HOW DOES A BICYCLE PUMP WORK – SLEEVELESS BICYCLE JERSEYS.
How Does A Bicycle Pump Work
- A portable pump for inflating bicycle tires
- a small pump that fills bicycle tires with air
- A bicycle pump is a type of positive-displacement pump specifically designed for inflating bicycle tires. It has a connection or adapter for use with one or both of the two most common types of valves used on bicycles, Schrader or Presta.
bicycle pump
- a better “Vocabulary” help me?
- PowerGUARD™ Power Conditioning work?
how does
- activity directed toward making or doing something; “she checked several points needing further work”
- A place or premises for industrial activity, typically manufacturing
- Such activity as a means of earning income; employment
- exert oneself by doing mental or physical work for a purpose or out of necessity; “I will work hard to improve my grades”; “she worked hard for better living conditions for the poor”
- a product produced or accomplished through the effort or activity or agency of a person or thing; “it is not regarded as one of his more memorable works”; “the symphony was hailed as an ingenious work”; “he was indebted to the pioneering work of John Dewey”; “the work of an active imagination”;
- Activity involving mental or physical effort done in order to achieve a purpose or result
work
An Evening with Psychogenic Shock
This was August 4th, 2006. You can find a slightly less coherent version of this on bikeforums.net, posted the day after it happened.
We’d just bought a new bike for Anne Marie, the first she’d had in quite a while. Like a lot of people who don’t bike much, she wanted to replace the saddle that came with her bike with something a bit softer, so we went out and bought a couple of saddles at MEC to try out. That evening, after I biked home from work, we stuck one of the new saddles on her bike, and went for a quick ride see how it faired. I brought both our bikes upstairs from the basement (this was before I’d built the new shed), put them out in the driveway, we got on our bikes, and rolled out. When I tried to turn at the end of our driveway, my front wheel literally slipped out from under me.
What I had failed to realize was that somehow, on my way home, I had made a small hole in my inner tube. It must have been very close to when I was home, because I failed to notice it. Sometime after I got home, during the half hour I was eating dinner and installing this new seat on Anne Marie’s bike, all the air had leaked out of my front tire. I’m usually pretty religious about checking my tire inflation before I ride, but I’d just ridden home 30 minutes ago so I didn’t bother. When I tried to make the corner at the end of my driveway, I was riding on my rim. Aluminum, of course, does not do nearly as good a job of sticking to pavement as rubber does, making it very difficult to lean into your corners.
As I fell, I reached out with my left hand to try and catch myself. The four fingers on my left hand were bent backwards, past the 90 degree point.
I said "Aaaaah!"
Anne Marie turned around, saw me lying on the ground, and came back. I got up, yelled, "Oh! My hand, my hand! Aaah!" jumped around a bit, shook my hand; the usual sorts of things one does.
Anne Marie asked, "Are you OK?"
I said, "Yeah, I’m fine. My hand hurts a little, but I’ll be OK." I was checking over my bike, making sure I didn’t scratch the paint. I was far more concerned about my bike than my hand at this point. I discovered the flat tire, and knew I’d have to replace the tube so I told Anne Marie, "You go on ahead without me. I’ll fix this up."
Anne Marie asked, "Are you sure?" but I told her, "Yes, I’m fine. Go, go." So she did. I walked my bike back up to the house.
Now, at this point I was starting to feel the effects of psychogenic shock, although I didn’t know it at the time. In fact, I didn’t even know why that was. Psychogenic shock isn’t "real shock"; it isn’t a life threatening condition for one, but many of the symptoms are the same. Essentially, after some sort of intense physical trauma (or sometimes even emotional trauma), your body goes a bit crazy, and dilates all your blood vessels. Since your blood vessels get bigger, your blood pressure drops through the floor, your heart has a hard time pumping blood to your brain. You can, in extreme cases, pass out. The correct thing to do is lie down, get your feet elevated, so you get blood to your head, and then call 911. I didn’t know any of this, which is why I did all the incredibly stupid things I’m about to describe.
I’m walking my bike up the driveway. At this point, I started to feel a little light headed. I figured it was just the after effects of a little adrenaline. I unlocked the door – took me a couple of tries to get the key in the lock for some reason. I had a bit of trouble getting my bike inside, it seemed heavy and clumsy. I sat down on the sofa for a minute, figuring it was still just adrenaline; I’d sit for a minute, and it would all be fine.
Then, my vision started getting a little swimmy. You know sometimes when you close your eyes real tight and then open them, and it takes a couple moments before you can see again? Just like that. I thought "I didn’t hit my head. I wonder if it’s possible to get a concussion without hitting your head. If I have a concussion, I should stay awake." My hand was numb and tingly. I started getting a sort of very warm and tingly band around my head, all pins and needles, like when your foot goes to sleep, except this was my head.
I remember falling over to my right, very slowly. Then I remember music. I think I was dreaming, maybe just hallucinating.
Some time passed.
The next thing I remember was waking up. I had absolutely no idea where I was or what was going on. I tried to open my eyes, but soon realized they were already open, I just couldn’t see anything. This was a little strange, because we live in a pretty built up area; when I’m in bed, even in the dead of night, I should be able to see some light from the street lights outside. Maybe the power was out? I sat there for a few
July 4 – Inflating
