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Class Information
Number: 137/539
Name: Fluid handling > Line condition change responsive valves > Direct response valves (i.e., check valve type) > Reciprocating valves > Spring biased > Ball valves
Description: Valves in which the moving element is substantially spherical.










Sub-classes under this class:

Class Number Class Name Patents
137/539.5 With follower 77


Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
4370072 Utility brush Jan. 25, 1983
4365648 Check valve Dec. 28, 1982
4352655 Engine Oct. 5, 1982
4347915 Grease fitting Sep. 7, 1982
4340084 Check valve Jul. 20, 1982
4333497 Faucet assembly with mixing valve Jun. 8, 1982
4325072 Writing device control apparatus Apr. 13, 1982
4320857 Device for the melting and measured discharge of a thermoplastic adhesive Mar. 23, 1982
4315601 Chemical injector Feb. 16, 1982
4296186 Two part pressure relief valve Oct. 20, 1981
4291660 Recycling exhaust fumes valve Sep. 29, 1981
4287912 Monoflow ball valve and system Sep. 8, 1981
4286622 Check valve assembly Sep. 1, 1981
4274556 Dual dispensing container Jun. 23, 1981
4269237 Sump oil draining and collecting device May. 26, 1981
4234056 Lubrication fitting Nov. 18, 1980
4219963 Automatic spraying secateur Sep. 2, 1980
4217931 Adjustable check valve Aug. 19, 1980
4204560 Relief valve for fluid systems May. 27, 1980
4197875 Ball check valve Apr. 15, 1980
4176682 Check valve ball stop clip Dec. 4, 1979
4169578 Rotary valve with spring biased valve member Oct. 2, 1979
4161260 Cover for pressure pots Jul. 17, 1979
4157281 Method and apparatus for reclaiming solvents from solvent-bearing sludge material Jun. 5, 1979
4132395 Shock absorber with improved extension damping Jan. 2, 1979
4091839 Ball check valve May. 30, 1978
4084304 Method of constructing a valve Apr. 18, 1978
4072167 Check valve with torsion spring and method of assembly Feb. 7, 1978
4072291 Rotary valve with spring biased valve member Feb. 7, 1978
4064889 Break-away safety valve Dec. 27, 1977
4018247 Springless ball valve for high speed compressors Apr. 19, 1977
4003399 Anti-syphon device for a water supply line Jan. 18, 1977
3995657 Valve Dec. 7, 1976
3945795 Means for preventing damage to jacketed flexible pumping strand Mar. 23, 1976

1 2 3 4










 
 
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