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Title: Support leg for bridges
Claims: We claim: 1. Support leg apparatus for bridges and the like, especially for portable bridges; said apparatus comprising: housing means, a stanchion disposed at said housing means for longitudinal movement with respect thereto, stanchion length adjusting means for forcibly moving said stanchion longitudinally with respect to said housing means, said adjusting means including a movable member and means for moving said movable member with respect to said housing means, first locking means for selectively locking said stanchion in respective adjusted positions with respect to said housing means, and second locking means for selectively locking said stanchion to said movable member, wherein each of said first and second locking means are fluidly controlled and include locking members movable into and out of engagement with detent stop means of said stanchion. 2. Apparatus according to claim 1, wherein said means for moving said movable member includes hydraulic pressure means, and wherein each of said first and second locking means are hydraulically controlled. 3. Apparatus according to claim 1, wherein said housing means includes an inner sleeve and an outer sleeve, said stanchion being movably guided between said inner and outer sleeve, wherein said movable member is a hydraulically operated piston guided in said inner sleeve, and wherein said second locking means is carried by and movable with said piston. 4. Apparatus according to claim 2, wherein said housing means includes an inner sleeve and an outer sleeve, said stanchion being movably guided between said inner and outer sleeve, wherein said movable member is a hydraulically operated piston guided in said inner sleeve, and wherein said second locking means is carried by and movable with said piston. 5. Apparatus according to claim 4, wherein said second locking means is located at the free end of said piston remote from the pressure faces thereof, and wherein said second locking means includes hydraulically controllable spring rings which are radially movable into and out of locking engagement with stop grooves formed on said stanchion and constituting said detent stop means. 6. Apparatus according to claim 4, wherein said first locking means is fixed in longitudinal position at the end of said inner sleeve which is open for permitting longitudinal extension of said stanchion, and wherein said first locking means includes hydraulically controllable spring means which are radially movable into and out of locking engagement with said stop grooves formed on said stanchion. 7. Apparatus according to claim 5, wherein said first locking means is fixed in longitudinal position at the end of said inner sleeve which is open for permitting longitudinal extension of said stanchion, and wherein said first locking means includes hydraulically controllable spring means which are radially movable into and out of locking engagement with said stop grooves formed on said stanchion. 8. Apparatus according to claim 4, wherein the stanchion is formed as a tube provided at the inner walls thereof with a plurality of ring grooves arranged longitudinally spaced from one another, said ring grooves constituting said detent stop means. 9. Apparatus according to claim 5, wherein the stanchion is formed as a tube provided at the inner walls thereof with a plurality of ring grooves arranged longitudinally spaced from one another, said ring grooves constituting said stop grooves. 10. Apparatus according to claim 6, wherein the stanchion is formed as a tube provided at the inner walls thereof with a plurality of ring grooves arranged longitudinally spaced from one another, said ring grooves constituting said stop grooves. 11. Apparatus according to claim 7, wherein the stanchion is formed as a tube provided at the inner walls thereof with a plurality of ring grooves arranged longitudinally spaced from one another, said ring grooves constituting said stop grooves. 12. Apparatus according to claim 5, wherein each of said spring rings is formed as a split ring, and wherein piston-cylinder means are connected to each of said split rings at opposite sides of the slot formed between the respective ends thereof. 13. Apparatus according to claim 6, wherein each of said spring rings is formed as a split ring, and wherein piston-cylinder means are connected to each of said split rings at opposite sides of the slot formed between the respective ends thereof. 14. Apparatus according to claim 11, wherein each of said spring rings is formed as a split ring, and wherein piston-cylinder means are connected to each of said split rings at opposite sides of the slot formed between the respective ends thereof. 15. Apparatus according to claim 3, wherein an oil container as well as an after-connected hydro-reservoir, as well as hydraulic control elements for supply of fluid medium to the piston and other aggregates are arranged inside said inner sleeve. 16. Apparatus according to claim 5, wherein an oil container as well as an after-connected hydro-reservoir, as well as hydraulic control elements for supply of fluid medium to the piston and other aggregates are arranged inside said inner sleeve. 17. Apparatus according to claim 7, wherein an oil container as well as an after-connected hydro-reservoir, as well as hydraulic control elements for supply of fluid medium to the piston and other aggregates are arranged inside said inner sleeve. 18. Apparatus according to claim 14, wherein an oil container as well as an after-connected hydro-reservoir, as well as hydraulic control elements for supply of fluid medium to the piston and other aggregates are arranged inside said inner sleeve. Other info: Inventors: Soffge, Friedhelm (Kornwestheim, DT) Albrecht, Gerhard (Illingen, DT) Application Number: 576443 Filing Date: 1975-05-12 Publication_date: 1976-06-22 Assignee: Dr. -Ing. H.c.F. Porsche Aktiengesellschaft (DT) Primary Class(es): 14/75 254/93R, 254/110, 405/224 Other Classes: US Patent Ref:
Other Refs: Primary Examiner: Byers, Nile C. Assistant Examiner: Attorney: Craig & Antonelli |
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