GB674191A - Improvements in jacks for agricultural trailers - Google Patents
Improvements in jacks for agricultural trailersInfo
- Publication number
- GB674191A GB674191A GB2983349A GB2983349A GB674191A GB 674191 A GB674191 A GB 674191A GB 2983349 A GB2983349 A GB 2983349A GB 2983349 A GB2983349 A GB 2983349A GB 674191 A GB674191 A GB 674191A
- Authority
- GB
- United Kingdom
- Prior art keywords
- arm
- jack
- pivoted
- draw bar
- plates
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
- B60S9/00—Ground-engaging vehicle fittings for supporting, lifting, or manoeuvring the vehicle, wholly or in part, e.g. built-in jacks
- B60S9/02—Ground-engaging vehicle fittings for supporting, lifting, or manoeuvring the vehicle, wholly or in part, e.g. built-in jacks for only lifting or supporting
- B60S9/04—Ground-engaging vehicle fittings for supporting, lifting, or manoeuvring the vehicle, wholly or in part, e.g. built-in jacks for only lifting or supporting mechanically
- B60S9/06—Ground-engaging vehicle fittings for supporting, lifting, or manoeuvring the vehicle, wholly or in part, e.g. built-in jacks for only lifting or supporting mechanically of screw-and-nut type
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
674,191. Jacks. MASSEY-HARRIS. Ltd. Nov. 20, 1950. [Nov. 22, 1949] No. 29833/49. Class 78 (iii). [Also in Group XXXI] In a jack for an agricultural trailer, in which a jack arm formed of spaced plates is pivoted on a draw bar formed of spaced side plates, the jack arm being raised or lowered by a screw threaded rod engaging a nut pivoted on the draw bar and being rotably carried at its lower end to be capable of sliding along the jack arm as the latter is raised or lowered ; the nut is carried on a bracket pivoted between the side plates of the draw bar and the lower end of the rod is carried in a bearing pivoted on brackets slidable between the plates of the jack arm. As shown the jack arm 1 is pivoted at 1<SP>1</SP> to the draw bar 2 of the trailer and carries a skid 4. Intermediate the ends of the arm 1 are slidably mounted the brackets 5 pivotally carrying the bearing 5<SP>1</SP> in which the screw threaded rod 3 is rotably carried. The rod carries the nut 6 mounted in a bracket 6<SP>1</SP> pivoted on the plates of the draw bar pins 6<SP>2</SP>, the jack being operated by a cranked end of the rod 3. In its raised position the arm 1 is held in position by a spring urged catch 7, a tail arm 7<SP>1</SP> on the catch having its movement under the action of the spring 8 limited by a lower coupling member 2<SP>1</SP> of the draw bar when the jack arm is lowered.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2983349A GB674191A (en) | 1949-11-22 | 1949-11-22 | Improvements in jacks for agricultural trailers |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2983349A GB674191A (en) | 1949-11-22 | 1949-11-22 | Improvements in jacks for agricultural trailers |
Publications (1)
Publication Number | Publication Date |
---|---|
GB674191A true GB674191A (en) | 1952-06-18 |
Family
ID=10297938
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2983349A Expired GB674191A (en) | 1949-11-22 | 1949-11-22 | Improvements in jacks for agricultural trailers |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB674191A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007004333A1 (en) * | 2007-01-29 | 2008-07-31 | Carl Zeiss Microimaging Gmbh | Optical arrangement for phase contrast observation |
-
1949
- 1949-11-22 GB GB2983349A patent/GB674191A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007004333A1 (en) * | 2007-01-29 | 2008-07-31 | Carl Zeiss Microimaging Gmbh | Optical arrangement for phase contrast observation |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB804726A (en) | Improved tractor propelled implement with beaming means | |
US2474483A (en) | Trailer drawbar support | |
GB674191A (en) | Improvements in jacks for agricultural trailers | |
US2672318A (en) | Jack for agricultural machines | |
GB613310A (en) | Improvements in or relating to the mounting of tools on agricultural implements | |
GB712044A (en) | Improvements relating to windscreen wipers | |
GB616641A (en) | An improvement in or relating to jacks for vehicles | |
GB670188A (en) | Improvements in or relating to apparatus for use in mounting pneumatic tyres on, or removing them from, wheels | |
GB645078A (en) | Improvements in supports or jacks on two-wheeled agricultural trailer machines | |
GB647571A (en) | A lever mechanism for controlling the movement of tools, seeders or other equipment into and out of their operative positions | |
GB640609A (en) | Improvements in or relating to trailer vehicles | |
GB1015471A (en) | Pick-up mechanism for agricultural machines | |
GB476402A (en) | Improvements in or relating to tip-wagons | |
GB837511A (en) | Retractable jack support | |
GB574747A (en) | A draw bar attachment for tractors | |
GB1101473A (en) | Earth working vehicles | |
ES33697U (en) | Articulated hook with spring device for cultivators (Machine-translation by Google Translate, not legally binding) | |
GB652124A (en) | Improvements in or relating to trailers | |
GB719246A (en) | A device for controlling undesired lateral movement of tractor-drawn agricultural implements | |
GB1109822A (en) | Improvements in or relating to self-loading agricultural vehicles | |
GB973193A (en) | Improvements relating to snow ploughs | |
GB540702A (en) | Improvements relating to draw-bar mechanism for tractor operated machinery | |
GB793306A (en) | Improvements in or relating to spare wheel carriers | |
GB664417A (en) | An improvements in or relating to means for coupling trailers to tractors | |
GB625608A (en) | Improvements in and relating to trailer vehicles |