Hose coupling
Due to the great variety of the designs and the number of countries in which they were created, it is difficult to trace the origin of many.
Patents that cover designs similar to those below include: See Garden hose thread.
It seals as a soft copper seat located in the spud is drawn against the stem by tightening the wing nut.
Holedall IX internally expanded (internally swaged) hose coupling is used in higher pressure applications, or where the hose is exposed to higher end pull, or where a full flow is required.
The male and female straight (non-tapered) threads screw together and the connection is sealed with a gasket.
A camlock, also called cam and groove, is a quick connect fluid transfer hose coupling that consists of a male "adapter" and female "coupler".
Used in agricultural, irrigation, cleaning, and construction industries, but most commonly for water, mortar, bitumen, and bulk products.
The concept was developed to replace metal hose end connectors in coal mines, which were prone to cause static sparks and the possibility of methane gas explosions.
A Japanese quick connect and disconnect coupling used on fire hoses in Japan and defined by JIS B9911;[9] available in several sizes: 25A (1-inch), 40A (1+1⁄2-inch), 50A (2+1⁄2-inch), 65A (2" ), 75A (3-inch).
A variety of manufacturers sell the same style quick-connect garden hose coupling.
[10][11][12][13] The "Air King"[14] universal air hose coupling, also known as a "Chicago style" fitting, is malleable iron or brass "quarter turn" "sexless coupling" usually found on large pneumatic tools like jackhammers.
[6] The fitting is considered "universal", because a common two-lug head is used on all sizes ranging from 0.25 to 1 inch (6 to 25 mm).
Developed by the Canada Metal Company for the Canadian wildfire firefighters in 1977 to overcome issues of snagging and water volume loss associated with the smaller-diameter Storz couplings, these couplings are now specified for use by Canadian, U.S., and Australian wildland fire departments.
Note that Wajax Manufacturing submitted a competing design, but was not selected, so referring to these fittings as "Ajax couplers" is incorrect.
This is a sexless quarter-turn bayonet hose coupler, originally manufactured by the Karasto company distinguishable by the gasket profile, which has a flat outer ring enclosing a domed middle section, as well as the distance between the claws being 40 mm.
It is easy to connect, has no particular male or female end, and lugs are on the inside of the joint.
This is the standard coupling on fire hoses in Denmark, Germany, Austria, Poland, Switzerland, Sweden, the Netherlands and Greece.
It can be manufactured by casting for general hose connection and low pressure applications, but for firefighting, it is better to use forgings to guarantee the safety and durability of the coupling.
