GB741879A - Improvements in or relating to excavating, digging and lifting machines - Google Patents
Improvements in or relating to excavating, digging and lifting machinesInfo
- Publication number
- GB741879A GB741879A GB277953A GB277953A GB741879A GB 741879 A GB741879 A GB 741879A GB 277953 A GB277953 A GB 277953A GB 277953 A GB277953 A GB 277953A GB 741879 A GB741879 A GB 741879A
- Authority
- GB
- United Kingdom
- Prior art keywords
- jacks
- frame
- implement
- jack
- digging
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/76—Graders, bulldozers, or the like with scraper plates or ploughshare-like elements; Levelling scarifying devices
- E02F3/80—Component parts
- E02F3/815—Blades; Levelling or scarifying tools
- E02F3/8157—Shock absorbers; Supports, e.g. skids, rollers; Devices for compensating wear-and-tear, or the like
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Earth Drilling (AREA)
Abstract
741,879. Soil-shifting apparatus. LINAKER, E. E. Feb. 1, 1954 [Jan. 30, 1953; May 15, 1953], Nos. 2779/53 and 13706/53. Class 68(1) One or more jacks are mounted on or adjacent to a digging or lifting implement so as to act directly between the implement or implement - supporting mount and the ground so as to be able to exert an additional upthrust to that exerted by the normal raising means of the implement or the mount. In one embodiment the free ends of the piston rods of hydraulically operated jacks secured to the corners of the base of an excavator bucket act on a groundengaging plate positioned beneath the bucket. In a second embodiment a jack or jacks 25 is or are mounted in each end of an implement-supporting frame 24 pivotally supported about means 59 secured to a frame 18 pivotally mounted at 16 on a yoke 12, 14 or at the end of a pair of arms pivotally mounted on a vehicle. In operation the frame 24 is maintained parallel to the frame 18 by a spring 61 and an arrangement of a valve and passages in the means 59 and the surrounding bush 44 of the frame. This valve arrangement automatically cuts off the supply of liquid to the jack or jacks at the upwardly tilted end of the frame whilst permitting liquid to be supplied to the other jack or jacks. The jacks are mounted for universal pivotal movement in the fram 24 and are biased to an upright position by springs 37.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB277953A GB741879A (en) | 1953-01-30 | 1953-01-30 | Improvements in or relating to excavating, digging and lifting machines |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB277953A GB741879A (en) | 1953-01-30 | 1953-01-30 | Improvements in or relating to excavating, digging and lifting machines |
Publications (1)
Publication Number | Publication Date |
---|---|
GB741879A true GB741879A (en) | 1955-12-14 |
Family
ID=9745742
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB277953A Expired GB741879A (en) | 1953-01-30 | 1953-01-30 | Improvements in or relating to excavating, digging and lifting machines |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB741879A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4321761A (en) * | 1979-06-20 | 1982-03-30 | Hedblom Soeren | Device for uprooting tree stumps |
FR2831569A1 (en) * | 2001-10-31 | 2003-05-02 | Liebherr Hydraulikbagger | Bulldozer blade has hydraulically operated retractable side foot |
-
1953
- 1953-01-30 GB GB277953A patent/GB741879A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4321761A (en) * | 1979-06-20 | 1982-03-30 | Hedblom Soeren | Device for uprooting tree stumps |
FR2831569A1 (en) * | 2001-10-31 | 2003-05-02 | Liebherr Hydraulikbagger | Bulldozer blade has hydraulically operated retractable side foot |
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