专利名称：Hand brake apparatus for hand trucks发明人：Oscar B. Laird申请号：US07/095107申请日：19870911公开号：US04819767A公开日：19890411
摘要：A hand brake apparatus for installation on wheeled trucks of the type having aload supporting frame and at least two laterally opposed support wheels having a fixeddirection supporting the frame for movement over the ground and a handle portion formoving and directing the load supporting frame. One embodiment of the apparatuscomprises a singular tubular housing attached to the load supporting frame horizontallybetween and parallel to the rotational axis of two laterally opposed support wheelshaving a fixed direction. A pair of opposed extensible wheel engaging members carriedwithin the housing extend outwardly from each end thereof and are provided with aresilient brake disc to engage the sidewall of the stationarily mounted support wheelsand thereby prevent rotation of the wheels. A compression spring maintains theextensible wheel engaging members in a normally retracted position spaced inwardlyadjacent the wheel sidewall. Alternatively, two smaller housings may be installed adjacentthe stationarily mounted wheels and each carries a single extensible wheel engagingmember to engage the sidewall of the stationarily mounted support wheels. Theextensible members are actuated by a hand grip lever attached to the truck handle.
申请人：LAIRD; OSCAR B.
代理人：Kenneth A. Roddy
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