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    • 2. 发明授权
    • Hand truck brake application system
    • 手动卡车制动应用系统
    • US5799959A
    • 1998-09-01
    • US706599
    • 1996-09-05
    • Joseph D. Krawczyk
    • Joseph D. Krawczyk
    • B62B5/04B60T1/00
    • B62B5/04B62B5/0438B62B5/0485
    • A manually propelled, two-wheel supported hand truck for use in transporting products has a frame normally supported by the wheels in generally vertical inclination and comprises connected side rail members, and a fixed frame handle surface near its upper end. The frame supports a forwardly extending, load supporting nose plate. An axle, coupled to and extending crosswisely rearwardly of the frame journals the wheels. Supports on the frame side rail members journal a laterally extending pivotal brake applying rod having spaced apart brake shoes in a first position out of brake applying engagement with the wheels but aligned therewith, the rod being pivotal to move the shoes to a second position into braking engagement with the wheels. Fixed to the brake applying rod is a lever arm connected to a generally vertically extending rigid member. A mobile brake operating handle is mounted on the frame for movement relative to the fixed frame handle surface, the brake operating handle being connected with the rigid member to move it upwardly and downwardly and pivot the brake applying rod. A safety control member is fixed on the rod and is operative to cooperate with the frame to halt brake applying movement of the brake applying rod upon further movement of the rod beyond brake applying rotation.
    • 用于运输产品的手动推进的两轮支撑的手推车具有通常由车轮以大致垂直倾斜的方式支撑的框架,并且包括连接的侧轨构件,以及靠近其上端的固定框架手柄表面。 框架支撑向前延伸的负载支撑鼻板。 耦合到框架并且横向延伸的框架的轴将轮子预定。 支撑在框架侧轨构件上,横向延伸的枢转制动施加杆具有间隔开的制动蹄,其处于第一位置,脱离制动器施加与车轮接合但与其对准的位置,所述杆枢转以将鞋移动到第二位置进入制动 与轮子接合。 固定在制动施加杆上的是连接到大致垂直延伸的刚性构件的杠杆臂。 移动制动操作手柄安装在框架上以相对于固定框架手柄表面移动,制动操作手柄与刚性构件连接以使其向上和向下移动并枢转制动施加杆。 安全控制构件固定在杆上,并且可操作地与框架配合,以在制动器施加转动的进一步移动时停止制动施加杆的运动。
    • 4. 发明授权
    • Hand truck for transporting stacked trays
    • 用于运输堆放式托盘的手推车
    • US6131927A
    • 2000-10-17
    • US936380
    • 1997-09-25
    • Joseph D. Krawczyk
    • Joseph D. Krawczyk
    • B62B1/12B62B1/14B62B1/00
    • B62B1/12B62B1/14B62B2202/12B62B2203/42
    • A hand truck for carrying stacks of nested trays and other products has a vertically disposed back frame with an upper handle surface, supported for travel by a pair of rearward spaced apart wheels. The back frame provides a pair of side rails joined by horizontal brace rails. The hand truck further has an elongate nose plate pivotally connected to the lower ends of the side rails and foldable from an operable horizontal position to a stowed position swung up to lie in a plane substantially parallel to and adjacent the back frame. The nose plate has a back plate which fits between the side rails when the nose plate is swung up to stowed position. A hanger member securing to the nose plate and pivotally secured on the interior side of each side rail has a back flange extending angularly outwardly and providing a rigid abutment stop engaging the rear side of the side rail on which it mounts when the nose plate is swung to operative position.
    • 用于携带堆叠的嵌套托盘和其他产品的手推车具有垂直布置的后框架,其具有上手柄表面,由一对向后间隔开的车轮支撑行进。 后框架提供了一对通过水平支撑轨道连接的侧轨。 手推车还具有可枢转地连接到侧轨的下端的细长鼻板,并且可从可操作的水平位置折叠到收起位置,从而摆放在基本上平行于并邻近后框架的平面中。 当鼻板摆动到收起位置时,鼻板具有配合在侧轨之间的后板。 固定到鼻板并枢转地固定在每个侧轨的内侧上的衣架构件具有向后成角度地向外延伸的后凸缘,并且当鼻梁摆动时,提供接合侧轨的后侧的刚性抵靠止挡 到操作位置。
    • 5. 发明授权
    • Extensor wing latch mechanism for a two-wheeled hand truck
    • 两轮手推车的伸缩翼闩锁机构
    • US5632592A
    • 1997-05-27
    • US609532
    • 1996-03-01
    • Joseph D. Krawczyk
    • Joseph D. Krawczyk
    • B62B1/14B62B5/02B62B1/04
    • B62B1/14B62B5/025
    • A latch assembly mounted on a two-wheeled hand truck having vertically extending wings mounted on the hand truck frame side rails to pivot about axes extending generally parallel to said side rails from an operative position in which they extend laterally as substantially extensions of said side rails to a folded inoperative inboard transport position in which they lie inboard of the laterally inboard sides of said rails. The latch assembly is mounted on the frame for movement in a lateral path from a first position in which the latch assembly blocks movement of the wings to a laterally displaced second position in which the wings are freed to travel.
    • 安装在两轮手推车上的闩锁组件,其具有安装在手推车框架侧轨上的垂直延伸的翼,用于围绕大体上平行于所述侧轨的轴线枢转,所述轴线大致平行于所述侧轨从其工作位置枢转,在所述操作位置, 到折叠的不工作的内侧运输位置,其中它们位于所述轨道的横向内侧的内侧。 闩锁组件安装在框架上,用于在第一位置的侧向路径中移动,在第二位置中,闩锁组件将翼片的运动阻挡在侧向移位的第二位置,在该位置中翼部被释放以行进。