1. A fill-through pressure indicator, comprising:
a pressure indication sleeve concentric with a fill valve; and
a diaphragm that causes the pressure indication sleeve to move when pressure changes, without sliding contact in a seal;
wherein the fill valve has a pin that is biased towards a position that closes the fill valve by a valve pin spring, and when the fill valve is closed, fluid whose pressure is to be indicated flows into a diaphragm chamber on a first side of the diaphragm, while an ambient fluid chamber on an opposite second side of the diaphragm is separated from the diaphragm chamber by the diaphragm and its seals, and the ambient fluid chamber is kept at ambient fluid pressure by vent holes in a top casing.
2. The fill-through pressure indicator according to claim 1, wherein the ambient fluid is air.
3. A fill-through pressure indicator, comprising:
a pressure indication sleeve concentric with a fill valve; and
a diaphragm that causes the pressure indication sleeve to move when pressure changes, without sliding contact in a seal;
wherein the fill valve has a pin that is biased towards a position that closes the fill valve by a valve pin spring, but when the pin is depressed to open the fill valve:
if the pressure outside the fill valve is greater than the pressure inside an article to be inflated, then air can flow into a fill chamber, through a hole in a top casing, and into a main air chamber, then through a channel into the article being inflated; or
if the pressure outside the fill valve is less than the pressure inside an article to be deflated, then air can flow from the article through the channel into the main air chamber, then through the hole in the top casing into the fill chamber and out into the ambient air.
4. A fill-through pressure indicator, comprising:
a pressure indication sleeve concentric with a fill valve;
a mirror that reflects the surface of the pressure indication sleeve; and
a lens through which colors on the pressure indication sleeve are viewed;
wherein the fill valve has a pin that is biased towards a position that closes the fill valve by a valve pin spring, but when the pin is depressed to open the fill valve:
if the pressure outside the fill valve is greater than the pressure inside an article to be inflated, then air can flow into a fill chamber, through a hole in a top casing, and into a main air chamber, then through a channel into the article being inflated; or if the pressure outside the fill valve is less than the pressure inside an article to be deflated, then air can flow from the article through the channel into the main air chamber, then through the hole in the top casing into the fill chamber and out into the ambient air.
5. A fill-through pressure indicator, comprising:
a pressure indication sleeve concentric with a fill valve;
wherein the fill valve has an actuator with a large enough top surface to prevent larger dust particles from entering when the fill valve is closed;
wherein there is an airtight seal within the fill valve when it is closed; and
wherein the fill valve has a pin that is biased towards a position that closes the fill valve by a valve pin spring, but when the pin is depressed to open the fill valve:
if the pressure outside the fill valve is greater than the pressure inside an article to be inflated, then air can flow into a fill chamber, through a hole in a top casing, and into a main air chamber, then through a channel into the article being inflated; or
if the pressure outside the fill valve is less than the pressure inside an article to be deflated, then air can flow from the article through the channel into the main air chamber, then through the hole in the top casing into the fill chamber and out into the ambient air.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A firearm capable of firing ammunition of various different caliber, said weapon comprising:
a barrel that will accept multiple different size or caliber ammunition or cartridges;
said barrel having an interior lined with a non-newtonian fluid and a para-aramid synthetic fiber lining containing the non-newtonian fluid; said fluid and lining being secured to said barrel at both ends of said barrel, and
wherein said fluid and lining are capable of centering and firmly holding the cartridge in the middle of the barrel.
2. The firearm capable of firing ammunition of various different caliber of claim 1, wherein the non-newtonian fluid is a Rheopectic fluid.
3. The firearm capable of firing ammunition of various different caliber of claim 1, wherein the non-newtonian fluid is a Dilatant fluid.
4. The firearm capable of firing ammunition of various different caliber of claim 1, wherein the para-aramid synthetic lining is in an overlapping circular shape.
5. The firearm capable of firing ammunition of various different caliber of claim 1, wherein the non-newtonian fluid is confined within the barrel by coiled springs that run laterally along the length of the barrel and are attached to the barrel.