POWERED CHAIR WITH INDEPENDENT SEAT

Abstract

A powered chair comprises a chair framework, which includes a pair of oppositely disposed armrests, a chair seat frame which is fixedly connected to the pair of armrests, a footrest, a backrest, a first linear actuator mounted upon the pair of armrests and operatively connected to the footrest, and a second linear actuator mounted upon the armrests and operatively connected to the backrest. When the first and second linear actuators are actuated, they can respectfully actuate or move the footrest and backrest, however, in view of the fact that the first and second linear actuators are not operatively connected to the chair seat frame, and in view of the additional fact that the chair seat frame is fixedly mounted upon the pair of armrests, the chair seat frame will remain stationary despite movements of the footrest and backrest, to any one of their multiple positions, as a result of the actuation of the first and second linear actuators.

Claims

1. A powered chair, comprising: a pair of oppositely disposed armrests; a chair seat frame fixedly secured to said pair of oppositely disposed armrests; a backrest pivotally mounted upon said pair of oppositely disposed armrests; a footrest pivotally mounted upon said pair of oppositely disposed armrests; and a linear actuator operatively connected to said footrest so as to move said footrest between retracted and extended positions, whereby, since said chair seat frame is fixedly mounted upon said pair of oppositely disposed armrests, said chair seat frame will remain stationary despite movement of said footrest between said retracted and extended positions by said linear actuator.

2. The powered chair as set forth in claim 1, wherein: a first cross-bar member is fixedly mounted upon said pair of oppositely disposed armrests; a second cross-bar member is pivotally mounted upon said pair of oppositely disposed armrests; and said linear actuator has first and second oppositely disposed ends thereof pivotally mounted upon said first and second cross-bar members.

3. The powered chair as set forth in claim 2, wherein: said second cross-bar member is operatively connected to said footrest by a plurality of linkage members.

4. The powered chair as set forth in claim 1, wherein: said footrest comprises a main primary footrest, and an auxiliary secondary footrest operatively connected to said main primary footrest such that when said footrest is moved to said extended position, said main primary footrest and second auxiliary secondary footrest can adequately support the feet of chair users or occupants who are relatively large in stature.

5. The powered chair as set forth in claim 1, wherein: a plurality of feet elevate said powered chair sufficiently above a support surface upon which said powered chair is disposed so as to permit robotic cleaning appliances to clean the portion of the support surface which is disposed beneath said powered chair.

6. A powered chair, comprising: a pair of oppositely disposed armrests; a chair seat frame fixedly secured to said pair of oppositely disposed armrests; a backrest pivotally mounted upon said pair of oppositely disposed armrests; a footrest pivotally mounted upon said pair of oppositely disposed armrests; and a linear actuator operatively connected to said backrest so as to move said backrest between upright and reclined positions, whereby, since said chair seat frame is fixedly mounted upon said pair of oppositely disposed armrests, said chair seat frame will remain stationary despite movement of said backrest between said upright and reclined positions by said linear actuator.

7. The powered chair as set forth in claim 6, wherein: a first cross-bar member is fixedly mounted upon said pair of oppositely disposed armrests; a second cross-bar member is pivotally mounted upon said pair of oppositely disposed armrests; and said linear actuator has first and second oppositely disposed ends thereof pivotally mounted upon said first and second cross-bar members.

8. The powered chair as set forth in claim 7, wherein: said second cross-bar member is operatively connected to said backrest by a pair of oppositely disposed backrest mounting brackets.

9. The powered chair as set forth in claim 8, wherein: a pair of oppositely disposed mounting brackets are fixedly mounted upon said pair of oppositely disposed armrests, a pair of oppositely disposed backrest support brackets are fixedly mounted upon said pair of oppositely disposed mounting brackets, and said pair of oppositely disposed backrest mounting brackets are pivotally mounted upon said pair of oppositely disposed backrest support brackets.

10. The powered chair as set forth in claim 9, wherein: a pair of oppositely disposed stop pins are respectively mounted upon said pair of oppositely disposed backrest support brackets so as to limit the degree to which said backrest can be reclined from said upright position when said linear actuator moves said backrest from said upright position to said reclined position as a result of moving said backrest mounting brackets.

11. The powered chair as set forth in claim 6, wherein: a plurality of feet elevate said powered chair sufficiently above a support surface upon which said powered chair is disposed so as to permit robotic cleaning appliances to clean the portion of the support surface which is disposed beneath said powered chair.

12. A powered chair, comprising: a pair of oppositely disposed armrests; a chair seat frame fixedly secured to said pair of oppositely disposed armrests; a backrest pivotally mounted upon said pair of oppositely disposed armrests; a footrest pivotally mounted upon said pair of oppositely disposed armrests; and a first linear actuator operatively connected to said footrest so as to move said footrest between retracted and extended positions; and a second linear actuator operatively connected to said backrest so as to move said backrest between upright and reclined positions; whereby, since said chair seat frame is fixedly mounted upon said pair of oppositely disposed armrests, said chair seat frame will remain stationary despite movement of said footrest between said retracted and extended positions by said first linear actuator, as well as despite movement of said backrest between said upright and reclined positions by said second linear actuator.

13. The powered chair as set forth in claim 12, wherein: a first cross-bar member is fixedly mounted upon said pair of oppositely disposed armrests; a second cross-bar member is pivotally mounted upon said pair of oppositely disposed armrests; and said first linear actuator has first and second oppositely disposed ends thereof pivotally mounted upon said first and second cross-bar members.

14. The powered chair as set forth in claim 13, wherein: said second cross-bar member is operatively connected to said footrest by a plurality of linkage members.

15. The powered chair as set forth in claim 12, wherein: said footrest comprises a main primary footrest, and an auxiliary secondary footrest operatively connected to said main primary footrest such that when said footrest is moved to said extended position, said main primary footrest and second auxiliary secondary footrest can adequately support the feet of chair users or occupants who are relatively large in stature.

16. The powered chair as set forth in claim 12, wherein: a plurality of feet elevate said powered chair sufficiently above a support surface upon which said powered chair is disposed so as to permit robotic cleaning appliances to clean the portion of the support surface which is disposed beneath said powered chair.

17. The powered chair as set forth in claim 12, wherein: a third cross-bar member is fixedly mounted upon said pair of oppositely disposed armrests; a fourth cross-bar member is pivotally mounted upon said pair of oppositely disposed armrests; and said second linear actuator has first and second oppositely disposed ends thereof pivotally mounted upon said third and fourth cross-bar members.

18. The powered chair as set forth in claim 17, wherein: said fourth cross-bar member is operatively connected to said backrest by a pair of oppositely disposed backrest mounting brackets.

19. The powered chair as set forth in claim 18, wherein: a pair of oppositely disposed mounting brackets are fixedly mounted upon said pair of oppositely disposed armrests, a pair of oppositely disposed backrest support brackets are fixedly mounted upon said pair of oppositely disposed mounting brackets, and said pair of oppositely disposed backrest mounting brackets are pivotally mounted upon said pair of oppositely disposed backrest support brackets.

20. The powered chair as set forth in claim 19, wherein: a pair of oppositely disposed stop pins are respectively mounted upon said pair of oppositely disposed backrest support brackets so as to limit the degree to which said backrest can be reclined from said upright position when said second linear actuator moves said backrest from said upright position to said reclined position as a result of moving said backrest mounting brackets.

Description

BRIEF DESCRIPTIONS OF THE DRAWINGS

[0008] Various other features and attendant advantages of the present invention will be more fully appreciated from the following detailed description when considered in connection with the accompanying drawings in which like reference characters designate like or corresponding parts throughout the several views, and wherein:

[0009] FIG. 1 is a left side, top perspective view of the new and improved powered chair as constructed in accordance with the principles and teachings of the present invention, and showing the powered chair when the footrest and backrest components have been moved to their extended and reclined positions;

[0010] FIG. 2 is a left side, top perspective view of the new and improved powered chair showing the first linear actuator operatively connected to the footrest component of the powered chair and when the first linear actuator has been actuated so as to extend the footrest component from its retracted position to its extended position;

[0011] FIG. 3 is a left side, bottom perspective view of the new and improved powered chair showing the first linear actuator operatively connected to the footrest component of the powered chair and when the first linear actuator has been actuated so as to extend the footrest component from its retracted position to its extended position;

[0012] FIG. 4 is a schematic detailed view showing how the first linear actuator is operatively connected to the footrest component of the powered chair by means of a plurality of linkage members;

[0013] FIG. 5 is an enlarged schematic detailed view showing how the plurality of linkage members operatively connecting the first linear actuator to the footrest component of the powered chair;

[0014] FIG. 6 is a schematic detailed view showing how the second linear actuator is operatively connected to the backrest component of the powered chair by means of a plurality of linkage members and cross-bar members;

[0015] FIG. 7 is an enlarged detailed view of one of the linkage members, as illustrated within FIG. 6, operatively connecting the second linear actuator to the backrest component of the powered chair; and

[0016] FIG. 8 is a left side, top perspective view of the new and improved powered chair, as constructed in accordance with the principles and teachings of the present invention, and similar to that show in FIG. 1, wherein the footrest and backrest components of the powered chair have been moved to their retracted and upright positions.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

[0017] Referring now to the drawings, and more particularly to FIGS. 1-5 thereof, a new and improved powered chair, as constructed in accordance with the principles and teachings of the present invention, is disclosed and is generally indicated by the reference character 100. More particularly, it is seen that the new and improved powered chair 100 comprises a pair of left and right, oppositely disposed armrests 102,102, a chair seat frame 104 which is adapted to be fixedly secured to the pair of oppositely disposed armrests 102,102, a backrest 106 which is movable between upright and reclined positions, a footrest 108 which is movable between extended and retracted positions, and a first linear actuator 110 which is operatively connected to the footrest 108 so as to move the footrest 108 between its extended and retracted positions. As can best be seen in FIG. 4, the first linear actuator 110 has its motor end 112 pivotally mounted upon a first, transversely extending cross-bar 114 by means of a first clevis-type connector 116, while the oppositely disposed end portions of the first cross-bar 114 are fixedly connected to rear, inner surface portions of the pair of left and right, oppositely disposed armrests 102,102 by means of suitable mounting brackets 118,118 as can best be seen in FIG. 2. In a similar manner, and as can best be seen in FIG. 4, the telescopic rod 120 of the first linear actuator 110 is pivotally connected to a second, transversely extending cross-bar 122 by means of a second clevis-type connector 124. In addition, as can best be appreciated from FIGS. 4 and 5, first end portions of a pair of oppositely disposed first linkage members 126,126 are pivotally mounted upon a pair of oppositely disposed mounting brackets 128,128 by means of suitable pivotal connections 130,130, while the pair of oppositely disposed mounting brackets 128,128 are fixedly mounted upon forward, inner surface portions of the pair of left and right, oppositely disposed armrests 102,102.

[0018] Second, opposite end portions of the pair of oppositely disposed first linkage members 126,126 are pivotally connected to a pair of oppositely disposed second linkage members 132,132 by means of suitable pivotal connections 134,134, while second, opposite end portions of the pair of oppositely disposed second linkage members 132,132 are pivotally connected to the footrest 108 by means of suitable pivotal connections schematically illustrated at 136,136. It is also noted that the oppositely disposed end portions of the second cross-bar 122 are fixedly connected to the pair of oppositely disposed first linkage members 126,126 by means of suitable, L-shaped mounting brackets 138,138. Still further, first end portions of a pair of oppositely disposed third linkage members 140,140 are pivotally mounted upon the pair of oppositely disposed mounting brackets 128,128 by means of suitable pivotal connections 142,142, while second, opposite end portions of the pair of oppositely disposed third linkage members 140,140 are pivotally connected to a pair of oppositely disposed fourth linkage members 144,144 by means of suitable pivotal connections 146,146. Second, opposite end portions of the pair of oppositely disposed fourth linkage members 144,144 are pivotally connected to the footrest 108 by means of suitable pivotal connections schematically illustrated at 146,146, and in this manner, when the first linear actuator 110 is actuated so as to extend or retract the footrest 108, the footrest 108 will be extended or retracted by means of the first, second, third, and fourth linkage members 126,132,140, and 144, however, since the first linear actuator 110 is operatively connected to the pair of left and right, oppositely disposed armrests 102,102, and not operatively connected to the chair seat frame 104, movements of the footrest 108 will be entirely independent from the chair seat frame 104, or, in other words, whenever the footrest 108 undergoes any extension or retraction movements, the chair seat frame 104 will remain stationary.

[0019] Continuing further, and with reference being made to FIGS. 6 and 7 of the drawings, it is seen that the new and improved powered chair 100 of the present invention further includes a second linear actuator 148, wherein the motor end 150 of the second linear actuator 148 is pivotally mounted upon a third, transversely extending cross-bar 152 by means of a suitable third clevis-type connector 154, while the extensible/retractable telescopic rod end 156 of the second linear actuator 148 is pivotally mounted upon a fourth, transversely extending cross-bar 158 by means of a suitable fourth clevis-type connector 160. It is further seen that oppositely disposed end portions of the third, transversely extending cross-bar 152 are fixedly mounted within a pair of oppositely disposed mounting brackets 162,162, and that the pair of oppositely disposed mounting brackets 162,162 are adapted to be fixedly mounted upon central, inner surface portions of the pair of left and right, oppositely disposed armrests 102,102. A pair of oppositely disposed backrest mounting brackets 164,164 are provided such that upper end portions 166,166 of the pair of oppositely disposed backrest mounting brackets 164,164 are adapted to have the backrest 106 fixedly mounted thereon, while lower end portions of the pair of oppositely disposed backrest mounting brackets 164,164 are provided with L-shaped mounting bracket sections 168,168 which are adapted to be fixedly connected to opposite end portions of the fourth, transversely extending cross-bar 158. Still yet further, it is seen that the pair of oppositely disposed backrest mounting brackets 164,164 are pivotally mounted upon a pair of oppositely disposed backrest support brackets 170,170 by means of suitable pivot pin mechanisms 172,172, and that, in turn, the pair of oppositely disposed backrest support brackets 170,170 are fixedly mounted upon a pair of oppositely disposed mounting brackets 174,174 which are fixedly secured to rear, inner surface portions of the powered chair armrests 102,102. It is lastly seen that each one of the pair of oppositely disposed backrest support brackets 170,170 is provided with an inwardly extending stop pin 176. In this manner, when the telescopic rod member 156 of the second linear actuator 148 is extended, the backrest mounting brackets 164,164 are moved forwardly such that the backrest 106 will be disposed at its upright position, as illustrated within FIG. 8, while when the second linear actuator 148 is retracted, the backrest mounting brackets 164,164 are moved rearwardly such that the backrest 106 will be disposed at its reclined position, as illustrated within FIG. 1, the extent to which the backrest 106 is permitted to be reclined being determined as a result of the pair of oppositely disposed backrest mounting brackets 164,164 engaging the stop pins 176. As was the case with the first linear actuator 110 and the footrest 108, when the second linear actuator 148 is actuated so as to extend or retract the backrest 106, the backrest 106 will be extended or retracted by means of the backrest mounting brackets 164,164, however, since the second linear actuator 148 is operatively connected to the pair of left and right, oppositely disposed armrests 102,102, and not operatively connected to the chair seat frame 104, movements of the backrest 106 will be entirely independent from the chair seat frame 104, or, in other words, whenever the backrest 106 undergoes any extension or retraction movements, the chair seat frame 104 will remain stationary.

[0020] Continuing further, and with reference being made to FIGS. 1-3, it is seen that it is further seen that, as a desirable option, an auxiliary or secondary footrest 178 may be provided in conjunction with the main or primary footrest 108 and is operatively connected thereto by means of a pair of oppositely disposed fifth linkage members 180,180 as can best be seen in FIG. 3. As can also be appreciated from FIG. 3, the pivotal connections 136,136,146, 146 of the second and fourth linkage members 132,144 are actually pivotally connected to a pair of oppositely disposed mounting brackets 182,182 which have substantially L-shaped cross-sectional configurations whereby the pair of oppositely disposed mounting brackets 182,182 are fixedly mounted upon undersurface portions of the main or primary footrest 108, the pair of operatively disposed fifth linkage members 180,180 also being operatively connected to the pair of oppositely disposed mounting brackets 182,182. It is to be appreciated that as a result of the provision of the auxiliary or secondary footrest 178 upon the powered chair 100, and when the main or primary footrest 108, together with the auxiliary or secondary footrest 178, are moved to their extended positions, as illustrated within FIGS. 1-3, chair users or occupants, who are relatively tall in stature, can nevertheless have their feet properly and adequately supported when they are seated within the powered chair 100.

[0021] With reference lastly being made to FIGS. 1 and 8, it is lastly noted that the new and improved powered chair 100 is provided with a plurality of feet 184, at the four corners of the powered chair 100, wherein the plurality of feet 184 effectively elevate the powered chair 100, with respect to the underlying floor or surface upon which the powered chair 100 is disposed, so as to permit modern cleaning appliances, such as, for example, well-known floor-cleaning robots, not shown, to be capable of moving freely beneath the powered chair 100 so as to clean the floor surface which is disposed beneath the powered chair 100.

[0022] Obviously, many variations and modifications of the present invention are possible in light of the above teachings. It is therefore to be understood that within the scope of the appended claims, the present invention may be practiced otherwise than as specifically described herein.