Adjustable Armrest
In the specification and drawings an armrest is described and shown with an arm, the arm having a support portion and a body portion; a channel extending longitudinally along the support portion, the channel having an open face along at least a portion of its length; and a bracket, the bracket being slidably engaged with the channel. Also in the specification and drawings an armrest is described and shown with an arm, the arm having a support portion and a body portion; and a bracket, the bracket being slidably engaged with the arm such that the lower end of the support portion extends below the bracket when the arm is in a lowered height position.
As shown in the accompanying drawings, an embodiment is an armrest. As shown in
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In an embodiment, the lever 58 has an activating portion 78 (see
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In an embodiment, the activating portion of the lever 58 can be positioned at a distance of about 4 centimeters from the channel bisecting line when the pawl 62 is in locking engagement with the teeth. In another embodiment, the activating portion of the lever 58 can be positioned at a distance of less than about 4 centimeters from the channel bisecting line when the pawl 62 is in locking engagement with the teeth. In still other embodiments, the activating portion of the lever 58 can be positioned at a distance of less than about 6 centimeters from the channel bisecting line when the pawl 62 is in locking engagement with the teeth; less than about 8 centimeters from the channel bisecting line when the pawl 62 is in locking engagement with the teeth; less than about 10 centimeters from the channel bisecting line when the pawl 62 is in locking engagement with the teeth; or less than about 12 centimeters from the channel bisecting line when the pawl 62 is in locking engagement with the teeth.
In an embodiment, the activating portion of the lever 58 can be positioned at a distance of about 3.5 centimeters from the channel bisecting line when the activating portion of the lever 58 is depressed and the pawl 62 is out of locking engagement with the teeth. In another embodiment, the activating portion of the lever 58 can be positioned at a distance of less than about 3.5 centimeters from the channel bisecting line when the activating portion of the lever 58 is depressed and the pawl 62 is out of locking engagement with the teeth. In still other embodiments, the activating portion of the lever 58 can be positioned at a distance of less than about 5.5 centimeters from the channel bisecting line when the activating portion of the lever 58 is depressed and the pawl 62 is out of locking engagement with the teeth; less than about 7.5 centimeters from the channel bisecting line when the activating portion of the lever 58 is depressed and the pawl 62 is out of locking engagement with the teeth; less than about 9.5 centimeters from the channel bisecting line when the activating portion of the lever 58 is depressed and the pawl 62 is out of locking engagement with the teeth; or less than about 11.5 centimeters from the channel bisecting line when the activating portion of the lever 58 is depressed and the pawl 62 is out of locking engagement with the teeth.
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As opposed to the open face of the channel being located in the inner side of the support portion, in an embodiment, the open face of the channel can be located in the outer side of the support portion, with the bracket positioned on the outer side of support portion. The bracket can be slidably engaged with the channel and the bracket can have a plurality of teeth extending through the open face of the channel. In such an embodiment, a beam can interconnect the bracket to a chair. The beam can be positioned so as to allow the arm to move in an upper direction and/or a forward direction and back without coming into contact with the beam. Some or all of the other features and/or limitations described for this embodiment can also be included and/or used in other embodiments described herein. Further, some or all of the other features and/or limitations described herein for other embodiments can also be included and/or used in this embodiment.
In an embodiment, the arm, the lever, the bracket, the teeth of the bracket, and any other component can be made of plastic, resin, fiberglass, metal, wood, foam, or any other suitable material.
In operation of an embodiment, the height position of the arm can be adjusted, such as by a user seated in a chair, by moving the height position of the arm to a raised height position, to a lowered height position, or to an intermediate height position, thereby allowing a user to selectively set the height position of the arm according to his or her personal preference. In an embodiment, the upper end of the lever is depressed in order to overcome the biasing force of the spring, thereby moving the pawl out of locking engagement with the teeth of the bracket. The arm can then be moved to a raised height position, to a lowered height position, or to an intermediate height position, such as by a user pulling upward or pushing downward on the arm, with the bracket slidably traveling in the channel of the arm. Once a desired height position of the arm is reached, the lever is then released and the spring forces the pawl into locking engagement with one or more of the teeth of the bracket. In operation of an embodiment, moving the arm to a raised height position simultaneously moves the arm in both an upper direction and a forward direction.
The embodiments shown in the drawings and described above are exemplary of numerous embodiments that may be made within the scope of the appended claims. It is contemplated that numerous other configurations may be used, and the material of each component may be selected from numerous materials other than those specifically disclosed. In short, it is the applicant's intention that the scope of the patent issuing herefrom will be limited only by the scope of the appended claims.
Claims
1. An armrest for a chair comprising:
- a. an arm, the arm having a support portion and a body portion;
- b. a channel extending longitudinally along the support portion, the channel having an open face along at least a portion of its length; and
- c. a bracket, the bracket being slidably engaged with the channel.
2. The armrest of claim 1 wherein the bracket is mounted to a chair.
3. The armrest of claim 2 wherein the chair comprises a bar interconnecting a chair back to a chair seat, the bracket being mounted to the bar.
4. The armrest of claim 1 wherein the open face of the channel is located in the inner side of the support portion.
5. The armrest of claim 1 wherein the bracket extends through the open face of the channel.
6. The armrest of claim 1 wherein the bracket further comprises a plurality of teeth, the plurality of teeth extending through the open face of the channel.
7. The armrest of claim 6 wherein the plurality of teeth are arranged in a substantially straight line.
8. The armrest of claim 6 further comprising a lever pivotally mounted to the arm, the lever having a pawl for locking engagement with at least one of the plurality of teeth.
9. The armrest of claim 8 wherein the lever is pivotally mounted to the support portion of the arm.
10. The armrest of claim 8 further comprising an aperture extending from the channel and through the front side of the support portion, the pawl lockingly engaged to at least one of the plurality of teeth through the aperture.
11. The armrest of claim 10 wherein the lever further comprises an angled lower end and the aperture further comprises a complimentary angled lower end.
12. The armrest of claim 8 further comprising a spring engaged with the lever, for biasing the pawl into locking engagement with at least one of the plurality of teeth.
13. The armrest of claim 1 further comprising a means for lockably adjusting the height of the arm.
14. The armrest of claim 13 wherein the means for lockably adjusting the height of the arm is a ratchet.
15. The armrest of claim 8 further comprising a rod obstructing the lower end of the channel.
16. The armrest of claim 15 wherein at least one of the plurality of teeth comprises a notch, the notch being adapted to receive the rod.
17. The armrest of claim 1 wherein the bracket further comprises:
- a. a channel engaging member mounted to the bracket, the channel engaging member having a T-shaped cross sectional profile; and
- b. a plurality of teeth mounted to the channel engaging member, the plurality of teeth extending through the open face of the channel.
18. The armrest of claim 1 wherein the channel is oriented at an angle relative to the vertical, such that moving the arm to a raised height position simultaneously moves the arm in both an upper direction and a forward direction.
19. The armrest of claim 1 wherein the support portion and the body portion intersect at an angle of greater than 90 degrees.
20. The armrest of claim 1 wherein the support portion and the body portion intersect at an angle of between about 105 degrees and about 135 degrees.
21. The armrest of claim I wherein the lower end of the support portion extends below the bracket when the arm is in a lowered height position.
22. The armrest of claim 21 wherein the upper end of the support portion extends above the bracket and the lower end of the support portion extends below the bracket, when the arm is in an intermediate height position.
23. The armrest of claim 8 wherein the lever comprises an activating portion, the activating portion being positioned at a distance of less than about 5.5 centimeters from a channel bisecting line, when the activating portion of the lever is depressed and the pawl is out of locking engagement with the plurality of teeth.
24. The armrest of claim 8 wherein the lever comprises an activating portion, the activating portion being positioned at a distance of less than about 11.5 centimeters from a channel bisecting line, when the activating portion of the lever is depressed and the pawl is out of locking engagement with the plurality of teeth.
25. An armrest for a chair comprising:
- a. an arm, the arm having a support portion and a body portion; and
- b. a bracket, the bracket being slidably engaged with the arm such that the lower end of the support portion extends below the bracket when the arm is in a lowered height position.
26. The armrest of claim 25 wherein the upper end of the support portion extends above the bracket and the lower end of the support portion extends below the bracket, when the arm is in an intermediate height position.
27. The armrest of claim 25 wherein the bracket is mounted to a chair.
28. The armrest of claim 27 wherein the chair comprises a bar interconnecting a chair back to a chair seat, the bracket being mounted to the bar.
29. The armrest of claim 25 further comprising a channel extending longitudinally along the support portion, the channel having an open face along at least a portion of its length.
30. The armrest of claim 29 wherein the bracket is slidably engaged with the channel.
31. The armrest of claim 30 wherein the open face of the channel is located in the inner side of the support portion.
32. The armrest of claim 30 wherein the bracket extends through the open face of the channel.
33. The armrest of claim 30 wherein the bracket further comprises a plurality of teeth, the plurality of teeth extending through the open face of the channel.
34. The armrest of claim 33 wherein the plurality of teeth are arranged in a substantially straight line.
35. The armrest of claim 33 further comprising a lever pivotally mounted to the arm, the lever having a pawl for locking engagement with at least one of the plurality of teeth.
36. The armrest of claim 35 wherein the lever is pivotally mounted to the support portion of the arm.
37. The armrest of claim 35 further comprising an aperture extending from the channel and through the front side of the support portion, the pawl lockingly engaged to at least one of the plurality of teeth through the aperture.
38. The armrest of claim 37 wherein the lever further comprises an angled lower end and the aperture further comprises a complimentary angled lower end.
39. The armrest of claim 35 further comprising a spring engaged with the lever, for biasing the pawl into locking engagement with at least one of the plurality of teeth.
40. The armrest of claim 25 further comprising a means for lockably adjusting the height of the arm.
41. The armrest of claim 40 wherein the means for lockably adjusting the height of the arm is a ratchet.
42. The armrest of claim 35 further comprising a rod obstructing the lower end of the channel.
43. The armrest of claim 42 wherein at least one of the plurality of teeth comprises a notch, the notch being adapted to receive the rod.
44. The armrest of claim 30 wherein the bracket further comprises:
- a. a channel engaging member mounted to the bracket, the channel engaging member having a T-shaped cross sectional profile; and
- b. a plurality of teeth mounted to the channel engaging member, the plurality of teeth extending through the open face of the channel.
45. The armrest of claim 30 wherein the channel is oriented at an angle relative to the vertical, such that moving the arm to a raised height position simultaneously moves the arm in both an upper direction and a forward direction.
46. The armrest of claim 25 wherein the support portion and the body portion intersect at an angle of greater than 90 degrees.
47. The armrest of claim 25 wherein the support portion and the body portion intersect at an angle of between about 105 degrees and about 135 degrees.
48. The armrest of claim 35 wherein the lever comprises an activating portion, the activating portion being positioned at a distance of less than about 5.5 centimeters from a channel bisecting line, when the activating portion of the lever is depressed and the pawl is out of locking engagement with the plurality of teeth.
49. The armrest of claim 35 wherein the lever comprises an activating portion, the activating portion being positioned at a distance of less than about 11.5 centimeters from a channel bisecting line, when the activating portion of the lever is depressed and the pawl is out of locking engagement with the plurality of teeth.
Type: Application
Filed: Oct 14, 2009
Publication Date: Apr 14, 2011
Inventor: Niels Diffrient (Ridgefield, CT)
Application Number: 12/579,198
International Classification: A47C 7/54 (20060101);