CA1294459C - Gearless transmission - Google Patents
Gearless transmissionInfo
- Publication number
- CA1294459C CA1294459C CA000614459A CA614459A CA1294459C CA 1294459 C CA1294459 C CA 1294459C CA 000614459 A CA000614459 A CA 000614459A CA 614459 A CA614459 A CA 614459A CA 1294459 C CA1294459 C CA 1294459C
- Authority
- CA
- Canada
- Prior art keywords
- transmission
- shaft
- relation
- set forth
- wind guide
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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
- F16H21/14—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 by means of cranks, eccentrics, or like members fixed to one rotary member and guided along tracks on the other
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gear Transmission (AREA)
Abstract
GEARLESS TRANSMISSION
ABSTRACT
A gearless transmission provides synchronous back-lash-free, reversible power transfer between three or more parallel shafts having non-aligned rotational axes. A
preferred embodiment for use with a hoist drive incorporates four such working shafts, one of which is driven by a drive motor, the transmission incorporating a synchronizing plate, each shaft having a cable winding drum mounted thereon. The transmission includes a cable level wind guide, permitting a side take-off, such that, in use as a hoisting mechanism, the hoist drive may be located at any preferred location. This in turn enables the provision of a substantially vibration free elevator service, and the capability of avoiding the requirement for a penthouse power room.
ABSTRACT
A gearless transmission provides synchronous back-lash-free, reversible power transfer between three or more parallel shafts having non-aligned rotational axes. A
preferred embodiment for use with a hoist drive incorporates four such working shafts, one of which is driven by a drive motor, the transmission incorporating a synchronizing plate, each shaft having a cable winding drum mounted thereon. The transmission includes a cable level wind guide, permitting a side take-off, such that, in use as a hoisting mechanism, the hoist drive may be located at any preferred location. This in turn enables the provision of a substantially vibration free elevator service, and the capability of avoiding the requirement for a penthouse power room.
Description
GEARLESS TRANSMISSION
FIELD OF THE INVENTION
This invention is directed to a gearless transmission and to a power transfer system. The system is of particular utility in the hoisting field.
BACKGROUND TO THE INVENTION
Hoist systems are frequently used wherein a plurality of shaft drlven winding drums carry the cable by which the platforms or cars are raised and lowered. The required synchronization of drive shaft rotations is provided by a geared t~ransmisslon, having a series of gears in meshing relation connecting the respective shafts.
Such prior art arrangements suffer from a number of disadvantages. Gears inherently generate vibration and, due to the provlsion of necessary tooth clearances, restrictions on tooth profiIes and~the occurrence of wear, almost inevitably develop signlflcant backlash. This adds to the generation of friction and noise, while reducing the efficiency of the system.
Owing to the limits~imposed by the cable fleet angle, that is, the angle at which a~cable~is wound upon a drum, it is; customary in many instances to install the hoisting machinery and cable drums in a penthouse or machine room, at the head of the elevator shaft. This necessitates mounting the gear devices in a fashion such that vibration therefrom~ lS transmitted to the structural steelwork of the shaft and is fre~uently~ heard~ on many floors of the building .
:
- : , .. .
.
. , . . ~ ~ , , . - ~, ' '.' ', ' :, ; . .
~ . ' . ' 4~9 as an objectionable noise and/or vibration.
Certain aspects of prlor art gearless transmissi.ons are to be found in the following listed United States patents; 327,741 Oct. 1880 True; 2,003,317 June 1935 Strandgren; 3,443,083 March 1969 Pope et al; 3,791,170 Feb.
1974 Schmidt; 4,072,061 Feb. 1978 Caflisch.
SUMMARY OF THE INVENTION
In accordance with the present invention there is provided a gearless, multi-shaft synchronized transmission using a displaceable force transfer plate in orbital force transfer, synchronizing relation between the plurality of shafts.
In order to avoid the possibility of jamming of the transmission, or the creation of instability in the operation of the transmission it lS necessary for the use of at least three such shafts, the shafts being mutually parallel in side by side misaligned relation, such that the respective polar axes do not all lie in a common plane.
The present invention thus provides at least three working shafts, one of which is externally driven, the remaining shafts of the device being driven by a force transfer plate. ~ ~
Thus there is provided a gearless transmission having at least three parallel working shafts rotatably mounted in bearings, for rotatlon in working relation about their respective p~olar a~xis; each shaft having offset connection means located adiacent one end of the ,' transmission, the connection means each having an axle exten-ding therefrom, projecting beyond the adjacent shaft end, being parallel with and offset from the respective shaft axis; a drive plate extending substantially normally to the polar axes of the shafts and carrying at least three rotary bearings, each bearing being connected in force transfer relation with a respective axle; and, drive means connected in force transfer relation with a shaft in rotational rela-tion therewith, whereby in use, operation of the drive means in force transfer rotational relation with that shaft pro-duces orbital displacement of the drive plate about the respective offset axles, and rotation of the working shafts in mutually synchronized rotational relation.
In a preferred arrangement four such working shafts are provided in mutually parallel, laterally spaced relation, grouped about an axis located therebetween, with the drive means connected in force transfer relation with a selected one of the four shaft.
It will be appreciated that the drive means connec-ted in rotational driving relation may comprise any suitabletorque transmitting agency connectable with the selected shaft.
In the preferred embodiment a motor having a rotary output shaft has that shaft directly connected in rotational torque transfer relation with the selected shaft.
In many instances the drive means comprises an electric motor.
. .
-. .. . . . . . ... .
. .
?4~
In the case of a hoisting mechanism the rotatable shafts are each provided with a drum portion to receive a cable in wound relation thereon.
Reference hereinafter may be made to shafts having a cable wound thereon. Such reference generally imputes the provision of a drum portion upon the shaft by which to receive the cable, in a taking-up and paying-out relation.
In the above recited four shaft arrangement, in use each shaft has a cable wound thereon.
In one embodiment a level wind guide means is located between the working shafts for axial displacement relative thereto in cable guiding relation with the respective shafts.
The level wind guide means has a plurality of guide sheaves mounted thereon in mutually spaced relation thereabout, and shaft means supporting the level wind guide means between the working shafts for displacement along the shaft means parallel wlth the worklng shafts.
The wind guide supporting shaft means is rotatable, ~0 being in threaded relation with a nut portion of the level wind guide means, to selectlvely drive the wind guide means in controlled axial displacement along its supporting shaft.
In a side delivery embodiment of the invention the wind guide means incorporates a plurality of sheaves, one for each working shaft, to receive a cable in axial positioned relation, relative to a respective working shaft. The pulleys are arranged by mountlng on the level wlnd guide means to provide an off-going and on-coming cable guide : - 4 -:: :
. . .
, :
- ~2~4~9 directed axially of the transmission. For that purpose cable passage means are provided through the axial end structure portions of the transmission, at one end thereof. ~o that end, a centre portion of the drive plate is removed, to permit unrestricted passage for the cables therethrough.
In one embodiment at least one of the offset connection (crank) means may be provided with a counter balance weight extending outwardly therefrom in at least partial balancing relation with unbalanced portions of the transmission. In a preferred embodiment, in addition to balancing the out-of-balance mass of each of the cranks and its related axle portion, an additional balance mass may be provided, to at least partially off-set the out-of-balance mass of the drive plate. This provision may be used to further enhance the fly wheel effect provided by the drive plate.
BRIEF DESCRIPTION OF THE DRAWINGS
Certain embodiments of the present invention are ~0 described by way of illustration, without limitation of the invention thereto, reference being made to the accompanying drawings, wherein;
Figure 1 is a schematic plan view of a 4-shaft gearless transmission in accordance with the present invention;
Figure 2 is a front elevation of the Figure arrangement;
... ~ `:
, Figure 3 appears with Figure 7, and is a schematic perspective view, partially in phantom of a 3-shaft gearless transmission;
Figure 4 is a schematic plan view taken at the mid section, as at 4-4 of Figure 2, showing further detail of a hoist embodiment;
Figure 5 is a front end elevation of the Figure 4 embodiment;
Figure 6 is an enlarged view taken at 5-5 of Figure 4; and, Figure 7 is an enlarged side elevation of a shaft end detail.
DETAILED DESCRIPTION OF THE INVENTION
Referring to Figure 1 and 2, the gearless transmission 10 has four shafts 12 rotatably supported by bearings 14 betwe:en end plate 16, 18.
Referr1ng also to the Figure 3 embodiment 20, this is illustrated as having three shafts 12 in bearings 14, with end plates 22, 24.
:Each shaft 12 has an offset axle portion 26 each in radially offset relation from the respective shaft axis 28.
The offset axis of axle portion 26 relative to the shaft axis 28 constitutes in effect a crank portion, from which the axle 25 26 extends. The axle portions 26 engage bearings 27 of drive plate 29 :(shown in phantom in Figure 3, and shown in full line in Figure 7).
.
: - 6 -.
, Referring to the Figures 5 and 7 embodiment, it will be seen that each shaft 12 supports a ~rum 30.
The outer end 32 o~ each shaft 12 has a crank member 34 from which an axle 26 extends, to engage the respective bearing 27 of drive plate 29.
An aperture 38 in drive plate 29, and apertures 40 in end plate 18, in the Figure 7 embodiment, permit the endwise, axial passage of wire ropes 42 from off the respective drums 30, in winding and unwinding relation, by way of the level wind guide means 44.
Referring to Figure 6, the level wind guide means 44 comprises a body 46 having four adjoining lobe portions, with sheaves 48 rotatably mounted therebetween, in guiding relation with wire ropes 42.
1~ A centrally located hollow nut portion 50 is internally threaded, to receive a lead screw 52 (Figure 4) in driving relation therewith. Rotation of the lead screw 52 serves to displace wire gui.de means 44 and its guide sheaves 48 axially in predetermined relation within the transmission 10.
A reversible motor 54 connects in rotational driving relation with one of the shafts 12. Intermediate reduction gears 56, 58 connect the drive motor 54 with the lead screw 54 of the level wind guide means 44.
The horizontally extending wire ropes, of the Figures 4 through 7 embodiments, may be trained about intermediate guide sheaves, external to the transmission 10, to hoist a cage or perform other useful work.
~.2~3~4~9 In operation, with the wire cables 42 carrying a tensile load, operation of the motor 54 in an in-winding sense produces rotation of shaft 12 and lead screw 52.
The rotation of the driven shaft 12 displaces drive plate 29, by way of the respective offset axle portion 26, to move the plate 29 in an orbital rotation of fixed orientation, The orbital rotation of plate 29 drives the remaining three shafts 12 in precisely synchronized, in-phase relation with the motor driven shaft 12.
The drum portions 30, having wire ropes 42 wound thereon, rotate in synchronized relation, to wind-on or pay-out the ropes 42, in accordance with the direction of rotation of motor 54. The orderly winding of the ropes 42 is controlled by the synchronized axial displacement of the level wind guide means 44, which feeds the wire ropes 42 in precisely controlled relation on and off the drums 30, by the precise axial placement of sheaves 48.
The transmission is usually set up to provide a wire rope fleet angle substantially of zero. That is to say, the wire ropes extend tangentially from their respective drums, and in a plane or planes normal to the main axes of the drums.
In the absence of load transfer gears, the mechanism operates substantially with no backlash, with little noise and a-t high efficiency.
The inherent out-of-balance of the orbital drive plate 29 may be counterbalanced, at least in part, by balance masses 39, secured to and forming part of the cranks 34.
:
. . .
s9 It will be understood that the subject transmission has a wide utility, and that the illustrated winding mechanisms may be used in more orthodox fashion, with the direct wire rope attachment, between load and drum, in accordance with the invention.
- _ g _ ' - -
FIELD OF THE INVENTION
This invention is directed to a gearless transmission and to a power transfer system. The system is of particular utility in the hoisting field.
BACKGROUND TO THE INVENTION
Hoist systems are frequently used wherein a plurality of shaft drlven winding drums carry the cable by which the platforms or cars are raised and lowered. The required synchronization of drive shaft rotations is provided by a geared t~ransmisslon, having a series of gears in meshing relation connecting the respective shafts.
Such prior art arrangements suffer from a number of disadvantages. Gears inherently generate vibration and, due to the provlsion of necessary tooth clearances, restrictions on tooth profiIes and~the occurrence of wear, almost inevitably develop signlflcant backlash. This adds to the generation of friction and noise, while reducing the efficiency of the system.
Owing to the limits~imposed by the cable fleet angle, that is, the angle at which a~cable~is wound upon a drum, it is; customary in many instances to install the hoisting machinery and cable drums in a penthouse or machine room, at the head of the elevator shaft. This necessitates mounting the gear devices in a fashion such that vibration therefrom~ lS transmitted to the structural steelwork of the shaft and is fre~uently~ heard~ on many floors of the building .
:
- : , .. .
.
. , . . ~ ~ , , . - ~, ' '.' ', ' :, ; . .
~ . ' . ' 4~9 as an objectionable noise and/or vibration.
Certain aspects of prlor art gearless transmissi.ons are to be found in the following listed United States patents; 327,741 Oct. 1880 True; 2,003,317 June 1935 Strandgren; 3,443,083 March 1969 Pope et al; 3,791,170 Feb.
1974 Schmidt; 4,072,061 Feb. 1978 Caflisch.
SUMMARY OF THE INVENTION
In accordance with the present invention there is provided a gearless, multi-shaft synchronized transmission using a displaceable force transfer plate in orbital force transfer, synchronizing relation between the plurality of shafts.
In order to avoid the possibility of jamming of the transmission, or the creation of instability in the operation of the transmission it lS necessary for the use of at least three such shafts, the shafts being mutually parallel in side by side misaligned relation, such that the respective polar axes do not all lie in a common plane.
The present invention thus provides at least three working shafts, one of which is externally driven, the remaining shafts of the device being driven by a force transfer plate. ~ ~
Thus there is provided a gearless transmission having at least three parallel working shafts rotatably mounted in bearings, for rotatlon in working relation about their respective p~olar a~xis; each shaft having offset connection means located adiacent one end of the ,' transmission, the connection means each having an axle exten-ding therefrom, projecting beyond the adjacent shaft end, being parallel with and offset from the respective shaft axis; a drive plate extending substantially normally to the polar axes of the shafts and carrying at least three rotary bearings, each bearing being connected in force transfer relation with a respective axle; and, drive means connected in force transfer relation with a shaft in rotational rela-tion therewith, whereby in use, operation of the drive means in force transfer rotational relation with that shaft pro-duces orbital displacement of the drive plate about the respective offset axles, and rotation of the working shafts in mutually synchronized rotational relation.
In a preferred arrangement four such working shafts are provided in mutually parallel, laterally spaced relation, grouped about an axis located therebetween, with the drive means connected in force transfer relation with a selected one of the four shaft.
It will be appreciated that the drive means connec-ted in rotational driving relation may comprise any suitabletorque transmitting agency connectable with the selected shaft.
In the preferred embodiment a motor having a rotary output shaft has that shaft directly connected in rotational torque transfer relation with the selected shaft.
In many instances the drive means comprises an electric motor.
. .
-. .. . . . . . ... .
. .
?4~
In the case of a hoisting mechanism the rotatable shafts are each provided with a drum portion to receive a cable in wound relation thereon.
Reference hereinafter may be made to shafts having a cable wound thereon. Such reference generally imputes the provision of a drum portion upon the shaft by which to receive the cable, in a taking-up and paying-out relation.
In the above recited four shaft arrangement, in use each shaft has a cable wound thereon.
In one embodiment a level wind guide means is located between the working shafts for axial displacement relative thereto in cable guiding relation with the respective shafts.
The level wind guide means has a plurality of guide sheaves mounted thereon in mutually spaced relation thereabout, and shaft means supporting the level wind guide means between the working shafts for displacement along the shaft means parallel wlth the worklng shafts.
The wind guide supporting shaft means is rotatable, ~0 being in threaded relation with a nut portion of the level wind guide means, to selectlvely drive the wind guide means in controlled axial displacement along its supporting shaft.
In a side delivery embodiment of the invention the wind guide means incorporates a plurality of sheaves, one for each working shaft, to receive a cable in axial positioned relation, relative to a respective working shaft. The pulleys are arranged by mountlng on the level wlnd guide means to provide an off-going and on-coming cable guide : - 4 -:: :
. . .
, :
- ~2~4~9 directed axially of the transmission. For that purpose cable passage means are provided through the axial end structure portions of the transmission, at one end thereof. ~o that end, a centre portion of the drive plate is removed, to permit unrestricted passage for the cables therethrough.
In one embodiment at least one of the offset connection (crank) means may be provided with a counter balance weight extending outwardly therefrom in at least partial balancing relation with unbalanced portions of the transmission. In a preferred embodiment, in addition to balancing the out-of-balance mass of each of the cranks and its related axle portion, an additional balance mass may be provided, to at least partially off-set the out-of-balance mass of the drive plate. This provision may be used to further enhance the fly wheel effect provided by the drive plate.
BRIEF DESCRIPTION OF THE DRAWINGS
Certain embodiments of the present invention are ~0 described by way of illustration, without limitation of the invention thereto, reference being made to the accompanying drawings, wherein;
Figure 1 is a schematic plan view of a 4-shaft gearless transmission in accordance with the present invention;
Figure 2 is a front elevation of the Figure arrangement;
... ~ `:
, Figure 3 appears with Figure 7, and is a schematic perspective view, partially in phantom of a 3-shaft gearless transmission;
Figure 4 is a schematic plan view taken at the mid section, as at 4-4 of Figure 2, showing further detail of a hoist embodiment;
Figure 5 is a front end elevation of the Figure 4 embodiment;
Figure 6 is an enlarged view taken at 5-5 of Figure 4; and, Figure 7 is an enlarged side elevation of a shaft end detail.
DETAILED DESCRIPTION OF THE INVENTION
Referring to Figure 1 and 2, the gearless transmission 10 has four shafts 12 rotatably supported by bearings 14 betwe:en end plate 16, 18.
Referr1ng also to the Figure 3 embodiment 20, this is illustrated as having three shafts 12 in bearings 14, with end plates 22, 24.
:Each shaft 12 has an offset axle portion 26 each in radially offset relation from the respective shaft axis 28.
The offset axis of axle portion 26 relative to the shaft axis 28 constitutes in effect a crank portion, from which the axle 25 26 extends. The axle portions 26 engage bearings 27 of drive plate 29 :(shown in phantom in Figure 3, and shown in full line in Figure 7).
.
: - 6 -.
, Referring to the Figures 5 and 7 embodiment, it will be seen that each shaft 12 supports a ~rum 30.
The outer end 32 o~ each shaft 12 has a crank member 34 from which an axle 26 extends, to engage the respective bearing 27 of drive plate 29.
An aperture 38 in drive plate 29, and apertures 40 in end plate 18, in the Figure 7 embodiment, permit the endwise, axial passage of wire ropes 42 from off the respective drums 30, in winding and unwinding relation, by way of the level wind guide means 44.
Referring to Figure 6, the level wind guide means 44 comprises a body 46 having four adjoining lobe portions, with sheaves 48 rotatably mounted therebetween, in guiding relation with wire ropes 42.
1~ A centrally located hollow nut portion 50 is internally threaded, to receive a lead screw 52 (Figure 4) in driving relation therewith. Rotation of the lead screw 52 serves to displace wire gui.de means 44 and its guide sheaves 48 axially in predetermined relation within the transmission 10.
A reversible motor 54 connects in rotational driving relation with one of the shafts 12. Intermediate reduction gears 56, 58 connect the drive motor 54 with the lead screw 54 of the level wind guide means 44.
The horizontally extending wire ropes, of the Figures 4 through 7 embodiments, may be trained about intermediate guide sheaves, external to the transmission 10, to hoist a cage or perform other useful work.
~.2~3~4~9 In operation, with the wire cables 42 carrying a tensile load, operation of the motor 54 in an in-winding sense produces rotation of shaft 12 and lead screw 52.
The rotation of the driven shaft 12 displaces drive plate 29, by way of the respective offset axle portion 26, to move the plate 29 in an orbital rotation of fixed orientation, The orbital rotation of plate 29 drives the remaining three shafts 12 in precisely synchronized, in-phase relation with the motor driven shaft 12.
The drum portions 30, having wire ropes 42 wound thereon, rotate in synchronized relation, to wind-on or pay-out the ropes 42, in accordance with the direction of rotation of motor 54. The orderly winding of the ropes 42 is controlled by the synchronized axial displacement of the level wind guide means 44, which feeds the wire ropes 42 in precisely controlled relation on and off the drums 30, by the precise axial placement of sheaves 48.
The transmission is usually set up to provide a wire rope fleet angle substantially of zero. That is to say, the wire ropes extend tangentially from their respective drums, and in a plane or planes normal to the main axes of the drums.
In the absence of load transfer gears, the mechanism operates substantially with no backlash, with little noise and a-t high efficiency.
The inherent out-of-balance of the orbital drive plate 29 may be counterbalanced, at least in part, by balance masses 39, secured to and forming part of the cranks 34.
:
. . .
s9 It will be understood that the subject transmission has a wide utility, and that the illustrated winding mechanisms may be used in more orthodox fashion, with the direct wire rope attachment, between load and drum, in accordance with the invention.
- _ g _ ' - -
Claims (13)
1. A gearless transmission for a hoisting mechanism, having at least three parallel working shafts rotatably mounted in bearings, for rotation in working relation about their respective polar axis, each shaft having offset axle means located adjacent one end of the transmission, said offset axle means each having an axle extending therefrom parallel with and offset from said polar axis; a drive plate extending substantially normal to said polar axis, carrying at least three rotary bearings each connected in force transfer relation with a said axle; at least one said working shaft being connected in driving relation with a drum portion, in use to receive a cable in wind-on transfer relation therewith, and drive means rotatably connected with one said shaft in rotational transfer relation therewith, whereby, in use, operation of said drive means in force transfer rotational relation with said one shaft produces orbital displacement of said drive plate about said at least three rotary bearings, and rotation of said at least three working shafts in mutually synchronized rotational relation, and driven operation of said drum portion.
2. The transmission as set forth in Claim 1 having four said parallel working shafts in mutually spaced relation about an axis located therebetween.
3. The transmission as set forth in Claim 1, said drive means having a drive shaft connected in rotational driving relation with said one shaft, and motor means in selective driving relation with said drive shaft.
4. The transmission as set forth in Claim 1, said at least one shaft having a cable wound thereon, in force transfer relation therewith.
5. The transmission as set forth in Claim 4, each said working shaft having a drum portion with a cable wound thereon, in force transfer relation therewith.
6. The transmission as set forth in Claim 5, including level wind guide means located between said working shafts, for axial displacement thereof parallel with the polar axes of said shafts.
7. The transmission as set forth in Claim 6, said wind guide means having a plurality of guide sheaves mounted in mutually spaced relation thereon, and shaft means supporting said level wind guide means for displacement therealong parallel with said working shafts.
8. The transmission as set forth in Claim 7, wherein said supporting shaft means is in rotatable, threaded relation with said wind guide means, to effect controlled axial displacement of the wind guide means along the supporting shaft means.
9. The transmission as set forth in Claim 1, a plurality of said working shafts each having a drum portion, each with a cable wound thereon.
10. The transmission as set forth in Claim 9, including level wind guide means located adjacent said working shafts, for axial displacement relative thereto.
11. The transmission as set forth in Claim 10, said level wind guide means having a plurality of sheaves rotatably mounted thereon in mutually spaced relation, and shaft means supporting said level wind guide means for displacement therealong parallel with said working shafts.
12. The transmission as set forth in Claim 7, said plurality of guide pulleys being mounted on said level wind guide means to provide an off-going and on-coming cable guide directed axially of the transmission.
13. The transmission as set forth in Claim 1, at least one said crank means having a counterbalance weight extending outwardly therefrom in at least partial balancing relation with unbalanced portions of said transmission.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000614459A CA1294459C (en) | 1989-09-29 | 1989-09-29 | Gearless transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000614459A CA1294459C (en) | 1989-09-29 | 1989-09-29 | Gearless transmission |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1294459C true CA1294459C (en) | 1992-01-21 |
Family
ID=4140789
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000614459A Expired - Lifetime CA1294459C (en) | 1989-09-29 | 1989-09-29 | Gearless transmission |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1294459C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010094510A1 (en) * | 2009-02-23 | 2010-08-26 | Gangolf Jobb | Synchronization gearbox for a multi-axle rotating piston machine |
| WO2014072008A1 (en) * | 2012-11-09 | 2014-05-15 | Khs Gmbh | Modular bag-transfer system |
-
1989
- 1989-09-29 CA CA000614459A patent/CA1294459C/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010094510A1 (en) * | 2009-02-23 | 2010-08-26 | Gangolf Jobb | Synchronization gearbox for a multi-axle rotating piston machine |
| WO2014072008A1 (en) * | 2012-11-09 | 2014-05-15 | Khs Gmbh | Modular bag-transfer system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |