The invention relates to a fluid reservoir for a paint spray gun, comprising a receptacle (1) and a lid that can be placed thereupon and is provided with a connecting element (3) in order to mount the fluid reservoir on the paint spray gun or an adapter. The receptacle (1) is provided with a ventila
The invention relates to a fluid reservoir for a paint spray gun, comprising a receptacle (1) and a lid that can be placed thereupon and is provided with a connecting element (3) in order to mount the fluid reservoir on the paint spray gun or an adapter. The receptacle (1) is provided with a ventilation hole (4) which can be sealed using a valve. In order to improve the tightness of the valve, said valve encompasses two valve seats for sealing the ventilation port (4), which are disposed one behind another in the direction of flow.
대표청구항▼
The invention claimed is: 1. In a fluid reservoir for a paint spray gun comprised of a receptacle and a lid that can be placed thereon, wherein the lid has provision for placing the fluid reservoir on the paint spray gun or an adapter and wherein the receptacle has a ventilation port that can be op
The invention claimed is: 1. In a fluid reservoir for a paint spray gun comprised of a receptacle and a lid that can be placed thereon, wherein the lid has provision for placing the fluid reservoir on the paint spray gun or an adapter and wherein the receptacle has a ventilation port that can be opened and closed by means of a valve, the improvement comprising: a double seat valve with two valve seats one after the other in the direction of flow and separated from one another; said double seat valve being comprised of (a) the ventilation port formed as a tapered through hole in a wall of the receptacle to define a first valve seat; (b) an open hollow cylinder surrounding said tapered through hole, said open hollow cylinder having a preselected external diameter, oriented normal to the receptacle wall, and having an exterior surface extending from the receptacle wall to its open end, said exterior surface of said hollow cylinder defining a second valve seat adjacent said receptacle wall; (c) a closure element received on said open hollow cylinder and being in engagement with the exterior surface, said closure element being composed of a hollow cylindrical base body having an internal diameter substantially equal to said preselected external diameter of said open hollow cylinder, and a cap formed on one end of said base body; (d) said cap including a support part that extends from said cap and terminates at its lower end in a tapered plug for cooperating with said tapered hole to form a first tight seal; (e) a portion of said hollow cylindrical base body contacting said second valve seat defined by said exterior surface of said hollow cylinder adjacent said receptacle wall to form a second tight seal (f) said closure element being displaceable relative to said open hollow cylinder between a first position, in which the ventilation port is closed off by the double seat valve and any leakage of liquid from the receptacle through the first tight seal will be trapped by the second tight seal, and a second position, in which the double seat valve is open and an equalization of pressure is achieved via ventilation flow. 2. The improvement according to claim 1 wherein said closure element is releasably held relative to said hollow cylinder in the first and second positions by mutually coacting elements. 3. The improvement according to claim 2 wherein the mutually coacting elements comprise a rib projecting radially from one of said open hollow cylinder and hollow cylindrical base body and two spaced circumferentially extending grooves defined by the other of said open hollow cylinder and hollow cylindrical base body. 4. The improvement according to claim 2 wherein a bypass channel for air is defined by said open hollow cylinder located between the second tight seal and the open end of the open hollow cylinder. 5. In a fluid reservoir for a paint spray gun comprised of a receptacle and a lid that can be placed thereon, wherein the lid has provision for placing the fluid reservoir on the paint spray gun or an adapter and wherein the receptacle has a ventilation port that can be opened and closed by means of a valve, the improvement comprising: a double seat valve with two valve seats one after the other in the direction of flow and separated from one another; said double seat valve being comprised of (i) the ventilation port formed as a tapered through hole in a wall of the receptacle to define a first valve seat; (ii) an open hollow cylinder surrounding said tapered through hole, said open hollow cylinder having a preselected external diameter, oriented normal to the receptacle wall, and having an exterior surface extending from the receptacle wall to its open end, said exterior surface of said hollow cylinder defining a second valve seat adjacent said receptacle wall; (iii) a valve closure element composed of a cap from which depends an open hollow cylindrical base member having an internal diameter substantially equal to said preselected external diameter and having an interior surface; (iv) said valve closure element being received on said hollow cylinder with the interior surface of the valve closure element engaging the exterior surface of the hollow cylinder and with the cap having clearance from the open end of the hollow cylinder; (v) said valve closure element defining a support part that extends from said cap to below the open end of the hollow cylindrical base member and terminates at its lower end in a tapered plug to be received in said tapered hole and in cooperation therewith to serve as a first tight seal; (vi) said valve closure element defining a portion of the interior surface located at the open end of the open hollow cylindrical base member that coacts with said second valve seat to serve as a second tight seal; (vii) said first and second tight seals being arranged serially in the direction of a ventilation flow pathway that extends from said ventilation through hole, through the clearance between the hollow cylinder and the support member, through the clearance between the cap and the open end of the hollow cylinder, between the exterior surface of the hollow cylinder and the interior surface of the hollow cylindrical base member, and exiting through the open end of the hollow cylindrical base member; (viii) said valve closure element being displaceable relative to said hollow cylinder between a first position, in which the ventilation port is closed off serially by said first and second tight seals so the interior of the receptacle is shut off from the environment and any leakage of the first tight seal will be trapped by the second tight seal, and a second position, in which the double seat valve is open and an equalization of pressure is achieved via the ventilation flow pathway. 6. In a fluid reservoir for a paint spray gun comprised of a receptacle and a lid that can be placed thereon, wherein the lid has a connecting element in order to place the fluid reservoir on the paint spray gun or an adapter and wherein the receptacle has a ventilation port that can be opened and closed by means of a valve, the improvement comprising: a double seat valve with two valve seats one after the other in the direction of flow and separated from one another; said double seat valve being comprised of a. the ventilation port formed as a tapered through hole in a wall of the receptacle to define a first valve seat, b. a hollow cylinder surrounding said tapered through hole, said hollow cylinder having a preselected external diameter, is oriented normal to the receptacle wall, and having an exterior surface extending from the receptacle wall to the open end, c. a peripheral rib projecting radially from said exterior surface located between the receptacle wall and said open end, d. said exterior surface defining a second valve seat adjacent said receptacle wall, e. a passageway defined in the exterior surface from a point above said second valve seat to said open end; f. a valve closure element composed of a cap from which depends a hollow cylindrical base member having an internal diameter substantially equal to said preselected external diameter and having an interior surface in which is defined two spaced circumferentially extending grooves, g. said valve closure element defining a part that depends from said cap to below the hollow cylindrical base member and has a cross section to easily fit into said hollow cylinder with clearance and terminates at its lower end in a tapered plug to be received in said tapered hole and in cooperation therewith to serve as a first tight seal; h. said valve closure element defining a surface located at a lower part of the hollow cylindrical base member that coacts with said second valve seat to serve as a second tight seal; i. said first and second tight seals being arranged one behind the other relative to ventilation flow; j. said valve closure element being displaceable relative to said hollow cylinder between a first position, in which ventilation is closed off by said first and second tight seals, and a second position, in which both said first and second tight seals are open and an equalization of pressure between the interior of the receptacle and the environment is made possible via the ventilation port, and k. said valve closure element being held detachably relative to said hollow cylinder in the second position by the coaction of said rib and said grooves. 7. A kit for a paint spray gun comprised of a receptacle and a lid that can be placed thereon, wherein the lid has a connecting element in order to place the fluid reservoir on the paint spray gun or an adapter and wherein the receptacle has a ventilation port that can be opened and closed by means of a double seat valve with two valve seats one after the other in the direction of flow and separated from one another said double seat valve being comprised of the ventilation port formed as a tapered through hole in a wall of the receptacle to define a first valve seat; said tapered through hole surrounded by an open hollow cylinder, having a preselected external diameter, oriented normal to the receptacle wall, and having an exterior surface extending from the receptacle wall to its open end, said exterior surface of said hollow cylinder defining a second valve seat adjacent said receptacle wall; a valve closure element detachably connected to the lid and being composed of a cap from which depends an open hollow cylindrical base body having an internal diameter substantially equal to said preselected external diameter, said open hollow cylindrical base body being receivable over the open end of said hollow cylinder and engageable with the exterior surface; a support part that extends with clearance from said cap to below the hollow cylindrical base body and terminates at its lower end in a tapered plug for cooperating with said tapered hole to effect a first tight seal; a portion of the hollow cylindrical base body remote from said cap that cooperates with said second valve seat to effect a second tight seal; said first and second tight seals being arranged serially relative to ventilation the path of which extends from said through hole, between the hollow cylinder and the support member, between the cap and the open end of the hollow cylinder, and between the exterior surface of the hollow cylinder and the hollow cylindrical base body exiting to the environment; said valve closure element being displaceable relative to said hollow cylinder between a first position, in which the ventilation port is closed off serially by said first and second tight seals so interior of the receptacle is shut off from the environment and any leakage of liquid from the receptacle through the first tight seal into the ventilation path will be trapped by the second tight seal, and a second position, in which both tight seals are open and an equalization of pressure is achieved via ventilation flow; and said valve closure element being releasably held relative to said hollow cylinder in one of the first and second valve positions. 8. The kit according to claim 7 wherein at least one valve closure element is integrally attached to an edge of the lid by a web, the web being a predetermined breaking point so the valve closure element can be torn off.
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이 특허에 인용된 특허 (8)
Joseph, Stephen C. P.; Douglas, Malcolm F.; Butler, Alan F.; Bastow, David R.; Salhus, Jerry E.; Hartfel, Margaret A., Apparatus for spraying liquids, disposable containers and liners suitable for use therewith.
Kosmyna Michael J. (Toledo OH) Charpie Mark E. (Lambertville MI) Wisniewski Ralph A. (Toledo OH), Hand held paint spray gun with top mounted paint cup.
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