GB2594742A - Differential device for mobility aids - Google Patents
Differential device for mobility aids Download PDFInfo
- Publication number
- GB2594742A GB2594742A GB2006754.2A GB202006754A GB2594742A GB 2594742 A GB2594742 A GB 2594742A GB 202006754 A GB202006754 A GB 202006754A GB 2594742 A GB2594742 A GB 2594742A
- Authority
- GB
- United Kingdom
- Prior art keywords
- gear
- spider
- worm gear
- differential
- worm
- 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.)
- Withdrawn
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
- F16H48/00—Differential gearings
- F16H48/06—Differential gearings with gears having orbital motion
- F16H48/08—Differential gearings with gears having orbital motion comprising bevel gears
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
- A61G5/04—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs motor-driven
-
- 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
- F16H48/00—Differential gearings
- F16H48/06—Differential gearings with gears having orbital motion
- F16H48/08—Differential gearings with gears having orbital motion comprising bevel gears
- F16H2048/085—Differential gearings with gears having orbital motion comprising bevel gears characterised by shafts or gear carriers for orbital gears
-
- 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
- F16H48/00—Differential gearings
- F16H48/38—Constructional details
- F16H2048/385—Constructional details of the ring or crown gear
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Retarders (AREA)
Abstract
A differential for mobility aids has a housing 11,12, with a planar worm gear 22 with teeth 221 meshing with a worm 21, a spider gear 32 extending out of two side surfaces of the worm gear 22, and meshing with two side gears 34 either side of the worm gear 22. The spider gear 32 has rod 33 received in grooves in the worm gear 22 and a positioning element 31 that supports one end of the rod 33. The rotation axis of the worm gear 22 can be skew to the rotation axis of the spider gear 32.
Description
1 DIFFERENTIAL DEVICE FOR MOBILITY AIDS
2 BACKGROUND OF THE INVENTION
3 I Field of the Invention
4 The present invention relates to a differential, and more particularly to a differential device for mobility aids.
6 2. Description of Related Art
7 To promote the use of mobility aids, it is necessary to make the mobility 8 aids turn smoothly. A conventional differential for a car enables the car to turn 9 smoothly, but does not suit the mobility aid with a small distance between its two trailing wheels because the size of the conventional differential is relatively large.
11 The conventional differential includes a housing, a worm gear set, and a 12 differential gear set. The worm gear set is mounted in the housing, and has a 13 worm, a worm gear, and at least one fixing beam. The worm gear meshes with the 14 worm. The at least one fixing beam is disposed on the worm gear and extends out of the worm gear along an axial direction of the worm gear. The differential gear 16 set is mounted in the housing, and has at least one spider gear and two side gears.
17 The at least one spider gear is rotatably mounted to the at least one fixing beam.
18 The two side gears are respectively positioned at two sides of the worm gear, and 19 each one of the two side gears is in mesh with the at least one spider gear.
However, the conventional differential for a car has the following 21 drawbacks.
22 1. Since the at least one fixing beam extends out of the worm gear, the 23 housing has to spare a space wide enough to accommodate not only a width of the 24 worm gear and widths of the two side gears but also a length of the at least one 1 fixing beam. In such an arrangement, size of the housing is hard to decrease, 2 thereby causing difficulty in mounting the conventional differential for a car 3 between the two trailing wheels of the mobility aid.
4 2. The at least one fixing beam extending out of the worm gear tends to detach from the worm gear after a long tern use. In that case, the at least one 6 spider gear cannot mesh with the two side gears precisely.
7 To overcome the shortcomings of the conventional differential for a car, 8 the present invention tends to provide a differential device for mobility aids to 9 mitigate or obviate the aforementioned problems.
SUMMARY OF THE INVENTION
11 The main objective of the present invention is to provide a differential 12 device for mobility aids.
13 The differential device for mobility aids includes a housing, a worm gear 14 set, and a differential gear set. The worm gear set is mounted in the housing and has a worm and a worm gear. The wonn gear is planar in shape and has a toothed 16 portion meshing with the worm. The differential gear set is mounted in the 17 housing and has at least one spider gear and two side gears. The at least one 18 spider gear is embedded in the worm gear laterally, extends out of two side 19 surfaces of the worm gear, and rotates relative to the worm gear about a rotation axis of the at least one spider gear. The rotation axis of the at least one spider gear 21 forms an angle with a rotation axis of the worm gear. The two side gears are 22 respectively positioned at two sides of the worm gear, and each one of the two 23 side gears is in mesh with the at least one spider gear.
24 Other objectives, advantages and novel features of the invention will 1 become more apparent from the following detailed description when taken in 2 conjunction with the accompanying drawings.
3 BRIEF DESCRIPTION OF THE DRAWINGS
4 Fig. 1 is a perspective view of a differential device for mobility aids in accordance with the present invention; 6 Fig. 2 is an exploded perspective view of the differential device for 7 mobility aids in Fig. 1; 8 Fig. 3 is a further exploded perspective view of the differential device for 9 mobility aids in Fig. 1; Fig. 4 is an enlarged perspective view of the differential device for 11 mobility aids in Fig. 1, shown without a second casing; 12 Fig. 5 is a front side view of the differential device for mobility aids in Fig. 13 4; and 14 Fig. 6 is a cross-sectional side view of the differential device for mobility aids along line 6-6 in Fig. 5.
16 DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 17 With reference to Figs. 1 to 3, a differential device for mobility aids in 18 accordance with the present invention includes a housing 10, a worm gear set 20, 19 and a differential gear set 30.
With reference to Figs. 1 to 3, the housing 10 has a first casing 11 and a 21 second casing 12. The first casing 11 has a first containing space 111, a first 22 receiving space 112, and a first retaining space 113. The first containing space 23 111 is laterally formed on one of two sides of the first casing 11 facing the second 24 casing 12. The first receiving space 112 is laterally formed on the side of the first 1 casing 11 that faces the second casing 12, is located below the first containing 2 space 111, and communicates with the first containing space 111. The first 3 retaining space 113 is formed in the first casing 11, is away from the second 4 casing 12, and communicates with the first receiving space 112. The second casing 12 has a second containing space 121, a second receiving space 122, and a 6 second retaining space 123. A spatial relationship among the second containing 7 space 121, the second receiving space 122, and the second retaining space 123 8 relative to the second casing 12 is same as that among the first containing space 9 111, the first receiving space 112, and the first retaining space 113 relative to the first casing 11.
11 With reference to Figs. 2 to 4, the worm gear set 20 is mounted in the 12 housing 10 and has a worm 21 and a worm gear 22. The worm 21 is mounted in 13 the first containing space 111 and the second containing space 121, and the worm 14 21 partially extends out of the housing 10 to be connected to a motor 40. The worm gear 22 is planar in shape, is mounted in the first receiving space 112 and 16 the second receiving space 122, and has a toothed portion 221, a receiving hole 17 222, and at least one receiving groove 223. The toothed portion 221 is annularly 18 arranged around an outer periphery of the worm gear 22, and the toothed portion 19 221 meshes with the worm 21. The receiving hole 222 is axially disposed through the worm gear 22. The at least one receiving groove 223 is axially farmed on one 21 of two side surfaces of the worm gear 22, and has a passing hole and two 22 containing grooves 224. The passing hole is axially disposed through the two 23 side surfaces of the worm gear 22, and is spaced apart from the receiving hole 222.
24 The two containing grooves 224 are axially formed on one of the two side 1 surfaces of the worm gear 22 that faces the second casing 12. One of the two 2 containing grooves 224 communicates with the receiving hole 222 and the 3 passing hole. The other one of the two containing grooves 224 is disposed in the 4 at least one receiving groove 223, is away from the receiving hole 222, and communicates with the passing hole.
6 In other embodiments, the toothed portion 221 is disposed on one of the 7 two side surfaces of the worm gear 22 annularly, is adjacent to the outer periphery 8 of the worm gear 22, meshes with the worm 21, and surrounds the receiving hole 9 222 and the at least one receiving groove 223.
With reference to Figs. 3 to 5, the differential gear set 30 is mounted in the 11 housing 10 and has a positioning element 31, at least one spider gear 32, at least 12 one rod 33, and two side gears 34. With reference to Figs. 3 and 6, the positioning 13 element 31 tightly fits in the receiving hole 222 of the wonn gear 22, and has a 14 through hole 311 and at least one positioning groove 312. The through hole 311 is axially disposed through the positioning element 31. The at least one 16 positioning groove 312 is axially formed on one of two sides of the positioning 17 element 31 and extends into a periphery of the positioning element 31. When the 18 positioning element 31 is tightly mounted in the receiving hole 222, the at least 19 one positioning groove 312 communicates with the containing groove 224 in the at least one receiving groove 223 that communicates with the receiving hole 222 21 and the passing hole. The at least one spider gear 32 is disposed in the passing 22 hole of the at least one receiving groove 223, and the at least one spider gear 32 23 extends out of the two side surfaces of the worm gear 22.
24 The at least one rod 33 axially passes through the at least one spider gear 1 32, and the at least one rod 33 and the at least one spider gear 32 are disposed in 2 the at least one receiving groove 223 together. One of two ends of the at least one 3 rod 33 is disposed in the at least one positioning groove 312 and the containing 4 groove 224 adjacent to the receiving hole 222. The other one of the two ends of the at least one rod 33 is disposed in the containing groove 224 away from the 6 receiving hole 222, such that the at least one spider gear 32 can be positioned 7 between the worm gear 22 and the positioning element 31 via the at least one rod 8 33. In this way, the at least one spider gear 32 is embedded in the worm gear 22 9 laterally, and the at least one spider gear 32 can rotate relative to the worm gear 22 about the at least one rod 33 as a rotation axis. Furthermore, the rotation axis 11 of the worm gear 22 and a rotation axis of the at least one spider gear 32 intersect 12 and form an angle.
13 In the present invention, the at least one spider gear 32 extends out of the 14 worm gear 22 with its exposed circumferences of the same length at two sides of the worm gear 22, such that the rotation axis of the worm gear 22 and the rotation 16 axis of the at least one spider gear 32 intersect. Furthermore, the angle between 17 the rotation axis of the worm gear 22 and the rotation axis of the at least one 18 spider gear 32 is 900. In other embodiments, the at least one spider gear 32 19 extends out of the worm gear 22 with its exposed circumferences of different lengths at the two sides of the worm gear 22, such that the rotation axis of the 21 worm gear 22 and the rotation axis of the at least one spider gear 32 are skew.
22 In the present invention, the worm gear 22 has four said receiving grooves 23 223 formed at equi-angular intervals on the worm gear 22, and the four receiving 24 grooves 223 surround the receiving hole 222. Each one of the four receiving 1 grooves 223 has the passing hole communicating with the receiving hole 222 via 2 the containing groove 224 communicating with the receiving hole 222. The 3 positioning element 31 has four said positioning grooves 312 formed at 4 equi-angular intervals on the positioning element 31, and each one of the four positioning grooves 312 communicates with the containing groove 224 of one of 6 the four receiving grooves 223 communicating with the receiving hole 222. The 7 differential gear set 30 has four said spider gears 32 and four said rods 33. Each 8 one of the four rods 33 axially passes through a respective one of the four spider 9 gears 32, and then each one of the four rods 33 is disposed in a respective one of the four receiving grooves 223 along with the corresponding spider gear 32. By 11 having the four spider gears 32, transmission load that can be carried by the 12 present invention is increased. Moreover, the four spider gears 32 are embedded 13 at equi-angular intervals in the worm gear 22. In such an arrangement, force 14 exerted on the worm gear 22 can be distributed evenly, the likelihood of breaking the worm gear 22 is lowered, and life span of the worm gear 22 is also prolonged.
16 With reference to Figs. 4 to 6, the two side gears 34 are respectively 17 positioned at the two sides of the worm gear 22, and each one of the two side 18 gears 34 is in mesh with the at least one spider gear 32. Furthermore, each one of 19 the two side gears 34 has a transmission shaft 341, and the transmission shaft 341 is mounted through the side gear 34 axially. One of two ends of the transmission 21 shaft 341 extends into the through hole 311 of the positioning element 31. The 22 other one of the two ends of the transmission shaft 341 extends out of the housing 23 10 and is mounted to one of two trailing wheels 50 of a mobility aid as shown in 24 Fig. 1.
1 With reference to Figs. 3 and 6, in the present invention, the differential 2 gear set 30 has two bearings 35 After the transmission shaft 341 of one of the two 3 side gears 34 passes through one of the two bearings 35, the corresponding 4 bearing 35 is disposed in the first retaining space 113 of the first casing 11. One of the two ends of the transmission shaft 341 away from the positioning element 6 31 extends out of the first casing 11. After the transmission shaft 341 of the other 7 one of the two side gears 34 passes through the other one of the two bearings 35, 8 the corresponding bearing 35 is disposed in the second retaining space 123 of the 9 second casing 12. One of the two ends of the transmission shaft 341 away from the positioning element 31 extends out of the second casing 12.
11 With reference to Figs. 1 and 4, under the circumstance that the mobility 12 aid moves straight, the worm 21 is driven by the motor 40, and then the worm 13 gear 22 is driven to rotate by the worm 21. At this time, the at least one spider 14 gear 32 embedded in the worm gear 22 revolves along with the worm gear 22 but does not rotate relative to the worm gear 22 on the at least one rod 33.
16 Simultaneously, the two side gears 34 in mesh with the at least one spider gear 32 17 are pushed by the at least one spider gear 32.
18 With reference to Fig. 6, under the circumstance that the mobility aid is 19 taking a turn, the at least one spider gear 32 rotates relative to the worm gear 22 on the at least one rod 33. Since the at least one spider gear 32 meshes with the 21 two side gears 34 at peripheral velocities in opposite directions, a peripheral 22 velocity of the side gear 34 which rotates in the same direction as the at least one 23 spider gear 32 increases. On the contrary, a peripheral velocity of the side gear 34 24 which rotates in an opposite direction to the at least one spider gear 32 decreases.
1 In such an arrangement, the mobility aid can turn smoothly with the differential 2 device of the present invention.
3 With the aforementioned technical characteristics, the differential device 4 has the following advantages.
1. With reference to Figs. 3 and 6, since the at least one spider gear 32 6 is embedded in the worm gear 22 laterally, the housing 10 only has to spare a 7 space formed by the first receiving space 112 and the second receiving space 122 8 to accommodate a width of the worm gear 22 and widths of the two side gears 34.
9 Compared with the conventional differential for a car that needs to spare a space to accommodate the width of the worm gear, the widths of the two side gears, and 11 a length of the at least one fixing beam, the volume and width of the housing 10 of 12 the present invention are drastically decreased. Therefore, the present invention 13 is suitable for the mobility aid with a small distance between its two trailing 14 wheels 50.
2. Compared with the conventional differential for a car that has the at 16 least one fixing beam tending to detach from the worm gear and causing 17 imprecise meshing of the at least one spider gear and the two side gears, the 18 present invention has the at least one spider gear 32 embedded in the worm gear 19 22 without said fixing beam. In this way, the at least one spider gear 32 can be well positioned in the worm gear 22, so the at least one spider gear 32 can still 21 mesh with the two side gears 34 precisely after a long term use.
22 Even though numerous characteristics and advantages of the present 23 invention have been set forth in the foregoing description, together with details of 24 the structure and features of the invention, the disclosure is illustrative only.
Changes may be made in the details, especially in matters of shape, size, and 2 arrangement of parts within the principles of the invention to the full extent 3 indicated by die broad general meaning of the terms in which the appended 4 claims are expressed.
Claims (20)
1 WHAT IS CLAIMED IS: 2 1. A differential device for mobility ai ds comprising: 3 a housing; 4 a worm gear set mounted in the housing and having a worm; and 6 a worm gear being planar in shape and having 7 a toothed portion meshing with the worm; and 8 a differential gear set mounted in the housing and having 9 at least one spider gear embedded in the worm gear laterally, extending out of two side surfaces of the worm gear, and rotating relative to the 11 worm gear about a rotation axis of the at least one spider gear, forming an angle 12 with a rotation axis of the worm gear; and 13 two side gears respectively positioned at two sides of the worm gear, 14 and each one of the two side gears meshing with the at least one spider gear.
2. The differential device for mobility aids as claimed in claim 1, 16 wherein the toothed portion is annularly arranged around an outer periphery of 17 the worm gear.18
3. The differential device for mobility aids as claimed in claim 1, 19 wherein the toothed portion is disposed on one of the two side surfaces of the worm gear, and is spaced apart from the at least one spider gear.21
4. The differential device for mobility aids as claimed in claim 1, 22 wherein the rotation axis of the at least one spider gear and the rotation axis of the 23 worm gear are skew.24
5 The differential device for mobility aids as claimed in claim 1, 1 wherein the rotation axis of the at least one spider gear and the rotation axis of the 2 worm gear intersect.3
6. The differential device for mobility aids as claimed in claim 1, 4 wherein the differential gear set has multiple said spider gears embedded in the worm gear at equi-angular intervals.6
7. The differential device for mobility aids as claimed in claim 2, 7 wherein the differential gear set has multiple said spider gears embedded in the 8 worm gear at equi-angular intervals.9
8. The differential device for mobility aids as claimed in claim 3, wherein the differential gear set has multiple said spider gears embedded in the 11 worm gear at equi-angular intervals.12
9. The differential device for mobility aids as claimed in claim 4, 13 wherein the differential gear set has multiple said spider gears embedded in the 14 worm gear at equi-angular intervals.
10. The differential device for mobility aids as claimed in claim 5, 16 wherein the differential gear set has multiple said spider gears embedded in the 17 worm gear at equi-angular intervals.18
11. The differential device for mobility aids as claimed in claim 1, 19 wherein the differential gear set has a positioning element mounted in the warm 21 gear; and 22 each one of the two side gears has a transmission shaft having 23 two ends, one of the two ends of the transmission shaft extending 24 into the positioning element, and the other one of the two ends of the transmission shaft extending out of the housing.2
12. The differential device for mobility aids as claimed in claim 2, 3 wherein 4 the differential gear set has a positioning element mounted in the worm gear; and 6 each one of the two side gears has a transmission shaft having 7 Two ends, one of the two ends of the transmission shaft extending 8 into the positioning element, and the other one of the two ends of the transmission 9 shaft extending out of the housing.
13. The differential device for mobility aids as claimed in claim 3, 11 wherein 12 the differential gear set has a positioning element mounted in the worm 13 gear; and 14 each one of the two side gears has a transmission shaft having two ends, one of the two ends of the transmission shaft extending 16 into the positioning element, and the other one of the two ends of the transmission 17 shaft extending out of the housing.18
14. The differential device for mobility aids as claimed in claim 4, 19 wherein the differential gear set has a positioning element mounted in the wonn 21 gear; and 22 each one of the two side gears has a transmission shaft haying 23 two ends, one of the two ends of the transmission shaft extending 24 into the positioning element, and the other one of the two ends of the transmission 1 shaft extending out of the housing.2
15. The differential device for mobility aids as claimed in claim 5, 3 wherein 4 the differential gear set has a positioning element mounted in the worm gear; and 6 each one of the two side gears has a transmission shaft having 7 two ends, one of the two ends of the transmission shaft extending 8 into the positioning element, and the other one of the two ends of the transmission 9 shaft extending out of the housing.
16. The differential device for mobility aids as claimed in claim 11, 11 wherein 12 the differential gear set has at least one rod passing through the at least one 13 spider gear, embedded in the worm gear laterally along with the at least one 14 spider gear, and having two ends, one of the two ends of the at least one rod embedded in the 16 positioning element, such that the at least one spider gear rotates relative to the 17 worm gear about the at least one rod as the rotation axis.18
17. The differential device for mobility aids as claimed in claim 12, 19 wherein the differential gear set has at least one rod passing through the at least one 21 spider gear, embedded in the worm gear laterally along with the at least one 22 spider gear, and having 23 two ends, one of the two ends of the at least one rod embedded in the 24 positioning element, such that the at least one spider gear rotates relative to the 1 worm gear about the at least one rod as the rotation axis.2
18. The differential device for mobility aids as claimed in claim 13, 3 wherein 4 the differential gear set has at least one rod passing through the at least one spider gear, embedded in the worm gear laterally along with the at least one 6 spider gear, and haying 7 two ends, one of the two ends of the at least one rod embedded in the 8 positioning element, such that the at least one spider gear rotates relative to the 9 wonn gear about the at least one rod as the rotation axis.
19. The differential device for mobility aids as claimed in claim 14, 11 wherein 12 the differential gear set has at least one rod passing through the at least one 13 spider gear, embedded in the worm gear laterally along with the at least one 14 spider gear, and haying two ends, one of the two ends of the at least one rod embedded in the 16 positioning element, such that the at least one spider gear rotates relative to the 17 worm gear about the at least one rod as the rotation axis.18
20. The differential device for mobility aids as claimed in claim 15, 19 wherein the differential gear set has at least one rod passing through the at least one 21 spider gear, embedded in the worm gear laterally along with the at least one 22 spider gear, and having 23 two ends, one of the two ends of the at least one rod embedded in the 24 positioning element, such that the at least one spider gear rotates relative to the 1 worm gear about the at least one rod as the rotation axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2006754.2A GB2594742A (en) | 2020-05-07 | 2020-05-07 | Differential device for mobility aids |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2006754.2A GB2594742A (en) | 2020-05-07 | 2020-05-07 | Differential device for mobility aids |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB202006754D0 GB202006754D0 (en) | 2020-06-24 |
| GB2594742A true GB2594742A (en) | 2021-11-10 |
Family
ID=71135044
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2006754.2A Withdrawn GB2594742A (en) | 2020-05-07 | 2020-05-07 | Differential device for mobility aids |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2594742A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1061450A (en) * | 1912-09-05 | 1913-05-13 | Arthur Coleman | Differential mechanism. |
| US2613753A (en) * | 1946-09-26 | 1952-10-14 | Jr Walter C Stuebing | Motorized drive wheel assembly for lift trucks or the like |
| US3779102A (en) * | 1971-03-26 | 1973-12-18 | Sulzer Ag | Differential gear |
| US5928101A (en) * | 1995-04-04 | 1999-07-27 | Hancock; Frank John Thompson | Differential gear mechanism |
| WO2007107316A2 (en) * | 2006-03-20 | 2007-09-27 | Amer S.P.A. | Transmission unit for vehicles |
-
2020
- 2020-05-07 GB GB2006754.2A patent/GB2594742A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1061450A (en) * | 1912-09-05 | 1913-05-13 | Arthur Coleman | Differential mechanism. |
| US2613753A (en) * | 1946-09-26 | 1952-10-14 | Jr Walter C Stuebing | Motorized drive wheel assembly for lift trucks or the like |
| US3779102A (en) * | 1971-03-26 | 1973-12-18 | Sulzer Ag | Differential gear |
| US5928101A (en) * | 1995-04-04 | 1999-07-27 | Hancock; Frank John Thompson | Differential gear mechanism |
| WO2007107316A2 (en) * | 2006-03-20 | 2007-09-27 | Amer S.P.A. | Transmission unit for vehicles |
Also Published As
| Publication number | Publication date |
|---|---|
| GB202006754D0 (en) | 2020-06-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |