# US 5,704,301 A · Rotary combustor and spring assembly therefor > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,704,301 A - Document ID: US5704301A - Status: Granted - Kind: A - Application number: 08/554,683 - Filed: 1995-11-07 - Granted: 1998-01-06 - Earliest claimed: 1995-11-07 - Assignees: Westinghouse Electric Corp. - Inventors: George A. Blasiole - Web page: https://patentgrep.com/patent/US5704301A ## CPC - F23G 5/20: having rotating or oscillating drums - F23G 5/46: Recuperation of heat - F27B 7/22: Rotary drums; Supports therefor - Y02P 80/15: On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply - F23G: CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION - F27B: FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS - Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS ## Abstract Rotary combustor and spring assembly therefor. The combustor includes a tire surrounding a kiln and a spring assembly interposed between the tire and kiln for interconnecting the tire and kiln. The spring assembly includes a clevis member attached to the tire and a spring member having an end portion thereof pivotally connected to the clevis member and an intermediate portion thereof attached to the kiln. The other end portion of the spring member is pivotally connected to an adjacent clevis member. The spring member allows for relative motion of the tire and the kiln as the first and second end portions of the spring member pivot about their respective clevis members. ## Claims ### Claim 1 In a rotary combustor having a tire surrounding a kiln, a spring assembly comprising: (a) a clevis member attached to a tire; and (b) a spring member having a first portion thereof pivotally connected to said clevis member and a second portion thereof attached to the kiln, where said spring member tapers from a larger cross section at the second portion thereof to a smaller cross section at the first portion thereof for providing flexibility to said spring member, and whereby said spring member allows for relative motion of the tire and the kiln as the first portion of said spring member pivots about said clevis member. ### Claim 2 (depends on 1) The spring assembly of claim 1, further comprising a flange outwardly extending from the second portion of said spring member, said flange being adapted to be welded to the kiln. ### Claim 3 (depends on 2) The spring assembly of claim 2, wherein said flange is formed of a metal having predetermined properties obviating the need to heat treat said flange. ### Claim 4 (depends on 3) The spring assembly of claim 3, wherein said flange is formed of carbon steel. ### Claim 5 In a rotary combustor having a tire surrounding a rotatable kiln, a spring assembly for mitigating stress in the tire and the kiln, comprising: (a) a first clevis member attached to the tire; (b) a second clevis member attached to the tire; (c) a first pivot pin extending through said first clevis member; (d) a second pivot pin extending through said second clevis member; and (e) an elongate spring member interposed between the tire and the kiln, said spring member having an intermediate portion thereof attached to the kiln and having a first arm portion pivotally connected to said first pin and a second arm portion pivotally connected to said second pin, where each of the first and second arm portions tapers from a larger cross section at the intermediate portion to a smaller cross section thereof for providing flexibility to said spring member, and whereby said spring member flexes for mitigating stress in the tire and kiln as the first arm portion pivots about said first pin and as the second arm portion pivots about said second pin and as the intermediate portion is attached to the kiln. ### Claim 6 (depends on 5) The spring assembly of claim 5, further comprising a pair of oppositely disposed flanges outwardly extending from the intermediate portion of said spring member, each of said flanges being adapted to be welded to the kiln. ### Claim 7 (depends on 6) The spring assembly of claim 6, wherein each of said flanges is formed of a metal having predetermined properties obviating the need to heat treat the flanges. ### Claim 8 (depends on 7) The spring assembly of claim 7, wherein each of said flanges is formed of carbon steel. ### Claim 9 A rotary combustor for burning waste material, comprising: (a) a rotatable kiln for burning the waste material therein, said kiln having a circular perimeter; (b) a tire surrounding said kiln for rotating said kiln, said tire having an inner circumference; (c) a first clevis member attached to the inner circumference of said tire; (d) a second clevis member spaced-apart from said first clevis member and attached to the inner circumference of said tire; (e) a first pivot pin extending through said first clevis member; (f) a second pivot pin extending through said second clevis member; and (g) an elongate spring member interposed between said tire and said kiln, said spring member having an intermediate portion thereof attached to the perimeter of said kiln and having a first arm portion having a first bore therethrough for pivotally receiving said first pin and having a second arm portion having a second bore therethrough for pivotally receiving said second pin, where each of the first and second arm portions tapers from a larger cross section at the intermediate portion to a smaller cross section thereof for providing flexibility to said spring members, and whereby said spring member flexes for mitigating stress in said tire and said kiln as the first arm portion pivots about said first pin and as the second arm portion pivots about said second pin and as the intermediate portion is attached to the perimeter of said kiln. ### Claim 10 (depends on 9) The rotary combustor of claim 9, further comprising a pair of oppositely disposed flanges outwardly extending from the intermediate portion of said spring member, each of said flanges being adapted to be welded to said kiln. ### Claim 11 (depends on 10) The rotary combustor of claim 10, wherein each of said flanges is formed of a metal having predetermined properties obviating the need to heat treat said flanges. ### Claim 12 (depends on 11) The rotary combustor of claim 11, wherein each of said flanges is formed of carbon steel.