to the transverse generally cylindrical elongated member.
The means to disengage the first drive member from the handle preferably comprises a threaded member extending through the handle so as to be selectively engaged with the intermediate member so as to cause the intermediate member to rotate with the handle while the intermediate drive member and the elongated transverse generally cylindrical member to be rotationally disconnected from the first drive member. Means is provided to selectively rotationally connect the intermediate drive member to the elongated transverse generally cylindrical member which comprises a multi-sided disc movable within a correspondingly shaped aperture
defined in part by the elongated generally cylindrical transverse member and in part by the intermediate drive member adjacent thereto such that movement of-the disc so as to be wholly contained within the portion of the aperture of the elongated generally cylindrical transverse member will permit the intermediate drive member to rotate about the first axis and the elongated generally cylindrical transverse member, the multi-sided disc having means associated therewith to shift same to a position between the intermediate drive member and the elongated generally cylindrical transverse member to cause the intermediate drive member to be fixed from rotation with the elongated generally cylindrical transverse member. The disc is biased toward a position in engagement with correspondingly shaped portions of both the intermediate drive member and the elongated generally cylindrical transverse member so as to rotationally fix the intermediate drive member with the elongated generally cylindrical transverse member.
A shaft extends through the handle at t&β $rst axis, the shaft being threadedly engaged with corresponding threads provided in the handle and adapted to be threadedly advanced toward and away from the intermediate drive member. The threaded shaft has a knob connected at one end portion thereof to facilitate rotation of same so as to threadedly advance the shaft through the handle toward and away from the intermediate drive member for selectively connecting and disconnecting the handle rotationally with respect thereto. The end portion of the shaft includes means positioned for engagement and disengagement with a portion of the multi- sided disc when the shaft is threadedly advanced toward or away from the intermediate member.
The disc is a multi-sided disc member having resilient means to bias the disc to a position within the corresponding multi-sided aperture to engage multi-sided portions of the intermediate member and the elongated generally cylindrical fixed transverse member such that the intermediate member is normally fixed against rotation by the transverse member extending through the final drive member thereof thereby permitting the final drive member to rotate release thereto.
The apparatus of the present application essentially comprisesan elongated handle adapted for rotation about a first axis, first drive means attached to the handle for rotation therewith and for directly developing drive torque about the axis, an intermediate drive means positioned between the final drive means and the handle and adapted to be selectively connected for rotation with the handle and to be selectively disconnected from rotation with the handle so as to facilitate rotation of the handle about a second axis of rotation, and means to vary the torque developed at the first drive means when the handle is rotated about the second axis.
Brief Description of the Drawings
Further benefits and advantages of the invention will become apparent from a consideration of the following description given with reference to the accompanying drawings figures which specify and show preferred embodiments of the invention and wherein:
FIG. 1 is a perspective view with parts separated, for convenience of illustration, of the apparatus for developing variable rotational drive torque according to the present invention;
FIG. 2 is a top view illustrating the apparatus in both rotational modes;
FIG. 3 is a view partially in cross-section taken along lines 3-3 of FIG. 2 illustrating the assembled components of the apparatus in the offset rotational mode;
FIG. 4 is a view partially in cross-section similar to FIG. 3 but illustrating the apparatus in the main rotational mode; and
FIG. 5 is a top view of the final drive member illustrating the oscillatory movements of that member when the handle is rotated in the offset rotational mode.
Detailed Description of the Preferred Embodiments
Referring to the drawings it will be seen that the operational objective of the apparatus is to ots fe the handle 10 manually in order to ultimately* rotate the drive end 12 shown in the drawing as a square drive section. According to the invention, this rotation of the square drive section 12 is accomplished according to two separate modes in which the handle rotates as will be described hereinbelow. The first mode is a direct drive mode in which the handle is rotated in a one-to-one relation with the drive end 12, whereas the second drive mode provides full or incremental rotations of the handle and the drive end 12.
The handle 10 is rotatable manually by gripping knob 11 about either of two axes, a first (and main) axis 14, and a second (or offset) axis 16 shown more clearly in
Figs. 3 and 4. Both modes are illustrated in Fig. 2 with the first mode shown in the upper position and the second - or offset - mode shown in the lower position.
5 Final drive member 18 is positioned opposite the handle with an intermediate drive member 20 being positioned between the final drive member 18 and the handle 10. A sleeve 22 is fixed from rotation at the drive end and extends through an opening in the final ■jQ drive member 18 as shown more clearly in Figs. 3 and 4, so that the final drive member may rotate about this sleeve 22.
Conversion of the handle for rotation from one
15 mode to the other will now be described. An octagonal shaped disc 24 is positioned within a correspondingly shaped recess 26 provided within the sleeve 22, so that when the disc assumes a position straddling the sleeve and the intermediate drive member 20 by the bias force of spring 28 as shown more clearly in Fig. 3, the 0 intermediate drive member 20 and the sleeve are then fixed from relative rotation. In this mode, rotation of handle 10 takes place about the offset axis 16 best shown in Figs. 3 and 4, so that there is relative rotation between handle 10 and the intermediate drive member 20. 5
Threaded shaft 30 has a disc-like member 32 at one end and is fixed for rotation with knob 50 by set screw 52. Rotation of knob 50 causes disc 32 to move toward and away from engagement with neck 34 extending 0 from octagonal disc 24. The octagonal disc 24 may be forced to enter fully, the correspondingly shaped recess 26 in the sleeve 22 as shown in Fig. 4 by tightening down threaded shaft 30 so that the disc-shaped head 32 enters a corresponding disc shaped aperture 36 in the intermediate 5
drive member 20 and engages the neck 34 forcing disc 24 to the position shown in Fig. 4. In this mode, handle 10 is locked for rotation with intermediate drive member 20 and final drive member 18 and rotation of the handle 10 occurs about the main axis 12 so that both final drive member 18 and intermediate drive member 20 each rotate with the handle 10 as a single unit.
A shaft 36 extends through the handle and the drive members as shown and has a cam member 38 at one end which is offset from the offset axis 16 and which is adapted for manual rotation to various selectable locked positions by rotation of a knob 40 attached to the shaft 36. Offset cam member 38 is positioned within a slot-like aperture 42 in the final drive member 18 and may assume an infinite number of rotational positions as shaft 36 is rotated by hand with knob 40. Rotational positions of the cam member 38 are first selected by turning the knob 40 connected to shaft 36 and when a predetermined desired position of the cam member 38' is achieved, the position is locked by permitting the arcuate toothed locking member 44 of lever 45, which pivots about pin 47, to engage the teeth 46 on the knob 40 by the force of spring 48 acting against stationary plate member 54.
In operation, when shaft 30 is threadedly rotated inwardly by rotating knob 38, disc 32 enters the corresponding aperture 36 in intermediate drive member 20 and engages neck 34 of disc 24 causing octagonal disc 18 to enter recess 26 while handle 10 becomes securely fixed- for rotation along with final drive member 18 and intermediate drive member 20. Thus, rotation of handle 10 causes direct one-to-one rotation of final drive member 18. Since the sleeve 22 is fixed against rotation by a stationary square pin 56 positioned in a corresponding
square opening in sleeve 22 (shown in Fig. 4) , final driv member 18 actually rotates about sleeve 22 in. one-to-one relation with the handle, while the square drive end 12 o the final drive member 18 produces the desired rotation o a clutch or other member to be driven.
Turning to the second drive mode of the apparatus, when knob 50 is rotated counterclockwise to cause threaded member 30 and disc 32 to move upwardly int handle 10, disc 32 moves upwardly through the bias of the coil spring 28 so as to assume a position straddling the final drive member 18 and intermediate drive member 20 so as to fix intermediate drive member 20 with stationary sleeve 22. Since sleeve 22 is fixed from rotation, intermediate drive member 20 is thus fixed from rotation. After sufficient unthreading of- ember 30, the disc 32 enters aperture 29 in handle 10 as shown in Fig. 3. Thereafter, rotation of handle 10 is shifted to axis 16, while handle 10 actually rotates relative to the intermediate drive member 20 which is now fixed to sleeve 22 by the position of disc 24. Depending upon the orientation of the cam member 38 within the slot-like aperture 42 in the final drive member 18, the final drive member will oscillate about axis 16 due to the rotation of the shaft 36 along with handle 10. In either case, whether the handle 10 is rotated partial or full turns, the final drive member will oscillate due to the engagement of the cam member 30 with the sides of the slot-like aperture 42 in final drive member 18.
In the preferred application as described, and as shown in the Figs. , the final drive member 18 is actually used to rotate a hyperboloidal-type clutch in a winch in which rotational driving takes place in one direction and the clutch free wheels in the opposite
direction. A second clutch provides braking action to maintain the advanced rotated position of the. final drive member 18. Thus, the oscillatory motion of final drive member 18 is provided when the handle 10 is rotated a full circle or when it is rotated partial circles in an oscillating fashion. Either motion produces the desired advancement of the final drive member- 20 and this motion makes it particularly suitable for use with a winch on a sailboat or other environment where space is limited. In fact, the amplitude of the oscillatory motion of final drive member 18 and the rotational torque provided are dependent upon the actual offset angular orientation of the cam member 38 with respect to the final drive member 18. Thus, a greater amount of offset distance "X" shown in Figs. 3 and 4, between the center of cam 30 and axis 16, will create a greater amount of rotational metiofi St final drive member 18, while a lesser offset distances -for cam 38 will create a lesser amount of rotational motion at final drive member 18. However, this last mentiølιi«ι condition will also create a greater torque multiplication due to the lesser lever cam defined by distance "X". When the offset cam 38 is unlocked and rotated in the direction where "X* tends toward zero, the torque developed at the drive end of final drive member 18 increases and the amplitude of the oscillatory motion of final drive 18 approaches zero. To summarize, as dimension "X" approaches zero, the torque multiplication increases and the amplitude of intermediate drive member 20 decreases. When dimension mX" is precisely zero, no rotation occurs at final drive member 20 and the torque is reduced to zero.
Claims
1. Apparatus for developing variable rotational drive torque which comprises:
^0 a. an elongated handle adapted for rotation about a first axis;
b. first drive means attached to said handle for rotation therewith and for directly
15 developing drive torque about said first axis;
c. means to disengage said first drive means from said handle and for permitting said
20 handle to rotate about a second axis of rotation located between said first axis and the location of force application to said handle;
25 d. drive engagement means extending through said handle adjacent said second axis of rotation and arranged and positioned for rotational engagement with at least a part of said first drive means when said handle is rotated about said second axis so as to
30 transmit torque to said first drive means about said first axis of rotation; and
e. means to selectively vary the relative position of a portion of said drive
35 engagement means in relation to said second
- axis of rotation to vary the torque transmitted to said first drive means and thereby developed about said first axis of rotation by said first drive means when said handle is rotated about said second axis of rotation.
2. The apparatus according to claim 1 wherein said first drive means comprises a member positioned adjacent to said handle and extending at least over the portion of said handle corresponding to the distance between said first and second axes of rotation.
3. The apparatus according to claim 2 wherein said first drive means includes a drive portion adapted - for rotation with said elongated handle about said first axis when said handle is rotated thereabout.
4. The apparatus according to claim 3 further comprising means to selectively connect said handle with said first drive means for rotation about said first axis and to selectively disconnect said handle from diredt rotation with said first drive means to permit said handle to rotate about said second axis.
5. The apparatus according to claim 4 wherein said drive engagement means comprises a member variably eccentrically positioned with respect to said second axis of rotation, said eccentrically positioned member rotatable about said second axis when said handle rotates thereabout such that said eccentrically positioned member rotationally engages at least a part of said first drive means to transmit torque thereto about said first axis in dependence upon said distance between said eccentrically positioned member and said second axis.
6. The apparatus according to claim 5 wherein:
a. said first drive means comprises a first elongated member positioned adjacent said
5 handle for rotation therewith about said first axis of rotation;
b. an intermediate drive means is positioned between said handle and said first drive
10 means in face-to-face relation therewith and adapted for rotation therewith about said first axis, said first drive means being adaptable for rotation relative to said intermediate drive means when said handle is
15 disconnected from said intermediate drive means and rotated about said second axis; and
means is provided for selectively connecting said handle for direct rotation with said
20 intermediate drive means and said first drive means about said first axis and for disconnecting said handle from direct rotation with said intermediate drive means such that said handle rotates about said
25 second axis and causes rotation of said first drive means about said first axis to develop torque thereabout in dependence upon the dimension between said eccentrically positioned member and said second axis of
30 rotation.
35
7. The apparatus according to claim 6 wherein said first drive means comprises an elongated drive member having a multi-sided drive means adjacent said first axis of rotation for rotationally driving a member having a correspondingly configured multi-sided mating portion.
8. The apparatus according to claim 7 wherein said means to selectively vary the relative position of a portion of said drive engagement means in relation to said second axis of rotation comprises a shaft extending transversely through said handle and said first and intermediate drive means adjacent said second axis of rotation and an eccentric cam member is connected to said shaft and positioned for engagement with at least a portion of said first drive means as said handle is rotated about said second axis of rotation.
9. The apparatus according to claim 8 wherein said first drive means defines a slotted portion to reception of said eccentric cam member, a transversely extending shaft is fixed for rotation with said handle about said, second axis so as to cause rotation of said eccentric cam member about said second axis whereby said cam member engages wall portions of said slotted portion of said first drive means to cause said first drive means to rotate in dependence upon said dimension between said eccentric cam means and said second axis of rotation.
10. The apparatus according to claim 9 wherein said transversely extending shaft comprises means for securing the relative rotational position of said shaft fixed with respect to said handle.
11. The apparatus according to claim 10 wherein said means for securing said transversely extending shaft in fixed rotational position relative to said.handle position comprises a knob having means on the surface
5 thereof for fixing the relative rotational position of said knob and said handle.
12. The apparatus according to claim 11 wherein said first drive means comprises a member extending over a ø portion of the length of said handle adjacent thereto and said intermediate drive means comprises an intermediate drive member positioned in respective face-to-face relation with said handle and said first drive means.
5 13. The apparatus according to claim 12 wherein:
a. an elongated transverse generally cylindrical member extends through the drive 0 end portion of said first drive member and is fixed from rotation; and
b. means is provided to selectively connect said intermediate drive member to said elongated transverse generally cylindrical 5 member to rotationally fix said intermediate drive member thereto; and
c. means is provided to connect said 0 intermediate drive member for rotation with said handle and for selectively rotationally disconnecting said handle from said intermediate drive member so as to permit rotation of said handle when said . 5 intermediate drive member is fixed to said transverse generally cylindrical elongated member.
14. The apparatus according to claim 13 wherein said means to disengage said first drive member from said handle comprises a threaded member extending through said handle so as to be selectively engaged with said intermediate member so as to cause said intermediate member to rotate with said handle while said intermediate drive member and said elongated transverse generally cylindrical member to be rotationally disconnected from said first drive member.
15. The apparatus according to claim 14 furthe comprising means to selectively rotationally connect said intermediate drive member to said elongated transverse generally cylindrical member comprises a multi-sided disc movable within a correspondingly shaped aperture defined in part by said elongated generally cylindrical transvers member and in part by said intermediate drive member adjacent thereto such that movement of said disc so as to be wholly contained within the portion of said aperture o said elongated generally cylindrical' transverse member will permit said intermediate drive member to rotate abou said first axis and said elongated generally cylindrical transverse member, said multi-sided disc having means associated therewith to shift same to a position between said intermediate drive member and said elongated generally cylindrical transverse member to cause said intermediate drive member to be fixed from rotation with said elongated generally cylindrical transverse member.
16. The apparatus according to claim 15 wherei said disc is biased toward a position in engagement with correspondingly shaped portions of both said intermediate drive member and said elongated generally cylindrical
5 transverse member so as to rotationally fix said intermediate drive member with said elongated generally cylindrical transverse member.
17. The apparatus according to claim 16 furthe Q comprising a shaft extending through said handle at said first axis, said shaft being threadedly engaged with corresponding threads provided in said handle and adapted to be threadedly advanced toward and away from said intermediate drive member. 5
18. The apparatus according to claim 17 wherei said threaded shaft has a knob connected at one end portion thereof to facilitate rotation of same so as to threadedly advance said shaft through said handle toward 0 and away from said intermediate drive member for selectively connecting and disconnecting said handle rotationally with respect thereto.
19. The apparatus according to claim 18 wherein 5 the end portion of said shaft includes means positioned for engagement and disengagement with a portion of said multi-sided disc when said shaft is threadedly advanced toward or away from said intermediate member.
0 20. The apparatus according to claim 17 wherein said disc is a multi-sided disc member having resilient means to bias said disc to a position within said corresponding multi-sided aperture to engage multi-sided portions of said intermediate member and said elongated generally cylindrical fixed transverse member such that 5 said intermediate member is normally fixed against rotation by said transverse member extending through the final drive member thereof thereby permitting, said final drive member to rotate release thereto.
21. An apparatus for developing variable rotational drive torque which comprises:
a. an elongated handle adapted for rotation about a first axis;
b. first drive means attached to said handle - for rotation therewith and for directly developing drive torque about said axis;
c. an intermediate drive means positioned/ between said final drive means and said handle and adapted to be selectively connected for rotation with said handle and to be selectively disconnected from rotation with said handle so as to facilitate rotation of said handle about a second axis of rotation; and
d. means to vary the torque developed at said first drive means when said handle is rotated about said second axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019890701135A KR890701924A (en) | 1987-10-22 | 1988-10-19 | Variable torque deployment |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US11220187A | 1987-10-22 | 1987-10-22 | |
| US112,201 | 1987-10-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1989003947A1 true WO1989003947A1 (en) | 1989-05-05 |
Family
ID=22342618
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/NL1988/000041 WO1989003947A1 (en) | 1987-10-22 | 1988-10-19 | Apparatus for developing variable torque |
Country Status (3)
| Country | Link |
|---|---|
| KR (1) | KR890701924A (en) |
| AU (1) | AU2544988A (en) |
| WO (1) | WO1989003947A1 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2725772A (en) * | 1954-06-11 | 1955-12-06 | Arthur P Stone | Single pivoted pawl reversible ratchet wrench |
| US3463038A (en) * | 1967-06-01 | 1969-08-26 | Louis C Scull | Actuation gear for a ratchet wrench |
| US4377955A (en) * | 1979-10-10 | 1983-03-29 | Paul-Heinz Wagner | Screw spanner or wrench |
| US4562757A (en) * | 1983-03-14 | 1986-01-07 | James Furey | High torque expandable socket ratchet wrench |
-
1988
- 1988-10-19 KR KR1019890701135A patent/KR890701924A/en not_active Application Discontinuation
- 1988-10-19 AU AU25449/88A patent/AU2544988A/en not_active Abandoned
- 1988-10-19 WO PCT/NL1988/000041 patent/WO1989003947A1/en unknown
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2725772A (en) * | 1954-06-11 | 1955-12-06 | Arthur P Stone | Single pivoted pawl reversible ratchet wrench |
| US3463038A (en) * | 1967-06-01 | 1969-08-26 | Louis C Scull | Actuation gear for a ratchet wrench |
| US4377955A (en) * | 1979-10-10 | 1983-03-29 | Paul-Heinz Wagner | Screw spanner or wrench |
| US4562757A (en) * | 1983-03-14 | 1986-01-07 | James Furey | High torque expandable socket ratchet wrench |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2544988A (en) | 1989-05-23 |
| KR890701924A (en) | 1989-12-22 |
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