John Cini, 83, a consultant to the board of directors of Cini-Grissom Associates, a food service equipment firm that is run by one of his sons, died Saturday at Suburban Hospital in Bethesda. He had a heart ailment.

Mr. Cini, who was born in New York City, worked for 50 years for Straus-Duparquet and its predecessors, a food service equipment dealership in New York. He was a vice president of it when he retired 23 years ago. The company designed the kitchens of several well-known restaurants in New York City.

In 1980, Mr. Cini moved from his home in The Bronx, N.Y., to Bethesda and became a consultant to Cini-Grissom, which has offices in Potomac, Cleveland and New York. One of the principals of the business is his son, John C. Cini of Potomac.

The senior Mr. Cini was a member emeritus of the Food Service Design Consultants International, a founding member of the International Society of Food Consultants and a 33rd degree Mason.

In addition to his son John, Mr. Cini's survivors include his wife of more than 50 years, Jeannette Heidt Cini of Bethesda; another son, William L., of Topsfield, Mass., and five grandchildren.

The family suggests that expressions of sympathy be in the form of contributions to the Montgomery County Heart Fund Memorial.