US20110121626A1 - Lift chair - Google Patents
Lift chair Download PDFInfo
- Publication number
- US20110121626A1 US20110121626A1 US12/927,768 US92776810A US2011121626A1 US 20110121626 A1 US20110121626 A1 US 20110121626A1 US 92776810 A US92776810 A US 92776810A US 2011121626 A1 US2011121626 A1 US 2011121626A1
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- Prior art keywords
- seat portion
- chair
- bracket
- support member
- stand
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- 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.)
- Abandoned
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- 230000003213 activating effect Effects 0.000 claims 1
- 230000005484 gravity Effects 0.000 description 8
- 210000003127 knee Anatomy 0.000 description 8
- 210000002414 leg Anatomy 0.000 description 7
- 239000004744 fabric Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000003292 diminished effect Effects 0.000 description 1
- 210000003414 extremity Anatomy 0.000 description 1
- 239000011094 fiberboard Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 230000001144 postural effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Classifications
-
- 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
- A61G5/10—Parts, details or accessories
- A61G5/14—Standing-up or sitting-down aids
Definitions
- the present invention relates to lift chairs which are used to aid in going from a seated position to a standing position.
- lift chair products There are several lift chair products that are currently in use in the marketplace. Typically, these lift chairs have a single flat seat which is lifted and rotated to allow the user to exit the chair with minimal effort. Additionally, the seat angle allows the occupant's back to be tilted forward, but the hips and knees remain significantly behind the lower legs and feet, which means the occupant's center of gravity also remains behind the occupant's lower legs and feet, limiting the person's ability to safely exit from the chair. This presents an even greater problem particularly with the elderly whose muscles and coordination have diminished with age.
- the present invention is a lift chair which allows the seated occupant to have a significantly more accommodating angle when transferring to a standing position to reduce the possibility of accidentally falling forward or ineffectively managing the weight transfer to a metal walker.
- the present invention specifically addresses the areas of hip or knee related mobility problems, especially among the elderly and obese, who may be living alone or want a degree of independence that does not require assistance from other individuals.
- the present invention is a chair having a first seat portion and a second seat portion pivotally connected to the first seat portion.
- the first seat portion and the second seat portion are movable between a first position and a second position, and the first seat portion and second seat portion are disposed in substantially the same plane when the first seat portion and the second seat portion are in the first position.
- the present invention also includes an actuator for moving the first seat portion and the second seat portion between the first position and the second position, and when the actuator is actuated, the first seat portion pivots relative to the second seat portion such that the first seat portion is located in a different plane relative to the second seat portion.
- FIG. 1 is a perspective view of a lift chair in a first or lowered position, according to the present invention
- FIG. 2 is a perspective view of a lift chair, with the first seat portion positioned at a reward angle as the lift chair begins to move toward a raised position, according to the present invention
- FIG. 3 is a perspective view of a lift chair in a second or raised position, according to the present invention.
- FIG. 4 is a bottom perspective view of a lift chair in a first or lowered position, according to the present invention.
- FIG. 5 is a rear perspective view of a lift chair in a second or raised position, according to the present invention.
- FIG. 6 is a bottom perspective view of a lift chair in a second or raised position, according to the present invention.
- FIG. 7 is a second rear perspective view of a lift chair in a second or raised position, according to the present invention.
- FIG. 8 is a perspective side view of a lift chair in a first or lowered position, according to a second embodiment of the present invention.
- FIG. 9 is a perspective front view of a lift chair in a first or lowered position, according to a second embodiment of the present invention.
- FIG. 10 is a perspective front view of a lift chair in a second or raised position, according to a second embodiment of the present invention.
- FIG. 11 is a perspective side view of a lift chair in a second or raised position, according to a second embodiment of the present invention.
- FIG. 12 is a perspective top view of a lift chair in a first or lowered position, according to a second embodiment of the present invention.
- a stand-up chair according to the present invention is shown in the Figures generally at 10 .
- the chair 10 includes a first seat portion 12 and a second seat portion 14 .
- the first seat portion 12 is connected to the second seat portion 14 with a first hinge 16 .
- the first hinge 16 extends along the entire width of the seat portions 12 , 14 as shown in the Figures.
- Also connected to the first seat portion 12 is a backrest 18 ; the backrest 18 is fixedly connected to the first seat portion 12 , and does not move relative to the first seat portion 12 .
- the backrest 18 includes at least one armrest 20 for supporting the arm of an occupant when sitting in the chair 10 .
- the armrest 20 is also used for support when getting out of the chair 10 to stand up.
- front cross member 36 Connected to the second seat portion 14 is front cross member 36 , and connected to the front cross member 36 is a first front support member 22 and a second front support member 24 .
- the front cross member 36 is connected to the second seat portion 14 with a second hinge 26 .
- the second hinge 26 extends along the entire length of the second seat portion 14 in a similar manner to the first hinge 16 .
- Connected to the first front support member 22 is a first V-bracket 28
- second front support member 24 is a second V-bracket 30 .
- the brackets 28 , 30 are used for supporting the first and second front support members 22 , 24 .
- first pivot bracket 32 Located underneath the first seat portion 12 and the second seat portion 14 in a first pivot bracket 32 , and a second pivot bracket 34 .
- the first pivot bracket 32 is pivotally connected to the first V-bracket 28 through a nut and bolt connection, shown generally at 80 , having a bolt 82 extending through an aperture formed as part of the first pivot support bracket 32 , a washer 84 , an aperture formed as part of the first V-bracket 28 , and a nut 86 .
- the second pivot bracket 34 is pivotally connected to the first seat portion 12 and the second V-bracket 30 .
- the second pivot bracket 34 is pivotally connected to the second V-bracket 30 through another nut and bolt connection, shown generally at 88 , having a bolt 90 extending through an aperture formed as part of the second pivot bracket 34 , a washer 92 , and an aperture formed as part of the second V-bracket 30 , and a nut 94 .
- Each of the pivot brackets 32 , 34 are also pivotally connected to a rear transverse seat support beam 110 .
- the rear transverse seat support beam 110 is part of the first seat portion 12 , and connects to a first seat support beam 112 and a second seat support beam 114 .
- the seat support beams 112 , 114 are connected to a front transverse seat support beam 140 .
- a nut and bolt connection shown generally at 116 , having a bolt 118 extending through an aperture formed as part of the first pivot bracket 32 , a washer 120 , an aperture formed as part of a first flange 122 , an aperture formed as part of a second flange 124 , and a nut 126 ; the flanges 122 , 124 are connected to the rear transverse seat support beam 110 .
- a nut and bolt connection having a bolt 130 extending through an aperture formed as part of the second pivot bracket 34 , a washer 132 , an aperture formed as part of a third flange 134 , an aperture formed as part of a fourth flange 136 , and a nut 138 ; the flanges 134 , 136 are connected to the rear transverse seat support beam 110 .
- a front cross member 36 Connected to the front cross member 36 is a first upper support member 38 and a second upper support member 40 .
- the second hinge 26 is also connected to a lower transverse seat support beam 142 , and the lower transverse seat support beam 142 is connected to a third seat support beam 144 and fourth seat support beam 146 .
- Both of the seat support beams 144 , 146 are connected to an upper transverse seat support beam 148 , where the upper transverse seat support beam 148 is connected to the first hinge 16 .
- first rear support member 42 connected to the first upper support member 38 and the first V-bracket 28
- second rear support member 44 connected to the second upper support member 40 and the second V-bracket 30
- rear cross member 46 connected to both rear support members 42 , 44 to provide additional stability and structural support to the chair 10 .
- Providing additional structural support for the chair 10 is a lower cross member 48 connected to the first and second V-brackets 28 , 30 .
- the lower cross member 48 is also used to support an actuator 50 for changing the positions of the first seat portion 12 and the second seat portion 14 .
- the actuator 50 is pivotally connected to the lower cross member 48 and a first upper cross member 52 which is part of the first seat portion 12 . Additionally, there is a second upper cross member 54 which is connected to each of the pivot brackets 32 , 34 to provide additional stability to the chair 10 , and also help to ensure the brackets 32 , 34 pivot in unison.
- the actuator 50 in this embodiment includes an electric motor 56 connected to the first upper cross member 52 , an upper telescoping member 58 , and a lower telescoping member 60 pivotally connected to the lower cross member 48 .
- the electric motor 56 has a bracket 96 , and the bracket 96 is positioned between two upper flanges 98 connected to the center 100 of the first upper cross member 52 .
- a bolt 102 extends through the upper flanges 98 and the bracket 96 as shown in FIG. 4 , and has a threaded connection with a nut 104 .
- the lower cross member 48 has two lower flanges 106 , and the end of the lower telescoping member 60 is located between the lower flanges 106 .
- a bolt 108 extends through the lower flanges 106 and the lower telescoping member 60 into a nut 109 , and connects the lower telescoping member 60 to the flanges 106 .
- a switch 62 which controls the actuator 50 , and therefore the operation of the electric motor 56 for changing the chair between the first and second position.
- the chair 10 is movable between a first or lowered position, as shown in FIG. 1 , and a second or raised position, as shown in FIG. 3 , and any position there between.
- the seat portions 12 , 14 are in substantially the same plane relative to one another, and the lower telescoping member 60 is substantially and concentrically disposed within the upper telescoping member 58 .
- the center of gravity of the occupant sitting in the chair 10 is positioned substantially over the seat portions 12 , 14 , as opposed to their lower legs and feet.
- the actuator 50 is actuated by the switch 62 to move the chair 10 to the second position; the electric motor 56 is then actuated and applies force to the lower telescoping member 60 , driving the lower telescoping member 60 out of the upper telescoping member 58 .
- the upper telescoping member 58 is connected to the first seat portion 12 near the first upper cross member 52 .
- the pivot brackets 32 , 34 are connected at their lower ends to the forward frame of the chair 10 or V-brackets 28 , 30 , and at their upper ends near the rear of the first seat portion 12 .
- the pivot brackets 32 , 34 begin their movement along an arc forward, pivoting at the point of connection at the V-brackets 28 , 30 . This causes the seat portion 12 to lift off of the upper support members 38 , 40 initially at a rearward angle of about ten degrees.
- the pivot brackets 32 , 34 pivot relative to the V-brackets 28 , 30 and to the first seat portion 12 .
- the pivot brackets 32 , 34 move in unison; the first pivot bracket 32 pivots relative to the first seat portion 12 and the first V-bracket 28 , and the second pivot bracket 34 pivots relative to the first seat portion 12 and the second V-bracket 30 .
- the first seat portion 12 and second seat portion 14 pivot relative to each other about the first hinge 16
- the second seat portion 14 pivots relative to the front cross member 36 about the second hinge 26 because the seat portions 12 , 14 begin to move forward.
- the pivot brackets 32 , 34 pivot relative to the V-brackets 28 , 30 and to the first seat portion 12 .
- the force applied to the first seat portion 12 is from the actuator 50 applying force to the first upper cross member 52 .
- the electric motor 56 continues to drive the lower telescoping member 60 out of the upper telescoping member 58 , the seat portions 12 , 14 and the pivot brackets 32 , 34 continue to pivot the seat portions 12 , 14 until the chair 10 is in the second position.
- the seat portions 12 , 14 are substantially perpendicular relative to one another, and the second seat portion 14 is substantially vertical.
- the first seat portion 12 is substantially parallel to the ground when in the first position, and is also substantially parallel to the ground when in the second position.
- the user can simply rest against the first seat portion 12 , and the armrests 20 .
- the switch 62 is merely activated to actuate the electric motor 56 , and move the lower telescoping member 60 back into the upper telescoping member 58 , thereby causing the pivot brackets 32 , 34 to again pivot relative to the to the V-brackets 28 , 30 and to the first seat portion 12 , the second seat portion 14 to pivot relative to the front cross member 36 , and the seat portions 12 , 14 to pivot relative to one another.
- the chair 10 moves from the second position, as shown in FIG. 3 , back to the first position, as shown in FIG. 1 .
- Another feature incorporated into the present invention is an angle positioning feature. This improves the occupant's stability in the chair 10 during actuation of the chair 10 since it acts to cradle the user back in the chair 10 .
- the first seat portion 12 and the armrests 20 angle rearwardly (where the rear transverse seat support beam 110 is at a lower position in relation to the front transverse seat support beam 140 ) as the chair 10 begins to move toward the second position. This is best shown in FIG. 2 .
- the angle 150 the first seat portion 12 and armrests 20 move is greater than zero, is generally between zero and fifteen degrees, and is preferably about ten degrees.
- This movement is incorporated into the design of the chair 10 to allow the single switch 62 and actuator 50 control all of the movement of the chair 10 .
- This additional feature allows the occupant to use the chair 10 in an angled position if desired, and also helps to secure the occupant in the chair 10 as the chair 10 is moved toward the second position. Thus, the occupant's stability is improved when moving towards the second position and mobility is improved at the end of actuation when entering and exiting the chair 10 .
- This angle positioning feature also removes some of the load from the occupant's spine, improving the comfort of the chair 10 when the occupant is sitting in the chair 10 for extended periods of time.
- a fabric shown generally at 64 , which is used to cover various portions of the chair 10 .
- Including the fabric 64 and side panels 66 not only improves the appearance of the chair 10 , but also helps in preventing objects from entering the area underneath the chair 10 from the sides of the chair 10 .
- Any type of fabric or fiberboard materials may be used and attached to the chair 10 to provide a more finished look, and further hide the actuator 50 from view when looking at the side of the chair 10 , as well as hide the wire which extends from the motor 56 through the chair 10 , as shown in the Figures.
- the user sits on the first seat portion 12 and the second seat portion 14 when sitting in the chair 10 .
- the second seat portion 14 is substantially vertical in relation to the ground, and is substantially perpendicular to the upper support members 38 , 40 ; this positioning provides a stop position where the motor 56 ceases to extend the lower telescoping member 60 out of the upper telescoping member 58 .
- the motor 56 and telescoping members 58 , 60 are all surrounded by the first and second V-brackets 28 , 30 , the upper support members 38 , 40 , the front support members 22 , 24 , and the rear support members 42 , 44 .
- FIGS. 8-12 A second embodiment of the present invention is shown in FIGS. 8-12 , with like numbers referring to like elements.
- the seat portions 12 , 14 were substantially of the same size.
- the seat portions 12 , 14 are not of equal size, such that the first seat portion 12 is larger than the second seat portion 14 .
- the first seat portion 12 has a depth of approximately eleven inches
- the second seat portion 14 has a depth of approximately eight inches, but it is within the scope of the invention that the seats may be of other sizes as well.
- the height of the seat portions 12 , 14 in the first position in this embodiment is approximately eighteen inches, whereas in the previous embodiment the height of the seat portions in the first position is approximately nineteen inches. This allows for the occupant's feet to touch the ground throughout the movement of the chair 10 between the first position and the second position.
- This embodiment of the invention also differs from the first embodiment in that there are no V-brackets 28 , 30 . Instead there is a first vertical support member 68 and a second vertical support member 70 .
- the first vertical support member 68 is connected to the first upper support member 38 and a first lower support member 72 .
- the second vertical support member 70 is connected to the second upper support member 40 and a second lower support member 74 .
- the first lower support member 72 is connected to both the first front support member 22 and the first rear support member 42 ; the second lower support member 74 is connected to both the second front support member 24 and second rear support member 44 .
- the lower cross member 48 is connected to the lower support members 72 , 74 .
- the first pivot bracket 32 is connected to the first vertical support member 68
- the second pivot bracket 34 is connected to the second vertical support member 70 .
- the first seat portion 12 and the armrests 20 are substantially parallel with the ground when the chair 10 is in the second position
- the second embodiment also includes the angle positioning feature as mentioned in the first embodiment. Because the first seat portion 12 is larger, this accommodates an occupant of larger size, and also provides greater support for the occupant when the chair 10 is in the second position.
- the backrest 18 is also larger in this embodiment, compared to the first embodiment.
- the larger backrest 18 and the larger first seat portion 12 allow for the backrest 18 and seat portion 12 to be in the form of a of a COMFORTweb® type of material, providing for greater comfort.
- the actuator is positioned closer to the front of the chair 10 such that the telescoping members 58 , 60 of the actuator 50 are substantially vertical, providing maximum support for the occupant of the chair 10 .
- the first seat portion 12 is able to be parallel to the ground in both the first position and the second position by defining the combined length of the telescoping members 58 , 60 (in the second position) being equal to the combined height of one of the upper support members 38 , 40 from the ground and the depth of the second seat portion 14 (i.e. one of the seat support beams 144 , 146 ).
- the actuator 50 has a retracted length of about 15.25 inches, and a length of about 23.25 inches when the chair 10 is in the raised position.
- the length is defined as the distance between the portion of the bracket 96 of the electric motor 56 that connects to the upper flanges 98 and the portion of the telescoping member 60 that connects to the lower flanges 106 .
- the actuator 50 , pivot brackets 32 , 34 and the seat portions 12 , 14 may be varied in size, as long as the first seat portion 12 is parallel to the ground in both the lowered position and the raised position.
- a fabric 78 is connected to both seat portions 12 , 14 as shown in FIGS. 10 and 11 , which prevents the occupant's limbs or other objects from becoming trapped between the seat portions 12 , 14 .
- this embodiment of the chair 10 is shown without the side panels 66 , the frame portions 76 , which are connected to the armrests 20 , are still shown in the Figures.
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- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Chairs Characterized By Structure (AREA)
- Chair Legs, Seat Parts, And Backrests (AREA)
- Chairs For Special Purposes, Such As Reclining Chairs (AREA)
Abstract
A chair having a first seat portion and a second seat portion pivotally connected to the first seat portion. The first seat portion and the second seat portion are movable between a first or lowered position and a second or raised position, and the first seat portion and second seat portion are disposed in substantially the same plane when the first seat portion and the second seat portion are in the first position. Also included is an actuator for moving the first seat portion and the second seat portion between the first position and the second position, and when the actuator is actuated, the first seat portion pivots relative to the second seat portion such that the first seat portion is located in a different plane relative to the second seat portion.
Description
- This application claims the benefit of U.S. Provisional Application No. 61/281,831, filed Nov. 23, 2009, and U.S. application Ser. No. ______, which claims the benefit of U.S. Provisional Application No. 61/399,745, filed Jul. 16, 2010.
- The present invention relates to lift chairs which are used to aid in going from a seated position to a standing position.
- There are several lift chair products that are currently in use in the marketplace. Typically, these lift chairs have a single flat seat which is lifted and rotated to allow the user to exit the chair with minimal effort. Additionally, the seat angle allows the occupant's back to be tilted forward, but the hips and knees remain significantly behind the lower legs and feet, which means the occupant's center of gravity also remains behind the occupant's lower legs and feet, limiting the person's ability to safely exit from the chair. This presents an even greater problem particularly with the elderly whose muscles and coordination have diminished with age.
- Accordingly there exists a need for an improved lift chair which allows the user to safely enter and exit the chair, and go from a seated position to a standing position, or vice versa.
- The present invention is a lift chair which allows the seated occupant to have a significantly more accommodating angle when transferring to a standing position to reduce the possibility of accidentally falling forward or ineffectively managing the weight transfer to a metal walker. Among other needs, the present invention specifically addresses the areas of hip or knee related mobility problems, especially among the elderly and obese, who may be living alone or want a degree of independence that does not require assistance from other individuals.
- The present invention is a chair having a first seat portion and a second seat portion pivotally connected to the first seat portion. The first seat portion and the second seat portion are movable between a first position and a second position, and the first seat portion and second seat portion are disposed in substantially the same plane when the first seat portion and the second seat portion are in the first position. The present invention also includes an actuator for moving the first seat portion and the second seat portion between the first position and the second position, and when the actuator is actuated, the first seat portion pivots relative to the second seat portion such that the first seat portion is located in a different plane relative to the second seat portion.
- Further areas of applicability of the present invention will become apparent from the detailed description provided hereinafter. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
- The present invention will become more fully understood from the detailed description and the accompanying drawings, wherein:
-
FIG. 1 is a perspective view of a lift chair in a first or lowered position, according to the present invention; -
FIG. 2 is a perspective view of a lift chair, with the first seat portion positioned at a reward angle as the lift chair begins to move toward a raised position, according to the present invention; -
FIG. 3 is a perspective view of a lift chair in a second or raised position, according to the present invention; -
FIG. 4 is a bottom perspective view of a lift chair in a first or lowered position, according to the present invention; -
FIG. 5 is a rear perspective view of a lift chair in a second or raised position, according to the present invention; -
FIG. 6 is a bottom perspective view of a lift chair in a second or raised position, according to the present invention; -
FIG. 7 is a second rear perspective view of a lift chair in a second or raised position, according to the present invention; -
FIG. 8 is a perspective side view of a lift chair in a first or lowered position, according to a second embodiment of the present invention; -
FIG. 9 is a perspective front view of a lift chair in a first or lowered position, according to a second embodiment of the present invention; -
FIG. 10 is a perspective front view of a lift chair in a second or raised position, according to a second embodiment of the present invention; -
FIG. 11 is a perspective side view of a lift chair in a second or raised position, according to a second embodiment of the present invention; and -
FIG. 12 is a perspective top view of a lift chair in a first or lowered position, according to a second embodiment of the present invention. - The following description of the preferred embodiment(s) is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses.
- A stand-up chair according to the present invention is shown in the Figures generally at 10. The
chair 10 includes afirst seat portion 12 and asecond seat portion 14. Thefirst seat portion 12 is connected to thesecond seat portion 14 with afirst hinge 16. Thefirst hinge 16 extends along the entire width of theseat portions first seat portion 12 is abackrest 18; thebackrest 18 is fixedly connected to thefirst seat portion 12, and does not move relative to thefirst seat portion 12. Thebackrest 18 includes at least onearmrest 20 for supporting the arm of an occupant when sitting in thechair 10. Thearmrest 20 is also used for support when getting out of thechair 10 to stand up. - Connected to the
second seat portion 14 isfront cross member 36, and connected to thefront cross member 36 is a firstfront support member 22 and a secondfront support member 24. Thefront cross member 36 is connected to thesecond seat portion 14 with asecond hinge 26. Thesecond hinge 26 extends along the entire length of thesecond seat portion 14 in a similar manner to thefirst hinge 16. Connected to the firstfront support member 22 is a first V-bracket 28, and connected to the secondfront support member 24 is a second V-bracket 30. Thebrackets front support members - Located underneath the
first seat portion 12 and thesecond seat portion 14 in afirst pivot bracket 32, and asecond pivot bracket 34. Thefirst pivot bracket 32 is pivotally connected to the first V-bracket 28 through a nut and bolt connection, shown generally at 80, having abolt 82 extending through an aperture formed as part of the firstpivot support bracket 32, awasher 84, an aperture formed as part of the first V-bracket 28, and anut 86. - The
second pivot bracket 34 is pivotally connected to thefirst seat portion 12 and the second V-bracket 30. Thesecond pivot bracket 34 is pivotally connected to the second V-bracket 30 through another nut and bolt connection, shown generally at 88, having abolt 90 extending through an aperture formed as part of thesecond pivot bracket 34, awasher 92, and an aperture formed as part of the second V-bracket 30, and anut 94. - Each of the
pivot brackets seat support beam 110. The rear transverseseat support beam 110 is part of thefirst seat portion 12, and connects to a firstseat support beam 112 and a secondseat support beam 114. Theseat support beams seat support beam 140. More specifically, there is a nut and bolt connection, shown generally at 116, having abolt 118 extending through an aperture formed as part of thefirst pivot bracket 32, a washer 120, an aperture formed as part of afirst flange 122, an aperture formed as part of asecond flange 124, and anut 126; theflanges seat support beam 110. There is another nut and bolt connection, generally shown at 128, having a bolt 130 extending through an aperture formed as part of thesecond pivot bracket 34, a washer 132, an aperture formed as part of a third flange 134, an aperture formed as part of a fourth flange 136, and a nut 138; the flanges 134,136 are connected to the rear transverseseat support beam 110. - As mentioned above, connected to the
second hinge 26 and thefront support members front cross member 36. Connected to thefront cross member 36 is a firstupper support member 38 and a secondupper support member 40. Thesecond hinge 26 is also connected to a lower transverseseat support beam 142, and the lower transverseseat support beam 142 is connected to a thirdseat support beam 144 and fourthseat support beam 146. Both of theseat support beams seat support beam 148, where the upper transverseseat support beam 148 is connected to thefirst hinge 16. - There is also a pair of rear support members, a first
rear support member 42 connected to the firstupper support member 38 and the first V-bracket 28, and a secondrear support member 44 connected to the secondupper support member 40 and the second V-bracket 30. There is also arear cross member 46 connected to bothrear support members chair 10. Providing additional structural support for thechair 10 is alower cross member 48 connected to the first and second V-brackets lower cross member 48 is also used to support anactuator 50 for changing the positions of thefirst seat portion 12 and thesecond seat portion 14. Theactuator 50 is pivotally connected to thelower cross member 48 and a firstupper cross member 52 which is part of thefirst seat portion 12. Additionally, there is a secondupper cross member 54 which is connected to each of thepivot brackets chair 10, and also help to ensure thebrackets - The
actuator 50 in this embodiment includes anelectric motor 56 connected to the firstupper cross member 52, anupper telescoping member 58, and alower telescoping member 60 pivotally connected to thelower cross member 48. Theelectric motor 56 has abracket 96, and thebracket 96 is positioned between twoupper flanges 98 connected to the center 100 of the firstupper cross member 52. Abolt 102 extends through theupper flanges 98 and thebracket 96 as shown inFIG. 4 , and has a threaded connection with anut 104. Thelower cross member 48 has twolower flanges 106, and the end of thelower telescoping member 60 is located between thelower flanges 106. Abolt 108 extends through thelower flanges 106 and thelower telescoping member 60 into anut 109, and connects thelower telescoping member 60 to theflanges 106. - Located in one of the
armrests 20 is aswitch 62 which controls theactuator 50, and therefore the operation of theelectric motor 56 for changing the chair between the first and second position. - In operation, the
chair 10 is movable between a first or lowered position, as shown inFIG. 1 , and a second or raised position, as shown inFIG. 3 , and any position there between. When in the first position, theseat portions lower telescoping member 60 is substantially and concentrically disposed within theupper telescoping member 58. Also, the center of gravity of the occupant sitting in thechair 10 is positioned substantially over theseat portions - When the
chair 10 is in the first position, and the occupant of thechair 10 would like to stand up, theactuator 50 is actuated by theswitch 62 to move thechair 10 to the second position; theelectric motor 56 is then actuated and applies force to thelower telescoping member 60, driving thelower telescoping member 60 out of theupper telescoping member 58. Theupper telescoping member 58 is connected to thefirst seat portion 12 near the firstupper cross member 52. Thepivot brackets chair 10 or V-brackets first seat portion 12. As pressure is put on the firstupper cross member 52 near the center of theseat portion 12, thepivot brackets brackets seat portion 12 to lift off of theupper support members pivot brackets brackets first seat portion 12. - The
pivot brackets first pivot bracket 32 pivots relative to thefirst seat portion 12 and the first V-bracket 28, and thesecond pivot bracket 34 pivots relative to thefirst seat portion 12 and the second V-bracket 30. As theseat portions upper support members first seat portion 12 andsecond seat portion 14 pivot relative to each other about thefirst hinge 16, and thesecond seat portion 14 pivots relative to thefront cross member 36 about thesecond hinge 26 because theseat portions pivot brackets brackets first seat portion 12. This causes a shift in the occupant's center of gravity to shift upward and toward the front of thechair 10, and therefore shift the center of gravity to a location above the occupant's knees and feet. This essentially shifts the weight of the occupant to a location over the knees and feet, allowing the occupant to exit thechair 10 in a controlled manner, and thus improving the user's mobility while exiting thechair 10. - The force applied to the
first seat portion 12 is from theactuator 50 applying force to the firstupper cross member 52. As theelectric motor 56 continues to drive thelower telescoping member 60 out of theupper telescoping member 58, theseat portions pivot brackets seat portions chair 10 is in the second position. When in the second position, theseat portions second seat portion 14 is substantially vertical. Thefirst seat portion 12 is substantially parallel to the ground when in the first position, and is also substantially parallel to the ground when in the second position. This allows the occupant of thechair 10 to place their knees and lower legs underneath their body such that the occupant's center of gravity is above their knees and feet. Essentially, when thechair 10 is moved from the first position to the second position, the occupant's center of gravity is shifted forward and upward from being behind their knees and lower legs to being above their knees and lower legs, allowing the occupant to exit thechair 10 with minimal effort and maximum safety. - When it is desired to move the
chair 10 from the second position back to the first position (i.e. when an occupant desires to sit in the chair 10), the user can simply rest against thefirst seat portion 12, and thearmrests 20. At this point, the user's center of gravity is underneath their body, and theswitch 62 is merely activated to actuate theelectric motor 56, and move thelower telescoping member 60 back into theupper telescoping member 58, thereby causing thepivot brackets brackets first seat portion 12, thesecond seat portion 14 to pivot relative to thefront cross member 36, and theseat portions chair 10 moves from the second position, as shown inFIG. 3 , back to the first position, as shown inFIG. 1 . - Another feature incorporated into the present invention is an angle positioning feature. This improves the occupant's stability in the
chair 10 during actuation of thechair 10 since it acts to cradle the user back in thechair 10. During the transition from the first position to the second position, thefirst seat portion 12 and thearmrests 20 angle rearwardly (where the rear transverseseat support beam 110 is at a lower position in relation to the front transverse seat support beam 140) as thechair 10 begins to move toward the second position. This is best shown inFIG. 2 . In this embodiment, theangle 150 thefirst seat portion 12 andarmrests 20 move is greater than zero, is generally between zero and fifteen degrees, and is preferably about ten degrees. This movement is incorporated into the design of thechair 10 to allow thesingle switch 62 andactuator 50 control all of the movement of thechair 10. This additional feature allows the occupant to use thechair 10 in an angled position if desired, and also helps to secure the occupant in thechair 10 as thechair 10 is moved toward the second position. Thus, the occupant's stability is improved when moving towards the second position and mobility is improved at the end of actuation when entering and exiting thechair 10. This angle positioning feature also removes some of the load from the occupant's spine, improving the comfort of thechair 10 when the occupant is sitting in thechair 10 for extended periods of time. - It can be seen in the Figures that there is a fabric, shown generally at 64, which is used to cover various portions of the
chair 10. There are also twoside panels 66 which cover theupper support members brackets chair 10. Including thefabric 64 andside panels 66 not only improves the appearance of thechair 10, but also helps in preventing objects from entering the area underneath thechair 10 from the sides of thechair 10. Any type of fabric or fiberboard materials may be used and attached to thechair 10 to provide a more finished look, and further hide the actuator 50 from view when looking at the side of thechair 10, as well as hide the wire which extends from themotor 56 through thechair 10, as shown in the Figures. - Note that the user sits on the
first seat portion 12 and thesecond seat portion 14 when sitting in thechair 10. Having this “split-seat” has several advantages. InFIGS. 2 , and 4-6, when thechair 10 is in the second position and configured to aid a person in standing up, thesecond seat portion 14 is substantially vertical in relation to the ground, and is substantially perpendicular to theupper support members motor 56 ceases to extend thelower telescoping member 60 out of theupper telescoping member 58. Having thesecond seat portion 14 being in a substantially vertical position allows the user to position their legs underneath their body (without any interference from the second seat portion 14) to provide a more postural position when exiting thechair 10, more easily facilitating the shift in the center of gravity for exiting thechair 10. Themotor 56 andtelescoping members brackets upper support members front support members rear support members - A second embodiment of the present invention is shown in
FIGS. 8-12 , with like numbers referring to like elements. In the first embodiment shown inFIGS. 1-7 , theseat portions seat portions first seat portion 12 is larger than thesecond seat portion 14. In this embodiment, thefirst seat portion 12 has a depth of approximately eleven inches, and thesecond seat portion 14 has a depth of approximately eight inches, but it is within the scope of the invention that the seats may be of other sizes as well. Additionally, the height of theseat portions chair 10 between the first position and the second position. - This embodiment of the invention also differs from the first embodiment in that there are no V-
brackets vertical support member 68 and a secondvertical support member 70. The firstvertical support member 68 is connected to the firstupper support member 38 and a firstlower support member 72. The secondvertical support member 70 is connected to the secondupper support member 40 and a secondlower support member 74. Additionally, the firstlower support member 72 is connected to both the firstfront support member 22 and the firstrear support member 42; the secondlower support member 74 is connected to both the secondfront support member 24 and secondrear support member 44. Also in this embodiment, instead of being connected to the V-brackets lower cross member 48 is connected to thelower support members - The
first pivot bracket 32 is connected to the firstvertical support member 68, and thesecond pivot bracket 34 is connected to the secondvertical support member 70. As with the previous embodiment, thefirst seat portion 12 and thearmrests 20 are substantially parallel with the ground when thechair 10 is in the second position, and the second embodiment also includes the angle positioning feature as mentioned in the first embodiment. Because thefirst seat portion 12 is larger, this accommodates an occupant of larger size, and also provides greater support for the occupant when thechair 10 is in the second position. Thebackrest 18 is also larger in this embodiment, compared to the first embodiment. Thelarger backrest 18 and the largerfirst seat portion 12 allow for thebackrest 18 andseat portion 12 to be in the form of a of a COMFORTweb® type of material, providing for greater comfort. - It can also be seen in
FIG. 11 that the actuator is positioned closer to the front of thechair 10 such that thetelescoping members actuator 50 are substantially vertical, providing maximum support for the occupant of thechair 10. This helps to ensure that the stress placed on thetelescoping members telescoping members chair 10 is in the second position. With regard to both embodiments, thefirst seat portion 12 is able to be parallel to the ground in both the first position and the second position by defining the combined length of thetelescoping members 58,60 (in the second position) being equal to the combined height of one of theupper support members actuator 50 has a retracted length of about 15.25 inches, and a length of about 23.25 inches when thechair 10 is in the raised position. The length is defined as the distance between the portion of thebracket 96 of theelectric motor 56 that connects to theupper flanges 98 and the portion of the telescopingmember 60 that connects to thelower flanges 106. However, it is with the scope of the invention that theactuator 50,pivot brackets seat portions first seat portion 12 is parallel to the ground in both the lowered position and the raised position. - A
fabric 78 is connected to bothseat portions FIGS. 10 and 11 , which prevents the occupant's limbs or other objects from becoming trapped between theseat portions chair 10 is shown without theside panels 66, theframe portions 76, which are connected to thearmrests 20, are still shown in the Figures. - It should be noted that the invention described above is similar in operation to the invention described in co-pending U.S. application No. ______, titled “Lift Chair,” to William Lipford, filed contemporaneously herewith on Nov. 23, 2010, the entire specification of which is incorporated herein by reference.
- The description of the invention is merely exemplary in nature and, thus, variations that do not depart from the gist of the invention are intended to be within the scope of the invention. Such variations are not to be regarded as a departure from the spirit and scope of the invention.
Claims (22)
1. A chair comprising:
a first seat portion;
a second seat portion pivotally connected to said first seat portion, said first seat portion and said second seat portion being movable between a first position and a second position, said first seat portion and said second seat portion being disposed in substantially the same plane when said first seat portion and said second seat portion are in said first position; and
an actuator for moving said first seat portion and said second seat portion between said first position and said second position such that when said actuator is actuated, said first seat portion pivots relative to said second seat portion such that said first seat portion is located in a different plane relative to said second seat portion.
2. The chair of claim 1 , wherein said first seat portion is substantially perpendicular to said second seat portion when said first seat portion and said second seat portion are in said second position.
3. The chair of claim 1 , further comprising:
a first hinge for connecting said first seat portion to said second seat portion;
a front cross member; and
a second hinge for connecting said second seat portion to said front cross member such that when said first seat portion is moved by said actuator, said first seat portion pivots relative to said second seat portion about said first hinge, and said second seat portion pivots relative to said front cross member about said second hinge.
4. The chair of claim 3 , further comprising:
a first front support member connected to said front cross member;
a second front support member connected to said front cross member;
a first V-bracket connected to said first front support member to support said first front support member; and
a second V-bracket connected to said second front support member to support said second front support member.
5. The chair of claim 4 , further comprising:
a first rear support member connected to said first V-bracket for supporting said first V-bracket;
a second rear support member connected to said second V-bracket for supporting said second V-bracket; and
a rear cross member connected to said first rear support member and said second rear support member.
6. The standup chair of claim 1 , said actuator further comprising:
an electric motor connected to said first seat portion;
an upper telescoping member connected to said electric motor; and
a lower telescoping member movably disposed within said upper telescoping member such that when said electric motor is actuated to move said first seat portion and said second seat portion from said first position to said second position, said electric motor drives said lower telescoping member out of said upper telescoping member, applying force to said first seat portion.
7. The stand-up chair of claim 6 , wherein said upper telescoping member and said lower telescoping member are substantially vertical when said first seat portion and said second seat portion are in said raised position.
8. The standup chair of claim 1 , further comprising a switch for activating said actuator.
9. The standup chair of claim 1 , wherein said first seat portion is larger compared to said second seat portion.
10. The stand-up chair of claim 1 , wherein said first seat portion is angled by said actuator as said first seat portion and said second seat portion are moved to said raised position.
11. A stand-up chair, comprising:
a first seat portion;
a second seat portion pivotally connected to said first seat portion by a first hinge, and a front cross member by a second hinge, said first seat portion is larger in relation to said second seat portion; and
an actuator pivotally connected to said first seat portion such that when said actuator is actuated, said first seat portion and said second seat portion are moved between a raised position and a lowered position;
wherein said first seat portion is substantially perpendicular to said second seat portion when said first seat portion and said second seat portion are in said raised position.
12. The stand-up chair of claim 11 , further comprising:
a first front support member connected to said front cross member;
a second front support member connected to said front cross member;
a first V-bracket connected to said first front support member;
a second V-bracket connected to said second front support member;
a first pivot bracket pivotally connected to said first seat portion and said first V-bracket; and
a second pivot bracket pivotally connected to said first seat portion and said second V-bracket such that as said actuator moves said first seat portion and said second seat portion between said raised position and said lowered position, said first pivot bracket pivots relative to said first V-bracket, said second pivot bracket pivots relative to said second V-bracket, and said first pivot bracket and said second pivot bracket pivot relative to said first seat portion.
13. The stand-up chair of claim 12 , said actuator further comprising:
an electric motor pivotally connected to said first seat portion;
an upper telescoping member connected to said electric motor; and
a lower telescoping member pivotally connected to a lower cross member and slidingly disposed within said upper telescoping member, said lower cross member connected to said first V-bracket and said second V-bracket such that when said electric motor is activated, said lower telescoping member slides out of said upper telescoping member, moving away from said electric motor and applying a force to said lower cross member, lifting said first seat portion and said second seat portion towards said raised position.
14. The stand-up chair of claim 13 , wherein said upper telescoping member and said lower telescoping member are substantially vertical when said first seat portion and said second seat portion are in said raised position.
15. The stand-up chair of claim 11 , further comprising:
a first upper support member connected to said front cross member; and
a second upper support member connected to said front cross member;
wherein said first upper support member and said second upper support member support said first seat portion and said second seat portion when said first seat portion and said second seat portion are in said lowered position.
16. The stand-up chair of claim 11 , wherein said first seat portion is larger in relation to said second seat portion.
17. The stand-up chair of claim 11 , wherein said first seat portion is angled by said actuator as said first seat portion and said second seat portion are moved to said raised position.
18. A stand-up chair operable for movement between a raised position and a lowered position, comprising:
a first seat portion;
a second seat portion positioned substantially parallel to said first seat portion when said stand-up chair is in said lowered position;
a first hinge pivotally connecting said first seat portion to said second seat portion;
a second hinge;
a front cross member, said second hinge pivotally connecting said front cross member to said second seat portion; and
an actuator operable for changing the position of said first seat portion relative to said second seat portion between said raised position and said lowered position such that when said first seat portion and said second seat portion are in said raised position, said first seat portion is substantially perpendicular to said second seat portion;
wherein said first seat portion is larger in relation to said second seat portion.
19. The stand-up chair operable for movement between a raised position and a lowered position of claim 18 , further comprising:
a first upper support member operable for supporting said first seat portion and said second seat portion;
a second upper support member operable for supporting said first seat portion and said second seat portion;
a first front support member, said front cross member and said first upper support member connected to said first front support member;
a second front support member, said front cross member and said second upper support member connected to said second front support member;
a first V-bracket connected to said first front support member;
a second V-bracket connected to said second front support member;
a first pivot bracket pivotally connected to said first seat portion and said first V-bracket; and
a second pivot bracket pivotally connected to said second seat portion and said first V-bracket such that as said actuator moves said first seat portion and said second seat portion between said raised position and said lowered position, said first pivot bracket pivots relative to said first seat portion and said first V-bracket, and said second pivot bracket pivots relative to said first seat portion and said second V-bracket.
20. The stand-up chair operable for movement between a raised position and a lowered position of claim 19 , said actuator further comprising:
an electric motor pivotally connected to said first seat portion;
an upper telescoping member connected to said electric motor;
a lower telescoping member concentrically disposed within said upper telescoping member; and
a lower cross member connected to said first V-bracket and said second V-bracket, said lower telescoping member pivotally connected to said lower cross member;
wherein as said stand-up chair is moved between said lowered position and said raised position, said electric motor moves said lower telescoping member into and out of said upper telescoping member such that a force is applied to said first seat portion, lifting said first seat portion and said second seat portion off of said first upper support member and said second upper support member.
21. The stand-up chair operable for movement between a raised position and a lowered position of claim 20 , wherein said upper telescoping member and said lower telescoping member are substantially vertical when said stand-up chair is in said raised position.
22. The stand-up chair of claim 18 , wherein said first seat portion is angled by said actuator as said first seat portion and said second seat portion are moved to said raised position.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/927,768 US20110121626A1 (en) | 2009-11-23 | 2010-11-23 | Lift chair |
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US28183109P | 2009-11-23 | 2009-11-23 | |
US39974510P | 2010-07-16 | 2010-07-16 | |
US12/927,768 US20110121626A1 (en) | 2009-11-23 | 2010-11-23 | Lift chair |
Publications (1)
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US20110121626A1 true US20110121626A1 (en) | 2011-05-26 |
Family
ID=44060247
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
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US12/927,768 Abandoned US20110121626A1 (en) | 2009-11-23 | 2010-11-23 | Lift chair |
US12/927,764 Abandoned US20110121625A1 (en) | 2009-11-23 | 2010-11-23 | Lift chair |
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Application Number | Title | Priority Date | Filing Date |
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US12/927,764 Abandoned US20110121625A1 (en) | 2009-11-23 | 2010-11-23 | Lift chair |
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US (2) | US20110121626A1 (en) |
WO (2) | WO2011062646A2 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102885677A (en) * | 2012-10-16 | 2013-01-23 | 佛山市顺德区锡山家具有限公司 | Assistant chair |
US9775757B1 (en) | 2014-03-28 | 2017-10-03 | Rfs Innovation Llc | Lift chair and seat |
GB2561810A (en) * | 2017-01-20 | 2018-10-31 | The Helping Hand Company Ledbury Ltd | Powered seat and related seating improvements |
US20200214916A1 (en) * | 2019-01-04 | 2020-07-09 | Haworth, Inc. | Adjustable ergonomic chair |
US20200337920A1 (en) * | 2018-01-17 | 2020-10-29 | Dan-Rehab A/S | A toilet chair and a method for aiding a person in getting undressed or dressed by means of a toilet chair |
US20220015970A1 (en) * | 2020-07-14 | 2022-01-20 | Gregg Cohen | Lift chair assembly |
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US8991925B2 (en) | 2012-09-12 | 2015-03-31 | La-Z-Boy Incorporated | Furniture member and power lift mechanism |
NZ729426A (en) * | 2014-09-02 | 2019-02-22 | La Z Boy Inc | Furniture member and power recline and lift mechanism |
US11020295B2 (en) | 2015-12-22 | 2021-06-01 | Stryker Corporation | Patient support systems and methods for assisting caregivers with patient care |
US10813806B2 (en) * | 2016-05-24 | 2020-10-27 | Stryker Corporation | Medical support apparatus with stand assistance |
CN107157163B (en) * | 2017-06-19 | 2023-08-04 | 海宁美惠机械有限公司 | Double-motor liftable old man chair |
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- 2010-11-23 WO PCT/US2010/003032 patent/WO2011062646A2/en active Application Filing
- 2010-11-23 WO PCT/US2010/003031 patent/WO2011062645A2/en active Application Filing
- 2010-11-23 US US12/927,768 patent/US20110121626A1/en not_active Abandoned
- 2010-11-23 US US12/927,764 patent/US20110121625A1/en not_active Abandoned
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US4249774A (en) * | 1979-02-22 | 1981-02-10 | Andreasson Sven A | Invalid chair |
US5984411A (en) * | 1995-09-11 | 1999-11-16 | Galumbeck; Michael H. | Elevator chair |
US6912746B2 (en) * | 2001-11-17 | 2005-07-05 | Medi-Plinth Limited | Bed |
US7021713B2 (en) * | 2003-07-25 | 2006-04-04 | Dynamic Healthtech Inc | Seat elevating mechanism for chair |
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Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102885677A (en) * | 2012-10-16 | 2013-01-23 | 佛山市顺德区锡山家具有限公司 | Assistant chair |
US9775757B1 (en) | 2014-03-28 | 2017-10-03 | Rfs Innovation Llc | Lift chair and seat |
GB2561810A (en) * | 2017-01-20 | 2018-10-31 | The Helping Hand Company Ledbury Ltd | Powered seat and related seating improvements |
GB2561810B (en) * | 2017-01-20 | 2022-12-21 | The Helping Hand Company Ledbury Ltd | Powered seat and related seating improvements |
US20200337920A1 (en) * | 2018-01-17 | 2020-10-29 | Dan-Rehab A/S | A toilet chair and a method for aiding a person in getting undressed or dressed by means of a toilet chair |
US11980578B2 (en) * | 2018-01-17 | 2024-05-14 | Dan-Rehab A/S | Toilet chair and a method for aiding a person in getting undressed or dressed by means of a toilet chair |
US20200214916A1 (en) * | 2019-01-04 | 2020-07-09 | Haworth, Inc. | Adjustable ergonomic chair |
US10780003B2 (en) * | 2019-01-04 | 2020-09-22 | Haworth, Inc. | Adjustable ergonomic chair |
US11471345B2 (en) | 2019-01-04 | 2022-10-18 | Haworth, Inc. | Adjustable ergonomic chair |
US20220015970A1 (en) * | 2020-07-14 | 2022-01-20 | Gregg Cohen | Lift chair assembly |
US11819465B2 (en) * | 2020-07-14 | 2023-11-21 | Gregg Cohen | Lift chair assembly |
Also Published As
Publication number | Publication date |
---|---|
WO2011062646A2 (en) | 2011-05-26 |
WO2011062645A2 (en) | 2011-05-26 |
US20110121625A1 (en) | 2011-05-26 |
WO2011062646A3 (en) | 2011-10-06 |
WO2011062645A3 (en) | 2011-10-13 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: SAFETY LIFT CHAIR ASSOCIATES, LLC, MICHIGAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:LIPFORD, WILLIAM D.;REEL/FRAME:025571/0293 Effective date: 20101229 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |