Instructions:
Complete the following form for each artifact that validates your problem statement.Source (APA format):
Source (APA format):
Keizo, S., Masashi, N., & Co, S. I. (n.d.). Device for tensioning the driving chain in a bicycle equipped with coaster brake and exposed speed change gear. Retrieved September 07, 2016, from https://patents.google.com/patent/US3402942A/en?surl=1
Artifact Summary:
Device for tensioning the upper run of the driving chain of a bicycle equipped with built-in coaster brake adapted to be applied by rotating the front sprocket in the reverse direction
Artifact Critique:
This patent helps keep the chain tight enough as to be less likely to fall off of its sprockets. It is a very large solution and requires an extra step in the pedaling process for the device to work properly and tighten the chain.
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Source (APA format):
Bytzek, K. K., Komorowski, J. S., Inc, L. A., LITENS AUTOMOTIVE INC., 355 WILDCAT ROAD DOWNSVIEW ONTARIO CANADA A CORP OF CANADA, LITENS AUTOMOTIVE INC., A CORP OF CANADA, LITENS AUTOMOTIVE PARTNERSHIP, ONTARIO, CANADA A PARTNERSIP OF CANADA, & Partnership, L. A. (n.d.). Timing belt tensioner with damped constant spring tensioning and belt tooth disegagement prevention. Retrieved September 07, 2016, from https://patents.google.com/patent/US4583962A/en?surl=1
Artifact Summary:
A timing belt tensioning device comprising a fixed structure having a spring pressed pivoted structure mounted thereon for pivotal movement about a first axis between first and second limiting positions. The pivoted structure carries a timing belt engaging pulley for rotational movement about a second axis parallel with the first axis.
Artifact Critique:
His patent could present potential solutions for our problem of a chain falling off. We could attempt to replace the sprockets and chain, with gears and belts. Then, we can use the tensioner for switching bike gears. This is a very promising solution.
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Source (APA format):
Wang, W. (2006, August 31). Patent US20060194664 - Half pitch chain structure for a show bike. Retrieved September 05, 2016, from https://www.google.com/patents/US20060194664?dq=safe bike chain
Artifact Summary:
This is a chain that related to the half pitch chain structure that use for show bike, it make up of a small plate with outer link at one end while inner link in other that connect to the outer link of adjacent plate.
Artifact Critique:
The patented item solve my problem by provide a half pitch chain structure which has a flat top portion that is safe for a rider. The innovation also provide wide and narrow section allow it to mesh with the teeth easily prevent malfunction where chain miss mesh. However, some bad attributes are that the chain are innovate specific for show bike. Which limit of certain bike we can use the product. One unique aspect about this patent are that the flat top portion to save time in length adjustment for the bike.
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Source (APA format):
Kang, H. (2011, February 10). Patent US20110034280 - Bike chain checker. Retrieved September 02, 2016, from https://www.google.com/patents/US20110034280?dq=bike chain
Artifact Summary:
This chain design is meant to have a marker that, when the chain is in certain positions, determines and easily shows if the bike chain is too loose. If the chain comes over the lever bar, then the loose allowance on the chain is too large.
Artifact Critique:
This solution is good in that it shows the user in a clear way that the chain is too loose, but does not fix the problem or prevent it from happening. Maybe if the level bar held the chain to the sprocket/gear, it would be better.
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Source (APA format):
Carstensen, U., & Carstensen, U. 2. (2011, June 30). Protection arrangement of a drive chain and use it. Retrieved September 07, 2016, from https://patents.google.com/patent/DE102008031803B4/en?surl=1
Artifact Summary:
The hydraulic damper that invented to overcome the issue of loose chain become jam, or wedged, between the sprocket and the bicycle frame while the chain is whipping. It function in cooperation with the chain up to damp undesirable whipping of drive chain that can either rotary type damper or a piston type damper. The damper damp the rotational movement of the chain tension pulley cage pivot, the damper heavily damp the forward and backward movement of the chain tension allow free action of the chain.
Artifact Critique:
The invention do prevent the damage of the chain. The fluid inside the damper act as a retardant that smooths out the jerkiness or unwanted vibration of the chain. This allow chains to flow over sprocket and chain slides easily. The damp also reduce chain bounce when rifting over rough terrain, improve chain retention, shifting , and noise reducing. However , this type of invention only focus on the problem of mountain bike.
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Source (APA format):
Shimano, K. (1983, September 27). Derailleur for a bicycle. Retrieved September 07, 2016, from https://patents.google.com/patent/US4406643A/en?surl=1
Artifact Summary:
Aims to provide tension to the driving chain, like a derailleur is supposed to, but not allow slack in the chain. Resistance is placed on the changeover chain, so that it can still perform the swinging motion it needs, but not swing too much, to where it interferes with the tension of the chain.
Artifact Critique:
The tension of the derailleur cannot be changed while riding, must be done before or after when the bike is stopped and the rider has the appropriate tools. This is better for a gear-change capable bike, but it does not specify whether or not there is a limit or minimum number of gear changes that it can handle.
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Source (APA format):
Carstensen, U., & Carstensen, U. 2. (2008, July 27). Protection arrangement of a drive chain and use it. Retrieved September 07, 2016, from https://patents.google.com/patent/DE102008031803B4/en?surl=1
Artifact Summary:
The invention relate to protection for the bicycle. The sprocket inside enclose with the elastic sleeve connect to the drive chain around the chain wheel and the design to be open so that the teeth of the sprocket can engage the chain link.
Artifact Critique:
The invention do provide the protection for the sprocket. However, there're some number of disadvantage. One of which is the sprocket release the cover element sector to the chain, allow lubricant can leak the dirt to enter the chain. One other disadvantage are the chain protection will not be permanent due to the problem with the rubber sleeve as the sheath quickly wears off during rotation.
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Source (APA format):
Car Emissions and Global Warming. (n.d.). Retrieved September 06, 2016, from http://www.ucsusa.org/clean-vehicles/car-emissions-and-global-warming#.V879ikdf1QM
Artifact Summary:
This is to warn of the effects of global warming and how they are coming about. Global warming is partially being caused by all of the worldwide emissions from our gas burning cars.
Artifact Critique:
This source helps us see the need to use bikes and other non-fuel burning vehicles, but it doesn't help with our main problem of the bike's chain falling off constantly.
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Source (APA format):
Montgomery, A. (2016). Bike Gears: How Do They Work. Retrieved September 06, 2016, from http://sportivecyclist.com/bike-gears-how-do-they-work/
Artifact Summary:
This source shows us better, and more in depth, how a bike works. Showing how the sprockets, chain and shifting devices work together.
Artifact Critique:
This source will help us better understand how the bicycle does what it does. We need to know how the chain actually makes the wheel turn, and how the parts interact with each other to find a better solution.
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Source (APA format):
President, B. S. (n.d.). Bicycling: Number of participants U.S. 2014 | Statistic. Retrieved September 06, 2016, fromhttp://www.statista.com/statistics/191204/participants-in-bicycling-in-the-us-since-2006/
Artifact Summary:
This source shows some statistics about bicycling. It tells how many people each year are involved in bicycling, which provides us with data we can use for our solution.
Artifact Critique:
The data here can be useful for statistics when we need them later on to describe the effects a chain falling off can have on how many people.
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Ethicality Summary:
Listed above are seven patents and three sources with statistics, related to the issue of bike chains. People have created patents aiming to fix the problems and improve the functionality of chains, such as chain tensioners, guards, and more, that all help to ensure the chain stays secure. Though one of the of the three source artifacts is basing justification for the problem on the fact that bikes are a more ecofriendly mode of travel, the problem can still be proven ethical. Studies have been conducted about, and data collected for, injuries due to biking accidents; 34.1% involve the chain malfunctions. This problem can be solved with proper maintenance of the bike, however, chains will eventually develop problems because the average person does not have the skills of a bicycle mechanic.