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Seat-brake including lockout

  • US 4,476,964 A
  • Filed: 03/11/1982
  • Issued: 10/16/1984
  • Est. Priority Date: 03/11/1982
  • Status: Expired due to Fees
First Claim
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1. A seat brake for use in a vehicle having a frame, a seat, at least a portion of said seat being movable with respect to said frame between a lower position when weight is placed on the seat and an upper position when weight is removed from the seat, and a brake selectively engageable to brake said vehicle, said seat brake comprising means for causing said brake to be engaged when said portion of said seat moves to said upper position and for causing said brake to be disengaged when said portion of said seat moves to said lower position, said means for causing said brake to be engaged including a vertically shiftable member having an upper end engageable with said portion of said seat and a lower end, and a fixed support member for supporting said vertically shiftable member for vertical movement, and means for connecting said lower end of said vertically shiftable member to said brake and for causing said brake to be engaged when said vertically shiftable member moves upwardly and for causing disengagement of said brake when said vertically shiftable member moves downwardly, and means for selectively locking said brake is disengagement including a stop member fixed to said vertically shiftable member below said fixed support member and movable with said vertically shiftable member toward and away from said fixed support member, a locking member including an upper end and a lower end, and means for supporting said locking member for pivotal movement between a first position wherein said locking member is positioned between said stop member and said fixed support member and wherein said lower end of said locking member engages said stop member and said upper end of said locking member engages said fixed support member to prevent upward movement of said stop member and said vertical member and a second position wherein said stop member and said vertically shiftable member are freely movable with respect to said locking member and said fixed support member.

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