CN204011223U - The operating mechanism of the mutual anti-interlock of three stations - Google Patents
The operating mechanism of the mutual anti-interlock of three stations Download PDFInfo
- Publication number
- CN204011223U CN204011223U CN201420390979.3U CN201420390979U CN204011223U CN 204011223 U CN204011223 U CN 204011223U CN 201420390979 U CN201420390979 U CN 201420390979U CN 204011223 U CN204011223 U CN 204011223U
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- finger
- ground connection
- deep
- slotted chip
- chip breaker
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Abstract
The utility model relates to the operating mechanism of the mutual anti-interlock of a kind of three station, this operating mechanism comprises mounting panel, combined floodgate connecting lever, earthed crank arm, combined floodgate connecting lever, earthed crank arm is provided with the combined floodgate finger through mounting panel near the positive side correspondence of mounting panel, ground connection finger, corresponding mounting panel is provided with combined floodgate finger deep-slotted chip breaker, ground connection finger deep-slotted chip breaker, the back side of mounting panel is flexibly connected the curve disc of rotation by main shaft, the card of curve disc is provided with two section arc grooves crossing with combined floodgate finger deep-slotted chip breaker while rotation, and breach and the curved surface crossing with ground connection finger deep-slotted chip breaker.By the interlock between above-mentioned combined floodgate finger, ground connection finger and combined floodgate finger deep-slotted chip breaker, ground connection finger deep-slotted chip breaker, curve disc, when curve disc is rotate in place, both one lockings wherein of combined floodgate finger, ground connection finger, realize interlocking.It is lower that the utility model is manufactured processing cost, and volume is little, it is easy to maintenance to assemble, and long service life is suitable as high-voltage operating mechanism and uses.
Description
Technical field
The utility model relates to high-voltage operating mechanism, the operating mechanism of the mutual anti-interlock of especially a kind of three station.
Background technology
High-voltage operating mechanism is mainly used for controlling high-voltage switch gear combined floodgate, separating brake, three stations of ground connection, and the mutual anti-interlocking knot of three stations controls the structure of combined floodgate, separating brake, ground connection three station interlockings.So-called interlocking, operating mechanism, in the time of closing position, can not carry out ground connection operation, otherwise, when operating mechanism is during in earthing position, can not carry out closing operation.Thereby ensure the fail safe of high-voltage operating mechanism, prevent from occurring because the misoperations such as secondary combined floodgate cause security incident.Although disclose three a lot of working-position interlock mechanisms both at home and abroad, function is also comparatively perfect, comparatively complicated aspect structure interlock, overall volume is larger, and the cost of manufacturing and assembling is higher, and operation is not long useful life, and maintenance cost is also high.For this reason, need three station linkage lock constructions in existing high-voltage operating mechanism to be improved.
Summary of the invention
For overcoming above-mentioned deficiency, the purpose of this utility model is the operating mechanism that the mutual anti-interlock of a kind of three station is provided to this area, makes that it solves that existing similar mechanism structure is comparatively complicated, manufacture and maintenance cost is high, assembling is not comparatively grown in inconvenience, useful life technical problem.Its objective is and be achieved through the following technical solutions.
The operating mechanism of the mutual anti-interlock of a kind of three station, this operating mechanism comprises combined floodgate actuating part and ground connection actuating part, combined floodgate actuating part and ground connection actuating part are installed on mounting panel front, the actuating part of wherein closing a floodgate comprises closing operation axle, be flexibly connected and be counterrotating combined floodgate connecting lever with closing operation axle, be positioned at combined floodgate connecting lever and be fixedly connected with the combined floodgate interlock connecting lever that closing operation axle is synchronous rotary.Ground connection actuating part comprises ground connection operating axis, be flexibly connected and be counterrotating earthed crank arm with ground connection operating axis, be positioned at earthed crank arm and be fixedly connected with the ground connection interlock connecting lever that ground connection operating axis is synchronous rotary, closing operation axle, the equal activity orientation of ground connection operating axis are in mounting panel.Combined floodgate interlock connecting lever one end is provided with finger, ground connection interlock connecting lever one end is provided with lower finger, between upper finger and lower finger, be connected guide link, guide link two ends are respectively equipped with bar-shaped trough hinged with upper finger, lower finger and that be slidably matched, guide link is socketed with the energy-stored spring that two ends and upper finger, lower finger offset respectively, in the time that upper finger and/or lower finger slide along bar-shaped trough, energy-stored spring is compressed.Interlock connecting lever, earthed crank arm side face are equipped with and adapt to the arc guide barrel that finger slides separately, and in the time that upper finger or lower finger slide into the other end by one end in corresponding arc guide barrel, energy-stored spring completes stored energy operation one time.Its structural feature is:
Described combined floodgate connecting lever is provided with the combined floodgate finger through mounting panel near a side in described mounting panel front, earthed crank arm is provided with the ground connection finger through mounting panel near a side in mounting panel front, corresponding described mounting panel is provided with the combined floodgate finger deep-slotted chip breaker adapting to the finger movement locus that closes a floodgate, and with ground connection finger movement locus adapt to ground connection finger deep-slotted chip breaker, the back side of described mounting panel is flexibly connected the curve disc of a rotation by main shaft, the card of curve disc is provided with two section arc grooves crossing with described combined floodgate finger deep-slotted chip breaker while rotation, and breach and the curved surface crossing with described ground connection finger deep-slotted chip breaker, wherein two section arc grooves are joined and are formed by two sections of deep-slotted chip breakers that are positioned at the non-concentric of same plane and recess direction and are positioned at homonymy, it is curved surface that breach one side extends to described two sections arc groove one end, breach opposite side is the gear edge that stops described ground connection finger.
Interaction relation between curve disc and described combined floodgate finger, ground connection finger, combined floodgate finger deep-slotted chip breaker, ground connection finger deep-slotted chip breaker is: under initial condition, this operating mechanism is positioned at gate-dividing state, described separating brake finger is positioned at the bottom of described separating brake finger deep-slotted chip breaker, and separating brake finger is positioned at described two sections two sections of deep-slotted chip breaker joints of arc groove, described ground connection finger is positioned at the left end of described ground connection finger deep-slotted chip breaker, and ground connection finger and described breach gear offset along side, and now curve disc is in state to be turned; In the time that this operating mechanism switches to ground state by gate-dividing state, described ground connection finger slides into right-hand member by the left end of ground connection finger deep-slotted chip breaker, and promote described breach and drive curve disc to rotate, described separating brake finger is slid into the end of right section of deep-slotted chip breaker by two sections of deep-slotted chip breaker joints, separating brake finger is positioned at the bottom of separating brake finger deep-slotted chip breaker, now separating brake finger locking; In the time that this operating mechanism switches to "on" position by gate-dividing state, described separating brake finger slides into top by separating brake finger deep-slotted chip breaker bottom, separating brake finger is slid into the end of left section of deep-slotted chip breaker by described two sections two sections of deep-slotted chip breaker joints of arc groove, described curve disc turns to described curved surface described ground connection finger is limited in the left end of ground connection finger deep-slotted chip breaker, ground connection finger locking.
Described mounting panel is provided with the positive stop to described combined floodgate connecting lever, earthed crank arm rotary spacing, and positive stop is flexible block.Make to close a floodgate by this positive stop and reduce and clash into and vibration when connecting lever, earthed crank arm rotate in place, improve the reliability of mechanism.
The actuating method of the operating mechanism of the mutual anti-interlock of this three station is: under initial condition, this operating mechanism is positioned at gate-dividing state, in the time that this operating mechanism switches to "on" position by gate-dividing state, rotate described closing operation axle, the interlock connecting lever that closes a floodgate rotates and drives described upper finger to slide into the other end along the arc guide barrel of combined floodgate connecting lever by one end, in this process, upper finger compresses described energy-stored spring and realizes energy storage, in the time that upper finger slip puts in place, energy-stored spring is changed into and is released energy by energy storage, in promotion, finger drives described combined floodgate connecting lever to rotate and realizes closing operation, in closing operation process, the combined floodgate finger of combined floodgate connecting lever slides into top by the low side of the finger deep-slotted chip breaker that closes a floodgate, this combined floodgate finger is slid into the end of left section of deep-slotted chip breaker of two section arc groove by described two sections deep-slotted chip breaker intersection, arc groove two ends simultaneously, combined floodgate finger drives curve disc to rotate, the curved surface of curve disc is limited in described ground connection finger the left end of ground connection finger deep-slotted chip breaker, now ground connection finger locking, cannot operational grounding operating axis.When described in operation to opposite direction when closing operation axle, this operating mechanism returns to gate-dividing state.In the time that this operating mechanism switches to ground state by gate-dividing state, rotate described ground connection operating axis, ground connection interlock connecting lever rotates and drives described lower finger to slide into the other end along the arc guide barrel of earthed crank arm by one end, in this process, lower finger compresses described energy-stored spring and realizes energy storage, instantly finger slides while putting in place, energy-stored spring is changed into and is released energy by energy storage, promoting lower finger drives described earthed crank arm rotation to be grounded operation, in ground connection operating process, the ground connection finger of earthed crank arm slides into right-hand member by the left end of ground connection finger deep-slotted chip breaker, and ground connection finger embeds in the breach of described curve disc, ground connection finger drives curve disc to rotate, described combined floodgate finger is slid into the end of right section of deep-slotted chip breaker of two section arc groove by two sections of deep-slotted chip breaker intersections of two sections of arc grooves, finger locking now closes a floodgate, cannot rotate closing operation axle.
Compared with prior art, the utility model improves and optimizes three station actuating structures of combined floodgate, separating brake, ground connection, make switching-on mechanism and earthing mechanism keep higher consistency, thereby needn't be separately that combined floodgate or earthing mechanism design respectively, save manufacturing cost, I& M operates more for convenience, longer service life.In addition, the utility model has only adopted an energy-stored spring, and the energy storage and energy release that can realize combined floodgate, separating brake, ground connection three stations is switched, and not only operation is reliable, and more flexible.The three station linkage lock constructions that the utility model is suitable as all kinds of high-voltage operating mechanisms use, or the architecture advances of like product.
Brief description of the drawings
Fig. 1 is the Facad structure schematic diagram of the utility model gate-dividing state.
Fig. 2 is the structure schematic diagram of the utility model gate-dividing state.
Fig. 3 is the Facad structure schematic diagram of the utility model ground state.
Fig. 4 is the structure schematic diagram of the utility model ground state.
Fig. 5 is the Facad structure schematic diagram of the utility model "on" position.
Fig. 6 is the structure schematic diagram of the utility model "on" position.
In figure, the name of sequence number is called: 1, mounting panel, 101, combined floodgate finger deep-slotted chip breaker, 102, ground connection finger deep-slotted chip breaker, 2, closing operation axle, 3, combined floodgate connecting lever, 301, arc guide barrel, 302, combined floodgate finger, 4, interlock connecting lever closes a floodgate, 5, upper finger, 6, energy-stored spring, 7, guide link, 701, bar-shaped trough, 8, ground connection operating axis, 9, earthed crank arm, 901, arc guide barrel, 902, ground connection finger, 10, ground connection interlock connecting lever, 11, lower finger, 12, positive stop, 13, main shaft, 14, curve disc, 1401, curved surface, 1402, breach, 1403, two sections of arc grooves.
Embodiment
Now by reference to the accompanying drawings, the utility model is further described.
As shown in Fig. 1～6, the operating mechanism of the mutual anti-interlock of this three station is to be installed on mounting panel 1, it comprises combined floodgate actuating part and ground connection actuating part, combined floodgate actuating part comprises closing operation axle 2, be flexibly connected with closing operation axle and be counterrotating combined floodgate connecting lever 3, be positioned at combined floodgate connecting lever and be fixedly connected with the combined floodgate interlock connecting lever 4 that closing operation axle is synchronous rotary, ground connection actuating part comprises ground connection operating axis 8, be flexibly connected with ground connection operating axis and be counterrotating earthed crank arm 9, be positioned at earthed crank arm and be fixedly connected with the ground connection interlock connecting lever 20 that ground connection operating axis is synchronous rotary, closing operation axle, the equal activity orientation of ground connection operating axis is in mounting panel, mounting panel is provided with combined floodgate connecting lever, the positive stop 12 of earthed crank arm limit rotation.The upper finger 5 of interlock connecting lever one end connection closes a floodgate, ground connection interlock connecting lever one end connects lower finger 11, between upper finger and lower finger, be connected guide link 7, guide link two ends are respectively equipped with bar-shaped trough 701 hinged with upper finger, lower finger and that be slidably matched, guide link is socketed with the energy-stored spring 6 that two ends and upper finger, lower finger offset respectively, in the time that upper finger and/or lower finger slide along bar-shaped trough, energy-stored spring is compressed.Interlock connecting lever, earthed crank arm side face are equipped with and adapt to the arc guide barrel 301,901 that finger slides separately, and in the time that upper finger or lower finger slide into the other end by one end in corresponding arc guide barrel, energy-stored spring completes stored energy operation one time.
Main design of the present utility model is to state combined floodgate connecting lever and is provided with the combined floodgate finger 302 through mounting panel near a side in described mounting panel front, earthed crank arm is provided with the ground connection finger 902 through mounting panel near a side in mounting panel front, corresponding mounting panel is provided with the combined floodgate finger deep-slotted chip breaker 101 adapting to the finger movement locus that closes a floodgate, and the ground connection finger deep-slotted chip breaker 102 adapting to ground connection finger movement locus.The back side of mounting panel is flexibly connected the curve disc 14 of a rotation by main shaft 13, the card of curve disc is provided with two section arc grooves 1403 crossing with combined floodgate finger deep-slotted chip breaker while rotation, and the breach 1402 crossing with ground connection finger deep-slotted chip breaker and curved surface 1401, wherein two section arc grooves are joined and are formed by two sections of deep-slotted chip breakers that are positioned at the non-concentric of same plane and recess direction and are positioned at homonymy, it is curved surface that breach one side extends to two sections arc groove one end, and breach opposite side is the gear edge that stops ground connection finger.
Interaction relation between above-mentioned curve disc and combined floodgate finger, ground connection finger, combined floodgate finger deep-slotted chip breaker, ground connection finger deep-slotted chip breaker is: under initial condition, this operating mechanism is positioned at the gate-dividing state shown in Fig. 1, Fig. 2, separating brake finger is positioned at the bottom of separating brake finger deep-slotted chip breaker, and separating brake finger is positioned at two sections two sections of deep-slotted chip breaker joints of arc groove, ground connection finger is positioned at the left end of ground connection finger deep-slotted chip breaker, and ground connection finger and breach gear offset along side, and now curve disc is in state to be turned.In the time that this operating mechanism switches to ground state by gate-dividing state, as shown in Figure 3, Figure 4, ground connection finger slides into right-hand member by the left end of ground connection finger deep-slotted chip breaker, and promote breach drive curve disc rotate, separating brake finger is slid into the end of right section of deep-slotted chip breaker by two sections of deep-slotted chip breaker joints, separating brake finger is positioned at the bottom of separating brake finger deep-slotted chip breaker, now separating brake finger locking.In the time that this operating mechanism switches to "on" position by gate-dividing state, as shown in Figure 5, Figure 6, separating brake finger slides into top by separating brake finger deep-slotted chip breaker bottom, separating brake finger is slid into the end of left section of deep-slotted chip breaker by two sections of deep-slotted chip breaker joints of two sections of arc grooves, curve disc is rotated, until curved surface is limited in ground connection finger the left end of ground connection finger deep-slotted chip breaker, ground connection finger locking.
Based on said structure, the interlocking process of this operating mechanism is: under initial condition, this operating mechanism is positioned at the gate-dividing state shown in Fig. 1, Fig. 2.In the time that this operating mechanism switches to "on" position by gate-dividing state, rotate closing operation axle, the interlock connecting lever that closes a floodgate rotates and drives upper finger to slide into the other end along the arc guide barrel of combined floodgate connecting lever by one end, in this process, upper finger compresses energy-stored spring and realizes energy storage, in the time that upper finger slip puts in place, energy-stored spring is changed into and is released energy by energy storage, and in promotion, finger drives combined floodgate connecting lever to rotate and realizes closing operation.In closing operation process, the combined floodgate finger of combined floodgate connecting lever slides into top by the low side of the finger deep-slotted chip breaker that closes a floodgate, this combined floodgate finger is slid into the end of left section of deep-slotted chip breaker of two section arc groove by deep-slotted chip breaker intersection, two sections of arc groove two ends simultaneously, combined floodgate finger drives curve disc to rotate, the curved surface of curve disc is limited in ground connection finger the left end of ground connection finger deep-slotted chip breaker, now ground connection finger locking, cannot operational grounding operating axis, realizes interlocking.In the time of operation to opposite direction closing operation axle, this operating mechanism returns to gate-dividing state.In the time that this operating mechanism switches to ground state by gate-dividing state, rotate ground connection operating axis, ground connection interlock connecting lever rotates and drives lower finger to slide into the other end along the arc guide barrel of earthed crank arm by one end, in this process, lower finger compresses energy-stored spring and realizes energy storage, instantly finger slides while putting in place, energy-stored spring is changed into and is released energy by energy storage, promoting lower finger drives earthed crank arm rotation to be grounded operation, in ground connection operating process, the ground connection finger of earthed crank arm slides into right-hand member by the left end of ground connection finger deep-slotted chip breaker, and ground connection finger embeds in the breach of curve disc, ground connection finger drives curve disc to rotate, combined floodgate finger is slid into the end of right section of deep-slotted chip breaker of two section arc groove by two sections of deep-slotted chip breaker intersections of two sections of arc grooves, finger locking now closes a floodgate, cannot rotate closing operation axle, realize interlocking.
Above content is intended to illustrate technological means of the present utility model, and unrestricted technical scope of the present utility model.Those skilled in the art do apparent improvement in conjunction with existing common practise to the utility model, within also falling into the protection range of the utility model claim.
Claims (2)
1. the operating mechanism of the mutual anti-interlock of station, this operating mechanism comprises combined floodgate actuating part and ground connection actuating part, combined floodgate actuating part and ground connection actuating part are installed on mounting panel (1) front, the actuating part of wherein closing a floodgate comprises closing operation axle (2), be flexibly connected with closing operation axle and be counterrotating combined floodgate connecting lever (3), be positioned at combined floodgate connecting lever and be fixedly connected with the combined floodgate interlock connecting lever (4) that closing operation axle is synchronous rotary, ground connection actuating part comprises ground connection operating axis (8), be flexibly connected with ground connection operating axis and be counterrotating earthed crank arm (9), be positioned at earthed crank arm and be fixedly connected with the ground connection interlock connecting lever (10) that ground connection operating axis is synchronous rotary, closing operation axle, the equal activity orientation of ground connection operating axis is in mounting panel, combined floodgate interlock connecting lever one end is provided with finger (5), ground connection interlock connecting lever one end is provided with lower finger (11), between upper finger and lower finger, be connected guide link (7), guide link two ends are respectively equipped with bar-shaped trough (701) hinged with upper finger, lower finger and that be slidably matched, guide link is socketed with the energy-stored spring (6) that two ends and upper finger, lower finger offset respectively, in the time that upper finger and/or lower finger slide along bar-shaped trough, energy-stored spring is compressed, interlock connecting lever, earthed crank arm side face are equipped with and adapt to the arc guide barrel (301,901) that finger slides separately, and in the time that upper finger or lower finger slide into the other end by one end in corresponding arc guide barrel, energy-stored spring completes stored energy operation one time, it is characterized in that:
Described combined floodgate connecting lever (3) is provided with the combined floodgate finger (302) through mounting panel near the positive side of described mounting panel (1), earthed crank arm (9) is provided with the ground connection finger (902) through mounting panel near a side in mounting panel front, corresponding described mounting panel is provided with the combined floodgate finger deep-slotted chip breaker (101) adapting to the finger movement locus that closes a floodgate, and with ground connection finger movement locus adapt to ground connection finger deep-slotted chip breaker (102), the back side of described mounting panel is flexibly connected the curve disc (14) of a rotation by main shaft (13), the card of curve disc is provided with two section arc grooves (1403) crossing with described combined floodgate finger deep-slotted chip breaker while rotation, and the breach (1402) crossing with described ground connection finger deep-slotted chip breaker and curved surface (1401), wherein two section arc grooves are joined and are formed by two sections of deep-slotted chip breakers that are positioned at the non-concentric of same plane and recess direction and are positioned at homonymy, it is curved surface that breach one side extends to described two sections arc groove one end, breach opposite side is the gear edge that stops described ground connection finger,
Interaction relation between curve disc and described combined floodgate finger, ground connection finger, combined floodgate finger deep-slotted chip breaker, ground connection finger deep-slotted chip breaker is: under initial condition, this operating mechanism is positioned at gate-dividing state, described separating brake finger is positioned at the bottom of described separating brake finger deep-slotted chip breaker, and separating brake finger is positioned at described two sections two sections of deep-slotted chip breaker joints of arc groove, described ground connection finger is positioned at the left end of described ground connection finger deep-slotted chip breaker, and ground connection finger and described breach gear offset along side, and now curve disc is in state to be turned; In the time that this operating mechanism switches to ground state by gate-dividing state, described ground connection finger slides into right-hand member by the left end of ground connection finger deep-slotted chip breaker, and promote described breach and drive curve disc to rotate, described separating brake finger is slid into the end of right section of deep-slotted chip breaker by two sections of deep-slotted chip breaker joints, separating brake finger is positioned at the bottom of separating brake finger deep-slotted chip breaker, now separating brake finger locking; In the time that this operating mechanism switches to "on" position by gate-dividing state, described separating brake finger slides into top by separating brake finger deep-slotted chip breaker bottom, separating brake finger is slid into the end of left section of deep-slotted chip breaker by described two sections two sections of deep-slotted chip breaker joints of arc groove, described curve disc turns to described curved surface described ground connection finger is limited in the left end of ground connection finger deep-slotted chip breaker, ground connection finger locking.
2. the operating mechanism of the mutual anti-interlock of three station according to claim 1, is characterized in that described mounting panel (1) is provided with the positive stop (12) to described combined floodgate connecting lever (3), earthed crank arm (9) rotary spacing, and positive stop is flexible block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420390979.3U CN204011223U (en) | 2014-07-15 | 2014-07-15 | The operating mechanism of the mutual anti-interlock of three stations |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420390979.3U CN204011223U (en) | 2014-07-15 | 2014-07-15 | The operating mechanism of the mutual anti-interlock of three stations |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204011223U true CN204011223U (en) | 2014-12-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420390979.3U Withdrawn - After Issue CN204011223U (en) | 2014-07-15 | 2014-07-15 | The operating mechanism of the mutual anti-interlock of three stations |
Country Status (1)
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| CN (1) | CN204011223U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104143463A (en) * | 2014-07-15 | 2014-11-12 | 胡光福 | Operating mechanism and operating method for three-position mutual protection interlocking structure |
| CN107833780A (en) * | 2017-12-06 | 2018-03-23 | 上海劲变电气制造有限公司 | Anti-mistaken interlocking device used for high-voltage switch |
| CN109509652A (en) * | 2017-09-14 | 2019-03-22 | 许继电气股份有限公司 | Breaker-three-station device and breaker and three-station interlock |
-
2014
- 2014-07-15 CN CN201420390979.3U patent/CN204011223U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104143463A (en) * | 2014-07-15 | 2014-11-12 | 胡光福 | Operating mechanism and operating method for three-position mutual protection interlocking structure |
| CN109509652A (en) * | 2017-09-14 | 2019-03-22 | 许继电气股份有限公司 | Breaker-three-station device and breaker and three-station interlock |
| CN109509652B (en) * | 2017-09-14 | 2019-12-20 | 许继电气股份有限公司 | Circuit breaker-three-position switch device and circuit breaker and three-position switch interlocking device |
| CN107833780A (en) * | 2017-12-06 | 2018-03-23 | 上海劲变电气制造有限公司 | Anti-mistaken interlocking device used for high-voltage switch |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20141210 Effective date of abandoning: 20160413 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |