# US 8,783,700 B2 · Stroller wheel device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,783,700 B2 - Document ID: US8783700B2 - Status: Granted - Kind: B2 - Application number: 13/590,087 - Filed: 2012-08-20 - Published: 2013-03-21 - Granted: 2014-07-22 - Earliest claimed: 2011-09-15 - Assignees: Wonderland Nurserygoods Company Limited - Applicants: Dao-Chang Li - Inventors: Dao-Chang Li - Web page: https://patentgrep.com/patent/US8783700B2 ## CPC - B60G 3/02: with a single pivoted arm - B60B 3/001: {Lightweight wheels, e.g. for strollers or toys} - B60B 33/045: {mounted resiliently, by means of dampers} - B62B 9/18: Resilient suspensions of bodies - B62B 2301/20: Resilient wheel suspension using springs - B60G: VEHICLE SUSPENSION ARRANGEMENTS (air-cushion vehicles B60V; {cycle suspensions B62K25/00}) - B60B: VEHICLE WHEELS (making wheels or wheel parts by rolling B21H1/00, by forging, hammering or pressing B21K1/28); CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION - B62B: HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES (characterised by animal propulsion B62C; propulsion of sledges by driver or engine B62M) ## Abstract A stroller wheel device includes a wheel, a frame-connecting member, a wheel-connecting arm, and a resilient member. The frame-connecting member includes at least one first pressing portion. The wheel-connecting arm includes upper and lower ends connected respectively and pivotally to the frame-connecting member and the wheel, and at least one second pressing portion spaced apart from the first pressing portion. The resilient member is disposed between and abuts against the first and second pressing portions. When the wheel-connecting arm rotates relative to the frame-connecting member, the first and second pressing portions move toward each other to compress the resilient member. ## Claims ### Claim 1 A stroller wheel device comprising: a wheel; a frame-connecting member including at least one first pressing portion; a wheel-connecting arm including upper and lower ends connected respectively and pivotally to said frame-connecting member and said wheel, and at least one second pressing portion spaced apart from said first pressing portion; and a resilient member disposed between and abutting against said first and second pressing portions such that, when said wheel-connecting arm rotates relative to said frame-connecting member, said first and second pressing portions move toward each other to compress said resilient member; wherein said frame-connecting member includes a sleeve connected pivotally to said wheel-connecting arm, a pressing ring disposed between said frame-connecting member and said wheel-connecting arm, said pressing ring including said first pressing portion at an end thereof facing said second pressing portion, said pressing ring being connected to said wheel-connecting arm in such a manner to be driven by said wheel-connecting arm to rotate to thereby move toward said second pressing portion. ### Claim 2 (depends on 1) The stroller wheel device as claimed in claim 1, wherein one of an end of said pressing ring opposite to said first pressing portion and an end of said frame-connecting member facing said pressing ring is formed with at least one spiral surface, and the other of said end of said pressing ring opposite to said first pressing portion and said end of said frame-connecting member facing said pressing ring is biased to contact said spiral surface. ### Claim 3 (depends on 1) The stroller wheel device as claimed in claim 1, wherein an end of said pressing ring opposite to said first pressing portion is formed with a first spiral surface, and said frame-connecting member further includes a second spiral surface facing and abutting against said first spiral surface. ### Claim 4 (depends on 1) The stroller wheel device as claimed in claim 1, wherein an end of said pressing ring opposite to said first pressing portion is formed with two diametrically opposed first spiral surfaces, and said frame-connecting member further includes two second spiral surfaces facing and abutting against said first spiral surfaces, respectively. ### Claim 5 (depends on 1) The stroller wheel device as claimed in claim 1, wherein said wheel-connecting arm further includes a first engaging portion, and said pressing ring further includes a second engaging portion that engages said first engaging portion, such that said pressing ring can be driven by said wheel-connecting arm to rotate. ### Claim 6 (depends on 5) The stroller wheel device as claimed in claim 5, wherein said wheel-connecting arm further includes a projecting rod disposed at a central portion of said second pressing portion, and a surrounding wall extending from an outer periphery of said second pressing portion and disposed around said projecting rod, said first engaging portion being configured as a rib extending from an inner wall surface of said surrounding wall and extending in a direction parallel to said projecting rod, said pressing ring being sleeved movably on said projecting rod, said second engaging portion being configured as an engaging groove formed in an outer periphery of said pressing ring, said rib extending through said engaging groove. ### Claim 7 (depends on 1) The stroller wheel device as claimed in claim 1, wherein said resilient member is a compression spring disposed between said pressing ring and said wheel-connecting arm and having two ends abutting respectively against said first and second pressing portions. ### Claim 8 (depends on 1) The stroller wheel device as in claim 1 wherein each of said frame-connecting member and said wheel-connecting arm are connected together with a shaft extending between each of them with said first and second pressing portions and said resilient member mounted coaxially on said shaft. ### Claim 9 A stroller wheel device comprising: a wheel; a frame-connecting member including at least one first pressing portion; a wheel-connecting arm including upper and lower ends connected respectively and pivotally to said frame-connecting member and said wheel, and at least one second pressing portion spaced apart from said first pressing portion; and a resilient member disposed between and abutting against said first and second pressing portions such that, when said wheel-connecting arm rotates relative to said frame-connecting member, said first and second pressing portions move toward each other to compress said resilient member; wherein one of said frame-connecting member and said wheel-connecting arm is formed with an annular groove, said second pressing portion and said resilient member being disposed within said annular groove, said frame-connecting member further including a third pressing portion, said first and third pressing portions being disposed in said annular groove and being spaced apart from each other, said third pressing portion abutting against said second pressing portion. ### Claim 10 (depends on 9) The stroller wheel device as claimed in claim 9, wherein said frame-connecting member is formed with a first annular groove, and said wheel-connecting arm is formed with a second annular groove aligned with said first annular groove, each of said first and third pressing portions being a projecting block extending from said first annular groove into said second annular groove, said second pressing portion being a projecting block that is disposed in said second annular groove and that extends from said second annular groove into said first annular groove, said resilient member being an elastomer disposed in said first and second annular grooves. ### Claim 11 (depends on 10) The stroller wheel device as claimed in claim 10, wherein said resilient member has two opposite abutting walls abutting respectively against said first and second pressing portions, two connecting walls connected between said side abutting walls, and at least one through hole formed through said resilient member and disposed between said side abutting walls and between said connecting walls. ### Claim 12 (depends on 11) The stroller wheel device as claimed in claim 11, wherein said resilient member further has a reinforcing wall connected between said connecting walls and spaced apart from said side abutting walls, said resilient member having two said through holes each disposed between said reinforcing wall and a corresponding one of said side abutting walls and between said connecting walls. ### Claim 13 (depends on 9) The stroller wheel device as claimed in claim 9, wherein said resilient member is one of a polyester elastomer, a rubber elastomer, and a silicone elastomer. ### Claim 14 (depends on 9) The stroller wheel device as in claim 9 wherein each of said frame-connecting member and said wheel-connecting arm are connected together with a shaft extending between each of them with said first and second pressing portions and said resilient member mounted around said shaft. ### Claim 15 A stroller wheel device comprising: a wheel; a frame-connecting member including at least one first pressing portion; a wheel-connecting arm including upper and lower ends connected respectively and pivotally to said frame-connecting member and said wheel, and at least one second pressing portion spaced apart from said first pressing portion; and a resilient member disposed between and abutting against said first and second pressing portions such that, when said wheel-connecting arm rotates relative to said frame-connecting member, said first and second pressing portions move toward each other to compress said resilient member; wherein one of said frame-connecting member and said wheel-connecting arm is formed with an annular groove, said frame-connecting member including two said first pressing portions disposed in said annular groove and spaced apart from each other, said wheel-connecting arm including two said second pressing portions disposed in said annular groove, one of said first pressing portions being disposed between and abutting against one of said second pressing portions and one of said resilient members, the other of said first pressing portions being disposed between and abutting against the other of said second pressing portions and the other of said resilient members. ### Claim 16 (depends on 15) The stroller wheel device as in claim 15 wherein each of said frame-connecting member and said wheel-connecting arm are connected together with a shaft extending between each of them with said first and second pressing portions and said resilient member mounted around said shaft. ### Claim 17 A stroller wheel device comprising: a wheel; a frame-connecting member including a pressing ring at an end thereof having at least one first pressing portion; a wheel-connecting arm including upper and lower ends connected respectively and pivotally to said frame-connecting member and said wheel, said upper end of said wheel-connecting arm including at least one second pressing portion spaced apart from, and facing said first pressing portion; and a resilient member disposed between and abutting against said first and second pressing portions such that, when said wheel-connecting arm rotates relative to said frame-connecting member, said first and second pressing portions move toward each other to compress said resilient member. ### Claim 18 (depends on 17) The wheel device as claimed in claim 17, wherein said resilient member is disposed between said pressing ring and said wheel-connecting arm. ### Claim 19 (depends on 17) The wheel device as claimed in claim 17, wherein said resilient member is an elastomer. ### Claim 20 (depends on 17) The stroller wheel device as in claim 17 wherein each of said frame-connecting member and said wheel-connecting arm are connected together with a shaft extending between each of them with said first and second pressing portions and said resilient member mounted around said shaft. ### Claim 21 A stroller wheel device comprising: a wheel; a frame-connecting member including at least one first pressing portion; a wheel-connecting arm including upper and lower ends connected respectively and pivotally to said frame-connecting member and said wheel, said upper end of said wheel-connecting arm including at least one second pressing portion spaced apart from said first pressing portion; and a resilient member disposed between and abutting against said first and second pressing portions such that, when said wheel-connecting arm rotates relative to said frame-connecting member, said first and second pressing portions move toward each other to compress said resilient member; wherein said upper end of said wheel-connecting arm is formed with an annular groove, said at least one second pressing portion and said resilient member being disposed within said annular groove. ### Claim 22 (depends on 21) The stroller wheel device as in claim 21 wherein each of said frame-connecting member and said wheel-connecting arm are connected together with a shaft extending between each of them with said first and second pressing portions and said resilient member mounted around said shaft. ### Claim 23 A wheel device comprising: a wheel; a frame-connecting member including two first pressing portions spaced apart from each other; a wheel-connecting arm including upper and lower ends connected respectively and pivotally to said frame-connecting member and said wheel, and two second pressing portions; and two resilient members disposed between said frame-connecting member and said wheel-connecting arm; wherein one of said first pressing portions is disposed between and abuts against one of said second pressing portions and one of said resilient members, the other of said first pressing portions being disposed between and abutting against the other of said second pressing portions and the other of said resilient members; said stroller wheel device further comprises a pivot extending between said frame-connecting member and said wheel-connecting arm for interconnecting said frame-connecting member and said wheel connecting arm, said second pressing portions and said resilient members being disposed around said pivot. ### Claim 24 (depends on 23) The wheel device as claimed in claim 23, wherein each of said resilient members is an elastomer.