US3870274A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motor driven valve
Assignee: CHR Nielsens EFTF Armaturfabrik AS
•
Filing: 1973-06-29
•
Granted: 1975-03-11
•
Expires: 1993-06-29
Abstract
Abstract A valve with a motor connected to the valve body for moving the valve body between a closed and an open position wherein the feeding circuit of the motor comprises switches which disconnect the current to the motor when the valve body reaches its closed and its open positions, wherein the motor is a single-phased synchronous motor, having arbitrary directions of rotation and the movements of the valve body past the closed and the open positions are prevented by mechanical stops.
Inventors
- 👤 Max Broe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:51
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/02; F16K31/04
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
325 words
In a motor operated valve of the type that includes a valve housing having a valve seat; a valve body mounted in the housing for movement between an open position and a shut position with respect to the valve seat; a motor mounted on the housing; means for coupling the motor to the valve member for moving the member between the open and the shut positions; first mechanical stop means positioned with respect to the housing for preventing movement of the valve body in one direction past the open position; second mechanical stop means positioned with respect to the housing for preventing movement of the valve body in the opposite direction past the shut position; a first single throw limit switch having one terminal connected to the motor and positioned with respect to the housing for disconnecting current to the motor when the valve body reaches the open position; a second single throw limit switch having one terminal connected to the motor and positioned with respect to the housing for disconnecting current to the motor when the valve body reaches the shut position; and a double throw control switch having a movable contact connectable to a source of electric power, a first fixed contact connected to the other terminal of the first limit switch and a second fixed contact connected to the other terminal of the second limit switch, the improvement wherein: the motor consists of one single-phase, alternating current, synchronous motor having arbitrary directions of rotation that are reversible if rotation in either direction is blocked; the one terminal of the first switch and the one terminal of the second switch are connected to the same motor lead; and the first and second limit switches are positioned for disconnecting current to the motor before the valve body reaches the open and shut positions, respectively, so that the motOr will stop before further movement of the valve body is blocked by the respective stop means.
Claim 2
Dependent Claim
325 words
In a motor operated valve of the type that includes a valve housing having a valve seat; a valve body mounted in the housing for movement between an open position and a shut position with respect to the valve seat; a motor mounted on the housing; means for coupling the motor to the valve member for moving the member between the open and the shut positions; first mechanical stop means positioned with respect to the housing for preventing movement of the valve body in one direction past the open position; second mechanical stop means positioned with respect to the housing for preventing movement of the valve body in the opposite direction past the shut position; a first single throw limit switch having one terminal connected to the motor and positioned with respect to the housing for disconnecting current to the motor when the valve body reaches the open position; a second single throw limit switch having one terminal connected to the motor and positioned with respect to the housing for disconnecting current to the motor when the valve body reaches the shut position; and a double throw control switch having a movable contact connectable to a source of electric power, a first fixed contact connected to the other terminal of the first limit switch and a second fixed contact connected to the other terminal of the second limit switch, the improvement wherein: the motor consists of one single-phase, alternating current, synchronous motor having arbitrary directions of rotation that are reversible if rotation in either direction is blocked; the one terminal of the first switch and the one terminal of the second switch are connected to the same motor lead; and the first and second limit switches are positioned for disconnecting current to the motor before the valve body reaches the open and shut positions, respectively, so that the motOr will stop before further movement of the valve body is blocked by the respective stop means.
Claim 3
Dependent Claim
325 words
In a motor operated valve of the type that includes a valve housing having a valve seat; a valve body mounted in the housing for movement between an open position and a shut position with respect to the valve seat; a motor mounted on the housing; means for coupling the motor to the valve member for moving the member between the open and the shut positions; first mechanical stop means positioned with respect to the housing for preventing movement of the valve body in one direction past the open position; second mechanical stop means positioned with respect to the housing for preventing movement of the valve body in the opposite direction past the shut position; a first single throw limit switch having one terminal connected to the motor and positioned with respect to the housing for disconnecting current to the motor when the valve body reaches the open position; a second single throw limit switch having one terminal connected to the motor and positioned with respect to the housing for disconnecting current to the motor when the valve body reaches the shut position; and a double throw control switch having a movable contact connectable to a source of electric power, a first fixed contact connected to the other terminal of the first limit switch and a second fixed contact connected to the other terminal of the second limit switch, the improvement wherein: the motor consists of one single-phase, alternating current, synchronous motor having arbitrary directions of rotation that are reversible if rotation in either direction is blocked; the one terminal of the first switch and the one terminal of the second switch are connected to the same motor lead; and the first and second limit switches are positioned for disconnecting current to the motor before the valve body reaches the open and shut positions, respectively, so that the motOr will stop before further movement of the valve body is blocked by the respective stop means.
Claim 4
Dependent Claim
325 words
In a motor operated valve of the type that includes a valve housing having a valve seat; a valve body mounted in the housing for movement between an open position and a shut position with respect to the valve seat; a motor mounted on the housing; means for coupling the motor to the valve member for moving the member between the open and the shut positions; first mechanical stop means positioned with respect to the housing for preventing movement of the valve body in one direction past the open position; second mechanical stop means positioned with respect to the housing for preventing movement of the valve body in the opposite direction past the shut position; a first single throw limit switch having one terminal connected to the motor and positioned with respect to the housing for disconnecting current to the motor when the valve body reaches the open position; a second single throw limit switch having one terminal connected to the motor and positioned with respect to the housing for disconnecting current to the motor when the valve body reaches the shut position; and a double throw control switch having a movable contact connectable to a source of electric power, a first fixed contact connected to the other terminal of the first limit switch and a second fixed contact connected to the other terminal of the second limit switch, the improvement wherein: the motor consists of one single-phase, alternating current, synchronous motor having arbitrary directions of rotation that are reversible if rotation in either direction is blocked; the one terminal of the first switch and the one terminal of the second switch are connected to the same motor lead; and the first and second limit switches are positioned for disconnecting current to the motor before the valve body reaches the open and shut positions, respectively, so that the motOr will stop before further movement of the valve body is blocked by the respective stop means.
Claim 5
Dependent Claim
24 words
The motor operated valve of claim 1 further comprising spring means for respectively biasing the first and second limit switches to the closed position.
Claim 6
Dependent Claim
77 words
The motor operated valve of claim 2 further comprising an arm rigidly connected to the valve body for opening the first and second limit switches against the biasing force of the spring means to disconnect the current to the motor before the valve body reaches the open and shut positions, respectively, and for cooperating with at least one of the mechanical stop means for preventing movement of the valve body past the corresponding open or shut position.
Claim 7
Dependent Claim
299 words
A motor driven control valve for a radiator comprising: a valve housing having a valve seat; a valve body mounted in the housing for movement between an open position and a shut position with respect to the valve seat; a single-phase, alternating current, synchronous motor, having arbitrary directions of rotation that are reversible if rotation in either direction is blocked; a gear train engageable with the valve body at a plurality of angular positions relative thereto for coupling the motor to the valve body to move the valve body between the open and shut positions in response to rotation of the motor; an abutment on a gear of the gear train; a first stop means connected to the housing for engaging the abutment on the gear to prevent movement of the valve body in one direction past the open position; an abutment on the valve body; a second stop means mounted in the housing for engaging the abutment on the valve body to prevent movement of the body in the other direction past the shut position; first and second single throw limit switches attached to the housing and having one terminal connected to the motor; a double throw control switch having a movable contact connected to a source of alternating current and first and second fixed contacts connected to the other terminals of the first and second limit switches respectively; first and second actuating members coupled to the valve body for engaging the first and second limit switches to disconnect current to the motor before the valve body reaches the open and shut positions, respectively, the position of the first actuating member relative to the second actuating member being adjustable for changing the amount of movement of the valve body between the first and second limit switch disconnect positions.
Claim 8
Dependent Claim
299 words
A motor driven control valve for a radiator comprising: a valve housing having a valve seat; a valve body mounted in the housing for movement between an open position and a shut position with respect to the valve seat; a single-phase, alternating current, synchronous motor, having arbitrary directions of rotation that are reversible if rotation in either direction is blocked; a gear train engageable with the valve body at a plurality of angular positions relative thereto for coupling the motor to the valve body to move the valve body between the open and shut positions in response to rotation of the motor; an abutment on a gear of the gear train; a first stop means connected to the housing for engaging the abutment on the gear to prevent movement of the valve body in one direction past the open position; an abutment on the valve body; a second stop means mounted in the housing for engaging the abutment on the valve body to prevent movement of the body in the other direction past the shut position; first and second single throw limit switches attached to the housing and having one terminal connected to the motor; a double throw control switch having a movable contact connected to a source of alternating current and first and second fixed contacts connected to the other terminals of the first and second limit switches respectively; first and second actuating members coupled to the valve body for engaging the first and second limit switches to disconnect current to the motor before the valve body reaches the open and shut positions, respectively, the position of the first actuating member relative to the second actuating member being adjustable for changing the amount of movement of the valve body between the first and second limit switch disconnect positions.
Claim 9
Dependent Claim
23 words
The motor operated valve of claim 4 wherein the first and second actuating members are supported by a gear of the gear train.
Claim 10
Dependent Claim
89 words
The motor operated valve of claim 5 wherein one of the actuating members comprises a slotted cam ring frictionally mounted on the gear of the gear train, the ring having a cam for actuating the respective limit switch at a preselected angular position of the gear, and the valve further comprises a locking arm attached to the housing for selective engagement with the slot of the cam ring to hold the cam ring from rotation with the gear ring for adjusting the relative angular position between the actuating members.
Claim 11
Dependent Claim
162 words
The motor operated valve of claim 4 further comprising: a gear box enclosing the gear train; a wheel rotatably mounted in the gear box so that a segment of the wheel projects from the box, the wheel being coupled to the gear train so that it rotates by an angle at least as great as the angle subtended by the segment when the valve body is moved between its open and shut positions; an indicator disc mounted concentrically and in frictional contact with the wheel; and a stop pin mounted on the indicator disc for contacting the side of the gear box at each limit of valve travel, the indicator disc having one marking on one side of the stop pin and a different marking on the other side of the stop pin such that one marking is visible from the outside of the gear box when the valve is shut, And the other marking is visible when the valve is open.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-10 | 1978-09-09 | 1979-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-10 | 1982-09-09 | 1983-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-10 | 1986-09-09 | 1987-03-11 | $7700.00 | Window Closed / Lapsed |