Compressed air throttle device and a powder spray coating device
First Claim
Patent Images
1. A compressed air throttle apparatus, comprising:
- an adjustable throttle valve having a stationary valve element and a displaceable valve element displaceable in an axial direction of the throttle valve relative to the stationary valve element to adjust an opening of the throttle valve;
at least one electrical circuit havingan electrically conductive stationary contacting element mounted on the stationary valve element, andan electrically conductive displaceable contacting element mounted on the displaceable valve element;
a spring disposed between the displaceable contacting element and the stationary valve element, and biasing the displaceable contacting element in the axial direction against the displaceable valve element and away from the stationary contacting element;
a stepping motor for moving the displaceable valve element and the displaceable contacting element in the axial direction relative to the stationary valve element and the stationary contacting element; and
an electrical control coupled to the electrical circuit for receiving a reference electrical signal from the electrical circuit indicating that the stationary and displaceable contacting elements are brought into contact,said electrical control being further coupled to the stepping motor for controlling the motor, while using the reference electrical signal as a reference setting, to adjust the opening of the throttle valve.
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Accused Products
Abstract
A compressed air throttle apparatus has at least one throttle valve adjusted by an electric motor, and an electric circuit fitted with contacting elements to alternatively interrupt and close the electric circuit in relation to the throttle valve settings. This throttle apparatus preferably is applicable to a compressed air path of powder spraycoating equipment.
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Citations
19 Claims
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1. A compressed air throttle apparatus, comprising:
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an adjustable throttle valve having a stationary valve element and a displaceable valve element displaceable in an axial direction of the throttle valve relative to the stationary valve element to adjust an opening of the throttle valve; at least one electrical circuit having an electrically conductive stationary contacting element mounted on the stationary valve element, and an electrically conductive displaceable contacting element mounted on the displaceable valve element; a spring disposed between the displaceable contacting element and the stationary valve element, and biasing the displaceable contacting element in the axial direction against the displaceable valve element and away from the stationary contacting element; a stepping motor for moving the displaceable valve element and the displaceable contacting element in the axial direction relative to the stationary valve element and the stationary contacting element; and an electrical control coupled to the electrical circuit for receiving a reference electrical signal from the electrical circuit indicating that the stationary and displaceable contacting elements are brought into contact, said electrical control being further coupled to the stepping motor for controlling the motor, while using the reference electrical signal as a reference setting, to adjust the opening of the throttle valve. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A compressed air throttle apparatus, comprising:
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an adjustable throttle valve having a stationary valve element and a displaceable valve element displaceable in an axial direction of the throttle valve relative to the stationary valve element to adjust an opening of the throttle valve; at least one electrical circuit having an electrically conductive stationary contacting element mounted on the stationary valve element, and an electrically conductive displaceable contacting element mounted on the displaceable valve element; a stepping motor for moving the displaceable valve element and the displaceable contacting element in the axial direction relative to the stationary valve element and the stationary contacting element; and an electrical control coupled to the electrical circuit for receiving a reference electrical signal from the electrical circuit indicating that the stationary and displaceable contacting elements are brought into contact, said electrical control being further coupled to the stepping motor for controlling the motor, while using the reference electrical signal as a reference setting, to adjust the opening of the throttle valve, wherein the stationary contacting element includes two contacts mutually spaced apart, and the displaceable contacting element is a shunting element for electrically connecting the contacts of the stationary contacting element with each other. - View Dependent Claims (12)
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13. A compressed air throttle apparatus, comprising:
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an adjustable throttle valve having a stationary valve element and a displaceable valve element displaceable in an axial direction of the throttle valve relative to the stationary valve element to adjust an opening of the throttle valve; at least one electrical circuit having an electrically conductive stationary contacting element mounted on the stationary valve element, and an electrically conductive displaceable contacting element mounted on the displaceable valve element; a stepping motor for moving the displaceable valve element and the displaceable contacting element in the axial direction relative to the stationary valve element and the stationary contacting element; and an electrical control coupled to the electrical circuit for receiving a reference electrical signal from the electrical circuit indicating that the stationary and displaceable contacting elements are brought into contact, said electrical control being further coupled to the stepping motor for controlling the motor, while using the reference electrical signal as a reference setting, to adjust the opening of the throttle valve, wherein said circuit includes only one said stationary contacting element, and the displaceable contacting element is fitted with an electrical terminal connected to the electrical control for supplying the electrical control with the reference electrical signal when the stationary and displaceable contacting elements are brought in contact.
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14. Powder spraycoating equipment, comprising:
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a throttle valve having a stationary valve element and a displaceable valve element displaceable in an axial direction of the throttle valve relative to the stationary valve element to adjust an opening of the throttle valve; at least one electrical circuit having an electrically conductive stationary contacting element mounted on the stationary valve element, and an electrically conductive displaceable contacting element mounted on the displaceable valve element; a spring disposed between the displaceable contacting element and the stationary valve element, and biasing the displaceable contacting element in the axial direction against the displaceable valve element and away from the stationary contacting element; a stepping motor for moving the displaceable valve element and the displaceable contacting element in the axial direction relative to the stationary valve element and the stationary contacting element; an electrical control coupled to the electrical circuit for receiving a reference electrical signal from the electrical circuit indicating that the stationary and displaceable contacting elements are brought in contact, said electrical control being further coupled to the stepping motor for controlling the motor, while using the reference electrical signal as a reference setting, to adjust the opening of the throttle valve; and at least one air path for conveying compressed air under control of said throttle valve. - View Dependent Claims (15, 16, 17, 18)
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19. Powder spraycoating equipment, comprising:
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a throttle valve having a stationary valve element and a displaceable valve element displaceable in an axial direction of the throttle valve relative to the stationary valve element to adjust an opening of the throttle valve; at least one electrical circuit having an electrically conductive stationary contacting element mounted on the stationary valve element, and an electrically conductive displaceable contacting element mounted on the displaceable valve element; a stepping motor for moving the displaceable valve element and the displaceable contacting element in the axial direction relative to the stationary valve element and the stationary contacting element; an electrical control coupled to the electrical circuit for receiving a reference electrical signal from the electrical circuit indicating that the stationary and displaceable contacting elements are brought in contact, said electrical control being further coupled to the stepping motor for controlling the motor, while using the reference electrical signal as a reference setting, to adjust the opening of the throttle valve; and at least one air path for conveying compressed air under control of said throttle valve, wherein said circuit includes only one said stationary contacting element, and the displaceable contacting element has an electrical terminal connected to the electrical control for supplying the electrical control with the reference electrical signal when the stationary and displaceable contacting elements are brought in contact.
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Specification