CN101898735B - Vehicle self-saving expander - Google Patents
Vehicle self-saving expander Download PDFInfo
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- CN101898735B CN101898735B CN 201010240134 CN201010240134A CN101898735B CN 101898735 B CN101898735 B CN 101898735B CN 201010240134 CN201010240134 CN 201010240134 CN 201010240134 A CN201010240134 A CN 201010240134A CN 101898735 B CN101898735 B CN 101898735B
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- supporting mechanism
- piston rod
- cylinder body
- steady ring
- air bag
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Abstract
The invention relates to a vehicle self-saving expander comprising a supporting mechanism and a power mechanism, wherein the supporting mechanism is used for expanding a deformed vehicle body; the power mechanism is used for supplying expanded power for the supporting mechanism; the power mechanism comprises a portable air pump and a storage battery, wherein the storage battery is used for supplying electricity to the air pump; the lower end of the supporting mechanism is arranged in a cylinder body in a sliding mode, an air bag is arranged between the bottom surface of the supporting mechanism and the bottom surface of the cylinder body, the air pump arranged in the power mechanism inflates the air bag through an air transporting pipe; and the supporting mechanism comprises supporting blocks, wherein the supporting blocks are used for supporting the deformed vehicle body and are telescopically arranged at the upper end of the supporting mechanism; and an expander stroke comprises a spiral driving stroke and an air-bag pulling stroke. The vehicle self-saving expander has the advantages of larger stroke, stable power-source support, small volume, light weight, simple manufacturing process, convenient assembly and disassembly and lower cost.
Description
Technical field
The present invention relates to the get into an accident deliverance apparatus of rear use of automobile, especially a kind of expander of saving oneself for the occupant, this expander is mainly used in supporting the space of expanding escape for the occupant before the rescue group arrives.
Background technology
Automobile is one of topmost vehicle; often can cause traffic accident because joy riding, the road of chaufeur is wet and slippery and the pedestrian does not observe traffic rules and regulations etc. in the process of moving; and seat or vehicle frame that great traffic accident makes the occupant be deformed are possibly pushed down; if the occupant can not escape at short notice in this case; the opportunity that not only can incur loss through delay treatment; even it is injured also can secondary to occur, and therefore, needs a kind of self-help apparatus of automobile when having an accident of tackling.
At present, existing self-help apparatus ubiquity certain defect for car accedent, such as a kind of air sac jack commonly used, it comprises air bag and propulsion source, is high pressure gas and by the gas feeder air feed of special use in the propulsion source, during use air bag is arranged on vehicle frame or seat one side of distortion, make air bag expansion by propulsion source input high pressure gas, thereby vehicle frame or the seat of automobile deformed position are backed down, make no longer pressurized of the foot of human body and health, and from car body, spin off.But, because its gap was very little after people's shank or health were pressed, after the car body of distortion must being backed down enough large space the people is saved, and the stroke of this air sac jack is very little, the height of air cushion can't support enough large escape space after its inflation, and its subsidiary gas feeder is too heavy, after the occupant is stuck, can't normally use these equipment, so it can not satisfy the requirement of saving oneself at all.Another kind of automobile self-rescue air bag and for example, it is to be provided with air bag under car chassis, and the admission port of air bag links to each other with the outlet of the tail gas of automobile, and its principle is that to utilize the tail gas of automobile discharge that air bag is filled full, and then air bag supports automobile.But after great traffic accident occured, automobile is normal start the engine probably, and air bag just can't obtain the support of failure-free propulsion source like this, also can't realize expanding the purpose of vehicle frame, so can not reach the requirement of rescue.Also have in addition some to be used for the equipment of rescue, such as large-scale hoisting air chamber, this air bag is to utilize the bearing surface of overlarge area to realize hoisting function, but its volume is too large, weight is very heavy again, can only be used for the large-scale steamer of lifting, building etc., and be not suitable for the automobile use; Also has a kind of wrecking equipment, for solving the problem of propulsion source, it is provided with high-pressure gas bottle at automobile, be airbag aeration by high-pressure gas bottle, but safety and air-tightness after the long-time placement of this high-pressure gas bottle all can not be protected, and therefore cause accident that the effect that rear equipment is difficult to reach expectation occurs, and air bag can't be fixed on the specific position in use, less stable is so this equipment can not satisfy the requirement of saving oneself after car accedent occurs.
Summary of the invention
For above-mentioned deficiency of the prior art, the supporting mechanism stroke that main purpose of the present invention is to solve the self-help apparatus that is used at present automobile is too little so that can not expand the problem of enough large escape space, traditional expander volume and weight have further also been solved all too very much not easy to use, and lack the problem that propulsion source is supported, and provide the vehicle self-saving expander that a kind of stroke is large, volume and weight is all less and have enough propulsions source to support.
Technical scheme of the present invention: vehicle self-saving expander, it is characterized in that, comprise for the supporting mechanism of dilatating and deformable car body with for the actuating unit that expansion power is provided to described supporting mechanism, described actuating unit is by air pump and is used for consisting of to the storage battery of air pump power supply; The lower end of described supporting mechanism slidably is arranged in the cylinder body, is provided with air bag between the bottom surface of the bottom surface of supporting mechanism and cylinder body, the air pump in the actuating unit by gas piping to airbag aeration; Described supporting mechanism comprises the back-up block for the supporting deformation car body, the telescopic upper end that is arranged at supporting mechanism of described back-up block.
Described supporting mechanism also comprises piston, and described piston slidably is arranged in the cylinder body; Be fixed with a bearing cap shim that raises up in the upper end of piston, between bearing cap shim and piston, form cavity, in described cavity, be provided with steady ring and a lower steady ring on one, between upper steady ring and lower steady ring, be fixed with a thrust baring, described upper steady ring and bearing cap shim push against, and described lower steady ring and piston push against; Piston rod stretches in the cavity after passing upper steady ring from the top of bearing cap shim, the lower end of piston rod and the upper surface of thrust baring push against, also be fixed with a rotating shaft in the bottom of piston rod, at the rotating shaft cover locating piece is arranged, also be fixed with a block in the lower end of rotating shaft, described locating piece is stuck between the lower surface and block of thrust baring; The upper end of described piston rod is fixed with a synchronous pulley, and being fixed with one at cylinder body is provided the motor of power and in the rotating shaft of motor runner is installed by storage battery, and described runner drives synchronous pulley and then drive piston rod rotation by belt; Described piston rod is the cylindrical structure of upper end open, and screw rod inserts in the piston rod and with piston rod thread and is connected, and the upper end of screw rod links to each other with back-up block.
Principle of work of the present invention:
During use, first supporting mechanism is taken out the position be placed on car body or seat distortion, because the size of supporting mechanism of the present invention less than 11 cm, therefore can be put it in the car body slit after the distortion easily.Then press motor switch, by toothed belt transmission and worm drive the back-up block of supporting mechanism upper end and the cylinder base of supporting mechanism lower end are pushed against with the car body deformation place respectively, open again air pump switch after unclamping motor switch, at this moment air pump by gas piping to airbag aeration, air bag will expand gradually, thereby the lifting supporting mechanism makes its upward movement strut the distortion car body; Motor rotates by the driven by rotating wheel synchronous pulley, because synchronous pulley captives joint with piston rod, so also synchronous rotary of piston rod, screw rod is moved, thus can the generation upper and lower between piston rod and the screw rod to application force; Piston rod nut is subject to downward power, but because the lower end of piston rod propped up by thrust baring, so piston rod can not move down and can only rotate in situ, and screw rod is subject to application force upwards, therefore screw rod will protrude upward, and the back-up block on driving moves.Like this, back-up block backs down the car body expansion of deformation place under the combined action power that screw rod self moves up and air bag expansion drive supporting mechanism integral body moves up.This expander that combines above two kinds of expansion patterns in use, can apply to the car body of deformation place larger application force, the stroke of back-up block also significantly increases simultaneously, basically can reach the double distance of original stroke, can when saving oneself, provide larger escape space for indicator of trapped personnel.
When regaining back-up block, only need close air pump switch and make motor reversal, at this moment air bag is automatic deflation, thereby supporting mechanism is descended; The simultaneously driven by rotating wheel synchronous pulley contrarotation of motor, piston rod is contrarotation also, and screw rod is subject to downward power with in the retraction piston rod, expander is returned to uses front state.Motor of the present invention can adopt storage battery to drive, and also can drive by vehicular power-bottle, and the switch of motor can be arranged on the back-up block, convenient so in case of emergency starting switch.
Further, the double-decker that the overcoat that the liner that described air bag is made by elastomeric material and nylon cloth are made forms also is provided with french talc between the liner of air bag and overcoat.Can prevent that by double-deck mechanism air bag from the time being broken through in work, and talcous effect is to prevent that liner and the overcoat of air bag sticks together when folding.
Further, be provided with spherical hinge in the lower end of back-up block, described back-up block is flexibly connected by spherical hinge and screw rod.After spherical hinge was set, back-up block can turn to flexibly, the stressed position of the more convenient like this upper surface with back-up block and car body over against so that the location of supporting mechanism is more accurate when expanding, expand the demand that the personnel escape can be satisfied in the locus that.
Further, be provided with ball-bearing casing on the top of cylinder body, described synchronous pulley also is fixed with a band wheel cover by ball-bearing casing and cylinder body normal-running fit on the top of cylinder body, and described synchronous pulley is arranged in the band wheel cover.Can protect synchronous pulley by the band wheel cover; prevent that synchronous pulley from being blocked by the object of outside or wear and tear when rotating; in addition; ball-bearing casing not only can be played a supporting role to synchronous pulley; can also prevent synchronous pulley when rotating to the both sides run-off the straight, so that synchronous pulley remains the spigot shaft coaxle with piston rod.
With respect to prior art, the present invention has the following advantages:
1, the stroke of supporting mechanism is larger: the structure that balloon dilator of the present invention has adopted the supporting mechanism of air bag and telescoping to combine, can lift the supporting mechanism upward movement when air bag is filled with air, thereby vehicle frame or the seat that is out of shape backed down in the expansion that realizes supporting mechanism; Simultaneously, the screw rod of supporting mechanism inside also can rotate under the drive of motor and stretch out, so just further prolonged the stroke of whole expander, so that expander can support enough large escape space in narrow space, the help desk personnel flees from impaired car body.
2, have stable propulsion source support: the present invention adopts storage battery to drive the propulsion source that air pump is used as expander, and be placed on this propulsion source in the middle of the front-row seats of automobile or below the back seat, adopt like this mode in self-powered source in the car can effectively solve the problem that lacks propulsion source; And because storage battery and air pump are ripe equipment, can not lose efficacy for a long time because placing, they also have Multiple Type simultaneously, therefore can select all less storage battery of volume and weight and air pump to be combined into propulsion source, thereby can control preferably the volume and weight of propulsion source, to satisfy the demand that narrow space is placed and used in car.
3, volume is little, lightweight: expander of the present invention is considered the situation that the descendant's that is squeezed shank or health and vehicle frame gap are very little, therefore size and the weight of supporting mechanism have all been carried out strict restriction, simultaneously require again supporting mechanism that enough large bearing capacity can be provided, use like this outputting power of propulsion source and stroke and the own wt of supporting mechanism to accomplish intact coupling, accomplish to make things convenient for people's use of in stranded situation, saving oneself.
4, simple, the easy installation and removal of manufacturing process, supporting mechanism cylinder body of the present invention and parts all adopt 45 steel seamless steel tubes of national standard, it has advantages of the welding mechanics better performances, and cylinder body and cylinder bottom and each separating component adopt the mode of welding to be connected, thereby simplified manufacture craft; Cylinder cap and cylinder body are with bolts, so that demolition, installation are all convenient, have also reduced the manufacturing cost of equipment like this.
Description of drawings
Fig. 1 is the structure cutaway view of expander of the present invention.
Among the figure, 1-air pump, 2-storage battery, 3-cylinder body, 4-air bag, 5-back-up block, 6-piston, 7-bearing cap shim, 8-cavity, 9-piston rod, 91-upper steady ring, 92-lower steady ring, 10-thrust baring, 11-rotating shaft, 12-locating piece, 13-block, 14-synchronous pulley, 15-motor, 16-runner, 17-screw rod, 18-spherical hinge, 19-ball-bearing casing, 20-packing ring, 21-band wheel cover, 22-air valve, 23-gas piping.
The specific embodiment
The invention will be further described below in conjunction with the drawings and specific embodiments.
As shown in Figure 1, a kind of vehicle self-saving expander, comprise for the supporting mechanism of dilatating and deformable car body with for the actuating unit that expansion power is provided to described supporting mechanism, described actuating unit is by air pump 1 and is used for consisting of to the storage battery 2 of air pump 1 power supply, during installation actuating unit is placed in the middle of the front-row seats of automobile or below the back seat; The lower end of described supporting mechanism slidably is arranged in the cylinder body 3, between the bottom surface of the bottom surface of supporting mechanism and cylinder body 3, be provided with air bag 4, air pump 1 in the actuating unit gives air bag 4 inflations by gas piping 23, also is provided with air valve 22 on the gas piping 23 between air pump 1 and the air bag 4; Described supporting mechanism comprises the back-up block 5 for the supporting deformation car body, the described back-up block 5 telescopic upper ends that are arranged at supporting mechanism.When gas transmission 23 pipe that connects between air pump 1 and the air bag 4, that cylinder body 3 in the supporting mechanism outside is provided with an air extractor vent, gas piping 23 passes this air extractor vent and links to each other with air bag, and described air extractor vent can be arranged on the bottom of cylinder body 3, also can be arranged on the sidewall of cylinder body 3.
Referring to Fig. 1, supporting mechanism of the present invention also comprises piston 6, and piston 6 slidably is arranged in the cylinder body 3; Be fixed with a bearing cap shim that raises up 7 in the upper end of piston 6, between bearing cap shim 7 and piston 6, form cavity 8, in described cavity 8, be provided with steady ring 91 and a lower steady ring 92 on one, between upper steady ring 91 and lower steady ring 92, be fixed with a thrust baring 10, described upper steady ring 91 pushes against with bearing cap shim 7, and described lower steady ring 92 pushes against with piston 6; Piston rod 9 stretches in the cavity 8 after passing upper steady ring 91 from the top of bearing cap shim 7, the upper surface of the lower end of piston rod 9 and thrust baring 10 pushes against, also be fixed with a rotating shaft 11 in the bottom of piston rod 9, at rotating shaft 11 covers a locating piece 12 is arranged, also be fixed with a block 13 in the lower end of rotating shaft 11, described locating piece 12 is stuck between the lower surface and block 13 of thrust baring 10; The upper end of described piston rod 9 is fixed with a synchronous pulley 14, being fixed with one at cylinder body 3 is provided the motor 15 of power and in the rotating shaft of motor 15 runner 16 is installed by storage battery, described runner 16 drives synchronous pulley 14 and then drive piston rod 9 rotations by belt, runner 16 is substantially concordant with the height of synchronous pulley 14 when mounted, so just can make belt keep level and smooth, can also reduce the friction between belt and the wheel; Top at cylinder body 3 also is provided with ball-bearing casing 19, synchronous pulley 14 is by ball-bearing casing 19 and cylinder body 3 normal-running fiies, not only can play a supporting role to synchronous pulley by ball-bearing casing, can also prevent synchronous pulley when rotating to the both sides run-off the straight, so that synchronous pulley remains the spigot shaft coaxle with piston rod.Described piston rod 9 is the cylindrical structure of upper end open, and screw rod 17 inserts in the piston rod 9 and with piston rod 9 and is threaded, and also is provided with spherical hinge 18 in the lower end of back-up block 5, and described screw rod 17 is flexibly connected by spherical hinge 18 and back-up block 5.Also be fixed with a band wheel cover 21 on the top of cylinder body 3, synchronous pulley 14 is arranged in the band wheel cover 21, all leave through hole in upper end and side with wheel cover 21, screw rod 17 passes from the top through hole with wheel cover 21, and the belt on the motor runner 16 penetrates with synchronous pulley 14 from the through hole with wheel cover 21 sides and links to each other.
Referring to Fig. 1, because piston rod 9 will drive thrust baring 10 rotations when rotating, and the upper steady ring 91 of thrust baring 10 upper/lower terminals and lower steady ring 92 are all fixed, therefore for reducing the friction between upper steady ring 91 and lower steady ring 92 and the thrust baring 10, thrust baring 10 and upper steady ring 91 and and lower steady ring 92 between be respectively equipped with packing ring 20.Just thrust baring 10 and upper and lower steady ring can be kept apart by packing ring 20 like this, and packing ring 20 can adopt the softer plastics of material or rubber etc., so that thrust baring 10 inside can not be stuck when rotated.In the present invention, upper steady ring 91 and lower steady ring 92 are bearing.
Referring to Fig. 1, in the supporting mechanism of the present invention, the purpose that rotating shaft 11 is set in the lower end of piston rod 9 is, makes around the shaft 11 rotations of piston rod 9, prevents that piston rod 9 is offset when rotating, and therefore is arranged at rotating shaft 11 on the central axis of piston rod 9; The locating piece 12 that is enclosed within simultaneously in the rotating shaft 11 can not only play upwards spacing, can also play the spacing of left and right direction, when mounted, the left and right two ends that make locating piece 12 push against with the inwall both sides of lower steady ring 92 respectively, so just can limit the position of rotating shaft 11, make it keep in the vertical direction and coaxial with the central axis of piston rod 9.
Referring to Fig. 1, cylinder body 3 of the present invention can be set to split-type structural, namely is made of the cylinder cap at top and the cup shell of lower end, and is with bolts between cylinder cap and the cup shell, more convenient like this dismounting.For making the manufacturing simple possible and controlling cost, the material of cylinder body adopts 45 steel seamless steel tubes of national standard, cylinder base and the parts that each separates all adopt welding manner to connect, because 45 steel are dead-soft steeies, therefore it has advantages of that the welding mechanics performance is good, and is simpler, laborsaving when making.
Because supporting mechanism has had the support of cylinder body, therefore air bag mainly seals among the present invention, thereby the manufacturing requirement to air bag can reduce, at this, the double-decker that the overcoat that air bag of the present invention adopts the liner made by elastomeric material and nylon cloth to make forms is provided with french talc between the liner of air bag and overcoat, can prevent from like this that air bag from bonding together to be broken through when working, and air bag compresses rear thickness less than 25 mm, thereby can reduce cost of manufacture.
The present invention adopts the mode carry air pump to solve propulsion source problem after automobile gets into an accident, adopting the unitized construction of air bag and self extending formula supporting mechanism to solve traditional expansion tool (hydraulic jack, Pneumatic jack, air bag jack etc.) can not be for the problem of saving oneself because of the restriction of weight, forced stroke, self size and work system, and manufacturing is more prone to, and has overcome traditional expanding mechanism and has made demanding defective.
Need to prove, above embodiment is only in order to technical solution of the present invention to be described but not the restriction technologies scheme, although the applicant has done detailed description with reference to preferred embodiment to the present invention, those of ordinary skill in the art is to be understood that, the modification that those carry out technical solution of the present invention or be equal to replacement, aim and the scope that can not break away from the technical program all should be encompassed in the middle of the claim scope of the present invention.
Claims (8)
1. vehicle self-saving expander, it is characterized in that, comprise for the supporting mechanism of dilatating and deformable car body with for the actuating unit that expansion power is provided to described supporting mechanism, described actuating unit is by air pump (1) and is used for consisting of to the storage battery (2) of air pump (1) power supply; The lower end of described supporting mechanism slidably is arranged in the cylinder body (3), is provided with air bag (4) between the bottom surface of the bottom surface of supporting mechanism and cylinder body (3), and the air pump (1) in the actuating unit is given air bag (4) inflation by gas piping (23); Described supporting mechanism comprises for the back-up block of supporting deformation car body (5), the telescopic upper end that is arranged at supporting mechanism of described back-up block (5);
Described supporting mechanism also comprises piston (6), and described piston (6) slidably is arranged in the cylinder body (3); Be fixed with a bearing cap shim that raises up (7) in the upper end of piston (6), between bearing cap shim (7) and piston (6), form cavity (8), in described cavity (8), be provided with a upper steady ring (91) and a lower steady ring (92), between upper steady ring (91) and lower steady ring (92), be fixed with a thrust baring (10), described upper steady ring (91) pushes against with bearing cap shim (7), and described lower steady ring (92) pushes against with piston (6); Piston rod (9) stretches in the cavity (8) after passing upper steady ring (91) from the top of bearing cap shim (7), the upper surface of the lower end of piston rod (9) and thrust baring (10) pushes against, also be fixed with a rotating shaft (11) in the bottom of piston rod (9), at rotating shaft (11) cover a locating piece (12) is arranged, also be fixed with a block (13) in the lower end of rotating shaft (11), described locating piece (12) is stuck between the lower surface and block (13) of thrust baring (10); The upper end of described piston rod (9) is fixed with a synchronous pulley (14), be fixed with a motor (15) and in the rotating shaft of motor (15) runner (16) be installed at cylinder body (3), described runner (16) drives synchronous pulley (14) and then drive piston rod (9) rotation by belt; Described piston rod (9) is the cylindrical structure of upper end open, and screw rod (17) inserts in the piston rod (9) and with piston rod (9) and is threaded, and the upper end of screw rod (17) links to each other with back-up block (5).
2. vehicle self-saving expander according to claim 1 is characterized in that, the double-decker that the overcoat that the liner that described air bag (4) is made by elastomeric material and nylon cloth are made forms also is provided with french talc between the liner of air bag (4) and overcoat.
3. vehicle self-saving expander according to claim 1 and 2 is characterized in that, also is provided with air valve (22) on the gas piping (23) between air pump (1) and the air bag (4).
4. vehicle self-saving expander according to claim 3 is characterized in that, is provided with spherical hinge (18) in the lower end of back-up block (5), and described back-up block (5) is flexibly connected by spherical hinge (18) and screw rod (17).
5. vehicle self-saving expander according to claim 4 is characterized in that, is provided with ball-bearing casing (19) on the top of cylinder body (3), and described synchronous pulley (14) is by ball-bearing casing (19) and cylinder body (3) normal-running fit.
6. vehicle self-saving expander according to claim 3 is characterized in that, thrust baring (10) and upper steady ring (91) and and lower steady ring (92) between be respectively equipped with packing ring (20).
7. vehicle self-saving expander according to claim 3 is characterized in that, described rotating shaft (11) is positioned on the central axis of piston rod (9).
8. vehicle self-saving expander according to claim 7 is characterized in that, also is fixed with a band wheel cover (21) on the top of cylinder body (3), and described synchronous pulley (14) is arranged in the band wheel cover (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010240134 CN101898735B (en) | 2010-07-29 | 2010-07-29 | Vehicle self-saving expander |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010240134 CN101898735B (en) | 2010-07-29 | 2010-07-29 | Vehicle self-saving expander |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101898735A CN101898735A (en) | 2010-12-01 |
| CN101898735B true CN101898735B (en) | 2013-01-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010240134 Expired - Fee Related CN101898735B (en) | 2010-07-29 | 2010-07-29 | Vehicle self-saving expander |
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| Country | Link |
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| CN (1) | CN101898735B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107601342A (en) * | 2016-07-11 | 2018-01-19 | 北京汽车股份有限公司 | Vehicle |
| CN109787394A (en) * | 2017-11-15 | 2019-05-21 | 天津职业技术师范大学 | A kind of driving motor for electric automobile |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB204098A (en) * | 1922-06-16 | 1923-09-17 | Pedro De Queiroz Gaivaeo | Improvements in jacks for lifting and other purposes |
| US1492159A (en) * | 1922-06-06 | 1924-04-29 | Caretta Ettore | Lifting jack |
| US5441237A (en) * | 1994-07-28 | 1995-08-15 | Sweeney; Charles F. | Pneumatic vehicle jack |
| CN1989018A (en) * | 2004-07-27 | 2007-06-27 | 株式会社普利司通 | Air bladder for safety tire |
| CN201288046Y (en) * | 2008-09-22 | 2009-08-12 | 钟爱民 | Bar shaped hoisting air chamber |
| CN201729630U (en) * | 2010-07-29 | 2011-02-02 | 重庆理工大学 | Expander device |
-
2010
- 2010-07-29 CN CN 201010240134 patent/CN101898735B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1492159A (en) * | 1922-06-06 | 1924-04-29 | Caretta Ettore | Lifting jack |
| GB204098A (en) * | 1922-06-16 | 1923-09-17 | Pedro De Queiroz Gaivaeo | Improvements in jacks for lifting and other purposes |
| US5441237A (en) * | 1994-07-28 | 1995-08-15 | Sweeney; Charles F. | Pneumatic vehicle jack |
| CN1989018A (en) * | 2004-07-27 | 2007-06-27 | 株式会社普利司通 | Air bladder for safety tire |
| CN201288046Y (en) * | 2008-09-22 | 2009-08-12 | 钟爱民 | Bar shaped hoisting air chamber |
| CN201729630U (en) * | 2010-07-29 | 2011-02-02 | 重庆理工大学 | Expander device |
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|---|---|
| CN101898735A (en) | 2010-12-01 |
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Granted publication date: 20130102 Termination date: 20130729 |