US3128674A - Multiple stage telescopic cylinders - Google Patents
Multiple stage telescopic cylinders Download PDFInfo
- Publication number
- US3128674A US3128674A US204844A US20484462A US3128674A US 3128674 A US3128674 A US 3128674A US 204844 A US204844 A US 204844A US 20484462 A US20484462 A US 20484462A US 3128674 A US3128674 A US 3128674A
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- cylinders
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/16—Characterised by the construction of the motor unit of the straight-cylinder type of the telescopic type
Definitions
- the present invention provides a multiplicity of concentric double acting cylinders, one adapted to nest inside the other, to form a telescopic unit, a source of fluid under pressure, a piston member adapted to tit in the smaller of said cylinders, said smaller cylinders receiving fluid under pressure to extend the piston axially of the remaining concentric cylinders, inlet means into the remaining cylinders introducing uid under pressure into all of the cylinders except said smaller cylinder whereby to expand said cylinders axially one with the other, means supplying a continuous uid pressure on all cylinders constantly urging them toward the closed position and control means selectively delivering uid from the source of fluid to the said ⁇ smaller cylinder and the concentric cylinders to override the constant pressure urging the cylinders to the closed position.
- FIGURE 1 is a longitudinal section through a telescopic cylinder according to our invention.
- FIGURE 2 is a section through the cylinder of FIG- URE 1 with all cylinders except one partially extended;
- FIGURE 3 is a section through the cylinder of FIG- URE l with all cylinders extended;
- FIGURE 4 is a section through the cylinder of FIG- URE l with only the base cylinder extended;
- FIGURE 6 is a section on line Vl-VI of FIGURE 2.
- a multiple stage telescopic cylinder made up of a plurality of nesting telescopic cylinders 12, 13 and 14 surrounding an inner smaller cylinder 11 carrying a piston 10. Fluid is continuously delivered from sump 15, through pump 16, and
- An annular passage 19 carries the fluid through the body of the piston 1,0 to a passageway 20, communicating from the annular passage 19 to an annular space 21, surrounding the piston 10.
- Each of the cylinders 13, 14 and 11 are provided with similar annular spaces 13a, 14a and 11a, and with spaced passages through the walls 13b and 13C, 14b and 14e, and 11b and 11e.
- This fluid acts within the annular space to urge the cylinders into the closed position by acting, for example, upon the shoulder 13d of cylinder 13 and shoulder 12a of cylinder 12, and the corresponding shoulders of each other pair of cylinders.
- the uid passes around the stops 22 which are spaced annularly on each of the cylinders to prevent their being forced off one another.
- both valves 24 and 28 are opened and fluid is introduced through both ports 18 and 30.
- the valves 2S and 24 are closed, the uid is returned from the enlarged area 27, back through the line 23, the valve 24 and into return line 34, delivering the fluid back to sump 15 and simultaneously from the area 33 through line 29, valve 28 and line 34 to the sump 15. This is all accomplished by the continuous pressure which is applied on the shoulders of the cylinders by the fluid from the line 17 and port 18.
- Trunnions 40 are provided on the outer housing of the cylinder 12 to mount the piston and cylinder assembly.
- a clevis 41 is provided on the end of piston 10 for attachment to a driving member to be operated by the piston.
- a multistage telescoping cylinder unit comprising a plurality of concentric cylinders, one adapted to nest inside the next adjacent one to form a telescopic unit, a source of fluid under pressure, a piston member adapted to fit the smallest of said cylinders, said smallest cylinder receiving fluid under pressure to extend the piston axially thereof, inlet means in the piston communicating with the interior of all of the cylinders introducing uid under pressureinto the interior of all of said cylinders except the smallest cylinder whereby the cylinders may be expanded, means supplying a continuous fluid pressure between the walls of the several cylinders constantly urging them towards the closed position and control means selectively delivering fluid from the source of fluid to the smallest cylinder and the concentric cylinders whereby to override the constant pressure urging the cylinders to the closed position.
- a multistage telescoping cylinder unit comprising a plurality of concentric cylinders, one adapted to nest inside the next adjacent one to form a telescopic unit, a source of fluid under pressure, a piston member adapted to fit in the smallest of said cylinders, said smallest cylinder receiving uid under pressure to extend the piston axially thereof, inlet means in the piston communicating through the piston and smallest cylinder between the source of fluid and the interior of all of the cylinders introducing iuid under pressure into the interior of all of sa-id cylinders except the smallest cylinder whereby the cylinders may be expanded, means supplying a continuous iluid pressure between the Walls of the several cylinders constantly urging them towards the closed position and control means selectively deliveringizid from the source of iluid to the smallest cylinder and 4the concentric cylinders whereby to override the constant pressure urging the cylinders to the closed position.
- a multistage telescoping cylinder unit comprising a plurality of concentric cylinders, one adapted to nest inside the next adjacent one to form a telescopic unit, a source of uid under pressure, a piston member adapted to tit in the smallest of said cylinders, a chamber in the smallest cylinder at the end of the piston member, inlet means on the piston communicating between said chamber and the source of iluid, said smallest cylinder receiving uid under pressure through said inlet to extend the piston axially thereof, second inlet means in the piston communicating through the piston and smallest cylinder from the source of tluid to the interior of all of the cylinders introducing uid under pressure into the interior of all of said cylinders except the smallest cylinder whereby the cylinders may be expanded, third inlet means in the piston communicating With the source of fluid supplying a continuous lluid pressure between the walls of the several cylinders constantly urging them towards the closed position and control means selectively delivering fluid from the source
- a multistage telescoping cylinder unit comprising a plurality of concentric cylinders, one adapted to nest inside the next adjacent one to form a telescopic unit, and spaced from each other to form an annular space therebetween, a sealing shoulder adjacent each end of each such cylinder sealing engaging the next adjacent cylinder, a source of uid under pressure, a piston member adapted to t in the smallest of said cylinders, a chamber in the smallest cylinder at the end of the piston member, inlet means on the piston communicating between said chamber and the source of Huid, said smallest cylinder receiving iluid under pressure through said inlet to extend the piston axially thereof, second inlet means in the piston communicating with the interior of all of the cylinders introducing fluid under pressure into.
- third inlet means in the piston communicating with the source of uid supplying a continuous fluid pressure into the annular spaces between the walls of the several cylinders and bearing on the sealing shoulders constantly urging the cylinders towards the closed position and control means selectively delivering iluid from the source of fluid to the smallest cylinder and the concentric cylinders whereby to override the constant pressure urging the cylinders to the closed position;
- a multistage telescoping cylinder comprising a plurality of concentric cylinders of successively larger diameter, one adapted to nest inside the next adjacent larger one to form a telescopic unit, and spaced from each other to form an annular space therebetween, a sealing shoulder adjacent each end of each said cylinder sealing engaging the next adjacent cylinders to close said annular space, a piston member adapted to t in the smallest of said cylinders, a chamber in the smallest cylinder at the end of the piston member, inlet means on the piston communicating with said chamber, said smallest cylinder receiving uid under pressure through said inlet to extend the piston axially thereof, second inlet means in the piston communicating with the interior of all of the cylinders introducing fluid under pressure into the interior of all of said cylinders except the smallest cylinder whereby the cylinders may be expanded, third inlet means in said piston admitting a continuous fluid pressure and means communicating through the walls of said cylinders between the annular spaces whereby uid admitted by said third inlet means
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Actuator (AREA)
Description
April 14, 1964 N. GANCHAR ETAL 3,128,674-
MULTIPLE STAGE TELESCOPIC` CYLINDERS 2 Sheets-Sheet 1 Filed June 25, 1962 April 14, 1964 f N, GANCHAR ETAL 3,128,674
MULTIPLE STAGE TELESCOPIC CYLINDERS Filed June 25, 1962 2vsneets-sheet 2 United States Patent O 3,128,674 MULTIPLE STAGE TELESCOPIC CYLINDERS Leonard N. Ganchar, Canlield, and John Petro, Hubbard, Ohio, assignors to Commercial Shearing & Stamping Company, Youngstown, Ohio Filed June 25, 1962, Ser. No. 204,844 6 Claims. (Cl. 91-167) This invention relates to multiple stage hydraulic cylinders and particularly to a multiple stage hydraulic cylinder which may be extended in controlled increments.
There has long been a need for a multiple stage telescopic cylinder which could be expanded in controlled positive increments and would be double acting. Such cylinders could be used in a variety of applications, such as for example, the packing cylinder in a refuse truck, in hydraulic press applications, in truck unloading devices or the like. Conventional telescopic cylinders operate slowly over short distances and are difficult to control. This creates very real problems where rapid expansion and contraction are required over a short distance so that only a small part of the cylinder is expanded, whereas full expansion is required cyclically or periodically. In the case of refuse trucks, for example, it is the practice to expand the cylinder over a very short distance periodically to move refuse into a storage portion of the truck remote from the charging door and to finally expand the cylinder over a measured portion of its length periodically to pack the refuse. In such applications, conventional telescopic hydraulic cylinders move too slowly and in the nal packing operation may expand too far and damage the truck assembly. No multiple stage cylinder suitable for the service herein described has, to our knowledge, heretofore been available.
The present invention provides a multiplicity of concentric double acting cylinders, one adapted to nest inside the other, to form a telescopic unit, a source of fluid under pressure, a piston member adapted to tit in the smaller of said cylinders, said smaller cylinders receiving fluid under pressure to extend the piston axially of the remaining concentric cylinders, inlet means into the remaining cylinders introducing uid under pressure into all of the cylinders except said smaller cylinder whereby to expand said cylinders axially one with the other, means supplying a continuous uid pressure on all cylinders constantly urging them toward the closed position and control means selectively delivering uid from the source of fluid to the said `smaller cylinder and the concentric cylinders to override the constant pressure urging the cylinders to the closed position.
In the foregoing general description we have set out certain objects, purposes and advantages of our invention. Other objects, purposes and advantages will be apparent from a consideration of the following description and the accompanying drawings in which:
FIGURE 1 is a longitudinal section through a telescopic cylinder according to our invention;
FIGURE 2 is a section through the cylinder of FIG- URE 1 with all cylinders except one partially extended;
FIGURE 3 is a section through the cylinder of FIG- URE l with all cylinders extended;
FIGURE 4 is a section through the cylinder of FIG- URE l with only the base cylinder extended;
FIGURE 5 is a schematic showing of the cylinder of FIGURE 1 and hydraulic circuit for its operation; and
FIGURE 6 is a section on line Vl-VI of FIGURE 2.
Referring to the drawings we have illustrated a multiple stage telescopic cylinder made up of a plurality of nesting telescopic cylinders 12, 13 and 14 surrounding an inner smaller cylinder 11 carrying a piston 10. Fluid is continuously delivered from sump 15, through pump 16, and
3,128,674 Patented Apr. 14, 1964 ICC line 17 to inlet port 18 in the piston 10. An annular passage 19 carries the fluid through the body of the piston 1,0 to a passageway 20, communicating from the annular passage 19 to an annular space 21, surrounding the piston 10. Each of the cylinders 13, 14 and 11 are provided with similar annular spaces 13a, 14a and 11a, and with spaced passages through the walls 13b and 13C, 14b and 14e, and 11b and 11e. This fluid acts within the annular space to urge the cylinders into the closed position by acting, for example, upon the shoulder 13d of cylinder 13 and shoulder 12a of cylinder 12, and the corresponding shoulders of each other pair of cylinders. The uid passes around the stops 22 which are spaced annularly on each of the cylinders to prevent their being forced off one another.
When it is desired to extend cylinders 12, 13 and 14, fluid under pressure is delivered from pump 16 through valve 24 and line 23, into the port 25 from which it passes through axial duct 26 within the cylinder 11 into the enlarged area 27 with the cylinders 12, 13 and 14. As a result, all cylinders 12, 13 and 14 are elongated, overcoming the pressure of the fluid acting on the smaller shoulder areas 13a', for example, of the several cylinders. n
If it is desired to operate the small piston 10 alone, uid is introduced from the pump 16 through valve 28, line 29, into port 30. It passes along the annular axially extending passage 31, through port 32 into the area 313 between the piston 10 and the cylinder 11, thus forcing the piston 10 out of the cylinder 11.
When it is desired to operate all of the cylinders and the piston 10, both valves 24 and 28 are opened and fluid is introduced through both ports 18 and 30. When the valves 2S and 24 are closed, the uid is returned from the enlarged area 27, back through the line 23, the valve 24 and into return line 34, delivering the fluid back to sump 15 and simultaneously from the area 33 through line 29, valve 28 and line 34 to the sump 15. This is all accomplished by the continuous pressure which is applied on the shoulders of the cylinders by the fluid from the line 17 and port 18.
Trunnions 40 are provided on the outer housing of the cylinder 12 to mount the piston and cylinder assembly. A clevis 41 is provided on the end of piston 10 for attachment to a driving member to be operated by the piston.
While we have illustrated and described a presently preferred embodiment of our invention in the foregoing specification it will be understood that this invention may be otherwise embodied within the scope of the following claims.
We claim:
1. A multistage telescoping cylinder unit comprising a plurality of concentric cylinders, one adapted to nest inside the next adjacent one to form a telescopic unit, a source of fluid under pressure, a piston member adapted to fit the smallest of said cylinders, said smallest cylinder receiving fluid under pressure to extend the piston axially thereof, inlet means in the piston communicating with the interior of all of the cylinders introducing uid under pressureinto the interior of all of said cylinders except the smallest cylinder whereby the cylinders may be expanded, means supplying a continuous fluid pressure between the walls of the several cylinders constantly urging them towards the closed position and control means selectively delivering fluid from the source of fluid to the smallest cylinder and the concentric cylinders whereby to override the constant pressure urging the cylinders to the closed position.
2. A multistage telescoping cylinder unit comprising a plurality of concentric cylinders, one adapted to nest inside the next adjacent one to form a telescopic unit, a source of fluid under pressure, a piston member adapted to fit in the smallest of said cylinders, said smallest cylinder receiving uid under pressure to extend the piston axially thereof, inlet means in the piston communicating through the piston and smallest cylinder between the source of fluid and the interior of all of the cylinders introducing iuid under pressure into the interior of all of sa-id cylinders except the smallest cylinder whereby the cylinders may be expanded, means supplying a continuous iluid pressure between the Walls of the several cylinders constantly urging them towards the closed position and control means selectively delivering luid from the source of iluid to the smallest cylinder and 4the concentric cylinders whereby to override the constant pressure urging the cylinders to the closed position.
3. A multistage telescoping cylinder unit comprising a plurality of concentric cylinders, one adapted to nest inside the next adjacent one to form a telescopic unit, a source of uid under pressure, a piston member adapted to tit in the smallest of said cylinders, a chamber in the smallest cylinder at the end of the piston member, inlet means on the piston communicating between said chamber and the source of iluid, said smallest cylinder receiving uid under pressure through said inlet to extend the piston axially thereof, second inlet means in the piston communicating through the piston and smallest cylinder from the source of tluid to the interior of all of the cylinders introducing uid under pressure into the interior of all of said cylinders except the smallest cylinder whereby the cylinders may be expanded, third inlet means in the piston communicating With the source of fluid supplying a continuous lluid pressure between the walls of the several cylinders constantly urging them towards the closed position and control means selectively delivering fluid from the source of uid to the smallest cylinder and the concentric cylinders whereby to override the constant pressure urging the cylinders to the closed position.
4. A multistage telescoping cylinder unit comprising a plurality of concentric cylinders, one adapted to nest inside the next adjacent one to form a telescopic unit, and spaced from each other to form an annular space therebetween, a sealing shoulder adjacent each end of each such cylinder sealing engaging the next adjacent cylinder, a source of uid under pressure, a piston member adapted to t in the smallest of said cylinders, a chamber in the smallest cylinder at the end of the piston member, inlet means on the piston communicating between said chamber and the source of Huid, said smallest cylinder receiving iluid under pressure through said inlet to extend the piston axially thereof, second inlet means in the piston communicating with the interior of all of the cylinders introducing fluid under pressure into. the interior of all of said cylinders except the smallest cylinder whereby the cylinders may be expanded, third inlet means in the piston communicating with the source of uid supplying a continuous fluid pressure into the annular spaces between the walls of the several cylinders and bearing on the sealing shoulders constantly urging the cylinders towards the closed position and control means selectively delivering iluid from the source of fluid to the smallest cylinder and the concentric cylinders whereby to override the constant pressure urging the cylinders to the closed position;
5. A multistage telescoping cylinder comprising a plurality of concentric cylinders of successively larger diameters, one adapted to nest inside the next adjacent larger one to form a telescopic unit, a piston member adapted to t in the smallest of said cylinders, said smallest cylinder receiving fluid under pressure to extend the piston axially thereof, inlet means in the piston communicating with the interior of all of the cylinders admitting lluid under pressure into the interior of all of said cylinders except the smallest cylinder whereby the cylinders may be expanded, and inlet means admitting a continuous uid pressure between the walls of the several cylinders constantly urging them towards the closed position.
6. A multistage telescoping cylinder comprising a plurality of concentric cylinders of successively larger diameter, one adapted to nest inside the next adjacent larger one to form a telescopic unit, and spaced from each other to form an annular space therebetween, a sealing shoulder adjacent each end of each said cylinder sealing engaging the next adjacent cylinders to close said annular space, a piston member adapted to t in the smallest of said cylinders, a chamber in the smallest cylinder at the end of the piston member, inlet means on the piston communicating with said chamber, said smallest cylinder receiving uid under pressure through said inlet to extend the piston axially thereof, second inlet means in the piston communicating with the interior of all of the cylinders introducing fluid under pressure into the interior of all of said cylinders except the smallest cylinder whereby the cylinders may be expanded, third inlet means in said piston admitting a continuous fluid pressure and means communicating through the walls of said cylinders between the annular spaces whereby uid admitted by said third inlet means enters between the walls of the several cylinders constantly urging them towards the closed position.
No references cited.
Claims (1)
1. A MULTISTAGE TELESCOPING CYLINDER UNIT COMPRISING A PLURALITY OF CONCENTRIC CYLINDERS, ONE ADAPTED TO NEST INSIDE THE NEXT ADJACENT ONE TO FORM A TELESCOPIC UNIT, A SOURCE OF FLUID UNDER PRESSURE, A PISTON MEMBER ADAPTED TO FIT THE SMALLEST OF SAID CYLINDERS, SAID SMALLEST CYLINDER RECEIVING FLUID UNDER PRESSURE TO EXTEND THE PISTON AXIALLY THEREOF, INLET MEANS IN THE PISTON COMMUNICATING WITH THE INTERIOR OF ALL OF THE CYLINDERS INTRODUCING FLUID UNDER PRESSURE INTO THE INTERIOR OF ALL OF SAID CYLINDERS EXCEPT THE SMALLEST CYLINDER WHEREBY THE CYLINDERS MAY BE EXPANDED, MEANS SUPPLYING A CONTINUOUS FLUID PRESSURE BETWEEN THE WALLS OF THE SEVERAL CYLINDERS CONSTANTLY URGING THEM TOWARDS THE CLOSED POSITION AND CONTROL MEANS SELECTIVELY DELIVERING FLUID FROM THE SOURCE OF FLUID TO THE SMALLEST CYLINDER AND THE CONCENTRIC CYLINDERS WHEREBY TO OVERRIDE THE CONSTANT PRESSURE URGING THE CYLINDERS TO THE CLOSED POSITION.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US204844A US3128674A (en) | 1962-06-25 | 1962-06-25 | Multiple stage telescopic cylinders |
GB22331/63A GB966364A (en) | 1962-06-25 | 1963-06-05 | Multiple stage telescopic cylinders |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US204844A US3128674A (en) | 1962-06-25 | 1962-06-25 | Multiple stage telescopic cylinders |
Publications (1)
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US3128674A true US3128674A (en) | 1964-04-14 |
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US204844A Expired - Lifetime US3128674A (en) | 1962-06-25 | 1962-06-25 | Multiple stage telescopic cylinders |
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US (1) | US3128674A (en) |
GB (1) | GB966364A (en) |
Cited By (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3282357A (en) * | 1965-05-12 | 1966-11-01 | John R Bunn | Hydraulic derrick assembly |
US3567098A (en) * | 1966-12-23 | 1971-03-02 | Bostitch Div Of Textron | Fastener driving apparatus operable under pressure conditions greater than line pressure |
US3650142A (en) * | 1969-07-18 | 1972-03-21 | Western Electric Co | Method of and apparatus for decreasing the spacing between articles |
US3957125A (en) * | 1971-09-03 | 1976-05-18 | Russell Jr Wayne B | Multi-stage double-acting extendible and contractible shaft drive for drilling device |
US4691617A (en) * | 1986-02-14 | 1987-09-08 | Arkansas Precision Hydraulics, Inc. | Multi-section sweep cycle compaction cylinder |
US4976187A (en) * | 1988-08-24 | 1990-12-11 | Crane Carrier Company | Fast sweep power cylinder for refuse trucks |
US5322004A (en) * | 1993-02-25 | 1994-06-21 | Sims James O | Telescoping fluid actuator |
US5341724A (en) * | 1993-06-28 | 1994-08-30 | Bronislav Vatel | Pneumatic telescoping cylinder and method |
US6029559A (en) * | 1998-04-06 | 2000-02-29 | Grove U.S. L.L.C. | Telescoping system with multiple single-stage telescopic cylinders |
US6116140A (en) * | 1998-04-06 | 2000-09-12 | Grove U.S. L.L.C. | Telescoping system with multi-stage telescopic cylinder |
US20110036084A1 (en) * | 2008-02-21 | 2011-02-17 | Roeland Mallan | Vehicle cab tilting device with telescopic tilting cylinder |
US20140291085A1 (en) * | 2013-03-30 | 2014-10-02 | Ronald Scott Bandy | Segmented Air Shock |
ES2535128A1 (en) * | 2014-06-26 | 2015-05-05 | Enrique GONZÁLEZ BLANCO | Pneumatic telescopic compressor cylinders (Machine-translation by Google Translate, not legally binding) |
US20150285243A1 (en) * | 2014-04-07 | 2015-10-08 | i2r Solutions USA LLC | Hydraulic Pumping Assembly, System and Method |
WO2016001919A1 (en) * | 2014-06-30 | 2016-01-07 | Therma Sphera Ltd. | Boosting in hydraulic and pneumatic devices |
WO2016155833A1 (en) * | 2015-04-02 | 2016-10-06 | Sandvik Intellectual Property Ab | Extendable cylinder, drill head, and method |
US10214071B1 (en) | 2016-05-28 | 2019-02-26 | PAL Suspension LLC | Vehicle suspension system with multi-stage hydraulic cylinder assemblies and external spring packs |
US10697250B2 (en) * | 2015-04-02 | 2020-06-30 | Sandvik Intellectual Property Ab | Multi-functional connector, drill head, and method |
US10737545B1 (en) | 2019-12-19 | 2020-08-11 | PAL Suspension LLC | Vehicle suspension system with multi-stage hydraulic cylinder assemblies and external spring packs |
US11278910B2 (en) * | 2015-05-17 | 2022-03-22 | Creator, Inc. | Systems and method for grinding a food product |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2634257A1 (en) * | 1988-07-13 | 1990-01-19 | Hardy | Double-action telescopic hydraulic jack. |
-
1962
- 1962-06-25 US US204844A patent/US3128674A/en not_active Expired - Lifetime
-
1963
- 1963-06-05 GB GB22331/63A patent/GB966364A/en not_active Expired
Non-Patent Citations (1)
Title |
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None * |
Cited By (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3282357A (en) * | 1965-05-12 | 1966-11-01 | John R Bunn | Hydraulic derrick assembly |
US3567098A (en) * | 1966-12-23 | 1971-03-02 | Bostitch Div Of Textron | Fastener driving apparatus operable under pressure conditions greater than line pressure |
US3650142A (en) * | 1969-07-18 | 1972-03-21 | Western Electric Co | Method of and apparatus for decreasing the spacing between articles |
US3957125A (en) * | 1971-09-03 | 1976-05-18 | Russell Jr Wayne B | Multi-stage double-acting extendible and contractible shaft drive for drilling device |
US4691617A (en) * | 1986-02-14 | 1987-09-08 | Arkansas Precision Hydraulics, Inc. | Multi-section sweep cycle compaction cylinder |
US4976187A (en) * | 1988-08-24 | 1990-12-11 | Crane Carrier Company | Fast sweep power cylinder for refuse trucks |
US5322004A (en) * | 1993-02-25 | 1994-06-21 | Sims James O | Telescoping fluid actuator |
US5341724A (en) * | 1993-06-28 | 1994-08-30 | Bronislav Vatel | Pneumatic telescoping cylinder and method |
US6029559A (en) * | 1998-04-06 | 2000-02-29 | Grove U.S. L.L.C. | Telescoping system with multiple single-stage telescopic cylinders |
US6116140A (en) * | 1998-04-06 | 2000-09-12 | Grove U.S. L.L.C. | Telescoping system with multi-stage telescopic cylinder |
US20110036084A1 (en) * | 2008-02-21 | 2011-02-17 | Roeland Mallan | Vehicle cab tilting device with telescopic tilting cylinder |
US8245805B2 (en) * | 2008-02-21 | 2012-08-21 | Actuant Corporation | Vehicle cab tilting device with telescopic tilting cylinder |
US20140291085A1 (en) * | 2013-03-30 | 2014-10-02 | Ronald Scott Bandy | Segmented Air Shock |
US20190072147A1 (en) * | 2013-03-30 | 2019-03-07 | Ronald Scott Bandy | Multiple stage air shock |
US11236797B2 (en) * | 2013-03-30 | 2022-02-01 | Ronald Scott Bandy | Multiple stage air shock |
US20150285243A1 (en) * | 2014-04-07 | 2015-10-08 | i2r Solutions USA LLC | Hydraulic Pumping Assembly, System and Method |
US9822777B2 (en) * | 2014-04-07 | 2017-11-21 | i2r Solutions USA LLC | Hydraulic pumping assembly, system and method |
ES2535128A1 (en) * | 2014-06-26 | 2015-05-05 | Enrique GONZÁLEZ BLANCO | Pneumatic telescopic compressor cylinders (Machine-translation by Google Translate, not legally binding) |
WO2016001919A1 (en) * | 2014-06-30 | 2016-01-07 | Therma Sphera Ltd. | Boosting in hydraulic and pneumatic devices |
WO2016155833A1 (en) * | 2015-04-02 | 2016-10-06 | Sandvik Intellectual Property Ab | Extendable cylinder, drill head, and method |
CN107429549A (en) * | 2015-04-02 | 2017-12-01 | 山特维克知识产权股份有限公司 | Scalable cylinder, drill bit and method |
US10697250B2 (en) * | 2015-04-02 | 2020-06-30 | Sandvik Intellectual Property Ab | Multi-functional connector, drill head, and method |
US11278910B2 (en) * | 2015-05-17 | 2022-03-22 | Creator, Inc. | Systems and method for grinding a food product |
US10214071B1 (en) | 2016-05-28 | 2019-02-26 | PAL Suspension LLC | Vehicle suspension system with multi-stage hydraulic cylinder assemblies and external spring packs |
US10737545B1 (en) | 2019-12-19 | 2020-08-11 | PAL Suspension LLC | Vehicle suspension system with multi-stage hydraulic cylinder assemblies and external spring packs |
Also Published As
Publication number | Publication date |
---|---|
GB966364A (en) | 1964-08-12 |
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