CN1256533C - Pneumatic transfusing device - Google Patents
Pneumatic transfusing device Download PDFInfo
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- CN1256533C CN1256533C CN 03100778 CN03100778A CN1256533C CN 1256533 C CN1256533 C CN 1256533C CN 03100778 CN03100778 CN 03100778 CN 03100778 A CN03100778 A CN 03100778A CN 1256533 C CN1256533 C CN 1256533C
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Abstract
The present invention relates to a pneumatic filling device which comprises a cylinder and a reversing valve, wherein the cylinder comprises a cylinder casing and a piston controlled by the reversing valve to make reciprocating movement, and a piston rod is arranged at one side of the piston; the reversing valve comprises a reversing valve casing and a valve core, one end of the reversing valve casing is connected with the cylinder casing, and a through hole for extending the valve core in the cylinder casing is arranged in the wall between an inner chamber of the reversing valve casing and an inner chamber of the cylinder casing; the effective working area of the valve core at one end of a tail chamber of the reversing valve is larger than that of the other end of the tail chamber, the tail chamber of the reversing valve is communicated with a vent hole arranged in the side wall of the cylinder casing for controlling the reversing of the valve core, and the valve core can make reciprocating movement and reverse under the combined action of the piston and the air at both ends. Since only one air valve namely the reversing valve is matched with the cylinder for filling grease lubricant or liquid, the filling device has the advantages of simple structure, small volume and easy manufacture.
Description
Technical field
The present invention relates to a kind of pneumatic type charging point, particularly a kind of pneumatic type charging point that is used for grease up or pumps liquid.
Background technique
The name that I have applied for is called " automobile-used pneumatic lubricating grease force-filling device ", the patent No. is that the Chinese patent of 95243010.X discloses a kind of charging point, it comprises the cylinder in control valve, selector valve and the control valve, enter the spool to-and-fro motion switching gas circuit that makes selector valve by control valve by compressed-air actuated, thereby the reciprocating motion of the pistons in the control cylinder is annotated lubricating grease or liquid continuously.This charging point has two air valves, and complex structure, volume are bigger, and difficulty of processing is big.
Summary of the invention
The object of the present invention is to provide a kind of simple in structurely, volume is less, is convenient to the pneumatic type charging point of manufacturing.
For achieving the above object, pneumatic type charging point of the present invention, comprise cylinder and selector valve, described cylinder comprises the piston of cylinder shell reciprocating side band piston rod with being subjected to described selector valve control, in cylinder shell, be positioned at piston before, back both sides have preceding cylinder chamber and cylinder chamber, back, described selector valve comprises selector valve housing and spool, has the front chamber that constitutes by described selector valve housing and described spool in the described selector valve, rear chamber, venting cavity and selector valve tail chamber, wherein front chamber alternately communicates with relief opening or suction port, front chamber communicates by the rear portion of feeding work air flue with cylinder chamber, described back, described rear chamber alternately communicates with suction port or air outlet, rear chamber communicates with the front portion of described preceding cylinder chamber by the work air flue that resets, the front portion of described venting cavity communicates with atmosphere, described relief opening, the air outlet all communicates with atmosphere, on the wall between selector valve housing inner chamber and the cylinder shell inner chamber, have and to make described spool extend into the indoor through hole of described back cylinder, effective work area of the end of spool in described selector valve tail chamber is greater than effective work area of its other end, the commutation hole that described spool commutation is controlled by being used on pushing away the valve air flue and being arranged on described cylinder shell sidewall in the rear portion in selector valve tail chamber communicates, the commutation hole communicates with the cylinder shell inner chamber, and described spool is the to-and-fro motion switching gas circuit under the synergy of the gas at its two ends and described piston.
Pneumatic type charging point of the present invention, wherein said spool comprises valve rod and reversing piston, the front portion of described venting cavity communicates with atmosphere by the valve through hole.
Pneumatic type charging point of the present invention, the front portion of wherein said venting cavity communicates with the air outlet.
Pneumatic type charging point of the present invention, cavity between wherein said selector valve housing and the described valve rod is equipped with several spacer joints, between adjacent two spacers joint and the outer end that is positioned at the spacer joint at two ends seal ring all is housed, the inside and outside circle of described seal ring matches with described valve rod and selector valve housing respectively, on the described reversing piston seal ring is housed.
Pneumatic type charging point of the present invention, the cavity between wherein said selector valve housing and the described valve rod is equipped with lining, and the cavity between selector valve housing and the described reversing piston is equipped with tail chamber lining, and seal ring is equipped with at the external cylindrical surface place of described lining and tail chamber lining.
Pneumatic type charging point of the present invention, wherein said relief opening link to each other by pipeline with described air outlet and then communicate with atmosphere.
Pneumatic type charging point of the present invention, comprise cylinder and selector valve, described cylinder comprises the piston of cylinder shell reciprocating side band piston rod with being subjected to described selector valve control, in cylinder shell, be positioned at piston before, back both sides have preceding cylinder chamber and cylinder chamber, back, described selector valve comprises selector valve housing and spool, the indoor Returnning spring that can make described piston reset that is provided with of cylinder before described, the front portion of preceding cylinder chamber communicates with the cylinder through hole, has the ventilation chamber that constitutes by described selector valve housing and described spool in the described selector valve, venting cavity and selector valve tail chamber, the ventilation chamber alternately communicates with relief opening or suction port, the ventilation chamber communicates by the rear portion of feeding work air flue with cylinder chamber, described back, the front portion of described venting cavity communicates with the valve through hole, described cylinder through hole, relief opening and valve through hole all communicate with atmosphere, on the wall between selector valve housing inner chamber and the cylinder shell inner chamber, have and to make described spool extend into the indoor through hole of described back cylinder, effective work area of the end of spool in described selector valve tail chamber is greater than effective work area of its other end, the commutation hole that the spool commutation is controlled by being used on pushing away the valve air flue and being arranged on described cylinder shell sidewall in the rear portion in selector valve tail chamber communicates, the commutation hole communicates with the cylinder shell inner chamber, and described spool is the to-and-fro motion switching gas circuit under the synergy of the gas at its two ends and described piston.
Pneumatic type charging point of the present invention, wherein said spool comprises valve rod and reversing piston.
Pneumatic type charging point of the present invention is equipped with seal ring on the wherein said valve rod, on the described reversing piston seal ring is housed.
Pneumatic type charging point of the present invention is that selector valve cooperates the operation of carrying out grease up or pumping liquid with cylinder owing to have only an air valve, makes the structure of charging point become very simple, and volume also diminishes, and manufacturing easily.
Description of drawings
Fig. 1 is first an embodiment's of the present invention schematic representation;
Fig. 2 is second an embodiment's of the present invention schematic representation;
Fig. 3 is the 3rd an embodiment's of the present invention schematic representation;
Fig. 4 is the 4th an embodiment's of the present invention schematic representation.
Embodiment
Below in conjunction with drawings and Examples in detail the present invention is described in detail.
Figure 1 shows that first embodiment of pneumatic type charging point of the present invention, comprise cylinder and selector valve, described cylinder comprises the piston 14 of cylinder shell 7 reciprocating side band piston rod 15 with being subjected to described selector valve control, cylinder casing 7 comprises cylinder body 20, front end housing 17 and back cylinder cover 11, in cylinder shell 7, be positioned at piston 14 before, back both sides have preceding cylinder chamber 39 and cylinder chamber, back 36, described selector valve comprises selector valve housing 10 and spool 21, selector valve housing 10 comprises valve body 31 and valve gap 30, spool 21 comprises valve rod 13 and reversing piston 12, has the front chamber 37 that constitutes by selector valve housing 10 and spool 21 in the described selector valve, rear chamber 38, venting cavity 41 and selector valve tail chamber 9, wherein front chamber 37 alternately communicates with relief opening 3 or suction port 1, front chamber 37 communicates by the rear portion of feeding work air flue 4 with cylinder chamber, described back 36, described rear chamber 38 alternately communicates with suction port 1 or air outlet 2, rear chamber 38 communicates with the front portion of described preceding cylinder chamber 39 by the work air flue 5 that resets, the front portion of described venting cavity 41 communicates with air outlet 2 (because air outlet 2 communicates with atmosphere, in when spool 21 to-and-fro motion, outer air can free in and out), one end of described selector valve housing 10 links to each other with described cylinder shell 7, have on the wall between selector valve housing 10 inner chambers and cylinder shell 7 inner chambers and can make described spool 21 extend into through hole 8 in the cylinder chamber, described back 36, effective work area of the end of spool 21 in selector valve tail chamber 9 is greater than effective work area of its other end, the commutation hole 32 that described spool 21 commutations are controlled by being used on pushing away valve air flue 6 and being arranged on described cylinder shell 7 sidewalls in the rear portion in described selector valve tail chamber 9 (being the afterbody chamber of selector valve away from cylinder shell) communicates, commutation hole (32) communicates with cylinder shell (7) inner chamber, and described spool 21 is the to-and-fro motion switching gas circuit under the synergy of the gas at its two ends and described piston 14.Selector valve shown in the figure one is the clearance seal pattern.
It is that spool 21 also can be a part that above-mentioned reversing piston 12 and valve rod 13 can be made of one.In addition, selector valve can also be placed on other position, as places parallel position of cylinder right side shown in Figure 1 and piston rod 15 or the like.
When work, pressurized air enters the rear chamber 38 of selector valve from the suction port 1 on the selector valve housing 10, enter the preceding cylinder chamber 39 of cylinder through the work air flue 5 that resets, promote to move behind the piston 14, the gas that then has been compressed in the cylinder chamber 36 enters the front chamber 37 of selector valve through feeding work air flue 4, relief opening from the selector valve housing 10 3 rows are to atmosphere again, move to behind the piston 14 and touch spool 21, and promote to move to terminal point behind the spool 21 and finish switching gas circuit, at this moment, lubricating grease is drawn in oil-storing barrel 16 (drawn with double dot dash line) the pipeline (drawn with double dot dash line) that is equipped with piston rod 15, air outlet 2 and rear chamber 38 communicate, suction port 1 communicates with front chamber 37, pressurized air enters front chamber 37 and enters the back cylinder chamber 36 of cylinder by feeding work air flue 4, promote piston 14 reaches, lubricating grease in the intake line is pressed into the position that machinery needs, the gas that has been compressed in the preceding cylinder chamber 39 of cylinder enters the rear chamber 38 of selector valve from the work air flue 5 that resets, and air outlet 2 rows from the selector valve housing 10 are to atmosphere again.When piston 14 reach is crossed after being used on cylinder shell 7 sidewalls control the commutation hole 32 of described spool 21 commutations, pressurized air in the back cylinder chamber 36 is by commutation hole 32 and push away valve air flue 6 and enter selector valve tail chamber 9, because effective work area of the end that the effective work area of reversing piston 12 in selector valve tail chamber 9 can contact with piston greater than valve rod 13, so promoting spool 21, pressurized air travels forward, thereby suction port 1 is separated with front chamber 37, and connect with rear chamber 38, switching gas circuit once more, finished a circulation this moment, thereby, make piston rod constantly suck lubricating grease and inject the position that machinery needs from oil-storing barrel 16 by 14 to-and-fro motion of spool 21 to-and-fro motion switching gas circuit control pistons.
Figure 2 shows that (this is an embodiment who pumps liquid for second embodiment of pneumatic type charging point of the present invention, should vertically place during actual the use), in this embodiment, on the reversing piston 12 seal ring is housed, cavity between selector valve housing 10 and the valve rod 13 is equipped with several spacer joints 34, between adjacent two spacers joint 34, and seal ring all is equipped with in the outer end that is positioned at the spacer joint 34 at two ends, in the seal ring, cylindrical matches with valve rod 13 and selector valve housing 10 respectively, the front portion of venting cavity 41 communicates with atmosphere (because valve through hole 33 communicates with atmosphere by the valve through hole 33 on the selector valve housing 10, in when spool 21 to-and-fro motion, outer air can free in and out), its working procedure is identical with first embodiment.Selector valve shown in the figure two is the elastic packing pattern.
Figure 3 shows that the 3rd embodiment of pneumatic type charging point of the present invention, in this embodiment, cavity between selector valve housing 10 and the reversing piston 12 is equipped with tail chamber lining 22, cavity between selector valve housing and the valve rod 13 is equipped with lining 19, seal ring is equipped with at the external cylindrical surface place of tail chamber lining 22 and lining 19, the front portion of venting cavity 41 communicates with atmosphere (because valve through hole 33 communicates with atmosphere by the valve through hole 33 on the selector valve housing 10, in when spool 21 to-and-fro motion, outer air can free in and out), relief opening 3 with communicate with atmosphere again after air outlet 2 links to each other by pipeline.Selector valve shown in the figure three is the clearance seal pattern, and its working procedure is still identical with first embodiment.
Figure 4 shows that the 4th embodiment of pneumatic type charging point of the present invention, comprise cylinder and selector valve, described cylinder comprises cylinder shell 7 and is subjected to described selector valve control and the piston 14 of the continuous reciprocating side band piston rod 15 of work, cylinder casing 7 comprises cylinder body 20, front end housing 17 and back cylinder cover 11, in cylinder shell 7, be positioned at piston 14 before, back both sides have preceding cylinder chamber 39 and cylinder chamber, back 36, described selector valve comprises selector valve housing 10 and spool 21, selector valve housing 10 comprises valve body 31 and valve gap 30, be provided with the Returnning spring 24 that described piston 14 is resetted in the cylinder chamber 39 before described, before the front portion of cylinder chamber 39 communicate with atmosphere (owing to cylinder through hole 25 communicates in atmosphere by the cylinder through hole 25 on the cylinder shell 7, in when piston 14 to-and-fro motion, outer air can free in and out), has the ventilation chamber 40 that constitutes by selector valve housing 10 and described spool 21 in the described selector valve, venting cavity 41 and selector valve tail chamber 9, ventilation chamber 40 alternately communicates with relief opening 2 or suction port 1, ventilation chamber 40 communicates by the rear portion of feeding work air flue 4 with cylinder chamber, described back 36, the front portion of described venting cavity 41 communicates with atmosphere (because valve through hole 33 communicates with atmosphere by the valve through hole 33 on the selector valve housing, in when spool 21 to-and-fro motion, outer air can free in and out), one end of described selector valve housing 10 links to each other with described cylinder shell 7, have on the wall between selector valve housing 10 inner chambers and cylinder shell 7 inner chambers and can make described spool 21 extend into through hole 8 in the cylinder chamber, described back 36, effective work area of the end of spool 21 in described selector valve tail chamber 9 is greater than effective work area of its other end, the commutation hole 32 that spool 21 commutations are controlled by being used on pushing away valve air flue 6 and being arranged on described cylinder shell 7 sidewalls in the rear portion in selector valve tail chamber 9 communicates, commutation hole (32) communicates with cylinder shell (7) inner chamber, and described spool 21 is continuous to-and-fro motion switching gas circuit under the synergy of the gas at its two ends and described piston 14.
Above-mentioned spool 21 comprises valve rod 13 and reversing piston 12, on the valve rod 13 seal ring is housed, and on the reversing piston 12 seal ring is housed, and it is that spool 21 also can be a part that reversing piston 12 and valve rod 13 can be made of one.
The working procedure of the 4th embodiment's pneumatic type charging point of the present invention is: the Returnning spring 24 that has been compressed promotes to move behind the pistons 14, the gas that then has been compressed in the cylinder chamber 36 enters the ventilation chamber 40 of selector valve from feeding work air flue 4, and the relief opening 2 from selector valve housing 10 is arranged to atmosphere, move to after piston 14 continues and touch spool 21, and promote to move to terminal point behind the spool 21 and finish switching gas circuit, at this moment, lubricating grease is drawn into the pipeline that piston rod 15 abdicates (oil-storing barrel and pipeline etc. can referring to Fig. 1) in oil-storing barrel, relief opening 2 separates with ventilation chamber 40, and the suction port 1 on the selector valve housing 10 is communicated with ventilation chamber 40, pressurized air enters ventilation chamber 40 from suction port 1, and enter the back cylinder chamber 36 of cylinder by feeding work air flue 4, force piston 14 reaches, Returnning spring 24 compressions, when piston 14 reach cross be used to control the commutation hole 32 of described spool 21 commutations after, pressurized air is by commutation hole 32 and push away valve air flue 6 and enter selector valve tail chamber 9 (being the afterbody chamber of selector valve away from cylinder shell), because effective work area of the end of spool 21 in selector valve tail chamber 9 is greater than effective work area of its other end, so promoting spool 21, pressurized air travels forward, thereby ventilation chamber 40 is separated with suction port 1, relief opening 2 communicates with ventilation chamber 40, switching gas circuit once more, finished a circulation this moment, like this, thereby spool 21 continuous to-and-fro motion switching gas circuits make piston 14 to-and-fro motion continuously, constantly suck lubricating grease and inject the position that machinery needs from oil-storing barrel.Selector valve shown in the figure four is the elastic packing pattern.
Pneumatic type charging point of the present invention, the seal form of the selector valve described in the various embodiments described above can be exchanged.
First three embodiment of pneumatic type charging point of the present invention is not owing to there is the existence of spring, make the present invention have the very long life-span, and embodiment four makes selector valve become simpler owing to lacked an air flue, in addition, described selector valve can also be placed on other position, as be arranged among Fig. 4 and locate with the drawn selector valve 35 (partial schematic diagram) of double dot dash line, when the piston (drawn with double dot dash line) of the band conical surface can promote to stretch into spool in the cylinder shell when moving to left.
The present invention not only can be used for adding lubricating grease to machinery, also can pump liquid as oil, water, antifreeze liquid etc.
Be appreciated that the present invention has more than the concrete structure that is limited to the foregoing description, for a person skilled in the art, under the prerequisite that does not break away from the principle of the invention, can also make the changes and improvements of some structures, these also should be considered as protection scope of the present invention.
Claims (9)
1. pneumatic type charging point, comprise cylinder and selector valve, described cylinder comprises cylinder shell (7) and is subjected to the control of described selector valve and the piston (14) of a reciprocating side band piston rod (15), in cylinder shell (7), be positioned at piston (14) before, back both sides have preceding cylinder chamber (39) and cylinder chamber (36), back, described selector valve comprises selector valve housing (10) and spool (21), it is characterized in that: have the front chamber (37) that constitutes by described selector valve housing (10) and described spool (21) in the described selector valve, rear chamber (38), venting cavity (41) and selector valve tail chamber (9), wherein front chamber (37) alternately communicates with relief opening (3) or suction port (1), front chamber (37) communicates by the rear portion of feeding work air flue (4) with described cylinder chamber, back (36), described rear chamber (38) alternately communicates with suction port (1) or air outlet (2), rear chamber (38) communicates with the front portion of described preceding cylinder chamber (39) by the work air flue (5) that resets, the front portion of described venting cavity (41) communicates with atmosphere, described relief opening (3), air outlet (2) all communicates with atmosphere, have on the wall between selector valve housing (10) inner chamber and cylinder shell (7) inner chamber and can make described spool (21) extend into through hole (8) in the cylinder chamber, described back (36), effective work area of the end of spool (21) in selector valve tail chamber (9) is greater than effective work area of its other end, the commutation hole (32) that spool (21) commutation is controlled by being used on pushing away valve air flue (6) and being arranged on described cylinder shell (7) sidewall in the rear portion in selector valve tail chamber (9) communicates, commutation hole (32) communicates with cylinder shell (7) inner chamber, and described spool (21) is the to-and-fro motion switching gas circuit under the synergy of the gas at its two ends and described piston (14).
2. pneumatic type charging point as claimed in claim 1 is characterized in that: described spool (21) comprises valve rod (13) and reversing piston (12), and the front portion of described venting cavity (41) communicates with atmosphere by valve through hole (33).
3. pneumatic type charging point as claimed in claim 1 is characterized in that: the front portion of described venting cavity (41) communicates with air outlet (2).
4. pneumatic type charging point as claimed in claim 2, it is characterized in that: the cavity between described selector valve housing (10) and the described valve rod (13) is equipped with several spacer joints (34), between adjacent two spacers joints (34) and the outer end that is positioned at the spacer joint (34) at two ends seal ring all is housed, the inside and outside circle of described seal ring matches with described valve rod (13) and selector valve housing (10) respectively, and described reversing piston is equipped with seal ring on (12).
5. pneumatic type charging point as claimed in claim 2, it is characterized in that: the cavity between described selector valve housing (10) and the described valve rod (13) is equipped with lining (19), cavity between selector valve housing (10) and the described reversing piston (12) is equipped with tail chamber lining (22), and seal ring is equipped with at the external cylindrical surface place of described lining (19) and tail chamber lining (22).
6. pneumatic type charging point as claimed in claim 1 or 2 is characterized in that: described relief opening (3) links to each other by pipeline with described air outlet (2) and then communicates with atmosphere.
7. pneumatic type charging point, comprise cylinder and selector valve, described cylinder comprises cylinder shell (7) and is subjected to the control of described selector valve and the piston (14) of a reciprocating side band piston rod (15), in cylinder shell (7), be positioned at piston (14) before, back both sides have preceding cylinder chamber (39) and cylinder chamber (36), back, described selector valve comprises selector valve housing (10) and spool (21), it is characterized in that: be provided with the Returnning spring (24) that described piston (14) is resetted in the cylinder chamber (39) before described, the front portion of preceding cylinder chamber (39) communicates with cylinder through hole (25), has the ventilation chamber (40) that constitutes by described selector valve housing (10) and described spool (21) in the described selector valve, venting cavity (41) and selector valve tail chamber (9), ventilation chamber (40) alternately communicates with relief opening (2) or suction port (1), ventilation chamber (40) communicates by the rear portion of feeding work air flue (4) with described cylinder chamber, back (36), the front portion of described venting cavity (41) communicates with valve through hole (33), described cylinder through hole (25), relief opening (2) and valve through hole (33) all communicate with atmosphere, have on the wall between selector valve housing (10) inner chamber and cylinder shell (7) inner chamber and can make described spool (21) extend into through hole (8) in the cylinder chamber, described back (36), effective work area of the end of spool (21) in described selector valve tail chamber (9) is greater than effective work area of its other end, the commutation hole (32) that spool (21) commutation is controlled by being used on pushing away valve air flue (6) and being arranged on described cylinder shell (7) sidewall in the rear portion in selector valve tail chamber (9) communicates, commutation hole (32) communicates with cylinder shell (7) inner chamber, and described spool (21) is the to-and-fro motion switching gas circuit under the synergy of the gas at its two ends and described piston (14).
8. pneumatic type charging point as claimed in claim 7 is characterized in that: described spool (21) comprises valve rod (13) and reversing piston (12).
9. pneumatic type charging point as claimed in claim 7 is characterized in that: described valve rod is equipped with seal ring on (13), and described reversing piston is equipped with seal ring on (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03100778 CN1256533C (en) | 2002-06-13 | 2003-01-20 | Pneumatic transfusing device |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN02239956.9 | 2002-06-13 | ||
| CN02239956 | 2002-06-13 | ||
| CN 03100778 CN1256533C (en) | 2002-06-13 | 2003-01-20 | Pneumatic transfusing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1467402A CN1467402A (en) | 2004-01-14 |
| CN1256533C true CN1256533C (en) | 2006-05-17 |
Family
ID=34195514
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03100778 Expired - Fee Related CN1256533C (en) | 2002-06-13 | 2003-01-20 | Pneumatic transfusing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1256533C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102506195B (en) * | 2011-10-14 | 2013-06-19 | 天津陆海石油设备系统工程有限责任公司 | Well logging/VMS (volcanic-associated massive sulfide) gas switching valve |
| CN103659452B (en) * | 2013-12-05 | 2015-12-09 | 宁波海天精工股份有限公司 | A kind of intermittent type automatic circulation lubricating system |
| CN107339278A (en) * | 2017-08-23 | 2017-11-10 | 南通理工智能制造技术有限公司 | Stroke-controllable automatic reciprocating hydraulic cylinder |
| CN109707982B (en) * | 2017-10-25 | 2024-04-02 | 郑州奥特科技有限公司 | Grease pumping device |
| CN109027652B (en) * | 2018-09-17 | 2024-06-04 | 岳阳祥恒纺织有限公司 | Lubricating arrangement on weaving equipment |
| CN114017652A (en) * | 2021-11-01 | 2022-02-08 | 安徽马钢矿业资源集团南山矿业有限公司 | Controllable barrel-removing method of grease filling machine |
-
2003
- 2003-01-20 CN CN 03100778 patent/CN1256533C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1467402A (en) | 2004-01-14 |
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