US3696714A - Fluid-operated cylinder - Google Patents
Fluid-operated cylinder Download PDFInfo
- Publication number
- US3696714A US3696714A US4181*[A US3696714DA US3696714A US 3696714 A US3696714 A US 3696714A US 3696714D A US3696714D A US 3696714DA US 3696714 A US3696714 A US 3696714A
- Authority
- US
- United States
- Prior art keywords
- piston
- fluid
- interspace
- liner
- cylindrical housing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000007789 sealing Methods 0.000 claims abstract description 13
- 239000012530 fluid Substances 0.000 claims description 14
- 239000013536 elastomeric material Substances 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 2
- 239000012858 resilient material Substances 0.000 abstract description 13
- 239000000463 material Substances 0.000 abstract description 6
- 239000004033 plastic Substances 0.000 abstract description 3
- 229920003023 plastic Polymers 0.000 abstract description 3
- 239000002184 metal Substances 0.000 description 7
- 239000003795 chemical substances by application Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000009510 drug design Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- 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
- F15B15/1423—Component parts; Constructional details
- F15B15/1428—Cylinders
-
- 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
- F15B15/1423—Component parts; Constructional details
- F15B15/1438—Cylinder to end cap assemblies
- F15B15/1442—End cap sealings
-
- 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
- F15B15/1423—Component parts; Constructional details
- F15B15/1447—Pistons; Piston to piston rod assemblies
- F15B15/1452—Piston sealings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J10/00—Engine or like cylinders; Features of hollow, e.g. cylindrical, bodies in general
- F16J10/02—Cylinders designed to receive moving pistons or plungers
- F16J10/04—Running faces; Liners
Definitions
- the present invention relates to a fluid-operated cylinder both for single and double acting uses.
- the sealing between the piston and the cylindrical wall in fluid-operated cylinders is obtained by seals or gaskets of resilient material provided on the lateral surface of the piston.
- the main object of the present invention is that of providing a fluid-operated cylinder where the sealing between piston and housing is obtained for a much longer time period than that permissible in the cylinders in use at present.
- Another object is that of providing a fluid-operated cylinder which can be manufactured at a lower cost than the known types, the performance being equal.
- Another object of thisinvention is that of providing a fluid-operated cylinder of rational design and of efficient and regular operation.
- a fluidoperated cylinder characterized in that the sealing between piston and cylindrical housing is obtained by means of a tubular element of resilient material, such as rubber, plastics material or the like, which extends to a length at least equal to the piston stroke length and is arranged in such manner as to define the said cylindrical housing in which the said piston is slidably mounted, the latter being peripherally rounded and having a maximum diameter slightly greater than the inner diameter of the said tubular element.
- a tubular element of resilient material such as rubber, plastics material or the like
- FIG. 1 is an axial section view of the fluid-operated cylinder according to the invention
- FIGS. 2, 3 and 4 are partial axial section views of three respective embodiments of the fluid-operated cylinder according to the invention.
- the fluid-operated cylinder consists of a tubular metal housing 1, preferably cylindrical in shape, within which a tubular element or liner is arranged which is also preferably of cylindrical shape and consisting of resilient material, such as rubber, plastics material or like elastomeric material.
- the tubular element 2 defines a cylindrical space or chamber and extends to a length slightly longer than that of the piston stroke.
- the fluidoperated cylinder includes heads 3 which may be provided both for single and double-acting operation.
- a piston 5 Fixed to the stem 4 of the cylinder is a piston 5 without gaskets or seals and having a maximum diameter slightly larger than the inner diameter of the tubular element 2. With this arrangement the piston 5 causes the tubular element 2 to deform by pressing the same so as to provide the sealing. From FIG. 3 it appears clear that the liner 2c is pressed against the housing 1 thereby separating the interspace between the liner 2c and the housing 1 in two portions.
- the piston 5 secured to the stem 4, such as by welding, also has a rounded outline in order to permit the sliding movement within the cylindrical space without damaging the tubular element 2, thus also reducing friction along the contact surface.
- the rim 5a of the piston 5 has an arcuated outline in cross-section, which approximates a semicircle.
- a turn out edge 2a at each end of the tubular element 2 is provided which is arranged to secure the tubular element 2 to the heads 3 and to engage with a respective metal ring 6 which is positioned between the tubular housing 1 and the said tum-out edge 2a.
- a ring 7 is also connected to each end of the cylindrical housing 1, which has an inner shoulder 7a against which a ring 8 fixed to the cylindrical housing 1, abuts this ring 8 may consist, for example, of an elastic steel ring).
- the ring 7 is connected to the relative head 3 by means of screws 9 which are screwed into relative threaded holes formed in the ring 7.
- the ring 7 and head 3 may approach one another when screws 9 are tightened, thus causing the tum-out edge 2a to be pressed by the metal ring 6.
- the ring 7 acts on the ring 8 which is fixed to the cylindrical housing 1 and thus causes the latter to urge against the metal ring 6 and to press the tum-out edge 2a of the tubular element 2.
- this is a relative movement in so far as the cylindrical housing 1 being considered stationary, the screwing of the screws 9 causes the heads 3 to move towards the cylindrical housing.
- the rim 5a of this piston presses and slightly stresses the tubular element 2, because as stated above, the maximum diameter of piston 5 is greater than that of the inner diameter of the tubular elements 2, thus providing an effective sealing.
- the reciprocating movement of the piston 5 will cause wearing on the whole inner surface of the tubular element 2 between the heads 3. This is advantageous when bearing in mind that in conventional cylinders wear occurs on the gasket which is carried by the piston and is friction stressed during the whole piston stroke.
- the work point continuously moves along the tubular element 2, thus the wear is distributed on a large surface and a longer useful life is attained. It is thus possible to provide a sealing life considerably longer than that possible with conventional cylinders.
- the arrangement is completely similar to that described above except that the tubular element of resilient material is so arranged as to define a gap or tubular interspace with the cylindrical housing 1.
- This interspace contains an interspace fluid which is the same as the cylinder operating fluid.
- tubular element of resilient material has a thickness lower than that of the tubular element 2 in FIG. 1.
- the securing system of the tubular element of resilient material in such embodiments is substantially the same as that described above. The only difference is shown by the metal ring 60 which has an L-shaped cross-section instead of the rectangular cross-section of the metal ring 6 in FIG. 1.
- the said L-shaped cross-section of the metal ring 6a defines in fact the gap between the tubular element of resilient material and the cylindrical housing 1.
- tubular elements 20 and 2d are provided with holes at the ends thereof in the embodiments shown in FIGS. 3 and 4.
- tubular element 20 in FIG. 3 is formed with simple holes 10 at the ends thereof, while the tubular element 2d in FIG. 4 is provided with holes 1 1 having tabs 11a outwardly which act as single direction valves.
- FIGS. 3, 4 and 5 The operation in the embodiments shown in FIGS. 3, 4 and 5 is completely similar to that described above, one difference being that the tubular elements of resilient material are deformed to a larger extent, as clearly shown in the same Figures.
- the holes communicate the gap between the tubular element 2c and the cylindrical housing 1 with the relative work spaces defined by the piston 5. A fluid flow thus occurs throughout said holes 10.
- the fluid can thus enter the gap through the holes 1 l, but cannot come out.
- the fluid-operated cylinder according to the invention provides a regular and safe operation with a long useful life of the sealing between piston and cylindrical housing. Accuracy requirements in the geometrical and physical characteristics of the tube are also reduced, and thus the fluidoperated cylinder according to the invention may be manufactured at a lower cost relatively to the known types by making use of less costly material which may be machined with relatively large tolerances.
- the structure according to the invention also permits a ready manufacturing of cylinders having a standart section and of any shape (square or another form) so that the overall dimensions of the parallepipedon being equal, the trust surface is greater and rotation is prevented at the same time.
- Fu ermore the structure according to the invention pennits long stroke cylinder being readily manufactured.
- cylinder according to the invention may be manufactured for particular applications only with the tubular element of resilient material, thus dispensing with the holding outer housing 1.
- a fluid operated cylinder including a cylindrical housing, a piston slidable therein and a sealing member between said piston and said cylindrical housing, said sealing member being in the fonn of a deformable liner of substantially elastomeric material, said liner defining a cylinder cavity and extending over a length at least equal to the piston stroke length and allowing slidable movement of the piston therein, the normal diameter of said deformable liner being normally less than the inner diameter of said cylindrical housing thereby forming a tubular interspace therebetween, an interspace fluid within said interspace and wherein, according to the improvement, said liner has at least one opening at least near the end of stroke position of the piston, said opening providing communication between said tubular interspace and said cylinder cavity, said interspace fluid being the same as the cylinder operating fluid contained within said cylinder cavity and said piston having a diameter greater than the normal diameter of said liner and such as to press the liner portion nearest to said piston against the cylinder walls so as to separate thereby said interspace in two portions.
Abstract
A fluid-operated cylinder in which sealing between the piston and the cylindrical housing is provided by a tubular element of resilient material, such as rubber, plastics material and the like which is placed in said cylindrical housing and extends to a length at least equal to the piston stroke.
Description
United States Patent Panigati [54] FLUID-OPERATED CYLINDER [72] Inventor: Pier Luigi Panigati, Via Friuli 72,
Milan, Italy 221 Filed: Dec. 29, 1969 211 Appl.No.: 4,181 I [30] Foreign Application Priority Data [4 1 Oct. 10, 1972 Primary Examiner-Martin P. Schwadron Assistant Examiner-Allen M. Ostrager Att0rney-Guido Modiano and Albert Josif NOV. 1 l, 1969 Italy ..24269 A/69 I 57 ABSTRACT A fluid-operated cylinder in which sealing between the 8| piston and the cylindrical housing is provided y a m n 92 170 bular element of resilient maeri all, such as rubber, Fled of Search .7" l material and the which is placed in said cylindrical housing and extends to a length at least References Cited equal to the piston stroke.
UNITED STATES PATENTS 3,084,717 4/1963 Purcell ..92/170 x 858 3/1927 7 h wqp '"f?'f117tf'f"f92 1 O. t 7a 5a 8 l/ I PATENTEDnm 10 1912 SHEET 1 OF 2 INVENTOR. IER LUIGI PANIGATI AGENT PATENTEDHBI 1m 3,696,714 sum 2 0F 2 INVENTOR.
PIER LUlGl PANIGATI AGENT FLUID-OPERATED CYLINDER BACKGROUND OF THE INVENTION The present invention relates to a fluid-operated cylinder both for single and double acting uses.
As is known, the sealing between the piston and the cylindrical wall in fluid-operated cylinders is obtained by seals or gaskets of resilient material provided on the lateral surface of the piston.
Such seals, however, undergo a remarkable wear due to the continuous reciprocating movement of the piston, thus quite frequent replacement of these seals is required.
The main object of the present invention is that of providing a fluid-operated cylinder where the sealing between piston and housing is obtained for a much longer time period than that permissible in the cylinders in use at present.
Another object is that of providing a fluid-operated cylinder which can be manufactured at a lower cost than the known types, the performance being equal.
Another object of thisinvention is that of providing a fluid-operated cylinder of rational design and of efficient and regular operation.
SUMMARY OF THE INVENTION These and still further objects are attained by a fluidoperated cylinder according to the invention, characterized in that the sealing between piston and cylindrical housing is obtained by means of a tubular element of resilient material, such as rubber, plastics material or the like, which extends to a length at least equal to the piston stroke length and is arranged in such manner as to define the said cylindrical housing in which the said piston is slidably mounted, the latter being peripherally rounded and having a maximum diameter slightly greater than the inner diameter of the said tubular element.
BRIEF DESCRIPTION OF THE DRAWINGS Further characteristic features and advantages of the invention will better appear from the detailed description of a preferred, not exclusive, embodiment of a fluid-operated cylinder according to the invention, which is illustrated by way of not-limiting example in the following drawings, in which:
FIG. 1 is an axial section view of the fluid-operated cylinder according to the invention;
FIGS. 2, 3 and 4 are partial axial section views of three respective embodiments of the fluid-operated cylinder according to the invention.
DESCRIPTION OF THE PREFERRED EMBODIMENT With reference to FIG. 1 the fluid-operated cylinder according to the invention consists of a tubular metal housing 1, preferably cylindrical in shape, within which a tubular element or liner is arranged which is also preferably of cylindrical shape and consisting of resilient material, such as rubber, plastics material or like elastomeric material. The tubular element 2 defines a cylindrical space or chamber and extends to a length slightly longer than that of the piston stroke.
According to a known arrangement the fluidoperated cylinder includes heads 3 which may be provided both for single and double-acting operation.
Fixed to the stem 4 of the cylinder is a piston 5 without gaskets or seals and having a maximum diameter slightly larger than the inner diameter of the tubular element 2. With this arrangement the piston 5 causes the tubular element 2 to deform by pressing the same so as to provide the sealing. From FIG. 3 it appears clear that the liner 2c is pressed against the housing 1 thereby separating the interspace between the liner 2c and the housing 1 in two portions. The piston 5 secured to the stem 4, such as by welding, also has a rounded outline in order to permit the sliding movement within the cylindrical space without damaging the tubular element 2, thus also reducing friction along the contact surface.
As is lecally shown in FIG. 1, the rim 5a of the piston 5 has an arcuated outline in cross-section, which approximates a semicircle.
A turn out edge 2a at each end of the tubular element 2 is provided which is arranged to secure the tubular element 2 to the heads 3 and to engage with a respective metal ring 6 which is positioned between the tubular housing 1 and the said tum-out edge 2a. A ring 7 is also connected to each end of the cylindrical housing 1, which has an inner shoulder 7a against which a ring 8 fixed to the cylindrical housing 1, abuts this ring 8 may consist, for example, of an elastic steel ring). The ring 7 is connected to the relative head 3 by means of screws 9 which are screwed into relative threaded holes formed in the ring 7. By this arrangement at each end of the cylinder the ring 7 and head 3 may approach one another when screws 9 are tightened, thus causing the tum-out edge 2a to be pressed by the metal ring 6. By screwing the screws 9, the ring 7 acts on the ring 8 which is fixed to the cylindrical housing 1 and thus causes the latter to urge against the metal ring 6 and to press the tum-out edge 2a of the tubular element 2. Obviously this is a relative movement in so far as the cylindrical housing 1 being considered stationary, the screwing of the screws 9 causes the heads 3 to move towards the cylindrical housing.
From the above the operation of the fluid-operated cylinder according to the invention should appear evident.
During the reciprocating movement of the piston 5 within the cylindrical space, the rim 5a of this piston presses and slightly stresses the tubular element 2, because as stated above, the maximum diameter of piston 5 is greater than that of the inner diameter of the tubular elements 2, thus providing an effective sealing. The reciprocating movement of the piston 5 will cause wearing on the whole inner surface of the tubular element 2 between the heads 3. This is advantageous when bearing in mind that in conventional cylinders wear occurs on the gasket which is carried by the piston and is friction stressed during the whole piston stroke.
In other words in the fluid-operated cylinder according to the invention, the work point continuously moves along the tubular element 2, thus the wear is distributed on a large surface and a longer useful life is attained. It is thus possible to provide a sealing life considerably longer than that possible with conventional cylinders.
According to the embodiments shown in FIGS. 2, 3 and 4, the arrangement is completely similar to that described above except that the tubular element of resilient material is so arranged as to define a gap or tubular interspace with the cylindrical housing 1.
This interspace contains an interspace fluid which is the same as the cylinder operating fluid.
In these embodiments the tubular element of resilient material has a thickness lower than that of the tubular element 2 in FIG. 1.
Also the securing system of the tubular element of resilient material in such embodiments is substantially the same as that described above. The only difference is shown by the metal ring 60 which has an L-shaped cross-section instead of the rectangular cross-section of the metal ring 6 in FIG. 1.
The said L-shaped cross-section of the metal ring 6a defines in fact the gap between the tubular element of resilient material and the cylindrical housing 1.
While in the embodiment of FIG. 2 a continuous tubular element 2b of resilient material is provided, tubular elements 20 and 2d, respectively, are provided with holes at the ends thereof in the embodiments shown in FIGS. 3 and 4.
More precisely the tubular element 20 in FIG. 3 is formed with simple holes 10 at the ends thereof, while the tubular element 2d in FIG. 4 is provided with holes 1 1 having tabs 11a outwardly which act as single direction valves.
The operation in the embodiments shown in FIGS. 3, 4 and 5 is completely similar to that described above, one difference being that the tubular elements of resilient material are deformed to a larger extent, as clearly shown in the same Figures.
In the embodiment in FIG. 2 the pressure in the gap between the tubular element 212 and the cylindrical housing 1 is not controlled since this gap is tight-sealed.
In the embodiment in FIG. 3 the holes communicate the gap between the tubular element 2c and the cylindrical housing 1 with the relative work spaces defined by the piston 5. A fluid flow thus occurs throughout said holes 10.
In the embodiment in FIG. 4 such fluid passage is controlled by the single direction valves defined by the holes 11 and the relative tabs 11a.
The fluid can thus enter the gap through the holes 1 l, but cannot come out.
The presence of the fluid in the gap between the tubular elements of resilient material and the cylindrical housing 1, in the embodiments shown in FIGS. 3, 4 and 5 causes the tubular elements to keep suitably against the rim of the piston 5. The tubular elements of resilient material in all the above-mentioned embodiments are mounted with a slight tensioning lengthwise.
It should be appreciated that the fluid-operated cylinder according to the invention provides a regular and safe operation with a long useful life of the sealing between piston and cylindrical housing. Accuracy requirements in the geometrical and physical characteristics of the tube are also reduced, and thus the fluidoperated cylinder according to the invention may be manufactured at a lower cost relatively to the known types by making use of less costly material which may be machined with relatively large tolerances.
The structure according to the invention also permits a ready manufacturing of cylinders having a standart section and of any shape (square or another form) so that the overall dimensions of the parallepipedon being equal, the trust surface is greater and rotation is prevented at the same time.
Fu ermore the structure according to the invention pennits long stroke cylinder being readily manufactured.
Finally the cylinder according to the invention may be manufactured for particular applications only with the tubular element of resilient material, thus dispensing with the holding outer housing 1.
The invention thus conceived is susceptible to numerous modifications and changes all of which are included in the scope of the invention. The used materials as well as dimensions can be any according to the requirements and all elements can also be substituted by other technically equivalent means.
Iclaim:
1. A fluid operated cylinder including a cylindrical housing, a piston slidable therein and a sealing member between said piston and said cylindrical housing, said sealing member being in the fonn of a deformable liner of substantially elastomeric material, said liner defining a cylinder cavity and extending over a length at least equal to the piston stroke length and allowing slidable movement of the piston therein, the normal diameter of said deformable liner being normally less than the inner diameter of said cylindrical housing thereby forming a tubular interspace therebetween, an interspace fluid within said interspace and wherein, according to the improvement, said liner has at least one opening at least near the end of stroke position of the piston, said opening providing communication between said tubular interspace and said cylinder cavity, said interspace fluid being the same as the cylinder operating fluid contained within said cylinder cavity and said piston having a diameter greater than the normal diameter of said liner and such as to press the liner portion nearest to said piston against the cylinder walls so as to separate thereby said interspace in two portions.
Claims (1)
1. A fluid operated cylinder including a cylindrical housing, a piston slidable therein and a sealing member between said piston and said cylindrical housing, said sealing member being in the form of a deformable liner of substantially elastomeric material, said liner defining a cylinder cavity and extending over a length at least equal to the piston stroke length and allowing slidable movement of the piston therein, the normal diameter of said deformable liner being normally less than the inner diameter of said cylindrical housing thereby forming a tubular interspace therebetween, an interspace fluid within said interspace and wherein, according to the improvement, said liner has at least one opening at least near the end of stroke position of the piston, said opening providing communication between said tubular interspace and sAid cylinder cavity, said interspace fluid being the same as the cylinder operating fluid contained within said cylinder cavity and said piston having a diameter greater than the normal diameter of said liner and such as to press the liner portion nearest to said piston against the cylinder walls so as to separate thereby said interspace in two portions.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT2426969 | 1969-11-11 | ||
IT1149769 | 1969-12-10 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3696714A true US3696714A (en) | 1972-10-10 |
Family
ID=26326406
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US4181*[A Expired - Lifetime US3696714A (en) | 1969-11-11 | 1969-12-29 | Fluid-operated cylinder |
Country Status (12)
Country | Link |
---|---|
US (1) | US3696714A (en) |
JP (1) | JPS5023095B1 (en) |
AT (1) | AT295019B (en) |
CA (1) | CA937255A (en) |
CH (1) | CH519670A (en) |
DE (1) | DE2053330A1 (en) |
ES (1) | ES385789A1 (en) |
FR (1) | FR2068979A5 (en) |
GB (1) | GB1331277A (en) |
NL (1) | NL6918558A (en) |
SE (1) | SE365849B (en) |
SU (1) | SU499833A3 (en) |
Cited By (18)
Publication number | Priority date | Publication date | Assignee | Title |
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US4527395A (en) * | 1981-06-04 | 1985-07-09 | Allied Corporation | Master cylinder |
US4696223A (en) * | 1978-12-19 | 1987-09-29 | American Standard Inc. | Pneumatic pressure actuator |
US5147328A (en) * | 1989-06-02 | 1992-09-15 | Becton, Dickinson And Company | Syringe assembly |
US5181588A (en) * | 1991-05-06 | 1993-01-26 | Emmons J Bruce | Open framework disc brake caliper having an elastomeric cylinder liner |
US5249649A (en) * | 1991-06-03 | 1993-10-05 | Emmons J Bruce | Disc brake caliper of continuous hoop type |
WO1994015757A1 (en) * | 1993-01-18 | 1994-07-21 | Danfoss A/S | Process for mounting a cylinder sleeve in a base member, and a hydraulic machine |
US5899136A (en) * | 1996-12-18 | 1999-05-04 | Cummins Engine Company, Inc. | Low leakage plunger and barrel assembly for high pressure fluid system |
GB2340191A (en) * | 1998-03-02 | 2000-02-16 | Cummins Engine Co Inc | Low leakage plunger and barrel assembly for high pressure fluid system |
US20050166984A1 (en) * | 2002-04-30 | 2005-08-04 | Jan Verhaeghe | Fluid accumulator |
US20090126815A1 (en) * | 2007-11-08 | 2009-05-21 | Rajabi Bahram S | Lightweight high pressure repairable piston composite accumulator with slip flange |
US20150354608A1 (en) * | 2013-05-16 | 2015-12-10 | Festo Ag & Co., Kg | Drive Unit of a Fluid-Actuated Linear Drive and Method for its Manufacture |
CN107859669A (en) * | 2017-12-27 | 2018-03-30 | 宣城铁凝机械有限公司 | A kind of knife striking cylinder of high sealed |
CN108019397A (en) * | 2017-12-27 | 2018-05-11 | 宣城铁凝机械有限公司 | A kind of gas-liquid linked structure of high sealed |
CN108050127A (en) * | 2017-12-27 | 2018-05-18 | 宣城铁凝机械有限公司 | A kind of pneumatic cylinder of high sealed |
CN108050126A (en) * | 2017-12-27 | 2018-05-18 | 宣城铁凝机械有限公司 | A kind of gas-liquid linked structure of knife striking cylinder |
CN108087374A (en) * | 2017-12-27 | 2018-05-29 | 宣城铁凝机械有限公司 | A kind of gas-liquid linked structure of accurate positioning |
CN108087375A (en) * | 2017-12-27 | 2018-05-29 | 宣城铁凝机械有限公司 | A kind of knife striking cylinder of accurate positioning |
US10473076B2 (en) * | 2015-12-16 | 2019-11-12 | Delphi Technologies Ip Limited | High pressure pump with pump spring sealing sleeve |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2206335C3 (en) * | 1972-02-10 | 1981-09-17 | Binhack, Josef, Ing.(grad.), 7540 Neuenbürg | Hydraulic lifting or shifting device |
CH642145A5 (en) * | 1979-04-06 | 1984-03-30 | Hydrowatt Syst | METHOD AND DEVICE FOR DELIVERING LUBRICANTS TO A PISTON-CYLINDER ARRANGEMENT. |
JPS565546U (en) * | 1979-06-25 | 1981-01-19 | ||
US4363387A (en) * | 1979-11-13 | 1982-12-14 | The Bendix Corporation | Wheel cylinder and torque plate construction |
NL185173C (en) * | 1981-02-20 | 1990-02-01 | Noord Nederlandsche Maschf | HYDRAULIC DEVICE. |
DE3145494A1 (en) * | 1981-11-16 | 1983-05-26 | Wabco Westinghouse Fahrzeugbremsen GmbH, 3000 Hannover | Device for guiding the piston of a working cylinder |
JPS58177149U (en) * | 1982-05-21 | 1983-11-26 | 日産自動車株式会社 | protective mask for work |
DE19732934A1 (en) * | 1997-07-31 | 1999-02-04 | Mannesmann Rexroth Ag | Hydraulic cylinder in tie rod design, especially for small presses |
JP5464408B2 (en) * | 2009-05-18 | 2014-04-09 | Smc株式会社 | Fluid pressure cylinder |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1621858A (en) * | 1921-01-19 | 1927-03-22 | Sherwood Charles Frederic | Reciprocating pump |
DE848441C (en) * | 1948-11-30 | 1952-09-04 | Ernst Dr Schnabel | poetry |
US3084717A (en) * | 1957-08-28 | 1963-04-09 | Howard M Purcell | Piston type accumulator with flexible cylinder wall |
-
1969
- 1969-12-10 AT AT1149769A patent/AT295019B/en not_active IP Right Cessation
- 1969-12-10 NL NL6918558A patent/NL6918558A/xx unknown
- 1969-12-29 US US4181*[A patent/US3696714A/en not_active Expired - Lifetime
-
1970
- 1970-10-26 SE SE14437/70A patent/SE365849B/xx unknown
- 1970-10-27 CA CA096753A patent/CA937255A/en not_active Expired
- 1970-10-29 CH CH1602470A patent/CH519670A/en not_active IP Right Cessation
- 1970-10-30 DE DE19702053330 patent/DE2053330A1/en not_active Withdrawn
- 1970-11-04 FR FR7039623A patent/FR2068979A5/fr not_active Expired
- 1970-11-05 SU SU1487332A patent/SU499833A3/en active
- 1970-11-06 ES ES385789A patent/ES385789A1/en not_active Expired
- 1970-11-10 GB GB5346270A patent/GB1331277A/en not_active Expired
- 1970-11-10 JP JP45098360A patent/JPS5023095B1/ja active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1621858A (en) * | 1921-01-19 | 1927-03-22 | Sherwood Charles Frederic | Reciprocating pump |
DE848441C (en) * | 1948-11-30 | 1952-09-04 | Ernst Dr Schnabel | poetry |
US3084717A (en) * | 1957-08-28 | 1963-04-09 | Howard M Purcell | Piston type accumulator with flexible cylinder wall |
Cited By (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4696223A (en) * | 1978-12-19 | 1987-09-29 | American Standard Inc. | Pneumatic pressure actuator |
US4527395A (en) * | 1981-06-04 | 1985-07-09 | Allied Corporation | Master cylinder |
US5147328A (en) * | 1989-06-02 | 1992-09-15 | Becton, Dickinson And Company | Syringe assembly |
US5181588A (en) * | 1991-05-06 | 1993-01-26 | Emmons J Bruce | Open framework disc brake caliper having an elastomeric cylinder liner |
US5249649A (en) * | 1991-06-03 | 1993-10-05 | Emmons J Bruce | Disc brake caliper of continuous hoop type |
WO1994015757A1 (en) * | 1993-01-18 | 1994-07-21 | Danfoss A/S | Process for mounting a cylinder sleeve in a base member, and a hydraulic machine |
US5899136A (en) * | 1996-12-18 | 1999-05-04 | Cummins Engine Company, Inc. | Low leakage plunger and barrel assembly for high pressure fluid system |
WO1999045299A1 (en) * | 1996-12-18 | 1999-09-10 | Cummins Engine Company, Inc. | Low leakage plunger and barrel assembly for high pressure fluid system |
GB2340191A (en) * | 1998-03-02 | 2000-02-16 | Cummins Engine Co Inc | Low leakage plunger and barrel assembly for high pressure fluid system |
GB2340191B (en) * | 1998-03-02 | 2002-07-24 | Cummins Engine Co Inc | Low leakage plunger and barrel assembly for high pressure fluid system |
US20050166984A1 (en) * | 2002-04-30 | 2005-08-04 | Jan Verhaeghe | Fluid accumulator |
US7048009B2 (en) * | 2002-04-30 | 2006-05-23 | Groep Stevens International, Naamloze Vennootschap | Fluid accumulator |
US20090126815A1 (en) * | 2007-11-08 | 2009-05-21 | Rajabi Bahram S | Lightweight high pressure repairable piston composite accumulator with slip flange |
US8695643B2 (en) * | 2007-11-08 | 2014-04-15 | Parker-Hannifin Corporation | Lightweight high pressure repairable piston composite accumulator with slip flange |
US20150354608A1 (en) * | 2013-05-16 | 2015-12-10 | Festo Ag & Co., Kg | Drive Unit of a Fluid-Actuated Linear Drive and Method for its Manufacture |
US9995323B2 (en) * | 2013-05-16 | 2018-06-12 | Festo Ag & Co., Kg | Drive unit of a fluid-actuated linear drive and method for its manufacture |
US10473076B2 (en) * | 2015-12-16 | 2019-11-12 | Delphi Technologies Ip Limited | High pressure pump with pump spring sealing sleeve |
CN107859669A (en) * | 2017-12-27 | 2018-03-30 | 宣城铁凝机械有限公司 | A kind of knife striking cylinder of high sealed |
CN108019397A (en) * | 2017-12-27 | 2018-05-11 | 宣城铁凝机械有限公司 | A kind of gas-liquid linked structure of high sealed |
CN108050127A (en) * | 2017-12-27 | 2018-05-18 | 宣城铁凝机械有限公司 | A kind of pneumatic cylinder of high sealed |
CN108050126A (en) * | 2017-12-27 | 2018-05-18 | 宣城铁凝机械有限公司 | A kind of gas-liquid linked structure of knife striking cylinder |
CN108087374A (en) * | 2017-12-27 | 2018-05-29 | 宣城铁凝机械有限公司 | A kind of gas-liquid linked structure of accurate positioning |
CN108087375A (en) * | 2017-12-27 | 2018-05-29 | 宣城铁凝机械有限公司 | A kind of knife striking cylinder of accurate positioning |
Also Published As
Publication number | Publication date |
---|---|
JPS5023095B1 (en) | 1975-08-05 |
GB1331277A (en) | 1973-09-26 |
FR2068979A5 (en) | 1971-09-03 |
NL6918558A (en) | 1971-05-13 |
SE365849B (en) | 1974-04-01 |
SU499833A3 (en) | 1976-01-15 |
DE2053330A1 (en) | 1971-05-27 |
ES385789A1 (en) | 1974-06-01 |
CA937255A (en) | 1973-11-20 |
CH519670A (en) | 1972-02-29 |
AT295019B (en) | 1971-12-27 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: ETABLISSEMENT D OCCIDENT, VADUZ, LIECHTENSTEIN) PO Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:PANIGATI, PIER L.;REEL/FRAME:003923/0321 Effective date: 19811020 |