United States Patent [19] [H] Patent Number: 4,674,658
Van Brocklin [45] Date of Patent: Jun. 23, 1987
[54] FLUID DISPENSER
[75] Inventor: Owen F. Van Brocklin, Bristol, Conn.
[73] Assignee: Risdon Corporation, Naugatuck,
Conn.
[21] Appl. No.: 772,563
[22] Filed: Sep. 4,1985
[51] Int. CU B76D 5/52
[52] U.S. CI 222/137; 222/145;
137/576; 141/23
[58] Field of Search 222/145, 135, 137, 136,
222/96, 160, 185, 335, 372, 373, 634, 409, 631; 137/255, 575, 576, 581; 141/105, 21, 25, 23, 26;
251/4, 7, 9; 366/182, 130
[56] References Cited
U.S. PATENT DOCUMENTS
1,977,571 10/1934 Brumm 137/575
3,100,102 8/1963 Haan 251/9
3,237,808 3/1966 Witt et al 222/145
3,960,174 6/1976 Latimer et al 137/575
4,429,852 2/1984 Tersteegen et al 251/9
Primary Examiner—Joseph J. Rolla
Assistant Examiner—Kenneth Noland
Attorney, Agent, or Firm—St. Onge, Steward, Johnston
& Reems
[57] ABSTRACT
A device for mixing and dispensing fluid is disclosed and comprises first and second containers each having a valve for dispensing fluid. The valve is normally biased to a closed position and operable against said bias to an open position. Piston and cylinder elements define a chamber for receiving the fluids. The piston element is movable in response to dispensing of fluid into said chamber. The piston element is operably connected to the valves and exerts a force on the valves to maintain them in an open position. The mixed fluids in the chamber are thereafter dispensed through a handpiece.
22 Claims, 13 Drawing Figures
