Hand tools designed for bending tubes without crimping, deforming or kinking the tube walls are well known. The alternative is distribution and marketing of pre-shaped tubing components by parts manufacturers/distributors for a myriad of different vehicles, with consequent questions of availability. Tube bending is a craft that must be mastered by profession vehicle mechanics. Such tubing all to frequently fails because of positional wearing against adjacent mechanical components and/or corrosion, and must be replaced. The invention relates to tube bending tools and in particular to a tube-bending plier providing mechanical advantage enabling a mechanic to first bend, shaping a hard metal tube and thereafter to grasp and manipulate the shaped hard metal tube into alignment for connection with a designated port.Įvery motor vehicle includes shaped hydraulic liquid tubes composed of steel, stainless steel, copper and other malleable metals and alloys connecting between hydraulic power sources and actuators. 61/032347 is incorporated by reference in its entirety into this application. 2008 entitled, “T UBE B ENDING P LIERS.” Provisional Patent Application No.
This application relates to and claims any and all benefits of United States Provisional Patent Application No. The tube-bending plier of claim 3 wherein the curving, arcuately grooved, side-jaw mandrel surfaces sized for the selected tube diameter curve tangentially from each end of each semi-cylindrical engagement segment providing a front-end, upper and lower mandrel bending surfaces and a rear-end upper and lower mandrel bending surfaces. The tube-bending plier of claim 1 wherein the curving, arcuately grooved, side-jaw mandrel surfaces sized for the selected tube diameter curve tangentially from each end of each semi-cylindrical engagement segment providing a front-end, upper and lower mandrel bending surfaces and a rear-end upper and lower mandrel bending surfaces.ĥ. The tube-bending plier of claim 1 wherein the opposing, arcuately grooved, registering jaws and arcuately grooved side-jaw mandrel surfaces of the plier are oriented for providing a bending plane at an acute angle relative to a plane defined by the pivoting plier handles opening and closing the plier jaws for increasing torque (τ) for bending the tube held within the jaws of the plier.Ĥ.
The tube-bending plier of claim 1 wherein plier handles extending from a pivoting couple of the plier for closing and opening the plier jaws are configured for significantly increasing distance between the handles for applying torque (τ) relative to a twisting axis aligned in a plane defined by, and extending between the pivoting plier handles.ģ. In a tube-bending plier having oppositely arcuately grooved registering jaws with oppositely curving, arcuately grooved, side-jaw mandrel bending surfaces sized to accept tubing of a selected outside diameter, an improvement comprising semi-cylindrical engagement segments in the arcuately grooved registering jaws for providing a cylindrical engagement segment for grasping and holding the tube with a length comparable to the selected outside tube diameter, and wherein each curving, arcuately grooved, side-jaw mandrel bending surface sized for the selected tube diameter curves tangentially from an end of each semi-cylindrical engagement segment.Ģ. Ultrasonic crimping apparatus, crimping member, ultrasonic crimping method and arm production methodĭevice for judging collision of a die cushion mechanism and system for judging collisionġ. Method of manufacturing structural components from tube blanks of variable wall thickness Prestressed Rolling Mill Housing Assembley With Improved Operational Features Integrated, automated, variable sheet metal forming and assembly system Metal bending with an anti-galling bend fixtureĪluminum pipe having excellent surface quality, method and apparatus for manufacturing the aluminum pipe, and photosensitive drum base body