United States Patent no]
Healy
[54] FUEL DISPENSING NOZZLE
[75] Inventor: James W. Healy, Hollis. N.H.
[73] Assignee: Healy Systems, Inc., Hudson, N.H.
[21] Appl. No.: 706,807
[22] Filed: May 29, 1991
[51] Int. CI.5 B67D 5/373
[52] U.S. CI 141/226; 141/208;
141/206; 141/225; 141/302; 141/59
[58] Field of Search 137/98; 141/206-229,
141/198, 392. 285, 295. 290-292, 296, 301, 302,
304, 305, 59
[56] References Cited
U.S. PATENT DOCUMENTS
413.355 1/1979 Mayer 141/217
1.998.221 4/1935 Conklin 141/225
3.323.560 6/1967 Ehlers 141/208
3.542.092 11/1970 Budzak el al 141/209
3.548.893 12/1970 Moore 141/208
3.638.689 2/1972 Eklund 141/214
3.811.486 5/1974 Wood 141/208
3.982.571 9/1976 Fenton et al 141/225
4.056.131 11/1977 Healy 141/206
4.057.086 11/1977 Healy 141/206
4.059.133 11/1977 Hansel 141/207
4.095.626 6/1978 Healy 141/206
4.121.635 10/1978 Hansel 141/207
US005174346A
[ii] Patent Number: 5,174,346 [45] Date of Patent: Dec. 29, 1992
4.258.760 3/1981 Moore 141/206
4.286.635 9/1981 McMath 141/98
4.336.830 6/1982 Healy 141/59
4.343.337 8/1982 Healy 141/226
4:372.353 2/1983 Weas 141/206
4.429,725 2/1984 Walker et al 141/302
4,450.879 5/1984 Wood 141/209
4.497,350 2/1985 .Guertin 141/206
4,809.753 3/1989 Fink, Jr 141/206
FOREIGN PATENT DOCUMENTS
1097775 1/1961 Fed. Rep. of Germany 141/226
Primary Examiner—Henry J. Recla
Assistant Examiner—Casey Jacyna
Attorney, Agent, or Firm—Fish & Richardson
[57] ABSTRACT
An improved fuel dispensing nozzle of significantly reduced size and weight has a single diaphragm that provides the vapor regulating function as well as providing the excess pressure and excess vacuum shut-off functions. Improved shut-off function is obtained by ensuring that chamber pressure is the same as that at the spout tip disposed in the vehicle fuel tank fill pipe. The improved fuel dispensing nozzle design also reduces the amount of accidental fuel spillage which may occur when refueling is concluded.
17 Claims, 6 Drawing Sheets
