CN202443919U - DC (direct current) contactor - Google Patents
DC (direct current) contactor Download PDFInfo
- Publication number
- CN202443919U CN202443919U CN2012200814326U CN201220081432U CN202443919U CN 202443919 U CN202443919 U CN 202443919U CN 2012200814326 U CN2012200814326 U CN 2012200814326U CN 201220081432 U CN201220081432 U CN 201220081432U CN 202443919 U CN202443919 U CN 202443919U
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- loam cake
- base
- spring
- contactor
- screw
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Abstract
The utility model discloses a DC (direct current) contactor, which comprises a protective shell consisting of a base and an upper cover and provided with an accommodating cavity, an electromagnetic assembly arranged in the accommodating cavity, and a binding post arranged on the upper cover, wherein the lower surface of the upper cover is provided with an annular groove, the top end of the base is positioned in the annular groove, and a rubber sealing ring is arranged between the bottom wall of the annular groove and the side wall of the top end of the base; the bottom end of the binding post extends out of the lower surface of the upper cover into the accommodating cavity and is positioned at the inner side of the annular groove, and the top end of the binding post extends out of the upper surface of the upper cover; the upper surface of the upper cover is an arc-shaped surface or conical surface bulged upwards, and the outer side of the annular groove is provided with a drainage baffle bulged downwards; the top end of the base is provided with a sealed annular bulge bulged outwards; and the annular bulge is positioned in the annular groove. Compared with the conventional DC contactor, the DC contactor with the structure has superior waterproofness and is low in cost.
Description
Technical field
The utility model belongs to the contactor construction design field, is specifically related to the good D.C. contactor of a kind of water resistance.
Background technology
D.C. contactor is a kind ofly to control the electromagnetic switch of big current switching through little current switching, and its operation principle is: after energising under the effect of coil at little electric current of contactor, coil produces magnetic field; Thereby pass through the effect conducting or the disconnection major loop of the electromagnetic force of coil magnetic field generation, promptly moving contact contacts with fixed contact and realizes conducting, and moving contact does not contact with fixed contact and realizes cutting off the power supply, to reach the purpose of the big electric current of little Current Control.D.C. contactor mainly is made up of electromagnetic system (iron core, fixed core, solenoid), contact system (normally open contact and normally closed interlock) and arc quenching system.
In order to cater to the demand of special occasions, the function that contactor generally needs anti-trickle, soaks in short-term.The waterproof measure that the tradition contactor adopts mainly contains three kinds, the mode that promptly adopts metal sealing by fusing, sealed with brazing and rubber ring to block, and the cost of right metal sealing by fusing and sealed with brazing is higher relatively, production efficiency is low; The reliability that rubber ring blocks is not high, occurs local immersion phenomenon easily.
Summary of the invention
The purpose of the utility model provides a kind of with low cost and water resistance superior direct current contactor.
The technical scheme that realizes the utility model purpose is:
A kind of D.C. contactor comprises the protection housing with containing cavity be made up of base and loam cake, is arranged on the electromagnetic assembly in the containing cavity and is arranged on the binding post that covers; The lower surface of said loam cake is provided with annular recess, and the top of said base is arranged in annular recess, is provided with rubber seal between limit, the top wall of the diapire of said annular recess and said base; The lower surface that loam cake is stretched out in the bottom of said binding post is to containing cavity and be positioned at the inboard of annular recess, and the upper surface of loam cake is stretched out on its top; The upper surface of said loam cake is arcwall face or the taper surface that raises up, and the outside of said annular recess is provided with the drainage baffle plate of downward protrusion; The top of said base outwards convexes with the annular projection of sealing; Said annular projection is arranged in said annular recess.
In the technique scheme, the exit that the upper surface of said loam cake also is provided with binding post when being used to prevent loam cake upper surface ponding is because of the be short-circuited insulating barrier of conducting of the electric action of rainwater; Said binding post is distributed in the both sides of said insulating barrier.
In the technique scheme, the quantity of said insulating barrier is one and is arranged on the middle part of said loam cake; Said binding post comprises input terminal and outlet terminal, and each two of the quantity of said input terminal and outlet terminal respectively are provided with an input terminal and an outlet terminal on the last cover upper surface of the left and right sides of said insulating barrier.
In the technique scheme, said annular recess comprises seal groove district and the link slot district that is communicated with the seal groove district; The width in said link slot district is greater than the width in seal groove district, and said rubber seal is positioned at the seal groove district, and the top of said base is positioned at the link slot district and rubber seal is pressed on the seal groove district.
In the technique scheme, also comprise being used for screw that loam cake and base are fixed together; Cover on said and be provided with shoulder hole, said base is provided with screw, and the screw that the double-screw bolt of said screw passes on shoulder hole and the base is spirally connected, and the nut of screw is arranged in shoulder hole, and the gap between nut and the shoulder hole is through the casting glue embedding.
In the technique scheme, this D.C. contactor also comprises the erection support that is used for himself being installed on the external equipment; Said erection support comprises and protection housing first connecting portion that is fixedly connected and second connecting portion that is fixedly connected with external equipment; Said first connecting portion passes through screw on the base of protection housing; Said second connecting portion is provided with the fixed installation hole that is used for fixing on external equipment.
In the technique scheme, the L shaped erection support that said erection support is made up of first connecting portion and second connecting portion; The quantity of said erection support is two and is separately positioned on the relative both sides of protection housing.
In the technique scheme, said electromagnetic assembly comprises the coil rack that is provided with slide opening, be wound on solenoid on the coil rack, be arranged in the core bar of slide opening, be set in iron core, push rod, lining, slide block and spring base, back-moving spring and touch spring on the core bar from bottom to top successively; The top of said back-moving spring is against and covers, and its bottom is against on the spring base; The top of said touch spring is against on the slide block, and its bottom is against on the lining; The bottom of said outlet terminal is provided with fixed contact, and the top of said slide block is provided with moving contact; Said lining comprises blocking part and sliding part, and said slide block can move back and forth on sliding part, and the top of said touch spring is against on the lower surface of slide block, and its bottom is against on the blocking part of lining; Said touch spring is the steel spring leaf.
In the technique scheme, said back-moving spring is a helical form compression spring; Relevant position on the top of said spring base and the lower surface of loam cake is provided with groove, and the upper and lower side of said back-moving spring lays respectively in the respective slot.
The utlity model has positive effect:
(1) upper surface of the D.C. contactor in the utility model protection housing through the loam cake arcwall face or the taper surface that are set to raise up, and, be outward extended with annular projection on the top of base at the arranged outside drainage baffle plate of annular recess; Said annular projection is arranged in said annular recess; Be designed to this structure; D.C. contactor is when vertical the installation, and rainwater drenches at last cap surface, and current flow away along arc or conical surfaces; When the rubber seal of flowing through blocked the junction, current disengaged cap surface on the device under the effect of drainage baffle plate; But when the contactor level is installed; To overflow all around, when the rubber seal of flowing through blocked the faying face place, current were breaking away from the protection housing under the effect of annular projection and gravity current along the containment vessel surface; Thereby the protection contactor is not by water logging, and having better waterproof can; Also save simultaneously the great number cost when adopting conventional method to carry out waterproof measure, reduced input cost.
(2) exit that through the upper surface of loam cake at the protection housing insulating barrier is set and binding post is arranged on its both sides binding post when preventing loam cake upper surface ponding of the D.C. contactor in the utility model is because of the conducting that is short-circuited of the electric action of rainwater; Avoid the generation of potential safety hazard, have good protection effect.
(3) D.C. contactor in the utility model through screw together with loam cake and base relative fixed, and employing casting glue embedding in the gap between screw nut and shoulder hole, thus avoided getting into containing cavity the shoulder hole of current along screw from loam cake.
(4) touch spring in the utility model adopts the steel spring leaf to replace tradition to use spring wire to effectively reduce height dimension.
Description of drawings
Fig. 1 is a kind of structural representation of D.C. contactor in the utility model;
Fig. 2 is that Fig. 1 is from a kind of forward view of A to observation;
A kind of full sectional view that Fig. 3 dissects along the B-B line for Fig. 1;
Fig. 4 is a kind of local enlarged diagram at C place among Fig. 3;
Fig. 5 is a kind of local enlarged diagram at D place among Fig. 3;
Reference numeral shown in the figure is: 1-protects housing; The 11-containing cavity; The 12-base; The 13-loam cake; The upper surface of 131-loam cake; The 14-annular recess; 141-seal groove district; 142-link slot district; 15-drainage baffle plate; The 16-annular projection; The 17-insulating barrier; The 18-screw; The 2-electromagnetic assembly; The 21-solenoid; The 22-core bar; The 23-iron core; The 24-push rod; The 25-lining; The 251-blocking part; The 252-sliding part; The 26-slide block; The 27-spring base; The 28-back-moving spring; The 29-touch spring; The 31-input terminal; The 32-outlet terminal; The 4-rubber seal; The 5-erection support; 51-first connecting portion; 52-second connecting portion; The 6-casting glue.
Embodiment
(embodiment 1)
Fig. 1 to Fig. 5 has shown a kind of embodiment of the utility model.Wherein, Fig. 1 is a kind of structural representation of D.C. contactor in the utility model; Fig. 2 is that Fig. 1 is from a kind of forward view of A to observation; A kind of full sectional view that Fig. 3 dissects along the B-B line for Fig. 1; Fig. 4 is a kind of local enlarged diagram at C place among Fig. 3; Fig. 5 is a kind of local enlarged diagram at D place among Fig. 3.
A kind of D.C. contactor, as shown in figures 1 and 3, comprise the protection housing 1 formed by base 12 and loam cake 13, be arranged on the electromagnetic assembly 2 in the containing cavity 11 and be arranged on the binding post on the loam cake 12 with containing cavity 11; Said base 12 is fixed together through screw 18 with loam cake 13; Said loam cake 13 is provided with shoulder hole 19; Said base 12 is provided with screw, and the screw that the double-screw bolt of said screw 18 passes on shoulder hole and the base 12 is spirally connected, and the nut of screw 18 is arranged in shoulder hole; Gap between nut and the shoulder hole is through casting glue 6 embeddings, and is as shown in Figure 2.The lower surface of said loam cake 13 is provided with annular recess 14, and the top of said base 12 is arranged in annular recess 14, is provided with rubber seal 4 between limit, the top wall of the diapire of said annular recess 14 and said base 12; The bottom of said binding post is stretched out in lower surface to the containing cavity 11 of loam cake 12 and is positioned at the inboard of annular recess 14, and the upper surface 131 of loam cake 13 is stretched out on its top; In the present embodiment, the arcwall face of upper surface 131 for raising up of said loam cake 13 also can be made as the upper surface 131 of loam cake 13 taper surface that raises up in practice; The outside of said annular recess 14 is provided with the drainage baffle plate 15 of downward protrusion; The top of said base 12 outwards convexes with the annular projection 16 of sealing; Said annular projection 16 is arranged in said annular recess 14; The lower surface of said annular projection 16 is higher than the lower surface of drainage baffle plate 15.
Like Fig. 3 and shown in Figure 5, said electromagnetic assembly 2 comprises the coil rack that is provided with slide opening, be wound on solenoid 21 on the coil rack, be arranged in the core bar 22 of slide opening, be set in iron core 23, push rod 24, lining 25, slide block 26 and spring base 27, back-moving spring 28 and touch spring 29 on the core bar from bottom to top successively; The top of said back-moving spring 29 is against on the loam cake 12, and its bottom is against on the spring base 27; The top of said touch spring 29 is against on the slide block 26, and its bottom is against on the lining 25; The bottom of said outlet terminal 31 is provided with fixed contact, and the top of said slide block 26 is provided with moving contact; Said lining 25 comprises blocking part 251 and sliding part 252, and said slide block 26 can move back and forth on sliding part 252, and the top of said touch spring 29 is against on the lower surface of slide block 26, and its bottom is against on the blocking part of lining 25; Said touch spring 29 is the steel spring leaf; In the present embodiment, adopt the steel spring leaf to replace tradition to use spring wire to effectively reduce height dimension.
Said back-moving spring 28 is helical form compression spring; Relevant position on the lower surface of the top of said spring base 27 and loam cake 12 is provided with groove, and the upper and lower side of said back-moving spring 28 lays respectively in the respective slot, adopts this structure to prevent that back-moving spring 28 from misplacing, and is as shown in Figure 3.
The exit that the upper surface 131 of said loam cake 13 also is provided with binding post when being used to prevent loam cake 13 upper surfaces 131 ponding is because of the be short-circuited insulating barrier 17 of conducting of the electric action of rainwater; Said binding post is distributed in the both sides of said insulating barrier 17; Said insulating barrier 17 connects the upper surface 131 of loam cake 13, and is as shown in Figure 1.
The quantity of said insulating barrier 17 is one and is arranged on the middle part of said loam cake 13; Said binding post comprises input terminal 31 and outlet terminal 32, each two of the quantity of said input terminal 31 and outlet terminal 32; Respectively be provided with an input terminal 31 and an outlet terminal 32 on loam cake 13 upper surfaces 131 of the left and right sides of said insulating barrier 17; As depicted in figs. 1 and 2; The end face of said insulating barrier 17 is an arcwall face, and the setting of insulating barrier 17 can effectively be blocked between two binding posts possibly have good protective action owing to rainwater conducts the short circuit that takes place.
As shown in Figure 4, said annular recess 14 comprises seal groove district 141 and the link slot district 142 that is communicated with seal groove district 141; The width in said link slot district 142 is greater than the width in seal groove district 141, and said rubber seal 4 is positioned at seal groove district 141, and the top of said base 12 is positioned at link slot district 142 and rubber seal 4 is pressed on seal groove district 141.
This D.C. contactor also comprises the erection support 5 that is used for himself being installed on the external equipment; Said erection support 5 comprises and protection housing 1 first connecting portion 51 that is fixedly connected and second connecting portion 52 that is fixedly connected with external equipment; Said first connecting portion 51 passes through screw on the base 12 of protection housing 1; Said second connecting portion 52 is provided with the fixed installation hole that is used for fixing on external equipment.The L shaped erection support 5 that said erection support 5 is made up of first connecting portion 51 and second connecting portion 52; The quantity of said erection support 5 is two and is separately positioned on protection housing 1 relative both sides.
The advantage that present embodiment has is:
(1) upper surface of the D.C. contactor among embodiment protection housing through the loam cake arcwall face or the taper surface that are set to raise up, and, be outward extended with annular projection on the top of base at the arranged outside drainage baffle plate of annular recess; Said annular projection is arranged in said annular recess; Be designed to this structure; D.C. contactor is when vertical the installation, and rainwater drenches at last cap surface, and current flow away along arc or conical surfaces; When the rubber seal of flowing through blocked the junction, current disengaged cap surface on the device under the effect of drainage baffle plate; But when the contactor level is installed; To overflow all around, when the rubber seal of flowing through blocked the faying face place, current were breaking away from the protection housing under the effect of annular projection and gravity current along the containment vessel surface; Thereby the protection contactor is not by water logging, and having better waterproof can; Also save simultaneously the great number cost when adopting conventional method to carry out waterproof measure, reduced input cost.
(2) exit that through the upper surface of loam cake at the protection housing insulating barrier is set and binding post is arranged on its both sides binding post when preventing loam cake upper surface ponding of the D.C. contactor among the embodiment is because of the conducting that is short-circuited of the electric action of rainwater; Avoid the generation of potential safety hazard, have good protection effect.
(3) D.C. contactor among the embodiment through screw together with loam cake and base relative fixed, and employing casting glue embedding in the gap between screw nut and shoulder hole, thus avoided current to get into the containing cavity along screw from shoulder hole.
(4) touch spring in the present embodiment adopts the steel spring leaf to replace tradition to use spring wire to effectively reduce height dimension.
Obviously, the foregoing description of the utility model only be for explain clearly that the utility model does for example, and be not to be qualification to the execution mode of the utility model.For the those of ordinary skill in affiliated field, on the basis of above-mentioned explanation, can also make other multi-form variation or change.Here need not also can't give exhaustive to all execution modes.And conspicuous variation that these connotations that belong to the utility model are extended out or change still belong to the protection range of the utility model.
Claims (9)
1. D.C. contactor comprises the protection housing (1) with containing cavity (11) be made up of base (12) and loam cake (13), is arranged on the electromagnetic assembly (2) in the containing cavity (11) and is arranged on the binding post on the loam cake (12); The lower surface of said loam cake (13) is provided with annular recess (14), and the top of said base (12) is arranged in annular recess (14), is provided with rubber seal (4) between limit, the top wall of the diapire of said annular recess (14) and said base (12); The bottom of said binding post is stretched out in lower surface to the containing cavity (11) of loam cake (12) and is positioned at the inboard of annular recess (14), and the upper surface (131) of loam cake (13) is stretched out on its top;
It is characterized in that: arcwall face or the taper surface of the upper surface (131) of said loam cake (13) for raising up, the outside of said annular recess (14) is provided with the drainage baffle plate (15) of downward protrusion; The top of said base (12) outwards convexes with the annular projection (16) of sealing; Said annular projection (16) is arranged in said annular recess (14).
2. D.C. contactor according to claim 1 is characterized in that: the exit that the upper surface (131) of said loam cake (13) also is provided with binding post when being used to prevent loam cake (13) upper surface (131) ponding is because of the be short-circuited insulating barrier (17) of conducting of the electric action of rainwater; Said binding post is distributed in the both sides of said insulating barrier (17).
3. D.C. contactor according to claim 2 is characterized in that: the quantity of said insulating barrier (17) is one and is arranged on the middle part of said loam cake (13); Said binding post comprises input terminal (31) and outlet terminal (32); Each two of the quantity of said input terminal (31) and outlet terminal (32) respectively are provided with an input terminal (31) and an outlet terminal (32) on loam cake (13) upper surface (131) of the left and right sides of said insulating barrier (17).
4. D.C. contactor according to claim 1 is characterized in that: said annular recess (14) comprises seal groove district (141) and the link slot district (142) that is communicated with seal groove district (141); The width in said link slot district (142) is greater than the width of seal groove district (141); Said rubber seal (4) is positioned at seal groove district (141), and the top of said base (12) is positioned at link slot district (142) and rubber seal (4) is pressed on seal groove district (141).
5. D.C. contactor according to claim 1 is characterized in that: also comprise being used for screw (18) that loam cake (13) and base (12) are fixed together; Said loam cake (13) is provided with shoulder hole; Said base (12) is provided with screw; The screw that the double-screw bolt of said screw (18) passes on shoulder hole and the base (12) is spirally connected, and the nut of screw (18) is arranged in shoulder hole, and the gap between nut and the shoulder hole is through casting glue (6) embedding.
6. D.C. contactor according to claim 1 is characterized in that: this D.C. contactor also comprises the erection support (5) that is used for himself being installed on the external equipment; Said erection support (5) comprises and protection housing (1) first connecting portion (51) that is fixedly connected and second connecting portion (52) that is fixedly connected with external equipment; Said first connecting portion (51) is being protected on the housing (1) through screw; Said second connecting portion (52) is provided with the fixed installation hole that is used for fixing on external equipment.
7. D.C. contactor according to claim 6 is characterized in that: the L shaped erection support (5) that said erection support (5) is made up of first connecting portion (51) and second connecting portion (52); The quantity of said erection support (5) is two and is separately positioned on protection housing (1) both sides relatively.
8. D.C. contactor according to claim 3 is characterized in that: said electromagnetic assembly (2) comprises the coil rack that is provided with slide opening, be wound on solenoid (21) on the coil rack, be arranged in the core bar (22) of the slide opening of coil rack, be set in iron core (23), push rod (24), lining (25), slide block (26) and spring base (27), back-moving spring (28) and touch spring (29) on the core bar (22) from bottom to top successively; The top of said back-moving spring (29) is against on the loam cake (12), and its bottom is against on the spring base (27); The top of said touch spring (29) is against on the slide block (26), and its bottom is against on the lining (25); The bottom of said outlet terminal (31) is provided with fixed contact, and the top of said slide block (26) is provided with moving contact;
Said lining (25) comprises blocking part (251) and sliding part (252), and said slide block (26) can move back and forth on sliding part (252), and the top of said touch spring (29) is against on the lower surface of slide block (26), and its bottom is against on the blocking part (251) of lining (25); Said touch spring (29) is the steel spring leaf.
9. D.C. contactor according to claim 8 is characterized in that: said back-moving spring (28) is helical form compression spring; Relevant position on the lower surface of the top of said spring base (27) and loam cake (12) is provided with groove, and the upper and lower side of said back-moving spring (28) lays respectively in the respective slot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200814326U CN202443919U (en) | 2012-03-06 | 2012-03-06 | DC (direct current) contactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200814326U CN202443919U (en) | 2012-03-06 | 2012-03-06 | DC (direct current) contactor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202443919U true CN202443919U (en) | 2012-09-19 |
Family
ID=46825354
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200814326U Expired - Lifetime CN202443919U (en) | 2012-03-06 | 2012-03-06 | DC (direct current) contactor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202443919U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103794416A (en) * | 2014-02-28 | 2014-05-14 | 浙江南峰电气有限公司 | Magnetism holding contactor |
| CN106449279A (en) * | 2016-10-26 | 2017-02-22 | 厦门宏发电力电器有限公司 | A DC contactor with auxiliary contacts |
| CN108140514A (en) * | 2015-10-02 | 2018-06-08 | 肖特（日本）株式会社 | High power capacity relay airtight terminal and the high power capacity relay contact arrangement using high power capacity relay airtight terminal |
| US11164711B2 (en) | 2016-09-29 | 2021-11-02 | Xiamen Hongfa Electric Power Controls Co., Ltd. | DC contactor with dual micro switches |
-
2012
- 2012-03-06 CN CN2012200814326U patent/CN202443919U/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103794416A (en) * | 2014-02-28 | 2014-05-14 | 浙江南峰电气有限公司 | Magnetism holding contactor |
| CN103794416B (en) * | 2014-02-28 | 2016-04-27 | 浙江南峰电气有限公司 | A kind of magnetic latching contactor |
| CN108140514A (en) * | 2015-10-02 | 2018-06-08 | 肖特（日本）株式会社 | High power capacity relay airtight terminal and the high power capacity relay contact arrangement using high power capacity relay airtight terminal |
| US10580602B2 (en) | 2015-10-02 | 2020-03-03 | Schott Japan Corporation | Hermetic terminal for high-capacity relay and contact device for high-capacity relay including the hermetic terminal |
| CN108140514B (en) * | 2015-10-02 | 2020-04-14 | 肖特（日本）株式会社 | Hermetic terminal for high-capacity relay and contact device for high-capacity relay using hermetic terminal for high-capacity relay |
| US11164711B2 (en) | 2016-09-29 | 2021-11-02 | Xiamen Hongfa Electric Power Controls Co., Ltd. | DC contactor with dual micro switches |
| CN106449279A (en) * | 2016-10-26 | 2017-02-22 | 厦门宏发电力电器有限公司 | A DC contactor with auxiliary contacts |
| WO2018077190A1 (en) * | 2016-10-26 | 2018-05-03 | 厦门宏发电力电器有限公司 | Dc contactor having auxiliary contact |
| CN106449279B (en) * | 2016-10-26 | 2019-01-01 | 厦门宏发电力电器有限公司 | A kind of D.C. contactor with auxiliary contact |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: ZHEJIANG NANFENG ELECTRIC APPLIANCE CO., LTD. Free format text: FORMER NAME: YUEQING NANFENG ELECTRIC APPLIANCE CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: 325604 Yang Yang Industrial Zone, Liushi Town, Zhejiang, Yueqing Patentee after: Zhejiang Nanfeng Electric Appliance Co., Ltd. Address before: 325604, No. 43 Bridge Road, Liushi Town, Wenzhou, Zhejiang, Yueqing Patentee before: Yueqing Nanfeng Electrical Co., Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120919 |