Spring applied fluid pressure release brake

Claim 1

A FRICTION BRAKE DEVICE FOR ARRESTING RELATIVE MOTION BETWEEN RELATIVELY MOVABLE MEMBERS COMPRISING: (A) A SLEEVE-LIKE OUTER BODY MEMBER INCLUDING ATTACHMENT MEANS FOR MOUNTING ON ONE OF SAID RELATIVELY MOVABLE MEMBERS AND HAVING AT ITS FORWARD END A PORTION DEFINING A GUIDEWAY EXTENDING LONGITUDINALLY INTERNALLY OF SAID OUTER BODY MEMBER, (B) A SUBSTANTIALLY SOLID OR BLOCK LIKE INNER BODY MEMBER HAVING AN AXIALLY EXTENDING BORE AND DISPOSED IN SAID OUTER BODY MEMBER WITH ITS FORWARD END SPACED REARWARDLY OF SAID GUIDEWAY, (C) A PAD CARRIER DISPOSED IN SAID GUIDEWAY AND MOVABLE THEREALONG, (D) A BRAKE PAD DISPOSED ON SAID PAD CARRIER, (E) SPRING MEANS INTERPOSED BETWEEN SAID FORWARD END OF SAID INNER BODY MEMBER AND SAID PAD CARRIER FOR URGING THE LATTER FORWARDLY ALONG SAID GUIDEWAY INTO AN OPERATIVE POSITION IN WHICH SAID BRAKE PAD ENGAGES THE OTHER OF SAID RELATIVELY MOVABLE MEMBER, (F) A PRESSURE FLUID CHAMBER AT THE REARWARD END OF SAID INNER BODY MEMBER HAVING A MOVABLE END MEMBER, (G) CONNECTING MEANS EXTENDING THROUGH SAID BORE IN SAID INNER BODY MEMBER BETWEEN SAID MOVABLE END MEMBER AND SAID PAD CARRIER TO ENABLE THE LATTER TO BE MOVED REARWARDLY ALONG SAID GUIDEWAY INTO A RETRACTED POSITION IN WHICH A CLEARANCE EXISTS BETWEEN SAID BRAKE PAD AND SAID OTHER RELATIVELY MOVABLE MEMBER IN RESPONSE TO ESTABLISHMENT OF FLUID PRESSURE IN SAID PRESSURE FLUID CHAMBER AND RESULTANT LONGITUDINAL SLIDING OF SAID MOVABLE END MEMBER.