A retrofittable pressure gauge for a spray gun includes a pressure sensor, located in a pressure chamber, a power source and a display unit, all enclosed within a case, a passageway providing fluid communication between the pressure chamber and a pressurised interior space of the spray gun when the
A retrofittable pressure gauge for a spray gun includes a pressure sensor, located in a pressure chamber, a power source and a display unit, all enclosed within a case, a passageway providing fluid communication between the pressure chamber and a pressurised interior space of the spray gun when the gauge is mounted on the spray gun and a mounting fixture configured for mounting the pressure gauge at a spreader valve or a trigger operated fluid valve of the spray gun.
대표청구항▼
The invention claimed is: 1. A kit, comprising a retrofittable pressure gauge and a valve bushing of a spreader valve or a trigger operated fluid valve of a spray gun; wherein said pressure gauge comprises: a case having a pressure chamber; a pressure sensor located in the pressure chamber; and a m
The invention claimed is: 1. A kit, comprising a retrofittable pressure gauge and a valve bushing of a spreader valve or a trigger operated fluid valve of a spray gun; wherein said pressure gauge comprises: a case having a pressure chamber; a pressure sensor located in the pressure chamber; and a mounting fixture attached to the case and comprising two opposite end faces, a through bore extending between said end faces for mounting the pressure gauge at the spreader valve or the trigger operated fluid valve of the spray gun, and a passageway other than said through bore, said passageway providing fluid communication between the pressure chamber and the bore, said passageway having an opening on a side wall of said bore; and wherein said valve bushing and said mounting fixture have a mounting position in which said valve bushing has a first section defining a shoulder engaging with one of the opposite end faces of said mounting fixture, a second section located in said bore and extending from the first section towards the other end face of said mounting fixture, and a third section extending from the second section beyond and away from the other end face of said mounting fixture. 2. The kit according to claim 1, wherein a dimension of said case measured in an axial direction of said through bore is greater than an entire axial extent of said through bore. 3. The kit according to claim 1, wherein the pressure chamber is formed as a cavity in said case, an opening of said cavity being closed by a cover so that said pressure chamber is in fluid communication with an outside of said case only through said passageway and said bore. 4. The kit according to claim 1, wherein the pressure chamber is formed as a cavity in said case, an opening of said cavity being closed by a cover, the pressure sensor being sized so as to be passable through the opening of said cavity, but not through said passageway. 5. The kit according to claim 1, wherein, in the mounting position, the second section is radially spaced from the inner wall of said through bore to define between said bushing and the inner wall of said through bore a channel which is in fluid communication with said pressure chamber via said passageway. 6. The kit according to claim 5, wherein a dimension of said case measured in an axial direction of said through bore is greater than an entire axial extent of said through bore. 7. The kit according to claim 1, wherein the mounting fixture and the case are integrated in a single body which extends seamlessly, continuously from said case to said mounting fixture. 8. The kit according to claim 1, wherein the passageway extends obliquely relative to an axial direction of said through bore. 9. The kit according to claim 5, further comprising a needle receivable within and extendable through entire said inner space of said valve bushing. 10. A spray gun, comprising: a valve including a bushing partially received in a bore formed at an end of the gun and a shank received within said bushing; and a retrofittable pressure gauge removably mounted to said gun at said valve, said pressure gauge comprising: a case having a pressure chamber; a pressure sensor located in the pressure chamber; and a mounting fixture which is attached to the case and is not integral with the end of said gun, said mounting fixture having a through bore, wherein the mounting fixture further comprises a passageway other than said through bore, said passageway providing fluid communication between the pressure chamber and the through bore of said mounting fixture; wherein said bushing has a first section passable through the through bore of said mounting fixture and a second section which is not passable through the through bore of said mounting fixture, the first section of said bushing extending through the through bore and said mounting fixture being detachably clamped between said second section of the bushing and said end of the gun. 11. The gun according to claim 10, wherein said passageway has an opening on the inner side wall of said through bore; and an entire axial extent of said through bore is smaller than that of said first section of said bushing. 12. The gun according to claim 11, wherein said first section has a threaded section which is located outside said through bore and engaged with a matching threaded section on an inner wall of the bore in said end of said gun. 13. The gun according to claim 10, wherein said valve is a trigger operated fluid valve; and said bushing is spaced from an inner wall of the bore formed in said end of said gun to define a first channel between the bushing and the inner wall of the bore formed in said end of said gun, said first channel being in fluid communication with a pressurized interior space of said gun, and said first channel being in fluid communication with the pressurized chamber via said passageway. 14. The gun according to claim 13, wherein the first section of said bushing is radially spaced from an inner side wall of the through bore of said mounting fixture to define between said bushing and said inner wall of the through bore a second channel in fluid communication with the pressure chamber via said passageway; said pressurized interior space of said gun being in fluid communication with the pressurized chamber via said first channel, said second channel and said passageway in the recited order. 15. The gun according to claim 10, wherein said mounting fixture is free of threaded attachment to both said bushing and said end of the gun. 16. The gun according to claim 15, comprising a trigger operated shutoff valve and a trigger operated fluid valve which are concentric.
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이 특허에 인용된 특허 (9)
Copp ; Jr. William H. (5 Solomon Pierce Rd. Lexington MA 02173), Automatic spray gun.
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