US20060270526A1 - Structure for a stepper - Google Patents
Structure for a stepper Download PDFInfo
- Publication number
- US20060270526A1 US20060270526A1 US11/168,085 US16808505A US2006270526A1 US 20060270526 A1 US20060270526 A1 US 20060270526A1 US 16808505 A US16808505 A US 16808505A US 2006270526 A1 US2006270526 A1 US 2006270526A1
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- US
- United States
- Prior art keywords
- improved structure
- stepper
- piston
- stepper according
- outer cylinder
- 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.)
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Classifications
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B21/00—Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices
- A63B21/008—Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices using hydraulic or pneumatic force-resisters
- A63B21/0083—Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices using hydraulic or pneumatic force-resisters of the piston-cylinder type
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B22/00—Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements
- A63B22/0048—Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements with cantilevered support elements pivoting about an axis
- A63B22/0056—Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements with cantilevered support elements pivoting about an axis the pivoting movement being in a vertical plane, e.g. steppers with a horizontal axis
Definitions
- the present invention relates to an improved structure for a stepper, wherein an inertial gas is filled into a hydraulic cylinder; once the compression force acting on the inertial gas is released, the inertial gas will expand, and a restoring force will be obtained; the restoring force can replace the conventional elastic elements.
- the present invention is free from the problem of elastic fatigue and can simplify the fabrication process and reduce the fabrication cost.
- the conventional restoring linkage structure comprises: a rod 21 , an inner sleeve 22 , an outer sleeve 23 , a linkage level 25 , an elastic element 26 , and a nut 27 .
- the rod 21 has one threaded end 210 for screwing joint. The other end of the rod 21 is inserted into the outer sleeve 23 and functions like a piston.
- One end of the outer sleeve 23 has a long slot 230 .
- Two pivot lugs 232 projects vertically from both edges of the slot 230 near one end thereof.
- a pivot lug 234 projects vertically from the other end of the outer sleeve 23 and aligns in a straight line with the slot 230 .
- a screw 240 is inserted into the pivot lugs 232 of the outer sleeve 23 in order to cooperate with the knob 24 to adjust the spacing of the slot 230 of the outer sleeve 23 .
- the inner sleeve 22 has a longitudinal slot and a flange 220 at one end thereof.
- the linkage level 25 is a long rod having holes at its two ends.
- the elastic element 26 may be a spring.
- the nut 27 is used to compress the elastic element 26 for increasing the damping effect.
- the restoring linking structure is installed in a conventional stepper.
- the conventional stepper comprises: a seat 10 , two restoring linkage structures 20 , a linking mechanism 30 , and two pedals 33 , 34 .
- a connecting beam 12 is used to connect a primary beam 11 and a rear beam 13 .
- Two restoring linkage structures 20 are parallel disposed at both sides of the seat 10 .
- Two pedals 33 , 34 are pivotedly installed at both sides of the primary beam 11 .
- the linking mechanism 30 is composed of a pulley 31 and a bull rope 32 .
- the pulley 31 is installed below the connecting beam 12 and at the middle portion of the primary beam 11 .
- the bull rope 32 wraps over the pulley 31 , and both ends connect with two pedals 33 , 34 .
- Two rods 21 are parallel spanned between the primary beam 11 and the rear beam 13 , and the non-threaded ends of the rods 21 are fixedly joined with the primary beam 11 , and the threaded ends of the rods 21 are fixedly joined with the rear beam 13 .
- the inner sleeve 22 sleeves the non-threaded side of the rod 21
- the outer sleeve 23 sleeves the inner sleeve 22 .
- the slotted end of the outer sleeve 23 is disposed near the primary beam 11 and pressed against the flange 220 of the inner sleeve 22 .
- the elastic element 26 sleeves the rod 21 , and one end of the elastic element 26 is pressed against the end having the pivot lug 234 of the outer sleeve 23 , and the nut 27 is screwed into the threaded end of the rod 21 and pressed against the other end of the elastic element 26 .
- One end of the linkage level 25 is pivotedly installed to the pivot lug 234 of the outer sleeve 23 , and the other end of the linkage level 25 is pivotedly installed to the bottom of the pedal 33 , or 34 .
- a conventional hydraulic cylinder which has a piston moving back and forth thereinside, can convert fluidic energy into a linear mechanical motion, and the movement of the piston can be precisely controlled within the travel of the piston.
- the conventional hydraulic cylinder needs a spring to restore it to the original state.
- a damper is usually needed to reduce the free oscillation of the bouncing-back spring.
- a damper utilizes a high-viscosity fluid and a small aperture to create the damping effect, and this principle is also to be adopted by the present invention to provide an improved structure for a stepper.
- the conventional linkage structure with restoring effect usually adopts spring elements. Different pivots' spans or different piston travels need different springs, which is a cost burden for the manufacturer. After having been in service for a period of time, the spring could have elastic fatigue or could be corroded. Further, when using a conventional stepper, the user could be clamped and hurt by the spring.
- the primary objective of the present invention is to provide an improved structure for a stepper, wherein an inertial gas together with hydraulic oil is filled into the hydraulic cylinder of a stepper, and when the force acting on the piston rod is released, a restoring force can be obtained from the expanding inertial gas in order to replace the conventional elastic elements and to enable the manufacturer to be free from preparing many kinds of springs, so that the fabrication process can be simplified and the fabrication cost can be reduced.
- Another objective of the present invention is to provide an improved structure for a stepper, wherein an inertial gas free from elastic fatigue and corrosion is used to replace the conventional elastic elements, and wherein the inertial gas can be nitrogen, which is the most abundant gas in the atmosphere and is colorless, odorless and very stable and can be obtained just via utilizing nitrogen-making machine to compress the air, in order to overcome the problems of elastic fatigue and corrosion in the conventional springs and to achieve an environment-protection efficacy.
- Another objective of the present invention is to provide an improved structure for a stepper, wherein the inertial gas, which together with hydraulic oil is filled into the hydraulic cylinder, can function as a restoring and a damping devices, which are different from the conventional springs and dampers, in order to provide a more easy and comfortable performance for the user.
- FIG. 1 is an exploded view of a conventional restoring linkage structure.
- FIG. 2 is a perspective view of a conventional stepper with the conventional restoring linkage structure.
- FIG. 3 is a side view of a conventional stepper with the conventional restoring linkage structure.
- FIG. 4 is an exploded view of the improved structure for a stepper according to the present invention.
- FIG. 5 is a first diagram showing schematically the operation of the improved structure for a stepper according to the present invention.
- FIG. 6 is a second diagram showing schematically the operation of the improved structure for a stepper according to the present invention.
- FIG. 7 is a perspective view of the improved structure for a stepper according to the present invention.
- FIG. 8 is a first diagram showing one embodiment of the improved structure for a stepper according to the present invention.
- FIG. 9 is a second diagram showing one embodiment of the improved structure for a stepper according to the present invention.
- the hydraulic cylinder 50 comprises: an outer cylinder 51 , an inner cylinder 52 , and a piston assembly.
- the outer cylinder 51 is a hollow sleeve and has a diameter larger than that of the inner cylinder 52 .
- the top end of the outer cylinder 51 has a bearing 511 having a through hole at its center, and the bearing 511 has an annular groove 512 to fix the inner cylinder 52 .
- the bottom end of the outer cylinder 51 has a fixedly-installed connecting element 59 .
- a joint seat 56 is disposed above the connecting element 59 and inside the outer cylinder 51 .
- An inflation tip 57 is installed at the center of the joint seat 56 to fill the inertial gas.
- An O-ring 571 is installed between the joint seat 56 and the inflation tip 57 to avoid the leakage of the inertial gas.
- a seat 55 is fixedly installed to one end of the inner cylinder 52 . Multiple notches 552 are formed on a convex rim 553 of the seat 55 .
- the seat 55 has multiple holes 551 to let the hydraulic oil flow through.
- An oil-regulating wafer 554 is installed below the seat 55 to avoid too high a flow rate at which the hydraulic oil flows into the space between the outer cylinder 51 and the inner cylinder 52 .
- Both the seat 55 and the oil-regulating wafer 554 have central holes, and a movable tip 555 penetrates those two central holes to press the oil-regulating wafer 554 to the seat 55 ; the movable tip 555 can float slightly.
- the piston assembly comprises a piston rod 53 and a piston 54 .
- One end of the piston rod 53 has a threaded stub 531 .
- the threaded end of the piston rod 53 penetrates the central hole of the bearing 511 at the top end of the outer cylinder 51 , and a connecting element 58 is screwed fixedly to the threaded stub 531 .
- the piston 54 is locked fixedly to another end of the piston rod 53 .
- the piston 54 comprises multiple gaskets 541 and O-rings 542 .
- the piston 54 and its appendixes are locked fixedly to the piston rod 53 with a nut 543 .
- the dimensions of the piston 54 and its appendixes should enable them to fit into the inner cylinder
- FIG. 5 a first diagram showing schematically the operation of the improved structure for a stepper of the present invention.
- the piston 54 is locked fixedly to the piston rod 53 with the nut 543 .
- the other end of the piston rod 543 penetrates through the central hole of the bearing 511 to reach the exterior of the outer cylinder 51 , and then is screwed fixedly to the connecting element 58 .
- the dimension of the piston structure enables it to fit into the inner cylinder 52 and to move back and forth inside the internal cylinder 52 .
- the seat 55 of the inner cylinder 52 exactly fronts against the joint seat 56 , and the other end of the inner cylinder 52 is firmly engaged to the annular groove 512 of the bearing 511 , wherein the diameter of the annular groove 512 equals that of the inner cylinder 52 .
- the seat 55 of the inner cylinder 52 firmly contacts the joint seat 56 , but the movable tip 555 can move or float slightly inside the central holes of the oil-regulating wafer 554 and the seat 55 . At this moment, the movable tip 555 does not push the oil-regulating wafer 554 to tightly contact the seat 55 ; therefore the oil-regulating wafer 554 will not retard the flow of the hydraulic oil.
- FIG. 6 a second diagram showing schematically the operation of the improved structure for a stepper of the present invention.
- the inertial gas can be maintained to float over the hydraulic oil.
- the inertial gas is compressed by the piston 54 , the volume of the inertial gas shrinks, and the pressure of the inertial gas rises.
- the force acting on the piston 54 is released, the pressure of the inertial gas tends to expand its volume and to drive the piston back to the original position; thus, a restoring force can be obtained from the compressed inertial gas, and the inertial gas can replace the conventional elastic elements.
- FIG. 7 a perspective view of the improved structure for a stepper of the present invention.
- the outer cylinder 51 can be seamlessly engaged with the bearing 511 and the joint seat 56 by using O-rings or roll welding in order to avoid the leakage of the hydraulic oil.
- the present invention can replace the convention elastic elements and can be free from elastic fatigue, corrosion, and clamping-hurt. Besides, the appearance of the present invention is free from externally-disposed elastic elements, which can further improve the appearance of the stepper.
Abstract
The present invention discloses an improved structure for a stepper, particularly a stepper having a restoring device, wherein an inertial gas together with hydraulic oil is filled into the hydraulic cylinder of a stepper. As the outer shell of the atom of the inertial gas is saturated with electrons, the inertial gas will be very stable in the hydraulic cylinder. When a force is applied to the piston rod of the stepper, the piston will be pushed forward to compress the inertial gas and the hydraulic oil. When the force acting on the piston is released, the inertial gas will expand, which will create a restoring force to push the piston back to the original position.
Description
- 1. Field of the Invention
- The present invention relates to an improved structure for a stepper, wherein an inertial gas is filled into a hydraulic cylinder; once the compression force acting on the inertial gas is released, the inertial gas will expand, and a restoring force will be obtained; the restoring force can replace the conventional elastic elements. The present invention is free from the problem of elastic fatigue and can simplify the fabrication process and reduce the fabrication cost.
- 2. Description of the Related Art
- Refer to
FIG. 1 . The conventional restoring linkage structure comprises: arod 21, aninner sleeve 22, anouter sleeve 23, alinkage level 25, anelastic element 26, and anut 27. Therod 21 has one threadedend 210 for screwing joint. The other end of therod 21 is inserted into theouter sleeve 23 and functions like a piston. One end of theouter sleeve 23 has along slot 230. Two pivot lugs 232 projects vertically from both edges of theslot 230 near one end thereof. Apivot lug 234 projects vertically from the other end of theouter sleeve 23 and aligns in a straight line with theslot 230. Ascrew 240 is inserted into the pivot lugs 232 of theouter sleeve 23 in order to cooperate with theknob 24 to adjust the spacing of theslot 230 of theouter sleeve 23. Theinner sleeve 22 has a longitudinal slot and aflange 220 at one end thereof. Thelinkage level 25 is a long rod having holes at its two ends. Theelastic element 26 may be a spring. Thenut 27 is used to compress theelastic element 26 for increasing the damping effect. - Refer to
FIG. 2 andFIG. 3 . The restoring linking structure is installed in a conventional stepper. The conventional stepper comprises: aseat 10, two restoringlinkage structures 20, a linkingmechanism 30, and twopedals seat 10, a connectingbeam 12 is used to connect aprimary beam 11 and arear beam 13. Two restoringlinkage structures 20 are parallel disposed at both sides of theseat 10. Twopedals primary beam 11. The linkingmechanism 30 is composed of apulley 31 and abull rope 32. Thepulley 31 is installed below the connectingbeam 12 and at the middle portion of theprimary beam 11. Thebull rope 32 wraps over thepulley 31, and both ends connect with twopedals - Refer to
FIG. 1 ,FIG. 2 andFIG. 3 . Tworods 21 are parallel spanned between theprimary beam 11 and therear beam 13, and the non-threaded ends of therods 21 are fixedly joined with theprimary beam 11, and the threaded ends of therods 21 are fixedly joined with therear beam 13. Theinner sleeve 22 sleeves the non-threaded side of therod 21, and theouter sleeve 23 sleeves theinner sleeve 22. The slotted end of theouter sleeve 23 is disposed near theprimary beam 11 and pressed against theflange 220 of theinner sleeve 22. Theelastic element 26 sleeves therod 21, and one end of theelastic element 26 is pressed against the end having thepivot lug 234 of theouter sleeve 23, and thenut 27 is screwed into the threaded end of therod 21 and pressed against the other end of theelastic element 26. One end of thelinkage level 25 is pivotedly installed to thepivot lug 234 of theouter sleeve 23, and the other end of thelinkage level 25 is pivotedly installed to the bottom of thepedal - However, the conventional restoring linkage structure has the following disadvantages:
-
- 1. The energy is stored in the elastic element via pre-compressing the elastic element. The elastic force depends on the compressing travel, i.e. the length of the rod, which not only occupies space but also raise the fabrication cost.
- 2. After a period of service time, the elastic element, such as a spring or a rubber, would has elastic fatigue.
- 3. As the elastic element is installed outside, air, sunlight, and humidity will bring about deterioration, or corrosion to the elastic element.
- 4. The externally-disposed elastic element could probably clamp and hurt the user.
- With the persistent spirit for creation, and based on many years' experience and acquaintance in this art, the inventor has endeavored to research and study the problems mentioned above and proposes an improved structure for a stepper in order to overcome the problems.
- A conventional hydraulic cylinder, which has a piston moving back and forth thereinside, can convert fluidic energy into a linear mechanical motion, and the movement of the piston can be precisely controlled within the travel of the piston. When the force acting on the piston rod is released, the conventional hydraulic cylinder needs a spring to restore it to the original state. However, a damper is usually needed to reduce the free oscillation of the bouncing-back spring. A damper utilizes a high-viscosity fluid and a small aperture to create the damping effect, and this principle is also to be adopted by the present invention to provide an improved structure for a stepper.
- The conventional linkage structure with restoring effect usually adopts spring elements. Different pivots' spans or different piston travels need different springs, which is a cost burden for the manufacturer. After having been in service for a period of time, the spring could have elastic fatigue or could be corroded. Further, when using a conventional stepper, the user could be clamped and hurt by the spring.
- The primary objective of the present invention is to provide an improved structure for a stepper, wherein an inertial gas together with hydraulic oil is filled into the hydraulic cylinder of a stepper, and when the force acting on the piston rod is released, a restoring force can be obtained from the expanding inertial gas in order to replace the conventional elastic elements and to enable the manufacturer to be free from preparing many kinds of springs, so that the fabrication process can be simplified and the fabrication cost can be reduced.
- Another objective of the present invention is to provide an improved structure for a stepper, wherein an inertial gas free from elastic fatigue and corrosion is used to replace the conventional elastic elements, and wherein the inertial gas can be nitrogen, which is the most abundant gas in the atmosphere and is colorless, odorless and very stable and can be obtained just via utilizing nitrogen-making machine to compress the air, in order to overcome the problems of elastic fatigue and corrosion in the conventional springs and to achieve an environment-protection efficacy.
- Further another objective of the present invention is to provide an improved structure for a stepper, wherein the inertial gas, which together with hydraulic oil is filled into the hydraulic cylinder, can function as a restoring and a damping devices, which are different from the conventional springs and dampers, in order to provide a more easy and comfortable performance for the user.
-
FIG. 1 is an exploded view of a conventional restoring linkage structure. -
FIG. 2 is a perspective view of a conventional stepper with the conventional restoring linkage structure. -
FIG. 3 is a side view of a conventional stepper with the conventional restoring linkage structure. -
FIG. 4 is an exploded view of the improved structure for a stepper according to the present invention. -
FIG. 5 is a first diagram showing schematically the operation of the improved structure for a stepper according to the present invention. -
FIG. 6 is a second diagram showing schematically the operation of the improved structure for a stepper according to the present invention. -
FIG. 7 is a perspective view of the improved structure for a stepper according to the present invention. -
FIG. 8 is a first diagram showing one embodiment of the improved structure for a stepper according to the present invention. -
FIG. 9 is a second diagram showing one embodiment of the improved structure for a stepper according to the present invention. - To enable the objectives, technical contents and accomplishments of the present invention to be more easily understood, the preferred embodiments of the present invention are to be described below in detail in cooperation with the attached drawings.
- Refer to
FIG. 4 an exploded view of the improved structure for a stepper of the present invention. Thehydraulic cylinder 50 comprises: anouter cylinder 51, aninner cylinder 52, and a piston assembly. Theouter cylinder 51 is a hollow sleeve and has a diameter larger than that of theinner cylinder 52. The top end of theouter cylinder 51 has abearing 511 having a through hole at its center, and thebearing 511 has anannular groove 512 to fix theinner cylinder 52. The bottom end of theouter cylinder 51 has a fixedly-installed connectingelement 59. Ajoint seat 56 is disposed above the connectingelement 59 and inside theouter cylinder 51. Aninflation tip 57 is installed at the center of thejoint seat 56 to fill the inertial gas. An O-ring 571 is installed between thejoint seat 56 and theinflation tip 57 to avoid the leakage of the inertial gas. Aseat 55 is fixedly installed to one end of theinner cylinder 52.Multiple notches 552 are formed on aconvex rim 553 of theseat 55. Theseat 55 hasmultiple holes 551 to let the hydraulic oil flow through. An oil-regulatingwafer 554 is installed below theseat 55 to avoid too high a flow rate at which the hydraulic oil flows into the space between theouter cylinder 51 and theinner cylinder 52. Both theseat 55 and the oil-regulatingwafer 554 have central holes, and amovable tip 555 penetrates those two central holes to press the oil-regulatingwafer 554 to theseat 55; themovable tip 555 can float slightly. The piston assembly comprises apiston rod 53 and apiston 54. One end of thepiston rod 53 has a threadedstub 531. The threaded end of thepiston rod 53 penetrates the central hole of thebearing 511 at the top end of theouter cylinder 51, and a connectingelement 58 is screwed fixedly to the threadedstub 531. Thepiston 54 is locked fixedly to another end of thepiston rod 53. Thepiston 54 comprisesmultiple gaskets 541 and O-rings 542. Thepiston 54 and its appendixes are locked fixedly to thepiston rod 53 with anut 543. The dimensions of thepiston 54 and its appendixes should enable them to fit into theinner cylinder 52. - Refer to
FIG. 5 a first diagram showing schematically the operation of the improved structure for a stepper of the present invention. For the piston structure, thepiston 54 is locked fixedly to thepiston rod 53 with thenut 543. The other end of thepiston rod 543 penetrates through the central hole of thebearing 511 to reach the exterior of theouter cylinder 51, and then is screwed fixedly to the connectingelement 58. The dimension of the piston structure enables it to fit into theinner cylinder 52 and to move back and forth inside theinternal cylinder 52. Theseat 55 of theinner cylinder 52 exactly fronts against thejoint seat 56, and the other end of theinner cylinder 52 is firmly engaged to theannular groove 512 of thebearing 511, wherein the diameter of theannular groove 512 equals that of theinner cylinder 52. When theinner cylinder 51 is assembled into theouter cylinder 51, theseat 55 of theinner cylinder 52 firmly contacts thejoint seat 56, but themovable tip 555 can move or float slightly inside the central holes of the oil-regulatingwafer 554 and theseat 55. At this moment, themovable tip 555 does not push the oil-regulatingwafer 554 to tightly contact theseat 55; therefore the oil-regulatingwafer 554 will not retard the flow of the hydraulic oil. Refer toFIG. 6 a second diagram showing schematically the operation of the improved structure for a stepper of the present invention. When a force is applied to push forward thepiston 54 inside the tiltinghydraulic cylinder 50, the inertial gas and the hydraulic oil are also pushed forward by thepiston 54, and the inertial gas floats over the hydraulic oil. The force acting on thepiston 54 compresses the inertial gas and enables the pressure inside the inner cylinder to rise, and themovable tip 555 of theseat 55 is also pushed forward to enable the oil-regulatingwafer 554 to contact theseat 55. At this moment, the hydraulic oil will flow through theholes 551 and thenotches 552 into theouter cylinder 51. As the oil-regulatingwafer 554 can regulate the flow rate of the hydraulic oil, the inertial gas can be maintained to float over the hydraulic oil. At this moment, as the inertial gas is compressed by thepiston 54, the volume of the inertial gas shrinks, and the pressure of the inertial gas rises. When the force acting on thepiston 54 is released, the pressure of the inertial gas tends to expand its volume and to drive the piston back to the original position; thus, a restoring force can be obtained from the compressed inertial gas, and the inertial gas can replace the conventional elastic elements. At this moment, themovable tip 555 is loosened, and the oil-regulatingwafer 554 will nor more tight contact theseat 55; thus, the hydraulic oil inside the space between theouter cylinder 51 and theinner cylinder 52 can flow back to theinner cylinder 52 through theholes 551 and thenotches 552. - Refer to
FIG. 7 a perspective view of the improved structure for a stepper of the present invention. Theouter cylinder 51 can be seamlessly engaged with thebearing 511 and thejoint seat 56 by using O-rings or roll welding in order to avoid the leakage of the hydraulic oil. - Refer to
FIG. 8 andFIG. 9 showing the embodiments of the improved structure for a stepper of the present invention. The present invention can replace the convention elastic elements and can be free from elastic fatigue, corrosion, and clamping-hurt. Besides, the appearance of the present invention is free from externally-disposed elastic elements, which can further improve the appearance of the stepper. - The embodiments described above are to clarify the present invention to enable the persons skilled in the art to understand, make and use the present invention but not intended to limit the scope of the present invention. Any equivalent modification and variation without departing from the spirit of the present invention is to be included within the scope of the claims of the present invention appended below.
Claims (17)
1. An improved structure for a stepper, comprising:
an outer cylinder;
an inner cylinder, installed inside said outer cylinder;
a piston assembly, further comprising a piston and a piston rod, and installed inside said inner cylinder, wherein said piston further comprises gaskets, O-rings, and a nut, and said piston is installed on the internal end of said piston rod;
a seat, installed on one end of said inner cylinder;
a bearing, installed inside said outer cylinder, and engaged with the other end of said inner cylinder;
a joint seat, installed inside said outer cylinder, firmly contacting said seat installed on one end of said inner cylinder; and
connecting elements, separately installed to the external end of said outer cylinder and the external end of said piston rod; and
characterized in that a stable gas together with hydraulic oil is filled into the hydraulic cylinder to create a restoring force while the force acting on said piston is released.
2. The improved structure for a stepper according to claim 1 , wherein said stable gas is an inertial gas.
3. The improved structure for a stepper according to claim 2 , wherein said inertial gas is nitrogen.
4. The improved structure for a stepper according to claim 2 , wherein said inertial gas is helium.
5. The improved structure for a stepper according to claim 1 , wherein said hydraulic oil is a machine oil.
6. The improved structure for a stepper according to claim 5 , wherein said hydraulic oil is a mineral-oil based one.
7. The improved structure for a stepper according to claim 5 , wherein said hydraulic oil is a synthetic oil.
8. The improved structure for a stepper according to claim 1 , wherein multiple notches are formed on said seat.
9. The improved structure for a stepper according to claim 8 , wherein multiple holes are formed on said seat.
10. The improved structure for a stepper according to claim 1 , wherein said bearing and said joint seat are fixedly installed to said outer cylinder in cooperation with O-rings.
11. The improved structure for a stepper according to claim 10 , wherein said bearing and said joint seat are fixedly installed to said outer cylinder by roll welding.
12. The improved structure for a stepper according to claim 1 , wherein said connecting elements have holes.
13. The improved structure for a stepper according to claim 1 , wherein said outer cylinder and said inner cylinder are cast in carbon steel.
14. The improved structure for a stepper according to claim 7 , wherein said outer cylinder and said inner cylinder are cast in an aluminum alloy.
15. The improved structure for a stepper according to claim 1 , wherein said piston rod is chromium-plated.
16. The improved structure for a stepper according to claim 1 , wherein said gasket is made of Teflon.
17. The improved structure for a stepper according to claim 1 , wherein said O-ring is made of rubber.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW094208563U TWM285363U (en) | 2005-05-25 | 2005-05-25 | Improvement of steps machine structure |
TW094208563 | 2005-05-25 |
Publications (1)
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US20060270526A1 true US20060270526A1 (en) | 2006-11-30 |
Family
ID=37399140
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US11/168,085 Abandoned US20060270526A1 (en) | 2005-05-25 | 2005-06-27 | Structure for a stepper |
Country Status (2)
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US (1) | US20060270526A1 (en) |
TW (1) | TWM285363U (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
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US20080146421A1 (en) * | 2006-12-19 | 2008-06-19 | Lifegear, Inc. | Exercise apparatus |
US7771327B1 (en) * | 2009-04-02 | 2010-08-10 | Terry Reams | Exercise device with footboards having tubular support |
US20110046524A1 (en) * | 2008-04-18 | 2011-02-24 | Izumi Mihara | Passive exercise apparatus |
US20120108397A1 (en) * | 2010-11-02 | 2012-05-03 | Jao-Hsing Tsai | Leg Stretching Device |
WO2013086784A1 (en) * | 2011-12-12 | 2013-06-20 | 应超杰 | Foot-operated dance exercise machine |
CN103511399A (en) * | 2013-10-11 | 2014-01-15 | 浙江正星健身器有限公司 | Fatigue tester of treadmill oil cylinder |
US20160271439A1 (en) * | 2015-03-20 | 2016-09-22 | Lung-Fei Chuang | Stepper |
US9474930B2 (en) * | 2014-10-18 | 2016-10-25 | Gee Hoo Fitec Corp. | Stepping training machine |
US20170007874A1 (en) * | 2015-07-07 | 2017-01-12 | Wei-Teh Ho | Torsion based exerciser |
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US5263559A (en) * | 1989-09-23 | 1993-11-23 | Robert Bosch Gmbh | Damping system for a shock absorber having a one-way check valve |
US5441132A (en) * | 1992-09-10 | 1995-08-15 | Fichtel & Sachs Ag | Double tube vibration damper unit |
US5509514A (en) * | 1995-04-14 | 1996-04-23 | General Motors Corporation | Gas charging of suspension damper |
US6619445B2 (en) * | 2001-01-12 | 2003-09-16 | Zf Sachs Ag | Telescopic vibration damper |
US7413064B2 (en) * | 2004-08-27 | 2008-08-19 | Kayaba Industry Co., Ltd. | Front fork |
Cited By (11)
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US20080146421A1 (en) * | 2006-12-19 | 2008-06-19 | Lifegear, Inc. | Exercise apparatus |
US20110046524A1 (en) * | 2008-04-18 | 2011-02-24 | Izumi Mihara | Passive exercise apparatus |
US7771327B1 (en) * | 2009-04-02 | 2010-08-10 | Terry Reams | Exercise device with footboards having tubular support |
US20120108397A1 (en) * | 2010-11-02 | 2012-05-03 | Jao-Hsing Tsai | Leg Stretching Device |
WO2013086784A1 (en) * | 2011-12-12 | 2013-06-20 | 应超杰 | Foot-operated dance exercise machine |
CN103511399A (en) * | 2013-10-11 | 2014-01-15 | 浙江正星健身器有限公司 | Fatigue tester of treadmill oil cylinder |
US9474930B2 (en) * | 2014-10-18 | 2016-10-25 | Gee Hoo Fitec Corp. | Stepping training machine |
US20160271439A1 (en) * | 2015-03-20 | 2016-09-22 | Lung-Fei Chuang | Stepper |
US9737753B2 (en) * | 2015-03-20 | 2017-08-22 | Lung-Fei Chuang | Stepper |
US20170007874A1 (en) * | 2015-07-07 | 2017-01-12 | Wei-Teh Ho | Torsion based exerciser |
US9776031B2 (en) * | 2015-07-07 | 2017-10-03 | Wei-Teh Ho | Torsion based exerciser |
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