CA1041773A - Lawn mower - Google Patents
Lawn mowerInfo
- Publication number
- CA1041773A CA1041773A CA267,763A CA267763A CA1041773A CA 1041773 A CA1041773 A CA 1041773A CA 267763 A CA267763 A CA 267763A CA 1041773 A CA1041773 A CA 1041773A
- Authority
- CA
- Canada
- Prior art keywords
- blade
- rotation
- rotor
- axis
- ring member
- 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
Links
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01D—HARVESTING; MOWING
- A01D34/00—Mowers; Mowing apparatus of harvesters
- A01D34/01—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus
- A01D34/412—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters
- A01D34/63—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a vertical axis
- A01D34/67—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a vertical axis hand-guided by a walking operator
- A01D34/68—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a vertical axis hand-guided by a walking operator with motor driven cutters or wheels
- A01D34/685—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a vertical axis hand-guided by a walking operator with motor driven cutters or wheels with two or more cutters
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/32—Modifications of amplifiers to reduce non-linear distortion
- H03F1/3241—Modifications of amplifiers to reduce non-linear distortion using predistortion circuits
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01D—HARVESTING; MOWING
- A01D2101/00—Lawn-mowers
Abstract
ABSTRACT OF THE DISCLOSURE
A lawn mower is disclosed, having a novel cutting arrangement. The mower has a housing with an open bottom, and a blade carrying rotor mounted within the housing. The blades are disc cutters, mounted in pairs on the rotor by means of support members themselves pivotally mounted on the rotor.
One blade of each pair has a driving shaft that projects upwardly from the support member and carries a roller at its upper end. Upon rotation of the rotor, the support members swing outwardly under centrifugal force until the rollers come into contact with a ring mounted on the underside of the housing top wall. This contact drives the roller, its shaft and the associated blade.
The other blade has a shaft that is biased with an appropriate spring to bring the two blades into overlapping contact. Thus, rotation of the one roller causes counter-rotation of the other.
A lawn mower is disclosed, having a novel cutting arrangement. The mower has a housing with an open bottom, and a blade carrying rotor mounted within the housing. The blades are disc cutters, mounted in pairs on the rotor by means of support members themselves pivotally mounted on the rotor.
One blade of each pair has a driving shaft that projects upwardly from the support member and carries a roller at its upper end. Upon rotation of the rotor, the support members swing outwardly under centrifugal force until the rollers come into contact with a ring mounted on the underside of the housing top wall. This contact drives the roller, its shaft and the associated blade.
The other blade has a shaft that is biased with an appropriate spring to bring the two blades into overlapping contact. Thus, rotation of the one roller causes counter-rotation of the other.
Description
1~ 73 The present invention relates to lawn mowers, To date there have been three common types of mowing machines, i,e. the "clipper", the "reel"
and "rotary" type mowers.
The present invention relates to an improved lawn mower which is quite different in mechanism from those conventional lawn mowers. More particularly, this invention relates to an improved lawn mower in which a disc or rotor is rotatably mounted under the mower housing and a suitable number of pairs of disc like blades is mounted on the rotary disc in such a manner that each of the blades rotates about its own axis and revolves about that of the disc in a planetary motion. Lawn mowing is performed by mutual rotating and sliding contact between th0 blades of each pair.
A mower of this type is disclosed in applicant's Canadian Patent Application 246,793, filed February 27, 1976. In that mower, the pairs of blades are mounted on respective gear casings,containing gears coupling the shafts of the blades for counter rotation~ The gear casing itself is pivot-ally mounted on the disc so that it piYots outwardly upon rota~ion of the disc. The blade shafts ar driven by centrifugal engagement of a roller carried by one of them with a cylindrical flange mounted on the underside of the mower housing. The present invention is concerned with the provision of a lawn mower which uses no driving gears.
According to the present invention there is provided a lal~n mower comprising: a housing having an open bottom; a ring member mounted within the housing with its axis upright; a rotor within the housing, mounted on rotation about the axis of the ring member; a support member pivotally mount-ed on the rotor for rota~ion about an upri~ht axis; two blade shafts jou~nal-led to the support member for independent rotation about respective upright axes; two disc-like blades mounted on the lower ends of respective ones of the blade shafts, beneath the suppor~ member, the blades having overlapping cutting edges; a roller mounted on one of the blade shafts, at the level of -the ring member; resilient mesns coupled to the other of the blade shafts to bias its blade into engagement with the blade of the one blade shaft such that rotation of the one blade shaft and its blade in one direction will cause a rotation of the other blade in the opposite direction; and means for rotating the rotor, the positioning of the ring member, the axis of the support member and the blade shafts being such that upon rotation of the rotor, the support ~ember will pivot about its axis under the influence of centrifugal force un-til the roller comes into engagement with the inside of the ring member to cause rotation of the roller7 the one blade shaft and its blade about the axis of the one blade shaft and, via engagement of the blades, rotation of the other blade.
With this improved lawm mower, the support member is lighter in weight; the magnitude of the centrifugal force on the support mem~er is re-ducad; and both the impactive load at start up and the steady running load of the blade driving roller on the inside surface of the ring member is reduced so that roller wear is improved and the noise generated by the rotation of the roller on-the ring member is reduced.
Another advantage of this structure is a reduction in cost of the lawn mower by simplifying the structure of the support member and ~he rotary shafts.
The accompanying drawings illustrate a preferred embodiment of the la~m mower according to the invention in which:
Figure 1 is a bottom view, partly in section, of the embodimen~;
Figure 2 is a section along the line II-II of Figure 1, and;
Figure 3 is a plan view along the line III-III of Figure 2.
Referring to the drawings, the mower has a housing 1 with a flat top wall, a square peripheral wall, a central cylindrical wall and an open bottom. Four supporting wheels 2, 2 are mounted on the housing, adjacent the respective corners. A motor 4 is mounted on the top wall of the housing. A
ring member in the form of a ~t~tionarycylindrical flange 5 is mounted within 1,. . ..
7~3 the housing on the underside of the top wall, concentrically with the central cylindrical wall of the housing. A rotor or disk 3 is mounted on the motor drive shaft, beneath the flange 5 and concentrically therewith.
A suitable number of support members 8, 8 are pivotally mounted on the underside of disc 3 by means of respective shafts 9. Each shaft 9 is it-self carried on disc 3 via a pillow block secured to a radial flange 17 depend-ing from disc 3. In Figure 1, three support members are shown with an angu-lar spacing of 120 . Each support member 8 has two blade shafts 10a and lOb journalled to it for independent rotation about spaced apart axes parallel to the motor shaft 6. The shafts lOa, 10b have mounted to their bottom ends, respective disc cutter blades 7a, 7b. -~
Each support member 8 is a box shape and is mounted on the under-side of disc 3 in such a manner that it can pivot outward with the shaft 9 as a fulcrum, under the influence of the centrifugal force generated by rotation of the disc 3. The shafts 10a and 10b are arranged such that when the support member 8 pivots outward upon rotation of the disc 3 in the direction t, they are aligned radially of the disc 3, so that the lawn to be mown can be taken in between the two blades 7a3 7b.
The support member 8 can pi~ot in a direction opposite to the direc-tion of rotation t of the disc 3. This is to enable the support member andthe blades to be pivoted inwardly when foreign objects such as stones or wood in the lawn hit the support or blades, so as to prevent damage to the machine.
Each of the blades 7a, 7b has the shape of a flat disc or plate with its periphery formed into a cutting edge 11a or 11b respecti~ely. These blades are fixed to the shafts 10a, lOb in such a manner that the blades con-tact and overlap each other so as to produce a scissors type of cutting action when the two blades rotate in opposite directions.
Two shafts 10a and 10b are mounted to a support member 8 such that . ~, ~ . .
they rotate independentlyO Also, a bias spring 13 is applied to shaft 10b so ~ 4fl~7q3 that the blade 7b mounted on this shaft is urged into engagement with the other, 7a for effecting a relative sliding and a shearing motion so as to draw in the grass between the blades and to cut it.
Shaft 10a extends upwardly from the support member 8 so as to pro-ject throughi an arcuate slot 14 in the disc 3. A roller 15 is mounted on the -upper end of shaft 10a. Roller 15 is rotated by contact with the inside sur-face of the stationary flange 5 located under the housing 1. The other shaft 10b is mounted rotatably on the support member 8 as mentioned3 and because of the downwards bias generated by pressing spring 13, blade 7b rotates in contact with blade 7a.
As sho~m in the drawings, the rotary disc 3 is larger in diameter than the flange 5. Consequently, shaft 10a projects through the arcuate slot 14 provided in the rotary disc 3. However, the disc 3 may in other embodiments be smaller than the ring 5. For exampleg the disc ~ may be only of sufficient size to mount the shafts 9 for the support members 8. In such a case, the `
arcuate slot 14 of the disc 3 is naturally not necessary.
.
~ he rotary roller 15 is made of metal material on which hard rubber or synthetic resin is applied. It is fo~med in a ring shape and with a dia-meter similar to or a bit smaller than that of the blades 7a, 7bo In order to reduce the noise generated by the contact between the rotary roller 15 and the stationary ring 5, it is preferable to provide a hollow tire type rotary roller.
In the drawings, reference numeral 17 indicates a flange or fin which extends in a radial direction under the disc 3. The fin 17 generates an air flow within the housing 1 upon rotation of the disc 3, which flow allows the mown lawn to be discharged from the discharge opening 18 from the housing 1.
Operation of ~he lawn mower is as follows:
~`~ Motor 4 rotates disc 3 in a generally horizontal plane in direction ... ~.- ' ', 7~;~
t via drive shaft 6. The support member 8 mounted on the disc pivots outward---ly about the shaft 9, under the influence of centrifugal force. Simultaneous-ly with this movement, the rotary shaft lOa for the rotary blade 7a moves ;`
along the arcuate slot 14 in the disc 3 ancl roller 15, which is mounted on the shaft lOa is pressed into engagement with the inside surface of the stat~
ionary ring 5.
Roller 15 rolls along the inside surface of the ring 5 so as torotate the shaft lOa. Consequently, the blade 7a rotates with shaft lOa and revolves about the axis of shaft 6 in a planetary movement. Because of the planetary movement of the blade 7a, ~he other blade 7b3 which is biased into engagement with blade 7a by spring 13, rotates in a direction opposite to that of blade 7a. Thus, through this mutual contact, a relative rotat-ing and sliding motion is effected between the superposed blade edges of the two rotary blades and lawn mowing is performed.
As described above, two parallel shafts lOa, lOb for respective disc-like blades, 7a, 7b are mounted on a support member 8 such that the shafts rotate independently. A biasing spring 13 is applied to one shaft, lOb, i~
so that the blade 7b mounted on that shact is pressed into engagement with the other blade 7a for taking in and cutting the lawn. In this way~ since a ; -pair of two rotary blades can be rotated in opposite directions, there is no need to -provide a dri~ing gear as is-used in the prior apparatus and, thus, the support member can be designed smaller and lighter than the prior one. `~
Therefore, the contrifugal force applied to the support member at the time of starting the mower, is reduced. In additiong the shock and noise generated at the moment when the roller 15 contacts the flange 5 is reduced.
Further, since the force applied by roller 15 on the flange 5 can be small during operation of the mower, the roller can be used for long periods without being worn out or damaged. In additiona the noise generated when the roller rolls along the flange can be reduced.
. .. . . ...... . . . . . ... . . ........ . ..................... .
.. ~ .. , . . .. - . , .. . , , : : , , : , - .. , , ; . , . . : ., .::
Also, since a driving gear is not used, the structure of the support member and cutter shaft assembly is simplified and, therefore, the machine, which has an excellent service life, can be produced a~ a low cost.
- ` - 6 -.,
and "rotary" type mowers.
The present invention relates to an improved lawn mower which is quite different in mechanism from those conventional lawn mowers. More particularly, this invention relates to an improved lawn mower in which a disc or rotor is rotatably mounted under the mower housing and a suitable number of pairs of disc like blades is mounted on the rotary disc in such a manner that each of the blades rotates about its own axis and revolves about that of the disc in a planetary motion. Lawn mowing is performed by mutual rotating and sliding contact between th0 blades of each pair.
A mower of this type is disclosed in applicant's Canadian Patent Application 246,793, filed February 27, 1976. In that mower, the pairs of blades are mounted on respective gear casings,containing gears coupling the shafts of the blades for counter rotation~ The gear casing itself is pivot-ally mounted on the disc so that it piYots outwardly upon rota~ion of the disc. The blade shafts ar driven by centrifugal engagement of a roller carried by one of them with a cylindrical flange mounted on the underside of the mower housing. The present invention is concerned with the provision of a lawn mower which uses no driving gears.
According to the present invention there is provided a lal~n mower comprising: a housing having an open bottom; a ring member mounted within the housing with its axis upright; a rotor within the housing, mounted on rotation about the axis of the ring member; a support member pivotally mount-ed on the rotor for rota~ion about an upri~ht axis; two blade shafts jou~nal-led to the support member for independent rotation about respective upright axes; two disc-like blades mounted on the lower ends of respective ones of the blade shafts, beneath the suppor~ member, the blades having overlapping cutting edges; a roller mounted on one of the blade shafts, at the level of -the ring member; resilient mesns coupled to the other of the blade shafts to bias its blade into engagement with the blade of the one blade shaft such that rotation of the one blade shaft and its blade in one direction will cause a rotation of the other blade in the opposite direction; and means for rotating the rotor, the positioning of the ring member, the axis of the support member and the blade shafts being such that upon rotation of the rotor, the support ~ember will pivot about its axis under the influence of centrifugal force un-til the roller comes into engagement with the inside of the ring member to cause rotation of the roller7 the one blade shaft and its blade about the axis of the one blade shaft and, via engagement of the blades, rotation of the other blade.
With this improved lawm mower, the support member is lighter in weight; the magnitude of the centrifugal force on the support mem~er is re-ducad; and both the impactive load at start up and the steady running load of the blade driving roller on the inside surface of the ring member is reduced so that roller wear is improved and the noise generated by the rotation of the roller on-the ring member is reduced.
Another advantage of this structure is a reduction in cost of the lawn mower by simplifying the structure of the support member and ~he rotary shafts.
The accompanying drawings illustrate a preferred embodiment of the la~m mower according to the invention in which:
Figure 1 is a bottom view, partly in section, of the embodimen~;
Figure 2 is a section along the line II-II of Figure 1, and;
Figure 3 is a plan view along the line III-III of Figure 2.
Referring to the drawings, the mower has a housing 1 with a flat top wall, a square peripheral wall, a central cylindrical wall and an open bottom. Four supporting wheels 2, 2 are mounted on the housing, adjacent the respective corners. A motor 4 is mounted on the top wall of the housing. A
ring member in the form of a ~t~tionarycylindrical flange 5 is mounted within 1,. . ..
7~3 the housing on the underside of the top wall, concentrically with the central cylindrical wall of the housing. A rotor or disk 3 is mounted on the motor drive shaft, beneath the flange 5 and concentrically therewith.
A suitable number of support members 8, 8 are pivotally mounted on the underside of disc 3 by means of respective shafts 9. Each shaft 9 is it-self carried on disc 3 via a pillow block secured to a radial flange 17 depend-ing from disc 3. In Figure 1, three support members are shown with an angu-lar spacing of 120 . Each support member 8 has two blade shafts 10a and lOb journalled to it for independent rotation about spaced apart axes parallel to the motor shaft 6. The shafts lOa, 10b have mounted to their bottom ends, respective disc cutter blades 7a, 7b. -~
Each support member 8 is a box shape and is mounted on the under-side of disc 3 in such a manner that it can pivot outward with the shaft 9 as a fulcrum, under the influence of the centrifugal force generated by rotation of the disc 3. The shafts 10a and 10b are arranged such that when the support member 8 pivots outward upon rotation of the disc 3 in the direction t, they are aligned radially of the disc 3, so that the lawn to be mown can be taken in between the two blades 7a3 7b.
The support member 8 can pi~ot in a direction opposite to the direc-tion of rotation t of the disc 3. This is to enable the support member andthe blades to be pivoted inwardly when foreign objects such as stones or wood in the lawn hit the support or blades, so as to prevent damage to the machine.
Each of the blades 7a, 7b has the shape of a flat disc or plate with its periphery formed into a cutting edge 11a or 11b respecti~ely. These blades are fixed to the shafts 10a, lOb in such a manner that the blades con-tact and overlap each other so as to produce a scissors type of cutting action when the two blades rotate in opposite directions.
Two shafts 10a and 10b are mounted to a support member 8 such that . ~, ~ . .
they rotate independentlyO Also, a bias spring 13 is applied to shaft 10b so ~ 4fl~7q3 that the blade 7b mounted on this shaft is urged into engagement with the other, 7a for effecting a relative sliding and a shearing motion so as to draw in the grass between the blades and to cut it.
Shaft 10a extends upwardly from the support member 8 so as to pro-ject throughi an arcuate slot 14 in the disc 3. A roller 15 is mounted on the -upper end of shaft 10a. Roller 15 is rotated by contact with the inside sur-face of the stationary flange 5 located under the housing 1. The other shaft 10b is mounted rotatably on the support member 8 as mentioned3 and because of the downwards bias generated by pressing spring 13, blade 7b rotates in contact with blade 7a.
As sho~m in the drawings, the rotary disc 3 is larger in diameter than the flange 5. Consequently, shaft 10a projects through the arcuate slot 14 provided in the rotary disc 3. However, the disc 3 may in other embodiments be smaller than the ring 5. For exampleg the disc ~ may be only of sufficient size to mount the shafts 9 for the support members 8. In such a case, the `
arcuate slot 14 of the disc 3 is naturally not necessary.
.
~ he rotary roller 15 is made of metal material on which hard rubber or synthetic resin is applied. It is fo~med in a ring shape and with a dia-meter similar to or a bit smaller than that of the blades 7a, 7bo In order to reduce the noise generated by the contact between the rotary roller 15 and the stationary ring 5, it is preferable to provide a hollow tire type rotary roller.
In the drawings, reference numeral 17 indicates a flange or fin which extends in a radial direction under the disc 3. The fin 17 generates an air flow within the housing 1 upon rotation of the disc 3, which flow allows the mown lawn to be discharged from the discharge opening 18 from the housing 1.
Operation of ~he lawn mower is as follows:
~`~ Motor 4 rotates disc 3 in a generally horizontal plane in direction ... ~.- ' ', 7~;~
t via drive shaft 6. The support member 8 mounted on the disc pivots outward---ly about the shaft 9, under the influence of centrifugal force. Simultaneous-ly with this movement, the rotary shaft lOa for the rotary blade 7a moves ;`
along the arcuate slot 14 in the disc 3 ancl roller 15, which is mounted on the shaft lOa is pressed into engagement with the inside surface of the stat~
ionary ring 5.
Roller 15 rolls along the inside surface of the ring 5 so as torotate the shaft lOa. Consequently, the blade 7a rotates with shaft lOa and revolves about the axis of shaft 6 in a planetary movement. Because of the planetary movement of the blade 7a, ~he other blade 7b3 which is biased into engagement with blade 7a by spring 13, rotates in a direction opposite to that of blade 7a. Thus, through this mutual contact, a relative rotat-ing and sliding motion is effected between the superposed blade edges of the two rotary blades and lawn mowing is performed.
As described above, two parallel shafts lOa, lOb for respective disc-like blades, 7a, 7b are mounted on a support member 8 such that the shafts rotate independently. A biasing spring 13 is applied to one shaft, lOb, i~
so that the blade 7b mounted on that shact is pressed into engagement with the other blade 7a for taking in and cutting the lawn. In this way~ since a ; -pair of two rotary blades can be rotated in opposite directions, there is no need to -provide a dri~ing gear as is-used in the prior apparatus and, thus, the support member can be designed smaller and lighter than the prior one. `~
Therefore, the contrifugal force applied to the support member at the time of starting the mower, is reduced. In additiong the shock and noise generated at the moment when the roller 15 contacts the flange 5 is reduced.
Further, since the force applied by roller 15 on the flange 5 can be small during operation of the mower, the roller can be used for long periods without being worn out or damaged. In additiona the noise generated when the roller rolls along the flange can be reduced.
. .. . . ...... . . . . . ... . . ........ . ..................... .
.. ~ .. , . . .. - . , .. . , , : : , , : , - .. , , ; . , . . : ., .::
Also, since a driving gear is not used, the structure of the support member and cutter shaft assembly is simplified and, therefore, the machine, which has an excellent service life, can be produced a~ a low cost.
- ` - 6 -.,
Claims (5)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A lawn mower comprising: a housing having an open bottom; a ring member mounted within the housing with its axis upright; a rotor within the housing, mounted for rotation about the axis of the ring member; a support member pivotally mounted on the rotor for rotation about an upright axis;
two blade shafts journalled to the support member for independent rotation about respective upright axes; two disc-like blades mounted on the lower ends of respective ones of the blade shafts, beneath the support member, the blades having overlapping cutting edges; a roller mounted on one of the blade shafts, at the level of the ring member; resilient means coupled to the other of the blade shafts to bias its blade into engagement with the blade of the one blade shaft such that rotation of the one blade shaft and its blade in one direction will cause a rotation of the other blade in the opposite direction;
and means for rotating the rotor, the positioning of the ring member, the axis of the support member and the blade shafts being such that upon rotation of the rotor, the support member will pivot about its axis under the unflu-ence of centrifugal force until the roller comes into engagement with the inside of the ring member to cause rotation of the roller, the one blade shaft and its blade about the axis of the one blade shaft, and, via engage-ment of the blades, rotation of the other blade.
two blade shafts journalled to the support member for independent rotation about respective upright axes; two disc-like blades mounted on the lower ends of respective ones of the blade shafts, beneath the support member, the blades having overlapping cutting edges; a roller mounted on one of the blade shafts, at the level of the ring member; resilient means coupled to the other of the blade shafts to bias its blade into engagement with the blade of the one blade shaft such that rotation of the one blade shaft and its blade in one direction will cause a rotation of the other blade in the opposite direction;
and means for rotating the rotor, the positioning of the ring member, the axis of the support member and the blade shafts being such that upon rotation of the rotor, the support member will pivot about its axis under the unflu-ence of centrifugal force until the roller comes into engagement with the inside of the ring member to cause rotation of the roller, the one blade shaft and its blade about the axis of the one blade shaft, and, via engage-ment of the blades, rotation of the other blade.
2. A lawn mower according to claim 1 wherein the rotor is a disc positioned beneath the ring member.
3. A lawn mower according to claim 1 wherein the ring member is a cylindrical flange mounted on the underside of a top wall of the housing.
4. A lawn mower according to claim 2 wherein the rotor is larger in diameter than the ring member and the one blade shaft projects upwardly through an arcuate slot in the rotor so as to permit rotation of the support member about its axis.
5. A lawn mower according to claim 1, 2 or 3 wherein the blade shafts lie in a common plane substantially radial to the axis of rotation of the rotor when the roller is in driven engagement with the ring member.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9180276A JPS5317142A (en) | 1976-07-31 | 1976-07-31 | Lawn mower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1041773A true CA1041773A (en) | 1978-11-07 |
Family
ID=14036740
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA267,763A Expired CA1041773A (en) | 1976-07-31 | 1976-12-13 | Lawn mower |
Country Status (13)
| Country | Link |
|---|---|
| JP (1) | JPS5317142A (en) |
| AT (1) | AT365398B (en) |
| AU (1) | AU502688B2 (en) |
| BE (1) | BE849084A (en) |
| CA (1) | CA1041773A (en) |
| DE (1) | DE2649589A1 (en) |
| DK (1) | DK554576A (en) |
| FR (1) | FR2360235A2 (en) |
| GB (1) | GB1520170A (en) |
| IT (1) | IT1084609B (en) |
| NL (1) | NL7704181A (en) |
| NO (1) | NO141143C (en) |
| SE (1) | SE420887B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56165861A (en) * | 1980-05-26 | 1981-12-19 | Taihei Giken Kogyo Kk | Director toward heat source for solar energy collector |
| JPS572958A (en) * | 1980-06-09 | 1982-01-08 | Nippon Telegr & Teleph Corp <Ntt> | Sun tracking device for heat collector |
| DE3324102A1 (en) * | 1983-07-05 | 1985-01-17 | Claas Saulgau GmbH, 7968 Saulgau | HARVESTING DEVICE FOR ROWED CROPS, LIKE MAIZE |
-
1976
- 1976-07-31 JP JP9180276A patent/JPS5317142A/en active Granted
- 1976-10-29 DE DE19762649589 patent/DE2649589A1/en not_active Ceased
- 1976-11-01 AU AU19194/76A patent/AU502688B2/en not_active Expired
- 1976-11-24 AT AT0872476A patent/AT365398B/en not_active IP Right Cessation
- 1976-12-03 BE BE6045784A patent/BE849084A/en unknown
- 1976-12-10 DK DK554576A patent/DK554576A/en unknown
- 1976-12-13 NO NO764219A patent/NO141143C/en unknown
- 1976-12-13 CA CA267,763A patent/CA1041773A/en not_active Expired
- 1976-12-16 GB GB52494/76A patent/GB1520170A/en not_active Expired
- 1976-12-20 FR FR7638375A patent/FR2360235A2/en active Granted
-
1977
- 1977-03-28 IT IT21739/77A patent/IT1084609B/en active
- 1977-04-18 NL NL7704181A patent/NL7704181A/en not_active Application Discontinuation
- 1977-05-13 SE SE7705642A patent/SE420887B/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| SE420887B (en) | 1981-11-09 |
| AT365398B (en) | 1982-01-11 |
| BE849084A (en) | 1977-04-01 |
| AU502688B2 (en) | 1979-08-02 |
| ATA872476A (en) | 1981-06-15 |
| JPS5413367B2 (en) | 1979-05-30 |
| DK554576A (en) | 1978-02-01 |
| DE2649589A1 (en) | 1978-02-02 |
| IT1084609B (en) | 1985-05-25 |
| AU1919476A (en) | 1978-05-11 |
| NO764219L (en) | 1978-02-01 |
| JPS5317142A (en) | 1978-02-16 |
| NO141143C (en) | 1980-01-23 |
| FR2360235A2 (en) | 1978-03-03 |
| SE7705642L (en) | 1978-02-27 |
| NL7704181A (en) | 1978-02-02 |
| FR2360235B2 (en) | 1981-06-19 |
| GB1520170A (en) | 1978-08-02 |
| NO141143B (en) | 1979-10-15 |
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