IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0361779
(2006-02-24)
|
등록번호 |
US-7341313
(2008-03-11)
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발명자
/ 주소 |
- Bedford,Adam C.
- Bodnar,David A.
- Karsten,Gary Lee
|
출원인 / 주소 |
- Steelcase Development Corporation
|
대리인 / 주소 |
Price, Heneveld, Cooper, DeWitt & Litton LLP
|
인용정보 |
피인용 횟수 :
6 인용 특허 :
58 |
초록
▼
An armrest includes an armrest support and a subassembly supported thereon for vertical adjustment by a height adjustment device having a rotatable high-lead-angle threaded shaft, a mating nut, and a trigger. The shaft member is rotatable upon a vertical force being placed on the subassembly, and th
An armrest includes an armrest support and a subassembly supported thereon for vertical adjustment by a height adjustment device having a rotatable high-lead-angle threaded shaft, a mating nut, and a trigger. The shaft member is rotatable upon a vertical force being placed on the subassembly, and the trigger engages the shaft to prevent rotation and fix a selected height position. The subassembly includes a housing, an armrest cap, and a pair of swing arms pivoted to each of the housing and cap for adjustably supporting the armrest cap for rotational and translational horizontal movement. Horizontal adjustment is controlled by choice of materials, a frictional wave spring and dampener. Optionally, the armrest cap includes a keyhole slot and one of the links includes a configured protrusion shaped to selectively linearly slide along a long part of the slot . . . or rotate in the circular end of the keyhole slot.
대표청구항
▼
The invention for which a property right and privilege is claimed includes: 1. An armrest for a seating unit comprising: an armrest support adapted for attachment to a seating unit; an armrest cap adapted to support a person's arm, said armrest cap comprising a lower cap member and an upper cap mem
The invention for which a property right and privilege is claimed includes: 1. An armrest for a seating unit comprising: an armrest support adapted for attachment to a seating unit; an armrest cap adapted to support a person's arm, said armrest cap comprising a lower cap member and an upper cap member; a pair of swing arms supporting the lower cap member on the armrest support, each swing arm being pivotally attached at a first location to the lower cap member, and each slidably-and-pivotally attached to the armrest support for adjustably supporting the armrest cap for independent longitudinal, lateral, and rotational adjustment including movement between a forward position where at least half the armrest cap is forward of a midline of the armrest support and a rearward position where at least half the armrest cap is rearward of a midline of the armrest support; and a friction-increasing mechanism attached to at least one of the first locations to increase frictional force resisting horizontal movement of the armrest cap and swing arms when adjusting the armrest cap on the armrest support wherein the friction increasing mechanism comprises a wave compression spring positioned above the lower cap member. 2. The armrest defined in claim 1, further including a viscous dampener operably coupled to the armrest cap and resisting quick movement of the armrest cap relative to the armrest support. 3. The armrest defined in claim 1, wherein the armrest support includes a mounting plate having at least one stop thereon, the stop being positioned to engage the swing arms to limit outer movement of the swing arms, thus limiting outer adjustment of the armrest cap. 4. An armrest for a seating unit comprising: an armrest support; an armrest cap adjustably supported on the armrest support for movement to at least three different positions of use; a viscous dampener engaging the armrest cap and that dampens and smoothes movement of the armrest cap during adjustment, wherein the dampener includes a body defining a cavity that is filled with viscous material and a rotatable shaft that extends into the cavity; and a pair of swing arms supporting a lower cap member on the armrest support, each swing arm being pivotally attached at a first location to the lower cap member, and each slidably-and-pivotally attached to the armrest support for adjustably supporting the armrest cap for independent longitudinal, lateral, and rotational adjustment. 5. The armrest defined in claim 4, wherein the shaft includes teeth that engage a mating surface defining a rack. 6. The armrest defined in claim 4, wherein the dampener comprises a preassembled dash pot. 7. The armrest defined in claim 4, wherein the armrest support has a first vertical section; and including an armrest assembly having a second vertical section telescopingly engaging the first vertical section for vertical adjustment, the armrest assembly incorporating the armrest cap; and a height control including a spiral threaded shaft member on one of the first and second vertical sections, a mating nut member on the other of the first and second vertical sections that operably engages the shaft member, and a trigger; one of the threaded shaft member and the nut member being rotatable upon a vertical force being placed on the armrest assembly and the trigger being positioned to selectively engage the one member to prevent rotation after vertical adjustment. 8. A chair including a base, a seat, a back, and at least one armrest as defined in claim 4 that is supported on one of the base, the seat, and the back. 9. The armrest defined in claim 4 wherein one of the armrest support and the armrest cap includes a keyhole-shaped slot and at least one of the swing arms includes a protrusion slidably operably engaging the keyhole-shaped slot. 10. The armrest defined in claim 9, wherein the protrusion has flat sides to slide along the keyhole-shaped slot, and arcuate end surfaces to rotatably engage a circular section at the end of the keyhole. 11. An adjustable armrest for a seating unit having a seat and back, comprising: an armrest support; a pair of swing arms pivoted to the armrest support at first and second pivots; an armrest cap pivoted to the swing arms at third and fourth pivots, at least two of the first, second, third, and fourth pivots being slidable toward and away from another of the pivots to thus allow independent longitudinal, lateral, and rotational/angular adjustment including movement between a forward position where at least half the armrest cap is forward of a midline of the armrest support and a rearward position where at least half the armrest cap is rearward of a midline of the armrest support; a wave compression spring positioned above the lower cap member; and a stop on at least one of the armrest support and the armrest cap for engaging the swing arms to limit outward movement of the swing arms. 12. The adjustable armrest defined in claim 11, including a second stop on at least one of the armrest support and the armrest cap for engaging the swing arms to limit inward movement of the swing arms. 13. The adjustable armrest defined in claim 11, wherein the armrest support includes a mounting plate with integrally-formed first and second stops that engage the swing arms to limit both inward and outward movement of the swing arms. 14. The adjustable armrest as defined in claim 11 further including a viscous dampener operably coupled to the armrest cap. 15. An armrest for a seating unit comprising: an armrest support; an armrest cap adjustably supported on the armrest support for movement to at least three different positions of use; a viscous dampener engaging the armrest cap and that dampens and smoothes movement of the armrest cap during adjustment; and a pair of swing arms supporting a lower cap member on the armrest support, each swing arm being pivotally attached at a first location to the lower cap member, and each slidably-and-pivotally attached to the armrest support for adjustably supporting the armrest cap for independent longitudinal, lateral, and rotational adjustment; a wave compression spring positioned above the lower cap member.
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