Fluid dispenser

Claim 3

A single-shot device for dispensing fluid comprising: at least one container storing said fluid under pressure; a valve for dispensing said fluid from said container, said valve biased to a closed position and movable by a predetermined force against said biased to an open position; means for opening said valve; piston and cylinder elements defining a chamber for receiving said fluid, one said element being movable in response to dispensing of fluid into said chamber, said one element being operably connected to said valve and exerting said predetermined force on said valve to maintain it in said open position; and means for dispensing fluid from said chamber.

Claim 4

A single-shot device for dispensing fluid comprising: at least one container storing said fluid under pressure; a valve for dispensing said fluid from said container, said valve biased to a closed position and movable by a predetermined force against said biased to an open position; means for opening said valve; piston and cylinder elements defining a chamber for receiving said fluid, one said element being movable in response to dispensing of fluid into said chamber, said one element being operably connected to said valve and exerting said predetermined force on said valve to maintain it in said open position; and means for dispensing fluid from said chamber.

Claim 5

A dispenser according to claim 2 and further including a case having upper and lower portions integrally formed in a single piece said lower portion defining said cylinder element, said upper portion storing said at least one container.

Claim 6

A dispenser according to claim 3 wherein said valve includes a valve stem movable relative to said container to actuate said valve, said passageway in said piston element being sized and shaped to receive an end portion of said valve stem.

Claim 7

A dispenser according to claim 4 wherein said dispenser further includes a plunger for moving said container from said initial position toward said piston, said plunger operable by manual pressure, and slidable reciprocally with respect to the upper portion of the case, said plunger slidable from said initial position to a position wherein said valve is actuated.

Claim 8

A dispenser according to claim 5 wherein said cylinder element comprises a cylindrical tube having an inner diameter sized to receive said piston element.

Claim 9

A dispenser according to claim 6 wherein said piston element comprises a cylindrical sleeve having a cap at one end thereof, said cap having said passageway therein for receiving said valve, said cap having a sufficient area to overcome said bias of said valve when fluid under pressure is dispensed into said chamber.

Claim 10

A dispenser according to claim 7 wherein said sleeve has an annular terminal edge, and wherein said cylinder element includes an annular groove sized to receive and to frictionally engage said terminal edge to form a tight seal between said piston and cylinder elements when they are in an initial position.

Claim 11

A dispenser according to 8 wherein said cylinder element has a bottom end portion including a closure defining a sealed chamber, said bottom end portion having an outlet for dispensing fluid from said chamber.

Claim 12

A dispenser according to 8 wherein said cylinder element has a bottom end portion including a closure defining a sealed chamber, said bottom end portion having an outlet for dispensing fluid from said chamber.

Claim 13

A dispenser according to 9 wherein said cylinder includes a stop surface for limiting the downward stroke of the piston.

Claim 14

A dispenser according to 9 wherein said cylinder includes a stop surface for limiting the downward stroke of the piston.

Claim 17

A dispenser for dispensing fluid under pressure comprising: at least one container having a fixed volume for storing said fluid under pressure, a valve for dispensing said fluid from said container, said valve being normally biased to a closed position and movable relative to said container against said biased to an open position; a casing having an upper portion sized and shaped to store at least said one container, said casing having a lower portion forming a cylinder element; a piston element slidable within said cylinder element, said piston and cylinder elements defining a chamber for receiving said fluid, said piston movable from a rest position toward said upper portion of said case, said piston having a passage permitting flow of fluid from said container to said chamber through said valve; said container being movable reciprocally with respect to said upper case portion from an initial position toward said piston to move said valve to an open position wherein fluid is dispensed into said chamber; and said piston being forced by pressure in said chamber into engagement with said valve and being movable by said chamber pressure with said container to maintain said valve in an open position.

Claim 18

A dispenser for dispensing fluid under pressure comprising: at least one container having a fixed volume for storing said fluid under pressure, a valve for dispensing said fluid from said container, said valve being normally biased to a closed position and movable relative to said container against said biased to an open position; a casing having an upper portion sized and shaped to store at least said one container, said casing having a lower portion forming a cylinder element; a piston element slidable within said cylinder element, said piston and cylinder elements defining a chamber for receiving said fluid, said piston movable from a rest position toward said upper portion of said case, said piston having a passage permitting flow of fluid from said container to said chamber through said valve; said container being movable reciprocally with respect to said upper case portion from an initial position toward said piston to move said valve to an open position wherein fluid is dispensed into said chamber; and said piston being forced by pressure in said chamber into engagement with said valve and being movable by said chamber pressure with said container to maintain said valve in an open position.

Claim 19

A dispenser according to claim 12 wherein said upper and lower case portions are integrally formed in a single piece.

Claim 20

A dispenser according to claim 12 wherein said valve includes a valve stem movable relative to said container to actuate said valve, said passageway in said piston being sized and shaped to receive an end portion of said valve stem.

Claim 21

A dispenser according to claim 12 wherein said dispenser further includes a plunger for moving said containers from said initial position toward said piston, said plunger operable by manual pressure, and slidable reciprocally with respect to the upper portion of the case, said plunger slidable from said initial position to a position wherein said valve is actuated, and slidable back to its initial position to prevent further sliding of said containers with respect to said upper portion of said case.

Claim 22

A dispenser according to claim 12 wherein said cylinder element comprises a cylindrical tube having an inner diameter sized to receive said piston.

Claim 23

A dispenser according to claim 12 wherein said piston comprises a cylindrical sleeve having a cap at one end thereof, said cap having said passageway therein for receiving said valve, said cap having a sufficient area to overcome said bias of said valve when fluid under pressure is dispensed into said chamber.

Claim 24

A dispenser according to claim 17 wherein said sleeve has an annular terminal edge, and wherein said cylinder element includes an annular groove sized to receive and to frictionally engage said terminal edge to form a tight seal between said piston and cylinder elements when they are in an initial position.

Claim 25

A dispenser according to claim 17 wherein said cylinder has a bottom end portion including a closure defining a sealed chamber, said bottom end portion having an outlet for dispensing fluid from said chamber.

Claim 26

A dispenser according to claim 19 wherein said cylinder includes a stop surface for limiting the downward stroke of the piston.

Claim 27

A dispenser according to claim 12 and further including a second container having a fixed volume and storing fluid under pressure, said container having a valve normally biased to a closed position and movable relative to said container against said biased to an open position, said piston having a passage for each said valve to permit fluids under pressure to be dispensed and mixed within said chamber.