Discharge device for flowable media using a thrust piston pump
First Claim
1. Discharge device for discharging a flowable medium (24) comprising:
- a housing having a first housing part (12) and a second housing part (25);
a pump piston (21) disposed in at least one of the first housing part (12) and the second housing part (25) and moved in response to movement of at least one of the first housing part (12) and the second housing part (25);
a medium reservoir (20) for containing the medium (24), said medium reservoir (20) also forming a pump chamber (23), said pump piston (21) being moveable to produce pressure in the pump chamber (23);
a discharge channel (19) leading from the pump chamber (23) to a discharge opening (14) to allow release of the medium (24) when the pump piston (21) is moved to produce pressure in the pump chamber (23);
at least one intermediate stop (37) disposed between a starting position and a subsequent position of the second housing part (25), said intermediate stop being non-destructible in response to a first discharge stroke and separating said first discharge stroke from a second discharge stroke to prevent complete emptying of said medium reservoir (20) in a single motion;
at least two pressure release points (27) restricting operation of the second housing part (25) until a minimum actuating force is applied to overcome the pressure release points (27) and allow movement of the second housing part (25) through a first discharge stroke; and
wherein the second housing part (25) is operable for moving the pump piston (21) in a first direction through a first discharge stroke from a starting position to the non-destructible intermediate stop (37) and through a second discharge stroke from the non-destructible intermediate stop (37) to the subsequent position to discharge successive partial charges of said medium.
2 Assignments
0 Petitions
Accused Products
Abstract
A disposable atomizer for discharging successive partial discharge amounts as a spray has a base body (12), a projecting nose adapter (13) with a nozzle (14), actuating shoulders (35) where two fingers can rest, and an actuating part, containing an actuating sleeve (25) and a medium store (20), which can be pressed into the base body (12). A hollow needle (17) can penetrate the closure piston-stopper (21) of said medium store (20). A ring (28) is mounted on the actuating sleeve (25) by spokes (29) and predetermined breaking points (30), the ring (28) separating in response to typical actuating pressure when the actuator is used the first time. The spokes (29) strike a stop which thus limits the first partial discharge stroke. By rotating the actuating sleeve (25), the actuating part is moved into a starting position for a second partial discharge stroke, and when intermediate webs in the form of material bridges are broken out, the second partial discharge stroke can be executed.
49 Citations
28 Claims
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1. Discharge device for discharging a flowable medium (24) comprising:
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a housing having a first housing part (12) and a second housing part (25);
a pump piston (21) disposed in at least one of the first housing part (12) and the second housing part (25) and moved in response to movement of at least one of the first housing part (12) and the second housing part (25);
a medium reservoir (20) for containing the medium (24), said medium reservoir (20) also forming a pump chamber (23), said pump piston (21) being moveable to produce pressure in the pump chamber (23);
a discharge channel (19) leading from the pump chamber (23) to a discharge opening (14) to allow release of the medium (24) when the pump piston (21) is moved to produce pressure in the pump chamber (23);
at least one intermediate stop (37) disposed between a starting position and a subsequent position of the second housing part (25), said intermediate stop being non-destructible in response to a first discharge stroke and separating said first discharge stroke from a second discharge stroke to prevent complete emptying of said medium reservoir (20) in a single motion;
at least two pressure release points (27) restricting operation of the second housing part (25) until a minimum actuating force is applied to overcome the pressure release points (27) and allow movement of the second housing part (25) through a first discharge stroke; and
wherein the second housing part (25) is operable for moving the pump piston (21) in a first direction through a first discharge stroke from a starting position to the non-destructible intermediate stop (37) and through a second discharge stroke from the non-destructible intermediate stop (37) to the subsequent position to discharge successive partial charges of said medium. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. Discharge device for discharging a flowable medium comprising:
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a housing having a first housing part (12) and a second housing part (25);
a pump piston (21) disposed in at least one of the first housing part (12) and the second housing part (25) and moved in response to movement of at least one of the first housing part (12) and the second housing part (25);
a medium reservoir (20) for containing the medium (24), said medium reservoir (20) also forming a pump chamber (23), said pump piston (21) being moveable to produce pressure in the pump chamber (23);
a discharge channel (19) leading from the pump chamber (23) to a discharge opening (14) to allow release of the medium (24) when the pump piston (21) is moved to produce pressure in the pump chamber (23);
at least one intermediate stop (37) disposed between a starting position and a subsequent position of the second housing part (25) to prevent complete emptying of said medium reservoir (20) in a single motion;
at least two pressure release points (30) holding the second housing part (25) stationary until a minimum actuating force is applied to allow movement of the second housing part (25) through a first discharge stroke; and
wherein the second housing part (25) is operable for moving the pump piston (21) in a first direction through the first discharge stroke from a starting position to the intermediate stop (37) and through a second discharge stroke from the intermediate stop (37) to a subsequent position to discharge successive partial charges of said medium; and
wherein the second housing part (25) is movable in a second direction relative to the first discharge stroke for generating a releasing action relative to the intermediate stop (37) and allowing the second discharge stroke. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. Discharge device for flowable media comprising:
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a housing having a first housing part (12) and a second housing part (25);
a thrust piston pump (46);
a medium reservoir (20);
a pump chamber (23) of the thrust piston pump (46) being formed by the medium reservoir (20);
a discharge channel (19) leading from the pump chamber (23) to a discharge opening (14);
a pump piston (21) being movable in the pump chamber (23) over at least two partial discharge strokes from a starting position to at least one intermediate stop position and finally to a subsequent stop position in order to provide discharge successive partial discharges of said medium;
at least one intermediate stop (37) locking the thrust piston pump (46) in the intermediate stop position; and
unlocking means for unlocking the thrust piston pump (46) from the intermediate stop for a second one of the two partial discharge strokes in response to an unlocking action, the unlocking action being a rotating action;
at least two destructible pressure points (27) providing for a minimum actuating force to be applied to the pump before the piston moves, wherein the first housing part (12) and the second housing part (25) are moveable relative to each other; and
wherein the intermediate stop and the unlocking means are provided on said first housing part (12) and said second housing part (25).
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Specification