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Cam operated tire building drum

  • US 4,772,351 A
  • Filed: 10/05/1987
  • Issued: 09/20/1988
  • Est. Priority Date: 10/05/1987
  • Status: Expired due to Fees
First Claim
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1. A tire building drum comprising:

  • an inner sleeve connected to a machine drive shaft,a spider formed of radially-extended shafts fixed to said inner sleeve,a plurality of alternating large and small arcuate segments slidably-mounted on said spider shafts and adapted to form a complete tire building cylinder when radially extending and permitting tire removal when radially collapsed,at least one cam plate,means mounting said cam plate for limited rotary movement on said inner sleeve about said drive shaft,followers interconnecting said arcuate segments with said cam plates to effect radial extension and collapse of said segments upon rotation of said cam plate with respect to said inner sleeve,and spring-loaded poppets between said cam plates and said spider normally preventing rotation of said cam plates with respect to said inner sleeve.

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