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About 9,779 papers for “Spring (device)”

Spring Device

National Cancer Institute · Definitions · 2020

Cited by 0Open access

Spring Loaded Camming Device

Jared S Christner, Kaitlin O Deherrera, Ryan W Edwards et al. · DigitalCommons - CalPoly (California State Polytechnic University) · 2020

Spring loaded camming devices or “cams” are used in traditional rock climbing as a means of active fall protection. Climbers place cams in cracks and fissures in the rock wall. The cam’s lobes press against the walls, locking it in place, anchoring the climber in case of a fall. Currently, there is a lack of large cams on the market. Only two small companies produce cams that are usable in cracks 6.5 inches wide and larger, however their designs are either too heavy and/or lack features to be comfortable. We are a group of mechanical engineering students at Cal Poly San Luis Obispo, and at the beginning of this project we aimed to design, manufacture, and test a large active fall protection device that improves on the currently available designs. Primarily, we wanted our design to be lightweight, strong, and have a semi-flexible stem. Due to the COVID-19 outbreak and campus closure in March 2020, we were forced to adapt and modify our goals to be achievable while we continued to work remotely. Since we did have access to Cal Poly facilities, we built a single camming device instead of the planned ten and were unable to tensile test the final cam. Even so, we feel that the testing results obtained from this prototype will be able to guide future iterations. The Final Design Report summarizes the background and market research we conducted, explains our objectives of the project, outlines and justifies the design concept, describes our final prototype and how we manufactured it, and details the formal testing procedure required to validate our calculations as well as provides recommendations for moving forward. We found that the prototype met all specifications but for the weight limit. It costs less than $130 per cam to manufacture, is usable in the targeted 6-9 inch range of rock crack widths, and has a flexible stem as requested by the climbing community. The final weight of the cam is 1135 g, which is a bit above our maximum desired weight of 900 g. We are confident that this design has the capability to take significant weight off the design with continued tensile testing.

Cited by 0Open access

A Spring‐Loaded Device

Dariush Ajami, Julius Rebek · 2010

This chapter contains sections titled: Notes After the Conference Acknowledgments References

Cited by 0

Spring Trip Foot Adjusting Device.

Thomas, Charles E. · The Portal to Texas History (University of North Texas) · 1911

Patent for a spring trip foot adjusting device for cultivators.

Cited by 0Open access

Device for Spring Dismount and for Spring Characteristics Measurement

Mazura, František · Brno University of Technology Digital Library (Brno University of Technology) · 2020

Předkládaná diplomová práce je zaměřena na konstrukční návrh zařízení pro demontáž pružiny z tlumiče odpružení a měření její charakteristiky, a dále zařízení pro měření pružinové charakteristiky stabilizátorů a torzních tyčí. Úvodní část práce popisuje základní rozdělení pružin a jejich vlastnosti a dále konstrukční varianty zavěšení kola. Další část seznamuje s na trhu již dostupnými zařízeními. Následující části se již věnují samotnému návrhu uvedených zařízení, tedy popisem jejich částí a funkce, definicí výstupních parametrů a napěťovo-deformační analýzou. Oba návrhy, včetně provedených analýz a výkresů sestavy, byly vytvořeny v softwaru Autodesk Inventor.

Cited by 0

Tightening Device For Spring Bed Bottoms.

Lottman, Albert C. · The Portal to Texas History (University of North Texas)

Patent for certain new and useful improvements in tightening devices for spring bed bottoms, including instructions and illustrations.

Cited by 0Open access

Experimental Tension Spring Stiffness Measuring Device

Šimon Berta, Vladimír Goga, Just́ın Muŕın et al. · 2023

In this paper, a novel mechatronic device is introduced for determining the stiffness constant of basic steel tension springs. The device incorporates two measurement principles: quasi-static and dynamic methods. Built on the Arduino Mega platform, the device is equipped with a touch-sensitive display for measurement control and visualization. An assessment of the performance and measurement precision of the system is conducted on a sample of steel tension springs.

Cited by 0

Balancing device

Van Dorsser, W.D., Herder, J.L., Wisse, B.M. et al. · Data Archiving and Networked Services (DANS) · 2007

The invention relates to a balancing device for a mass, comprising an arm that is adjustable about a pivoting point and with which the mass is coupled, and an adjustable spring system that is coupled with the arm, which spring system comprises at least one spring, wherein the spring system comprises an adjusting mechanism that is connected with the at least one spring, which adjusting mechanism is designed for adjusting the at least one spring so as to aid balancing the mass that is coupled with the arm, wherein a predetermined energy content of the spring system remains substantially the same

Cited by 0Open access

Balancing device

Van Dorsser, W.D. (author), Herder, J.L. (author), Wisse, B.M. (author) et al. · Research Repository (Delft University of Technology) · 2007

The invention relates to a balancing device for a mass, comprising an arm that is adjustable about a pivoting point and with which the mass is coupled, and an adjustable spring system that is coupled with the arm, which spring system comprises at least one spring, wherein the spring system comprises an adjusting mechanism that is connected with the at least one spring, which adjusting mechanism is designed for adjusting the at least one spring so as to aid balancing the mass that is coupled with the arm, wherein a predetermined energy content of the spring system remains substantially the same

Cited by 0Open access

A Spring-Loaded Constant Force Exercise Device

Matthew J. Chatham, Beth A. Todd, Joey K. Parker et al. · Advances in Bioengineering · 2001

Abstract Bone mineral density loss has been observed in astronauts who have spent a significant amount of time in a micro-gravity environment [1]. The lack of mechanical stress placed on the bones while in this environment is a major factor in the decrease in bone mineral density. To counteract these effects, resistive exercise has been the focus of many studies. Weighted plates have been used to provide a constant force resistance in ground-based bed rest studies. Bed rest has been established as one of the best ways to simulate the long-term effects of micro-gravity on earth [2]. In weightlessness, however, an alternate source of resistive force is required Some exercise devices provide resistance with elastic bands. Unfortunately, these elastic bands tend to lose their mechanical stiffness with use, requiring many spare elastic bands to be available for long duration missions in space. A more robust system that requires less maintenance would be preferable. Metallic helical springs meet this requirement The mechanical properties of helical springs are predictable, and these springs have a long life, making them well suited for long duration missions. However, helical springs exhibit linear behavior. That is, the resistive force provided by the spring is directly proportional to the amount of deflection. Therefore, a mechanism was designed to interact with the linear springs to provide a constant output force over a given length of travel.

Cited by 0

Churning Device.

Wood, Sylvanus B., Wood, Hervey, Wiley, Thomas Wilson · The Portal to Texas History (University of North Texas)

Patent for a new and improved churn. This design consists "[i]n a churning device, the combination, with a base and a spring-bar held therein, of a cross-bar hinged to the said base and a churn-carrying bar secured to the said hinged and spring-bars" (lines 69-73).

Cited by 0Open access

Spring-loaded device for eliciting deep tendon reflexes

Hong, Kevin Chao · Digital Commons - University of South Florida (University of South Florida) · 2024

A deep tendon reflex-eliciting device actuated by pressure against a patient's skin, which releases a spring-loaded mass that delivers an impulse through a fully-enclosed housing. This device includes a weight contained within the casings, and a mainspring in communication with the weight. The mainspring has a bias toward expansion. In the compressed position, the mainspring is also compressed, and the weight is pushed backwards into the rear casing. The weight is released to be driven forward by the mainspring. The weight strikes the inside of the forward casing, delivering an impulse to a surface against which the device is pressed. A reset spring can push apart the forward and rear casings to reset the device to its expanded position. A case screw is also included which is able to consistently set the impact force of the device.

Cited by 0

Power generation device based on spring oscillator system

Wenchao Xue, Zhiming Liu, Xingyu Mu et al. · IEICE Electronics Express · 2024

The application of magnetorheological equipment and its sensors in high-speed trains is restricted to a certain extent due to the demand for external power supply. Usually, there are different degrees of vibration in the operation of high-speed trains. If the vibration energy is converted into electric energy, it will be beneficial to the wide application of magnetorheological equipment in high-speed trains. In this paper, based on the load characteristics of the anti-yaw damper in high-speed trains, a ring-iron resonant power generation device based on the spring oscillator system is designed by using the amplification effect of the spring oscillator system on the amplitude. In this paper, a vibration test was carried out by an experimental prototype and two control prototypes, and the power generation capacity of the device was verified. The test results show that the maximum power generation of the device designed in this paper is 20.18 watts, which is 98% higher than that of the control group. The average power generation in random vibration is 6 watts, which can meet the power supply demand of magnetorheological damping equipment in high-speed trains.

Cited by 0Open access

Study on Remote Haptic Device Using Coil Spring

Shunsuke Nakamura, Kazushi Yoshida, Yu NAKAMICHI · The Proceedings of Mechanical Engineering Congress Japan · 2023

We have developed a pair of interactive devices for remote haptic detection and presentation using linear coil springs. Previously, we found that coil springs with a small spring constant provide accurate haptic reproduction but cannot reproduce large forces, and those with a large spring constant can reproduce large forces but shows inaccurate haptic reproduction. In this study, we proposed the use of conical springs to improve haptic reproduction since we hypothesized that the non-linear characteristics between deformation and the restoring force of the conical spring take advantage of linear coil springs with small and large spring constants. In the experiment, we applied loads to one of the devices and measured forces reproduced by another device to evaluate haptic reproduction. The result showed that the conical spring provided accurate haptic reproduction in a wider force range than the coil springs. Therefore, we concluded that nonlinear springs are suitable to improve haptic reproduction.

Cited by 0Open access