# US 2014/0191551 A1 · No-tools chair and chair arm assembly > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0191551 A1 - Document ID: US20140191551A1 - Status: Published application - Kind: A1 - Application number: 13/736,461 - Filed: 2013-01-08 - Published: 2014-07-10 - Earliest claimed: 2013-01-08 - Assignees: Whalen Furniture Manufacturing, Inc. - Applicants: Whalen Furniture Manufacturing Inc. - Inventors: Thomas B. Hazzard; Tracy Leigh Hazzard - Web page: https://patentgrep.com/patent/US20140191551A1 ## CPC - A47C 7/54: Supports for the arms - A47C 4/02: Dismountable chairs - A47C 7/407: {of collapsible type} - A47C: CHAIRS; SOFAS; BEDS ## Abstract A no-tools chair and chair arm assembly is disclosed. The assembly includes an armrest support configured and arranged to connect to a seat of a chair. The armrest support has mating formations thereon. A backrest support is configured and arranged to connect to a backrest of a chair. The backrest support is pivotally connected to the armrest support. A chair arm has an armrest portion and support member depends from the armrest portion. A connector extends from the support member and has reciprocal mating formations thereon configured and arranged to interlock with the mating formations on the armrest support. The chair arm locks the backrest support in position when coupled to the armrest portion. ## Claims ### Claim 1 A no-tools chair arm assembly, comprising: an armrest support configured and arranged to connect to a seat of a chair, the armrest support having mating formations thereon; a backrest support configured and arranged to connect to a backrest of a chair, the backrest support pivotally connected to the armrest support; and a chair arm having an armrest portion and support member depending from the armrest portion, a connector extending from the support member having reciprocal mating formations thereon configured and arranged to interlock with the mating formations on the armrest support; whereby the chair arm locks the backrest support in position when coupled to the armrest portion. ### Claim 2 (depends on 1) The assembly of claim 1, wherein the backrest support further comprises a lock member having an aperture; and the armrest support further comprises a surface defining an aperture therethrough; wherein the aperture on the lock member aligns with the aperture on the support member when the backrest support is pivoted to an upright position. ### Claim 3 (depends on 2) The assembly of claim 2, wherein the connector further comprises a peg extending therefrom that interfits with the aperture on the backrest support and the aperture on the support member. ### Claim 4 (depends on 1) The assembly of claim 1, further comprising a spring button on the support member configured and arranged to interlock with the connector. ### Claim 5 (depends on 1) The assembly of claim 1, wherein the mating formations include a slot with a narrowed portion. ### Claim 6 (depends on 1) The assembly of claim 1, wherein the reciprocal mating formations include a projection with an enlarged portion. ### Claim 7 (depends on 1) The assembly of claim 1, further comprising a locking end cap having a decorative face on a front and reciprocal mating formations extending from a rear; the reciprocal mating formations configured and arranged to couple to the mating formations on the armrest support. ### Claim 8 (depends on 1) The assembly of claim 1, wherein the chair arm further comprises a front support configured and arranged to couple to the armrest support. ### Claim 9 (depends on 8) The assembly of claim 8, wherein armrest support further comprises a well and the front support has a locking lug with spring button extending therefrom, the locking lug configured and arranged to insert into the well, the well further having aperture therein configured and arrange to receive the spring button of the locking lug thereon. ### Claim 10 A chair, comprising: a seat; a backrest; a left armrest support connected to the seat cushion, the left armrest support having mating formations thereon; a right armrest support connected to the seat cushion, the right armrest support having mating formations thereon; a left backrest support connected to the backrest, the left backrest support pivotally connected to the left armrest support; a right backrest support connected to the backrest, the right backrest support pivotally connected to the right armrest support; a left chair arm having an armrest portion and support member depending from the armrest portion, a connector extending from the support member having reciprocal mating formations thereon configured and arranged to interlock with the mating formations on the left armrest support; and a right chair arm having an armrest portion and support member depending from the armrest portion, a connector extending from the support member having reciprocal mating formations thereon configured and arranged to interlock with the mating formations on the right armrest support; whereby the left chair arm and the right chair arm lock the left backrest support and right back rest support in position when coupled to the left armrest portion and right armrest portion, respectively. ### Claim 11 (depends on 10) The chair of claim 10, further comprising a base connected to the seat. ### Claim 12 (depends on 11) The chair of claim 11, further comprising casters attached depending from the base. ### Claim 13 (depends on 11) The chair of claim 11, wherein the base is connected to the seat via a gas lift, the gas lift configured and arranged to adjust the height of the seat cushion relative to the base. ### Claim 14 (depends on 10) The chair of claim 10, wherein the left backrest support and right back rest support each further comprises a lock member having an aperture; and the left armrest support and the right armrest support each further comprises a surface defining an aperture therethrough; wherein the aperture on the lock member aligns with the aperture on the respective support member when the respective backrest support is pivoted to an upright position. ### Claim 15 (depends on 14) The chair of claim 14, wherein each connector further comprises a peg extending therefrom that interfits with the aperture on the respective backrest support and the aperture on the respective support member. ### Claim 16 (depends on 1) The chair of claim 1, further comprising a spring button on the support member configured and arranged to interlock with the connector. ### Claim 17 (depends on 1) The chair of claim 1, wherein the mating formations on the respective armrest supports include a slot with a narrowed portion. ### Claim 18 (depends on 1) The chair of claim 1, wherein the reciprocal mating formations on the respective connectors of the chair arms include a projection with an enlarged portion. ### Claim 19 (depends on 1) The chair of claim 1, further comprising a left locking end cap and a right locking end cap, each respective end cap having a decorative face on a front and reciprocal mating formations extending from a rear; the reciprocal mating formations configured and arranged to couple to the mating formations on the respective armrest support. ### Claim 20 A no-tools chair arm assembly, comprising: an armrest support configured and arranged to connect to a seat of a chair, the armrest support having mating formations thereon; and a chair arm having an armrest portion and support member depending from the armrest portion, a connector extending from the support member having reciprocal mating formations thereon configured and arranged to interlock with the mating formations on the armrest support; whereby the chair arm interfaces with the chair arm of the armrest portion.