CA1292937C - Seat reclining mechanism - Google Patents
Seat reclining mechanismInfo
- Publication number
- CA1292937C CA1292937C CA000592667A CA592667A CA1292937C CA 1292937 C CA1292937 C CA 1292937C CA 000592667 A CA000592667 A CA 000592667A CA 592667 A CA592667 A CA 592667A CA 1292937 C CA1292937 C CA 1292937C
- Authority
- CA
- Canada
- Prior art keywords
- gears
- sun
- planetary
- reclining mechanism
- seat reclining
- 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 - Fee Related
Links
Landscapes
- Chairs For Special Purposes, Such As Reclining Chairs (AREA)
Abstract
ABSTRACT
A seat reclining mechanism including a cushion arm pivotally connected to a squab arm by a planetary gear arrangement, the planetary gear arrangement including a pair of side by side ring gears, one of the ring gears being secured to the squab arm and the other of the ring gears being secured to the cushion arm, a sun and planetary gear arrangement common to both ring gears, the sun and planetary gear arrangement including radially movable planetary gears surrounding at least one sun gear having a fruso-conical form which is biased in an axial direction so as to urge the planetary gears in a radially outwards direction and into contact with the ring gears.
A seat reclining mechanism including a cushion arm pivotally connected to a squab arm by a planetary gear arrangement, the planetary gear arrangement including a pair of side by side ring gears, one of the ring gears being secured to the squab arm and the other of the ring gears being secured to the cushion arm, a sun and planetary gear arrangement common to both ring gears, the sun and planetary gear arrangement including radially movable planetary gears surrounding at least one sun gear having a fruso-conical form which is biased in an axial direction so as to urge the planetary gears in a radially outwards direction and into contact with the ring gears.
Description
SEAT RECLINING MECHANISM
The present invention relates to a seat reclining mechanism.
In our U.K. Patents 1528357 and 1586869 we disclose a seat reclining mechanism which includes a cushion arm pivotally connected to a squab arm by a planetary gear arrangement. The planetary gear arrangement includes a pair of ~ide by side ring gears, one being secured to the squab arm and the other being qecured to the cushion arm.
A sun gear is provided which is in driving connection with both ring gears via a plurality of planet gears. The pitch of teeth in each of the ring gears is different so that rotation of the planet gearq causes relative rotation between the ring gears.
The planet gears float and it is necessary for there to be an acceptable amount of tolerance between the gear~
in order to enable ~mooth operation. Unfortunately such tolerance al~o results i~ pivotal play between the qquab and ¢ushion arms.
In accordance with one aspect of the present invention such play iq substantially reduced or eliminated by incorporating at least one sun gear having a frusto-conical form, the ~un gear being bia~ed in an axial direction so as to urge the planetary gears in a radially outwards direction and into contact with the ring gears. Accordingly pivotal play between the qquab arm and cuQhion arm is substantially reduced or eliminated.
Preferably a pair of sun gears are provided, both of which are sub~tantially of fruqto-conical form, the pair o~ ~un gear~ being arran~ed with their ~maller diameter axial ends facing one another and such that they are located on opposite axial qides of the planetary gears.
The bia~ing means are arranged such as to urge the two sun gears axially toward one another. Thiq may be ~
Z~37 achieved by having one sun gear a~ially fixed and the other axially movable or both sun gears may be axially movable.
Preferably three planetary gears are provided which are equally spaced about the internal circumference of the ring gears. Three planetary gears are preferred since such an arrangement ensures that each ~un gear will apply an equal radial loading on each planetary gear. However it is to be appreciated that more than three planetary gears may be provided if necessary.
- The mechani~m may also include at least one support member for the planetary gears of the type disclosed in our U.K. patent 1586869. Thus the support member would include for each planetary gear a concave surface. The support member ensures that the planetary gears maintain their circumferential spacing and also restrict radially inward movement of each planetary gear.
Pre~erably the in¢luded angle between the inclined peripheral faae of each un gear and its axis is small, ~or example in the range 2 to 15'.
Preferably, the sun and planetary gears have involute teeth. This facilitates smooth operation of the mechanism.
Various aspects of the present invention aré
hereinafter described with reference to the accompanying drawings, in which:-Figure 1 is a schematic perspective view of avehicle seat including a seat reclining mechanism according to the present invention;
Figure 2 i8 a schematic end view of a seat reclining mechani~m according to the present invention;
Figure 3 i8 a more detailed sectional view taken along line X-X in Figure 2; and Figure 4 is a part sectional view taken along line Y-Y in Figure 2.
lZ~Z937 Figure 5 is a view similar to Figure 3 of an alternative embodiment according to the present invention.
The seat reslining mechanism 10 of the present invention is used to pivotally connect a seat back or squab 8 to a seat cushion 7. Two mechanisms 10 are used per seat, one being located on either side of the seat (only one of which is visible in Figure 1) and each mechanism 10 includes a ~quab arm 13 secured to the frame ~not shown) of the squab and a cushion arm 15 secured to the frame Inot shown) of the cushion. The mechanisms are both driven by a handle 9.
In the embodiment illustrated in Figures 2 to 4 of the drawings, the mechanism includes a first ring gear 12 which ~orms part o~ the ~quab arm 13 (only part of which is visible in Figure 2) and a second ring gear 14 which ~orm~ part of a cushion arm 15 (only part of which is vi~ible in Fi8ure 2). The 3quab and cushion arms are more ~ully illustrated in our U.K. patents 1528357 and 1586869.
The squab and cushion arms are preferably formed ~rom metal plate and the ring gears 12, 14 are preferably formed by a pressing operation. The pre~sing operation provides o~fset wall portions 13a, 15_ which together with the internal walls of the ring gears define a housing for the ~un and planetary gear~ 16 and 18 respectively.
As seen in Figure 2, three planetary gears 18 are provided which are equi-~paced about the internal circumference of the ring gears 12, 14.
As seen in Figure 3, the sun gear 16 is mounted on a drive shaft 20 and is located 80 as to be slightly offset to one axial side of the planetary gears 18.
The ~un gear 16 is located on the drive shaft 20 so as to be rotatable therewith and bears against a shoulder 22. The shaft 20 projects through wall portion 13_ to receive a waQher 24. A spring 25 i~ located between the washer 24 and wall portion 13_ to urge the shaft 20 in an axial dire~tion ~o a~ to urge the sun gear 16 further inbetween the planetary gears 18.
A~ ~een in Figures 3 and 4 the sun gear 16 is of generally frusto-conical ~hape with its narrow end facing the direction of bias caused by ~pring 25. Thus as the sun gear 16 is urged further inbetween the planetary gears it has the effect of urging the planetary gears radially outward and into urged contact with the ring gears 12, 14. The angle of inclination of the peripheral wall of the sun gear 16 i8 preferably about 5O to 10-.
The strength of the ~pring 25 is chosen to ensure that the biasing force i8 greater than the force 8enerated by rotating the drive ~haft during adjustment and which tend~ to ur~e the 8ear axially out of en8a8ement with the planetary gear~. This ensures that the planetarY gear~ are ur~ed radially outwardly during adjustment o~ the mechanism a~ well a~ when the mechani~m i~ atati¢.
It is envisaged that the edges of the planetary géar~ 18 may be chamfered slightly to a~sist axial entry o~ the ~un gear 16 without interfering with the rolling action of the gears.
It will be seen in Figure 1 that the gear profiles are involute. This provide~ for smooth operation of the mechaniqm ~ince the planetary gear~ and ring gear~ are maintained in rolling contact. If de~ired however the gear profiles adopted in our U.K. patent 1528357 and 1586869 may be used.
In Figure 5 there is illustrated an alternative embodiment 100 in whioh 2 sun gear~ 16a,16b are provided.
Embodiment 100 i~ a modi~ication o~ the embodiment 10 and 2imilar parts have been designated by the same reference numerals. In the embodiment o~ Figure 5 both sun gears 16_, 16_ are ~lidably mounted on the drive ~haft 20 and 12Z93~7 are urged axially toward one another by associated coiled cpring~ 110. As for the spring 25, the strength of springs 110 are chosen to provide a bia~ing force greater than the force tending to urge the gears out of axial engagement which i~ generated by rotating the drive shaft.
The drive ~haft 20 includes a main portion 20a which extends through and projects either side of the hinge assembly. The main portion 20_ is preferably fluted to define in cross-section a star shape ~see Figure 2). At one side of the hinge assembly the main portion 20_ is provided with a shoulder 121 which is preferably formed integrally with the main portion 20a. A coil spring 110 is ¢ompressed between the shoulder 121 and sun gear 16a.
This has the effect of biasing sun gear 16a in an axial direction toward sun gear 16k.
At the opposite side of the hin~e assembly the main portion 20_ is provided with a boss 125. The boss 125 includes an internal bore 126 which has a portion having a cross sectional shape complimentary with the main portion 20a and so is rotatable in uniqon therewith. The boss 125iis provided with a shoulder 127 which prevent~
axial movement toward the sun gear 16b and i~ prevented from being axially withdrawn from the shaft portion 20a by me~ns of a clip 128 secured to the main shaft portion 20_.
The boss 125 includes a shoulder 130 and a coiled spring 110 is compressed between shoulder 130 and sun gear 16b. This ha~ the effect of bia~in~ the ~un gear 16b in an axial direction toward sun gear 16a. The boss 125 includes an external flat 131 and ser~es a~ a support for connection of the handle 9 for effecting rotation of the drive shaft 20.
Each sun ~ear 16_, 16_ has a central bore having a cross-sectional shape complimentary with the cross-sectional shape o~ the shaft portion 20a which enables lZ~2937 each sun gear to slide axially along the main shaft portion 20a and yet be rotationally ~ixed relative thereto. Preferably the star shape of the main shaft portion 20a and sun gear bore is chosen to have the ~ame number of star arms a~ the number of teeth as the sun gear, the star arms being being radially aligned with the teeth. This facilitates ensuring that both sun gears 16a, 16_ are correctly aligned during assembly of the mechanism.
However it will be appreciated that other cross-sectional shapes of the main ~haft 20a may be adopted if desired, ~uch as for example a polygonal shape.
Preferably the off-set wall portions 13_, 15_ are provided with further off-set portions 13 ,15_ which are designed to be spaced from gears 16_, 16b by a limited distance ~d' which is chosen to limit axial outward movement o~ sun gears 16_, 16_ so as to ensure that me~hing eneagement between the sun and planetary gears is maintained in the event o~ one or both springs 110 ~ailing. Similarly in the embodiment o~ Figure 2, sun gear 16 is ~paced from a further wall portion 15b to maintain meshing engagement with the planetary gears in the event o~ ~ailure of 3pring 25.
If desired a support member 200 (shown in broken lines in Figures 2,3 and 5) may be included. The support me~ber has concave depressions 201 in each of which a planetary gear is seated. The depressions 201 in the support member 200 serve to restrain radial inward movement of the planetary gears.
As illustrated in the drawings, three planetary gears 18 are preferred. This is because three is the minimum number o~ gears which can be acted upon by the sun gear~s) to ensure that the sun gear(s) apply an equal load to all planetary gear~ irrespective o~ the concentricity o~ the ring gears 12,14 and/or the circularity of each ring gear 12,14.
lZ~Z937 If a larger number of equally spaced planetary gears 18 are to be used, preferably the number is chosen such that no two gears are diametrically opposed ie an odd number of gears is chosen.
In the embodiments described above and illustrated in the drawings, the pivotal movement between the squab and cushion arms is defined and supported by the gear system, ie by the intermeshing of the sun, planetary and ring gears and there is no separate journal for supporting the pivotal movement. It will be appreciated however that the squab and cushion arms could be pivotally corrected by journal formations and that the sun, planetary and ring gears be utilised to cause relative rotation about the pivot only.
The present invention relates to a seat reclining mechanism.
In our U.K. Patents 1528357 and 1586869 we disclose a seat reclining mechanism which includes a cushion arm pivotally connected to a squab arm by a planetary gear arrangement. The planetary gear arrangement includes a pair of ~ide by side ring gears, one being secured to the squab arm and the other being qecured to the cushion arm.
A sun gear is provided which is in driving connection with both ring gears via a plurality of planet gears. The pitch of teeth in each of the ring gears is different so that rotation of the planet gearq causes relative rotation between the ring gears.
The planet gears float and it is necessary for there to be an acceptable amount of tolerance between the gear~
in order to enable ~mooth operation. Unfortunately such tolerance al~o results i~ pivotal play between the qquab and ¢ushion arms.
In accordance with one aspect of the present invention such play iq substantially reduced or eliminated by incorporating at least one sun gear having a frusto-conical form, the ~un gear being bia~ed in an axial direction so as to urge the planetary gears in a radially outwards direction and into contact with the ring gears. Accordingly pivotal play between the qquab arm and cuQhion arm is substantially reduced or eliminated.
Preferably a pair of sun gears are provided, both of which are sub~tantially of fruqto-conical form, the pair o~ ~un gear~ being arran~ed with their ~maller diameter axial ends facing one another and such that they are located on opposite axial qides of the planetary gears.
The bia~ing means are arranged such as to urge the two sun gears axially toward one another. Thiq may be ~
Z~37 achieved by having one sun gear a~ially fixed and the other axially movable or both sun gears may be axially movable.
Preferably three planetary gears are provided which are equally spaced about the internal circumference of the ring gears. Three planetary gears are preferred since such an arrangement ensures that each ~un gear will apply an equal radial loading on each planetary gear. However it is to be appreciated that more than three planetary gears may be provided if necessary.
- The mechani~m may also include at least one support member for the planetary gears of the type disclosed in our U.K. patent 1586869. Thus the support member would include for each planetary gear a concave surface. The support member ensures that the planetary gears maintain their circumferential spacing and also restrict radially inward movement of each planetary gear.
Pre~erably the in¢luded angle between the inclined peripheral faae of each un gear and its axis is small, ~or example in the range 2 to 15'.
Preferably, the sun and planetary gears have involute teeth. This facilitates smooth operation of the mechanism.
Various aspects of the present invention aré
hereinafter described with reference to the accompanying drawings, in which:-Figure 1 is a schematic perspective view of avehicle seat including a seat reclining mechanism according to the present invention;
Figure 2 i8 a schematic end view of a seat reclining mechani~m according to the present invention;
Figure 3 i8 a more detailed sectional view taken along line X-X in Figure 2; and Figure 4 is a part sectional view taken along line Y-Y in Figure 2.
lZ~Z937 Figure 5 is a view similar to Figure 3 of an alternative embodiment according to the present invention.
The seat reslining mechanism 10 of the present invention is used to pivotally connect a seat back or squab 8 to a seat cushion 7. Two mechanisms 10 are used per seat, one being located on either side of the seat (only one of which is visible in Figure 1) and each mechanism 10 includes a ~quab arm 13 secured to the frame ~not shown) of the squab and a cushion arm 15 secured to the frame Inot shown) of the cushion. The mechanisms are both driven by a handle 9.
In the embodiment illustrated in Figures 2 to 4 of the drawings, the mechanism includes a first ring gear 12 which ~orms part o~ the ~quab arm 13 (only part of which is visible in Figure 2) and a second ring gear 14 which ~orm~ part of a cushion arm 15 (only part of which is vi~ible in Fi8ure 2). The 3quab and cushion arms are more ~ully illustrated in our U.K. patents 1528357 and 1586869.
The squab and cushion arms are preferably formed ~rom metal plate and the ring gears 12, 14 are preferably formed by a pressing operation. The pre~sing operation provides o~fset wall portions 13a, 15_ which together with the internal walls of the ring gears define a housing for the ~un and planetary gear~ 16 and 18 respectively.
As seen in Figure 2, three planetary gears 18 are provided which are equi-~paced about the internal circumference of the ring gears 12, 14.
As seen in Figure 3, the sun gear 16 is mounted on a drive shaft 20 and is located 80 as to be slightly offset to one axial side of the planetary gears 18.
The ~un gear 16 is located on the drive shaft 20 so as to be rotatable therewith and bears against a shoulder 22. The shaft 20 projects through wall portion 13_ to receive a waQher 24. A spring 25 i~ located between the washer 24 and wall portion 13_ to urge the shaft 20 in an axial dire~tion ~o a~ to urge the sun gear 16 further inbetween the planetary gears 18.
A~ ~een in Figures 3 and 4 the sun gear 16 is of generally frusto-conical ~hape with its narrow end facing the direction of bias caused by ~pring 25. Thus as the sun gear 16 is urged further inbetween the planetary gears it has the effect of urging the planetary gears radially outward and into urged contact with the ring gears 12, 14. The angle of inclination of the peripheral wall of the sun gear 16 i8 preferably about 5O to 10-.
The strength of the ~pring 25 is chosen to ensure that the biasing force i8 greater than the force 8enerated by rotating the drive ~haft during adjustment and which tend~ to ur~e the 8ear axially out of en8a8ement with the planetary gear~. This ensures that the planetarY gear~ are ur~ed radially outwardly during adjustment o~ the mechanism a~ well a~ when the mechani~m i~ atati¢.
It is envisaged that the edges of the planetary géar~ 18 may be chamfered slightly to a~sist axial entry o~ the ~un gear 16 without interfering with the rolling action of the gears.
It will be seen in Figure 1 that the gear profiles are involute. This provide~ for smooth operation of the mechaniqm ~ince the planetary gear~ and ring gear~ are maintained in rolling contact. If de~ired however the gear profiles adopted in our U.K. patent 1528357 and 1586869 may be used.
In Figure 5 there is illustrated an alternative embodiment 100 in whioh 2 sun gear~ 16a,16b are provided.
Embodiment 100 i~ a modi~ication o~ the embodiment 10 and 2imilar parts have been designated by the same reference numerals. In the embodiment o~ Figure 5 both sun gears 16_, 16_ are ~lidably mounted on the drive ~haft 20 and 12Z93~7 are urged axially toward one another by associated coiled cpring~ 110. As for the spring 25, the strength of springs 110 are chosen to provide a bia~ing force greater than the force tending to urge the gears out of axial engagement which i~ generated by rotating the drive shaft.
The drive ~haft 20 includes a main portion 20a which extends through and projects either side of the hinge assembly. The main portion 20_ is preferably fluted to define in cross-section a star shape ~see Figure 2). At one side of the hinge assembly the main portion 20_ is provided with a shoulder 121 which is preferably formed integrally with the main portion 20a. A coil spring 110 is ¢ompressed between the shoulder 121 and sun gear 16a.
This has the effect of biasing sun gear 16a in an axial direction toward sun gear 16k.
At the opposite side of the hin~e assembly the main portion 20_ is provided with a boss 125. The boss 125 includes an internal bore 126 which has a portion having a cross sectional shape complimentary with the main portion 20a and so is rotatable in uniqon therewith. The boss 125iis provided with a shoulder 127 which prevent~
axial movement toward the sun gear 16b and i~ prevented from being axially withdrawn from the shaft portion 20a by me~ns of a clip 128 secured to the main shaft portion 20_.
The boss 125 includes a shoulder 130 and a coiled spring 110 is compressed between shoulder 130 and sun gear 16b. This ha~ the effect of bia~in~ the ~un gear 16b in an axial direction toward sun gear 16a. The boss 125 includes an external flat 131 and ser~es a~ a support for connection of the handle 9 for effecting rotation of the drive shaft 20.
Each sun ~ear 16_, 16_ has a central bore having a cross-sectional shape complimentary with the cross-sectional shape o~ the shaft portion 20a which enables lZ~2937 each sun gear to slide axially along the main shaft portion 20a and yet be rotationally ~ixed relative thereto. Preferably the star shape of the main shaft portion 20a and sun gear bore is chosen to have the ~ame number of star arms a~ the number of teeth as the sun gear, the star arms being being radially aligned with the teeth. This facilitates ensuring that both sun gears 16a, 16_ are correctly aligned during assembly of the mechanism.
However it will be appreciated that other cross-sectional shapes of the main ~haft 20a may be adopted if desired, ~uch as for example a polygonal shape.
Preferably the off-set wall portions 13_, 15_ are provided with further off-set portions 13 ,15_ which are designed to be spaced from gears 16_, 16b by a limited distance ~d' which is chosen to limit axial outward movement o~ sun gears 16_, 16_ so as to ensure that me~hing eneagement between the sun and planetary gears is maintained in the event o~ one or both springs 110 ~ailing. Similarly in the embodiment o~ Figure 2, sun gear 16 is ~paced from a further wall portion 15b to maintain meshing engagement with the planetary gears in the event o~ ~ailure of 3pring 25.
If desired a support member 200 (shown in broken lines in Figures 2,3 and 5) may be included. The support me~ber has concave depressions 201 in each of which a planetary gear is seated. The depressions 201 in the support member 200 serve to restrain radial inward movement of the planetary gears.
As illustrated in the drawings, three planetary gears 18 are preferred. This is because three is the minimum number o~ gears which can be acted upon by the sun gear~s) to ensure that the sun gear(s) apply an equal load to all planetary gear~ irrespective o~ the concentricity o~ the ring gears 12,14 and/or the circularity of each ring gear 12,14.
lZ~Z937 If a larger number of equally spaced planetary gears 18 are to be used, preferably the number is chosen such that no two gears are diametrically opposed ie an odd number of gears is chosen.
In the embodiments described above and illustrated in the drawings, the pivotal movement between the squab and cushion arms is defined and supported by the gear system, ie by the intermeshing of the sun, planetary and ring gears and there is no separate journal for supporting the pivotal movement. It will be appreciated however that the squab and cushion arms could be pivotally corrected by journal formations and that the sun, planetary and ring gears be utilised to cause relative rotation about the pivot only.
Claims (13)
1. A seat reclining mechanism including a cushion arm pivotally connected to a squab arm by a planetary gear arrangement, the planetary gear arrangement including a pair of side by side ring gears, one of the ring gears being secured to the squab arm and the other of the ring gears being secured to the cushion arm, a sun and planetary gear arrangement common to both ring gears, the sun and planetary gear arrangement including radially movable planetary gears surrounding at least one sun gear having a frusto-conical form which is biased in an axial direction so as to urge the planetary gears in a radially outwards direction and into contact with the ring gears.
2. A seat reclining mechanism according to Claim 1 wherein a pair of sun gears are provided, both of which are of frusto-conical form, the pair of sun gears being arranged with their smaller diameter axial ends facing one another such that they are located on opposite axial sides of the planetary gears, biasing means being provided to urge the two sun gears axially toward one another.
3. A seat reclining mechanism according to Claim 2 wherein one sun gear is axially fixed and the other sun gear is axially movable.
4. A seat reclining mechanism according to Claim 2 wherein both sun gears are axially movable.
5. A seat reclining mechanism according to claim 1 or claim 2 wherein three planetary gears are provided.
6. A seat reclining mechanism according to claim 1 or claim 2 wherein support means are provided for supporting the planetary gears against radial inward movement.
7. A seat reclining mechanism according to claim 1 or claim 2 wherein the included angle between the inclined peripheral face of each sun gear and its axis is preferably in the range of 2° to 15°.
8. A seat reclining mechanism according to claim 1 or claim 2 wherein the sun and planetary gears have involute teeth.
9. A seat reclining mechanism according to claim 1 or claim 2 wherein the peripheral edges of the planetary gears are chamfered.
10. A seat reclining mechanism including a cushion arm pivotally connected to a squab arm by a planetary gear arrangement, the planetary gear arrangement including a pair of side by side ring gears, one of the ring gears being secured to the squab arm and the other of the ring gears being secured to the cushion arm, a sun and planetary gear arrangement common to both ring gears, the sun and planetary gear arrangement including radially movable planetary gears surrounding at least one sun gear having a frusto-conical form which is biased in an axial direction so as to urge the planetary gears in a radially outwards direction and into contact with the ring gears, means for supporting the planetary gears against radial inward movement, the included angle between the inclined peripheral face of each sun gear and its axis being preferably in the range of 2° to 15°.
11. A seat reclining mechanism in accordance with claim 10 wherein three planetary gears are provided.
12. A seat reclining mechanism in accordance with claim 10 wherein the sun and planetary gears have involute teeth.
13. A seat reclining mechanism in accordance with claim 10 wherein the peripheral edges of the planetary gears are chamfered.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000592667A CA1292937C (en) | 1989-03-03 | 1989-03-03 | Seat reclining mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000592667A CA1292937C (en) | 1989-03-03 | 1989-03-03 | Seat reclining mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1292937C true CA1292937C (en) | 1991-12-10 |
Family
ID=4139720
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000592667A Expired - Fee Related CA1292937C (en) | 1989-03-03 | 1989-03-03 | Seat reclining mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1292937C (en) |
-
1989
- 1989-03-03 CA CA000592667A patent/CA1292937C/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |