Hydraulic apparatus with return to neutral mechanism

  • US 6,968,687 B1
  • Filed: 07/22/2004
  • Issued: 11/29/2005
  • Est. Priority Date: 02/20/2001
  • Status: Expired due to Term
First Claim
Patent Images

1. A hydraulic apparatus, comprising:

  • a housing;

    a trunnion arm extending from the housing;

    a return arm rotatably mounted on the trunnion arm and attached to the housing, the return arm comprising a stop;

    a control arm attached to the trunnion arm;

    a pair of scissor return arms rotatably mounted coaxially with the return arm and the control arm; and

    a spring attached to the scissor return arms to bias the scissor return arms against the stop.

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