CN102991895A - Retractable hatch container and floating element equipotential connection system - Google Patents
Retractable hatch container and floating element equipotential connection system Download PDFInfo
- Publication number
- CN102991895A CN102991895A CN2012104235242A CN201210423524A CN102991895A CN 102991895 A CN102991895 A CN 102991895A CN 2012104235242 A CN2012104235242 A CN 2012104235242A CN 201210423524 A CN201210423524 A CN 201210423524A CN 102991895 A CN102991895 A CN 102991895A
- Authority
- CN
- China
- Prior art keywords
- housing
- twisted wire
- cavity
- wide copper
- static
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Elimination Of Static Electricity (AREA)
Abstract
The invention relates to an equipotential connection mechanism, and especially relates to a retractable hatch container and floating element equipotential connection system. The retractable hatch container and floating element equipotential connection system is characterized by comprising a pedestal, a rotation shaft, a static electricity export device, a wide copper compound strand wire, a swinging coil spring and a shell, wherein the shell is divided into an inner shell and an outer shell, the inner shell and the outer shell form a cavity A and a cavity B, the inner shell and the outer shell are coaxially distributed by taking the rotation shaft as an axis, the swinging coil spring is coiled on the rotation shaft, two ends of the swinging coil spring are respectively fixed on the rotation shaft and the inner shell, thus, the number of turns of the swinging coil spring varies along with the rotation of the rotation shaft in the cavity B; the wide copper compound strand wire is coiled in the cavity A on the periphery of the inner cavity, one end of the wide copper compound strand wire is fixed on the rotation shaft while the other end passes through the opening of the cavity A and further connects the floating element through the static electricity export device, the shell is connected with the pedestal, and the pedestal and the upper end of the retractable hatch container are fixed together through a soleplate. The invention provides a retractable hatch container and floating element equipotential connection system which is excellent in safety and high in reliability, so as to prevent lightning and static electricity, and avoid fire disaster.
Description
Technical field
The present invention relates to a kind of equipotential connection connection mechanism, particularly telescopic hatch container and float element equipotential connection welding system are used for the hatch container and are connected with the equipotential of float element, the effect that can play lightning protection anti electrostatic, avoid fire to occur.
Background technology
Hatch container among the present invention refers to that mainly these liquid dielectrics are generally volatile for the uncovered storage tank of steel welding that stores such as crude oil, diesel oil, gasoline, benzene and some chemical-liquid-mediums, and float element is in order to prevent these liquid dielectric evaporations.
Owing to having certain gap between hatch container and the float element, be provided with during this time sealant tape between the gap, the friction of they and hatch wall of container can produce static, and these static need actv. to derive, and is connected with equipotential between the float element to guarantee the hatch container.
Regulation according to SH3046 " petrochemical complex vertical cylinder steel welding tank design standard ": " when the soft seal of adopting non-metallic material to make, adopt at least two sectional areas to be not less than 16mm
2The multiple twisted wire of soft copper connects floating roof and tank skin." by being connected with floating roof greater than the high length of tank, when the floating roof liquid level raises soft copper again twisted wire be scattered on the floating roof, owing to exposing to wind and rain and the impact of environment makes this soft copper answer twisted wire very easily to corrode, thereby have potential safety hazard.Because the soft copper conductor length is longer, therefore no matter float element is in any position, its resistance is all larger, leads electrostatic interaction thereby lost to a great extent.
At thunderstorm weather, between the aerial charged cloud, between charged cloud and the peripheral facilities, all have discharging condition between charged cloud and the ground, these discharges can cause the acute variation of electric field around the hatch container.In order to reach the balance of electric field, induced charge on the float element in the hatch container can be released according to certain rules, and existing 2 of connecting hatch container and float element weave the moment that flex leads are difficult to satisfy induced charge and release, and will form transient potential between hatch container and the float element poor.The caulking gum that arranges between hatch container and the float element in addition also can cause the electric insulating between float element and the hatch container, metal object on the while sealant tape, all there is discharging condition such as conducting strip, tie bolt, metal sealing plate etc., in case difference of potential and spacing between they and the hatch container reach discharging condition, will the discharge generation spark, become the ignition source of accident.
Summary of the invention
The purpose of this invention is to provide a kind of safety is good, reliability is high telescopic hatch container and float element equipotential connection welding system, with lightning protection anti electrostatic, avoid the generation of fire.
The object of the present invention is achieved like this, telescopic hatch container and float element equipotential connection welding system, it is characterized in that: comprising: supporting seat, rotating shaft, static let-off gear(stand), the multiple twisted wire of wide copper, revolution wind spring, housing, housing is divided into inner and outer shell, inner and outer shell forms A cavity and B cavity, inner and outer shell is take rotating shaft coaxial distribution as the axle center, the revolution wind spring is wrapped in the rotating shaft, the two ends of revolution wind spring are fixed with rotating shaft and inner housing respectively, and the number of turns changes with the rotating shaft rotation in the B cavity to make the revolution wind spring; The multiple twisted wire of wide copper is wrapped in the A cavity of inner housing periphery, one end of the multiple twisted wire of wide copper is fixed in the rotating shaft, and the other end passes the opening of A cavity, is connected with float element by the static let-off gear(stand) again, housing is connected with supporting seat, and supporting seat is fixed by mount pad and telescopic hatch container upper end.
Described static let-off gear(stand) is to fix two copper axles at the static guiding ejecting plate to consist of, the multiple twisted wire of wide copper passes two copper axles, the static guiding ejecting plate is fixed on the housing, and then is electrically connected with tank body, the static charge on the float element can be passed to tank body by the multiple twisted wire of wide copper.
On the described supporting seat latching device is arranged, latching device and housing are dynamically connected, and latching device is for locking shell when mounted, stops the housing automatic rotary, make the multiple twisted wire of the wide copper that pulls out can automatic drawing back.
Described hull outside is enclosed with rainproof cover, can prevent wind and weather by actv., and surrounding environment is to the erosion of the multiple twisted wire of wide copper.
Advantage of the present invention is 1) the multiple twisted wire of wide copper is fixed on the housing, and housing is fixed on the hatch container by mount pad, thereby makes the multiple twisted wire of wide copper and hatch container become a loop.2) the multiple twisted wire of wide copper passes the static let-off gear(stand), and the static let-off gear(stand) is fixed on the housing, and housing is fixed on the hatch container by mount pad, thereby makes the multiple twisted wire of wide copper and hatch container form another loop.Can better the static charge on the float element be passed to the hatch container by the multiple twisted wire of wide copper, and then pass to the earth.This dual mode makes in the A chamber the multiple twisted wire line of wide copper form one with the hatch container dynamically to be connected, to keep good equipotential connection, thereby sets up good equipotential connection actv. lightning protection anti electrostatic.Avoid the generation of fire.
Description of drawings
The present invention will be further described below in conjunction with the embodiment accompanying drawing:
Accompanying drawing 1 is embodiment of the invention structural representation;
Accompanying drawing 2 is the downward section-drawings of Fig. 1 line of centers;
Accompanying drawing 3 is that the present invention uses state reference map.
Among the figure, 1, mount pad; 2, supporting seat; 3, latching device; 4, copper sheathing; 5, rotating shaft; 6, static let-off gear(stand); 7, the multiple twisted wire of wide copper; 8, revolution wind spring; 9, housing; 10, rainproof cover; 11, float element; 12, tank body.
The specific embodiment
As depicted in figs. 1 and 2, telescopic hatch container and float element equipotential connection welding system comprise: supporting seat 2, rotating shaft 5, static let-off gear(stand) 6, the multiple twisted wire 7 of wide copper, revolution wind spring 8, housing 9, housing 9 is divided into inner and outer shell, inner and outer shell forms A cavity and B cavity, inner and outer shell is take rotating shaft 5 coaxial distribution as the axle center, revolution wind spring 8 is wrapped in the rotating shaft 5, respectively there is a copper sheathing 4 at rotating shaft 5 two ends, the two ends of revolution wind spring 8 are fixed with rotating shaft 5 and inner housing respectively, and revolution wind spring 8 is rotated and number of turns variation with rotating shaft 5 in the B cavity; The multiple twisted wire 7 of wide copper is wrapped in the A cavity of inner housing periphery, and an end of the multiple twisted wire 7 of wide copper is fixed in the rotating shaft 5, and the other end passes the opening of A cavity, is connected with bolt with float element by static let-off gear(stand) 6 again, and conductive paste is smeared at the place of being connected and fixed.Housing 9 is connected with supporting seat 2, and supporting seat 2 is fixed by mount pad 1 and telescopic hatch container upper end.Mount pad 1 is screwed the top at tank body, and conductive paste is smeared by bearing.
Static let-off gear(stand) 6 is provided with two-way static let-off gear(stand), static let-off gear(stand) 6 is to fix two copper axles at the static guiding ejecting plate, allow the multiple twisted wire 7 of wide copper pass two fixed copper axles, the static guiding ejecting plate is fixed on the housing 9, and then be electrically connected with tank body 12, the static charge on the float element can be passed to tank body 12 by the multiple twisted wire 7 of wide copper.
At supporting seat 2 latching device 3 is arranged, latching device 3 is dynamically connected with housing 9, and latching device 3 is for locking shell 9 when mounted, stops housing 9 automatic rotaries, makes the multiple twisted wire 7 of the wide copper that pulls out can automatic drawing back.
Housing 9 outsides are enclosed with rainproof cover 10, can prevent wind and weather by actv., and surrounding environment is to the erosion of the multiple twisted wire of wide copper.
As shown in Figure 3, fix respectively the multiple twisted wire 7 of wide copper and revolution wind spring 8 by A cavity and B cavity, the multiple twisted wire 7 of wide copper be connected wind spring 8 and be connected simultaneously with rotating shaft 5, multiple twisted wire 7 other ends of wide copper are connected with float element, thereby set up electrical connection path good between float element and the hatch container, no matter be rising or the decline of float element, under the effect of revolution wind spring 8, all can make multiple twisted wire 7 automatic deploying and retractings of wide copper and keep tension; When float element descends, the elongation that thereupon descends of the multiple twisted wire 7 of wide copper, and the B chamber that makes the A chamber that is wound with the multiple twisted wire 7 of wide copper and be wound with revolution wind spring 8 rotates around rotating shaft 5 synchronously, this turns round revolution wind spring 8 energy accumulations in wind spring B chamber; When float element rises, the multiple twisted wire 7 of wide copper rises thereupon, turn round wind spring 8 and release energy this moment, be wound with the A chamber of the multiple twisted wire 7 of wide copper and be wound with the B chamber of turning round wind spring 8 and roll recovery around rotating shaft 5 contrarotations and with the multiple twisted wire 7 of wide copper, all the time make the multiple length of twisted wire 7 from the hatch container to float element of wide copper the shortest, the static charge that float element 11 is collected discharges fast to the earth, connects the actv. lightning protection anti electrostatic thereby set up good equipotential.Avoid the generation of fire.
The present invention has an opposition owing to turning round wind spring 8 when mounted, if spur the multiple twisted wire of wide copper, revolution wind spring 8 has a screen resilience in order to tighten up the multiple twisted wire of wide copper.Fixedly the time, the wide copper of need to holding is answered twisted wire to the multiple twisted wire of wide copper with float element, not so wide copper answer twisted wire will automatic retraction A chamber.Latching device 3 is exactly to have played the effect that stops the multiple twisted wire automatic retraction of wide copper.The multiple twisted wire of wide copper is moved on the float element, pull the handle locking housing 9 of latching device, stop housing 9 to rotate, make the multiple twisted wire 7 of the wide copper that pulls out can automatic drawing back, after fixing the multiple twisted wire of wide copper, the handle of rotary locking device makes latching device 3 break away from housing 9, thereby housing 9 is rotated freely.
Static let-off gear(stand) 6 is provided with two-way static let-off gear(stand), and its effect is: 1) the multiple twisted wire 7 of wide copper is fixed on the housing 9, and housing 9 is fixed on the hatch container by mount pad 1, thereby makes the multiple twisted wire of wide copper and hatch container become a loop.2) the multiple twisted wire 7 of wide copper passes static let-off gear(stand) 6, and static let-off gear(stand) 6 is fixed on the housing 9, and housing 9 is fixed on the hatch container by mount pad 1, thereby makes the multiple twisted wire of wide copper and hatch container form another loop.Can better the static charge on the float element be passed to the hatch container by the multiple twisted wire 7 of wide copper, and then pass to the earth.This dual mode makes in the A chamber the multiple twisted wire line 7 of wide copper form one with the hatch container dynamically to be connected, to keep good equipotential connection.
Claims (4)
1. telescopic hatch container and float element equipotential connection welding system, it is characterized in that: comprising: supporting seat (2), rotating shaft (5), static let-off gear(stand) (6), the multiple twisted wire (7) of wide copper, revolution wind spring (8), housing (9), housing (9) is divided into inner and outer shell, inner and outer shell forms A cavity and B cavity, inner and outer shell is take rotating shaft (5) coaxial distribution as the axle center, revolution wind spring (8) is wrapped in the rotating shaft (5), the two ends of revolution wind spring (8) are fixed with rotating shaft (5) and inner housing respectively, and revolution wind spring (8) is rotated and number of turns variation with rotating shaft (5) in the B cavity; The multiple twisted wire (7) of wide copper is wrapped in the A cavity of inner housing periphery, one end of the multiple twisted wire (7) of wide copper is fixed in the rotating shaft (5), the other end passes the opening of A cavity, be connected with float element by static let-off gear(stand) (6) again, housing (9) is connected with supporting seat (2), and supporting seat (2) is fixed by mount pad (1) and telescopic hatch container upper end.
2. telescopic hatch container according to claim 1 and float element equipotential connection welding system, it is characterized in that: described static let-off gear(stand) (6) is to fix two copper axles at the static guiding ejecting plate to consist of, the multiple twisted wire (7) of wide copper passes two copper axles, the static guiding ejecting plate is fixed on the housing (9), and then be electrically connected with tank body (12), the static charge on the float element can be passed to tank body (12) by the multiple twisted wire (7) of wide copper.
3. telescopic hatch container according to claim 1 and float element equipotential connection welding system, it is characterized in that: latching device (3) is arranged on the described supporting seat (2), latching device (3) is dynamically connected with housing (9), latching device (3) is for locking shell (9) when mounted, stop housing (9) automatic rotary, twisted wire (7) can automatic drawing back again to make the wide copper that pulls out.
4. telescopic hatch container according to claim 1 and float element equipotential connection welding system is characterized in that: be enclosed with rainproof cover (10) outside the described housing (9).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210434449.XA CN102946682B (en) | 2012-10-30 | 2012-10-30 | Static electricity eliminating method for floating element of telescopic hatch container |
| CN201210423524.2A CN102991895B (en) | 2012-10-30 | 2012-10-30 | Retractable hatch container and floating element equipotential connection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210423524.2A CN102991895B (en) | 2012-10-30 | 2012-10-30 | Retractable hatch container and floating element equipotential connection system |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210434449.XA Division CN102946682B (en) | 2012-10-30 | 2012-10-30 | Static electricity eliminating method for floating element of telescopic hatch container |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102991895A true CN102991895A (en) | 2013-03-27 |
| CN102991895B CN102991895B (en) | 2017-05-24 |
Family
ID=47921119
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210423524.2A Active CN102991895B (en) | 2012-10-30 | 2012-10-30 | Retractable hatch container and floating element equipotential connection system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102991895B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103738614A (en) * | 2013-12-30 | 2014-04-23 | 克雷特(大连)科技有限公司 | Floating roof metal storage tank lightning protection grounding device |
| CN104691982A (en) * | 2015-03-06 | 2015-06-10 | 翟占江 | Intrinsic safety type floating roof tank anti-thunder anti-static connector |
| CN104859980A (en) * | 2014-02-20 | 2015-08-26 | 株式会社日立制作所 | Floater Grounding Device |
| CN104875985A (en) * | 2015-04-13 | 2015-09-02 | 江苏飞锦达科技有限公司 | Equipotential connecting device and floater |
| CN108609304A (en) * | 2018-03-27 | 2018-10-02 | 江苏德大石化科技有限公司 | A kind of intrinsic safety explosion-proof lightning current current divider |
| CN109051398A (en) * | 2018-08-28 | 2018-12-21 | 浙江人通电力科技有限公司 | A kind of floating roof tank Equipotential connector |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2225121Y (en) * | 1994-12-09 | 1996-04-17 | 崔恩贵 | Winding style electrostatic guide |
| CN2442972Y (en) * | 2000-08-28 | 2001-08-15 | 王明文 | Electrostatic ground band coiling box for loading and unloading goods of tank car |
| JP2002231493A (en) * | 2001-02-07 | 2002-08-16 | Tokyo Denki Univ | Discharge ignition explosion preventive method and device of electric insulating inflammable liquid in vessel |
| WO2003016178A1 (en) * | 2001-08-06 | 2003-02-27 | Zhenqi Song | Oil storage tank equipped with a floating roof means of floating bed type |
| CN2573428Y (en) * | 2002-10-14 | 2003-09-17 | 孙元 | Secondary arc eliminating 'on' device for floating-roof tank |
| CN1787720A (en) * | 2005-11-11 | 2006-06-14 | 中国石油化工股份有限公司 | Lightning protection anti electrostatic grounding device for crude oil floating top pot floating dish |
| CN201470997U (en) * | 2009-06-12 | 2010-05-19 | 王骥 | Cutter turntable locking device |
| CN202949620U (en) * | 2012-10-30 | 2013-05-22 | 李波涛 | Equipotential connection mechanism of telescopic type hatch container and floating element |
| CN203167406U (en) * | 2012-10-30 | 2013-08-28 | 李波涛 | Static elimination device for floating element of telescopic hatch container |
-
2012
- 2012-10-30 CN CN201210423524.2A patent/CN102991895B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2225121Y (en) * | 1994-12-09 | 1996-04-17 | 崔恩贵 | Winding style electrostatic guide |
| CN2442972Y (en) * | 2000-08-28 | 2001-08-15 | 王明文 | Electrostatic ground band coiling box for loading and unloading goods of tank car |
| JP2002231493A (en) * | 2001-02-07 | 2002-08-16 | Tokyo Denki Univ | Discharge ignition explosion preventive method and device of electric insulating inflammable liquid in vessel |
| WO2003016178A1 (en) * | 2001-08-06 | 2003-02-27 | Zhenqi Song | Oil storage tank equipped with a floating roof means of floating bed type |
| CN2573428Y (en) * | 2002-10-14 | 2003-09-17 | 孙元 | Secondary arc eliminating 'on' device for floating-roof tank |
| CN1787720A (en) * | 2005-11-11 | 2006-06-14 | 中国石油化工股份有限公司 | Lightning protection anti electrostatic grounding device for crude oil floating top pot floating dish |
| CN201470997U (en) * | 2009-06-12 | 2010-05-19 | 王骥 | Cutter turntable locking device |
| CN202949620U (en) * | 2012-10-30 | 2013-05-22 | 李波涛 | Equipotential connection mechanism of telescopic type hatch container and floating element |
| CN203167406U (en) * | 2012-10-30 | 2013-08-28 | 李波涛 | Static elimination device for floating element of telescopic hatch container |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103738614A (en) * | 2013-12-30 | 2014-04-23 | 克雷特(大连)科技有限公司 | Floating roof metal storage tank lightning protection grounding device |
| CN104859980A (en) * | 2014-02-20 | 2015-08-26 | 株式会社日立制作所 | Floater Grounding Device |
| CN104691982A (en) * | 2015-03-06 | 2015-06-10 | 翟占江 | Intrinsic safety type floating roof tank anti-thunder anti-static connector |
| CN104875985A (en) * | 2015-04-13 | 2015-09-02 | 江苏飞锦达科技有限公司 | Equipotential connecting device and floater |
| CN108609304A (en) * | 2018-03-27 | 2018-10-02 | 江苏德大石化科技有限公司 | A kind of intrinsic safety explosion-proof lightning current current divider |
| CN108609304B (en) * | 2018-03-27 | 2023-10-03 | 江苏德大石化科技有限公司 | Intrinsic safety explosion-proof lightning current shunt |
| CN109051398A (en) * | 2018-08-28 | 2018-12-21 | 浙江人通电力科技有限公司 | A kind of floating roof tank Equipotential connector |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102991895B (en) | 2017-05-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102991895A (en) | Retractable hatch container and floating element equipotential connection system | |
| CN102946682A (en) | Static electricity eliminating method for floating element of telescopic hatch container | |
| CN100415066C (en) | Lightning protection anti electrostatic grounding device for crude oil floating top pot floating dish | |
| CN202949620U (en) | Equipotential connection mechanism of telescopic type hatch container and floating element | |
| CN203167406U (en) | Static elimination device for floating element of telescopic hatch container | |
| CN206013515U (en) | A kind of middle low frequency lightning current diverter for External floating roof tank | |
| CN202575119U (en) | Anti-swing component of retractable grounding device | |
| CN201975190U (en) | Bridge connection type shifting multi-function arrester | |
| CN212321765U (en) | Distribution lines insulated conductor rainwater is to experimental testing arrangement of discharge influence | |
| CN208360982U (en) | Intrinsic safety explosion-proof lightning current current divider | |
| CN115331402B (en) | Self-checking type static wire device of aircraft refueling equipment | |
| CN103490284A (en) | External column type voltage limiter for urban rail catenary | |
| CN210349422U (en) | High-pressure submarine cable long-distance landing structure | |
| CN108609304B (en) | Intrinsic safety explosion-proof lightning current shunt | |
| CN209104387U (en) | A kind of ring network cabinet bus connection structure | |
| CN107863754B (en) | A kind of transformer leakage stream automatic earthing electric installation | |
| CN202473432U (en) | Insulator preventing flashover discharge | |
| CN216661090U (en) | Storage tank thunder and lightning diverging device | |
| CN207559091U (en) | A kind of energy saving and environment friendly grounding-for-lightning device | |
| CN103738614A (en) | Floating roof metal storage tank lightning protection grounding device | |
| CN209684488U (en) | A kind of diverter | |
| CN108233316A (en) | A kind of floating top oil tank current limliting lightning arrester | |
| CN219436169U (en) | Chemical oil storage lightning protection grounding device | |
| KR20120019994A (en) | Auto reel type bypass conductors system for lightning courrent discharge on floating roof type flammable storage tanks | |
| CN203103106U (en) | Voltage transformer for GIS and C-GIS |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20170324 Address after: The eastern city of Handan province Hebei Xuechi road 056005 Applicant after: Hebei Zhufeng Instrument & Meter Co., Ltd. Address before: 710077 Xi'an province hi tech West Road, Jin Jin Road, No. 69 apartment building Applicant before: Xi'an Xinwei Information Science and Technology Co., Ltd. |
|
| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder |
Address after: 056600 west section of Gucheng Road, Linzhang County, Handan, Hebei Patentee after: Hebei Zhufeng Instrument & Meter Co., Ltd. Address before: 056005 eastern section of snow road, Handan, Hebei Patentee before: Hebei Zhufeng Instrument & Meter Co., Ltd. |
|
| CP02 | Change in the address of a patent holder |