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A hydraulically powered self-propelled stripping machine having an electric motor for providing oscillating motion to a cutting head member. The electric motor driving a hydraulic pump for pumping hydraulic fluid to a hydraulic motor for driving the wheels of the hydraulically powered self propelled

A hydraulically powered self-propelled stripping machine having an electric motor for providing oscillating motion to a cutting head member. The electric motor driving a hydraulic pump for pumping hydraulic fluid to a hydraulic motor for driving the wheels of the hydraulically powered self propelled stripping machine. The hydraulic system having forward and reverse as well as speed control valves for controlling the direction and speed of the hydraulically powered wheels or for stopping. The hydraulically powered self-propelled stripping machine also having a hydraulic pressure safety valve for protecting the machine and the objects it engages from damage.

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A hydraulically powered self-propelled stripping machine having an electric motor for providing oscillating motion to a cutting head member. The electric motor driving a hydraulic pump for pumping hydraulic fluid to a hydraulic motor for driving the wheels of the hydraulically powered self propelled

A hydraulically powered self-propelled stripping machine having an electric motor for providing oscillating motion to a cutting head member. The electric motor driving a hydraulic pump for pumping hydraulic fluid to a hydraulic motor for driving the wheels of the hydraulically powered self propelled stripping machine. The hydraulic system having forward and reverse as well as speed control valves for controlling the direction and speed of the hydraulically powered wheels or for stopping. The hydraulically powered self-propelled stripping machine also having a hydraulic pressure safety valve for protecting the machine and the objects it engages from damage. each include longitudinally-extending upper and lower walls and also include end walls that interconnect and stabilize the upper and lower walls. 8. The bumper system defined in claim 1, wherein the energy absorber includes interconnecting sections that connect adjacent ones of the box-shaped sections and that abut the bumper beam. 9. The bumper system defined in claim 1, wherein the box-shaped sections each include upper and lower walls that are generally parallel, but that are not flat for improved controlled collapse upon impact. 10. The bumper system defined in claim 1, wherein the box-shaped sections include upper and lower box-shaped sections with a space provided between the top and bottom box sections for improved collapse. 11. The bumper system defined in claim 1, wherein some of the box-shaped sections include a top edge flange that frictionally engages the bumper beam and stabilizes the energy absorber on the bumper beam. 12. The bumper system defined in claim 11, wherein the top edge flange overlaps onto and frictionally engages a top surface of the bumper beam. 13. The bumper system defined in claim 1, wherein some of the box-shaped sections include a bottom edge flange that frictionally engage the bumper beam and stabilizes the energy absorber on the bumper beam. 14. The bumper system defined in claim 1, wherein the energy absorber includes walls all formed without blind surfaces, such that the energy absorber can be made without molding dies having secondary moving components for forming blind surfaces. 15. The bumper system defined in claim 1, wherein the nose sections frictionally engage the channel in the bumper beam. 16. The bumper system defined in claim 15, wherein the nose sections include detents for frictionally engaging the bumper beam. 17. The bumper system defined in claim 1, wherein the energy absorber includes top and bottom edge flanges for frictionally engaging top and bottom surfaces of the bumper beam. 18. The bumper system defined in claim 1, wherein the energy absorber includes interconnecting sections that interconnect adjacent ones of the box sections and that provide some longitudinal flexibility of the energy absorber so that the energy absorber can be flexed to match a longitudinally curved shaped of the bumper beam. 19. The bumper system defined in claim 1, wherein the bumper beam includes a beam end, and the energy absorber includes an end section with a front surface that extends at an acute angle to the beam end. 20. The bumper system defined in claim 1, wherein a center portion of the energy absorber is made from a first material, and the end section of the energy absorber is made of a second material different than the first material, the first material being selected to optimize the energy absorber for corner impact strength. 21. The bumper system defined in claim 1, wherein the nose sections terminate short of a bottom of the channel and do not extend to the bottom of the channel, which results in an initial energy absorption stroke before the nose sections bottom out in the channel. 22. A bumper system for vehicles comprising: a bumper beam having a continuous tubular cross section with a front surface that extends vertically when the bumper beam is in a car-mounted position, the bumper beam having mid-walls extending to the front surface that form a longitudinally-extending channel across a middle area of the front surface; and an energy absorber including a rear surface abutting the front surface of the bumper beam, the energy absorber having first, second, third, and fourth parallel walls that extend horizontally, the first parallel wall being at a top location and the fourth parallel wall being at a bottom location, the energy absorber further including top front and rear walls interconnecting the first and second parallel walls to form a top box section, and including a bottom front and rear walls interconnecting the third and fourth parallel walls to form a bottom box