JP3465862B2 - Door beam - Google Patents

Door beam

Info

Publication number
JP3465862B2
JP3465862B2 JP24366995A JP24366995A JP3465862B2 JP 3465862 B2 JP3465862 B2 JP 3465862B2 JP 24366995 A JP24366995 A JP 24366995A JP 24366995 A JP24366995 A JP 24366995A JP 3465862 B2 JP3465862 B2 JP 3465862B2
Authority
JP
Japan
Prior art keywords
door beam
door
aluminum alloy
crushed
present
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.)
Expired - Lifetime
Application number
JP24366995A
Other languages
Japanese (ja)
Other versions
JPH0958386A (en
Inventor
浩之 山下
晃 宮上
正和 平野
直 相浦
一浩 貝田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kobe Steel Ltd
Original Assignee
Kobe Steel Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kobe Steel Ltd filed Critical Kobe Steel Ltd
Priority to JP24366995A priority Critical patent/JP3465862B2/en
Publication of JPH0958386A publication Critical patent/JPH0958386A/en
Application granted granted Critical
Publication of JP3465862B2 publication Critical patent/JP3465862B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Description

【発明の詳細な説明】 【0001】 【発明の属する技術分野】本発明は衝突時の乗員にかか
る衝撃を緩衝する車両用ドアビームに関する。 【0002】 【従来の技術】車両には、安全対策の一貫として、衝突
時の衝撃から乗員を保護する各種の緩衝部材が装着され
ているが、近年自動車用の緩衝部材として、例えば側面
からの衝突の衝撃から乗員を保護するため、ドア内部に
補強用の横梁(ドアビーム)が装着されるようになって
きた。ドアビームは主にドアの内側への障害物の侵入を
極力防止しようというもので、高剛性で衝突時のエネル
ギを吸収する能力の高いことが要求され、軽量化の要請
もあり、一般的にはアルミニウム合金の中空押出形材が
適用されている。 【0003】現在ドアビームのドアへの装着は一般的に
ブラケット方式で行われている。これは図5に例示する
ように、押出形材1の両端に鉄製のブラケット2を固定
し、ブラケット2を介してボルト3によりドアへ装着す
る方式である。しかし、この方式では部品点数が多くな
り、ブラケット2の加工も必要であるので製造工程が多
くなり、それがドアビームのトータルコストを押し上げ
ているのが現状である。 【0004】 【発明が解決しようとする課題】本発明は、ドアビーム
に関する上記問題点に鑑みてなされたものであって、取
付用のブラケット等を別途必要とせず、車両への好適な
取り付け部加工を容易に行うことができるドアビームを
提供することを目的とする。 【0005】 【課題を解決するための手段】本発明に関わるドアビー
ムは、両端部をつぶしたアルミニウム合金製中空押出形
材からなり、当該両端部を取り付け部分としたもので、
前記アルミニウム合金製中空押出形材は、長さ方向に垂
直な断面でみたとき、互いに平行な一対のフランジの間
を該フランジに対し垂直な一対のウエブで連結し、かつ
各フランジの両端が両ウエブとの連結部より外側に張り
出した断面形状を有し、前記両端部は前記フランジに垂
直方向につぶれていて各ウエブがいずれも外側に座屈し
ていることを特徴とする。ドアビームの製造において、
熱間押出加工されたアルミニウム合金製中空形材のドア
ビームの両端部相当位置をつぶして短尺切断を行うこと
ができる。 【0006】 【発明の実施の形態】本発明では、ドアビームとして
端部をつぶしたアルミニウム合金製中空押出形材を用
い、当該両端部を取り付け部分として利用する。図1は
本発明をドアビームに適用したもので、両端部10aを
つぶしたアルミニウム合金製中空押出形材10をドアビ
ームとした例であり、両端にボルト取付穴が形成され、
ボルト12によりドアの取り付け部分へ取り付けられる
ようになっている。取付用のブラケット等を別途必要と
しない。図1に示されるように、アルミニウム合金製中
空押出形材10は、長さ方向に垂直な断面でみたとき、
互いに平行な一対のフランジ5,6の間を該フランジ
5,6に対し垂直な一対のウエブ7,8で連結し、かつ
各フランジ5,6の両端が両ウエブ7,8との連結部よ
り外側に張り出した断面形状を有し、前記両端部は前記
フランジ5,6に垂直方向につぶれていて各ウエブ7,
8がいずれも外側に座屈している。 【0007】なお、図1に示したものは、両端部を完全
につぶし切った例であるが、完全につぶし切る前で止め
ておいてもよい。つぶし切る方が、つぶれ量のコントロ
ールが簡単であるし、取り付け時に座屈(つぶれて変形
すること)しないので、ドア等への取り付けも簡単であ
る。また、切断の際切断部断面形状の変形が起こりにく
い。しかし、つぶし切らない方が断面係数が大きく、剛
性が高くなることもあるので、つぶし切るか、つぶし切
る前で止めるかは、つぶれ量のコントロール、取り付け
や切断の容易さ等を総合的に考慮して決めればよい。 【0008】このようなドアビームは、図2に例示する
ように、熱間押出加工した長尺の中空形材14の、車両
用緩衝部材の両端部相当位置14aをプレス型15で押
しつぶし、破線Xの位置を切断することで個々の短尺の
ドアビームとすることができる。プレス型15による押
しつぶしは、熱間押出プレスから長尺の中空形材14を
切り離した後、すなわちオフラインで行ってもよいし、
切り離すことなくそのままオンラインで行ってもよい。
また、切断は押しつぶした後行ってもよいし、押しつぶ
しと同時に行うこともできる。さらに、図3に例示する
ように、ドアビームの両端部の形状を例えばドア等の取
り付け部分の形状に合わせた形状とするため、相応する
端面形状を備えるプレス型15aを使用することも自在
である。なお、熱間押出加工したままの長尺の素材を定
長に切断した後、その両端部をプレスで押しつぶすよう
にしてもよい。 【0009】 【実施例】以下、ドアビームの実施例を示して、本発明
の効果を説明する。 【0012】試験番号1〜5のドアビームの製造手順は
以下の通りである。なお、このドアビームは図4に示す
断面形状をもち、素材はJIS7N01である。 試験番号1・・熱間押出したアルミニウム合金中空形材
を定寸に切断後、両端を揃えて多数本を並列に並べ、そ
れらの両端部を多数本同時にプレスで平に押しつぶし、
各々の両端部に取り付け用のボルト穴を明ける。これは
本発明例に相当する。 試験番号2・・熱間押出したアルミニウム合金中空形材
を長尺のままドアビームの両端部相当位置を一定間隔で
プレスで平に押しつぶした後、一本づつ定寸に切断し、
両端部に取り付け用のボルト穴を明ける。これは本発明
例に相当する。 試験番号3・・熱間押出したアルミニウム合金中空形材
を定寸に切断し、鉄製のブラケットを装着する。これは
先に示した図5の例に相当する。 試験番号4・・熱間押出したアルミニウム合金中空形材
を定寸に切断し、切削により両端部を加工してそこに取
り付け用のボルト穴を明ける。 試験番号5・・熱間押出したアルミニウム合金形材を定
寸に切断し、そのまま両端部に取り付け用のボルト穴を
明ける。 【0010】上記試験番号1〜5のドアビームの部品点
数(ドアに取り付ける状態になるまでに必要な部品点
数)、製造コスト及び曲げ性能(両端を固定した3点曲
げテストによる曲げ強度)の評価を下記表1に示す。表
1において、部品点数の評価は比較例3を×、比較例3
より大きく改善されたものを○とし、カッコ内に部品点
数を記載した。製造コストは概略見積値であり、その評
価は比較例3及びそれと同等のものを×、比較例3より
大きく改善されたものを○とし、カッコ内に試験番号3
の製造コストを100としたときの比を記載した。曲げ
性能の評価は比較例3及びそれと同等のものを○、比較
例より劣るものを△、大きく劣るものを×とし、カッコ
内に試験番号3の曲げ強度を100としたときの比を記
載した。 【0011】 【表1】 【0012】表1に示すように、本発明例である試験番
号1及び2のドアビームは、曲げ性能は従来例である試
験番号3と同等であり、部品点数及び製造コストで優っ
ている。 【0013】 【発明の効果】以上説明したように、本発明に係るドア
ビームは、取付用のブラケット等を別途必要とせず、車
両への好適な取り付け部加工を容易に行うことができ
る。
Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle door beam for cushioning an impact applied to an occupant in a collision. 2. Description of the Related Art As a safety measure, a vehicle is equipped with various cushioning members for protecting an occupant from an impact at the time of a collision. In order to protect occupants from the impact of a collision, a reinforcing cross beam (door beam) has been installed inside the door. Door beams are mainly intended to prevent obstacles from entering the inside of the door as much as possible, and are required to have high rigidity and a high ability to absorb energy at the time of collision, and there is also a demand for weight reduction. A hollow extruded profile of an aluminum alloy has been applied. At present, a door beam is generally mounted on a door by a bracket method. In this method, as shown in FIG. 5 , an iron bracket 2 is fixed to both ends of the extruded profile 1 and the bracket 2 is attached to a door with a bolt 3 via the bracket 2. However, in this method, the number of components increases, and the machining of the bracket 2 is also required, so that the number of manufacturing steps increases, which at present raises the total cost of the door beam. SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems with respect to a door beam, and does not require a separate mounting bracket or the like. Door beam which can be easily done
The purpose is to provide . [0005] The door beam according to the present invention is made of an aluminum alloy hollow extruded member whose both ends are crushed , and the both ends are attached parts.
When viewed in a cross section perpendicular to the length direction, the aluminum alloy hollow extruded section connects a pair of flanges parallel to each other with a pair of webs perpendicular to the flanges, and both ends of each flange have both ends. It has a cross-sectional shape protruding outward from a connection portion with a web, and the both ends are crushed in a vertical direction with the flange, and each web is buckled outward . In the manufacture of door beams,
Performing the short cut crush both ends corresponding position of the door beam hot extruded aluminum alloy hollow shape member
Can be. [0006] In the present invention, both doors as a door beam
An aluminum alloy hollow extruded shape whose end is crushed is used, and both ends are used as attachment parts. FIG. 1 shows an example in which the present invention is applied to a door beam, in which an aluminum alloy hollow extruded profile 10 having both ends 10a crushed is used as a door beam, and bolt mounting holes are formed at both ends.
It can be attached to a door attachment portion by a bolt 12. There is no need for a separate mounting bracket or the like. As shown in FIG. 1, the hollow extruded profile 10 made of an aluminum alloy has a cross section perpendicular to the length direction.
A pair of parallel flanges 5 and 6 are connected by a pair of webs 7 and 8 perpendicular to the flanges 5 and 6, and both ends of each of the flanges 5 and 6 are connected to a connection portion between the two webs 7 and 8. It has a cross-sectional shape protruding outward, and the both ends are crushed in a vertical direction by the flanges 5 and 6 so that the webs 7 and
8 buckle outward. Although FIG. 1 shows an example in which both ends are completely crushed, it may be stopped before completely crushed. In the crushing method, the amount of crushing is easier to control, and buckling (crushing and deformation) does not occur during mounting. Further, the deformation of the cross-sectional shape of the cut portion hardly occurs at the time of cutting. However, if not crushed, the section modulus will be larger and the rigidity may be higher.Therefore, whether to crush or stop before crushing, comprehensively consider the control of the amount of crushing, ease of installation and cutting, etc. And decide. As shown in FIG. 2 , such a door beam squeezes a position 14a corresponding to both ends of a shock absorbing member for a vehicle of a long extruded hollow shape member 14 with a press die 15, and dashed line X By cutting the position of the individual short
It can be a door beam . The crushing by the press die 15 may be performed after the long hollow shape member 14 is separated from the hot extrusion press, that is, may be performed offline,
It may be performed online without disconnection.
The cutting may be performed after crushing, or may be performed simultaneously with crushing. Further, as illustrated in FIG. 3, in order to make the shape of both ends of the door beam into a shape corresponding to the shape of a mounting portion such as a door, it is also possible to use a press die 15a having a corresponding end surface shape. . In addition, you may make it crush a long material as it is hot-extrusion processing to a fixed length, and crush both ends with a press. The effects of the present invention will be described below with reference to an embodiment of a door beam . The procedure for manufacturing the door beams of test numbers 1 to 5 is as follows. The door beam has a cross-sectional shape shown in FIG. 4 , and the material is JIS7N01. Test No. 1 ・ ・ After cutting a hot-extruded aluminum alloy hollow profile to a fixed size, align both ends and arrange a number of them in parallel.
Drill mounting bolt holes at each end. This corresponds to the example of the present invention. Test No. 2 ・ ・ After squeezing the hot-extruded aluminum alloy hollow profile into the long and long positions corresponding to both ends of the door beam at regular intervals with a press, cut each piece into a fixed size,
Drill mounting bolt holes at both ends. This corresponds to the example of the present invention. Test No. 3 ·· Cut the aluminum alloy hollow profile extruded to a fixed size and attach an iron bracket. This corresponds to the example of FIG. 5 described above. Test No. 4 ··· Hot extruded aluminum alloy hollow profile is cut to a fixed size, both ends are machined by cutting, and bolt holes for mounting are drilled there. Test No. 5: Cut the hot-extruded aluminum alloy profile into a fixed size, and drill bolt holes for mounting at both ends as they are. The evaluation of the number of parts of the door beams of the above test numbers 1 to 5 (the number of parts required until the door is mounted), the manufacturing cost, and the bending performance (bending strength by a three-point bending test in which both ends are fixed) are evaluated. It is shown in Table 1 below. In Table 1, the evaluation of the number of parts was evaluated as Comparative Example 3 x, Comparative Example 3
The ones that were greatly improved were marked with ○, and the number of parts was indicated in parentheses. The manufacturing cost is a rough estimate, and the evaluation was evaluated as x for Comparative Example 3 and equivalents, and ○ for significantly improved than Comparative Example 3, with test number 3 in parentheses.
The ratio is shown when the production cost is 100. The evaluation of the bending performance was Comparative Example 3 and those equivalent thereto were evaluated as ○, those inferior to the comparative example as Δ, those significantly inferior as X, and the ratio when the bending strength of Test No. 3 was set to 100 in parentheses. . [Table 1] As shown in Table 1, the bending performance of the door beams of Test Nos. 1 and 2 of the present invention is equivalent to that of Test No. 3 of the conventional example, and is superior in the number of parts and the manufacturing cost. As described above, the door according to the present invention is provided.
The beam can be easily processed for a suitable mounting part to the vehicle without requiring additional brackets or the like for mounting.
You.

【図面の簡単な説明】 【図1】 本発明のドアビームの側面図(a)、平面図
(b)、断面図(c)及び正面図(d)である。 【図2】 本発明における押出形材のプレスによる押し
つぶし及び切断を説明する模式図である。 【図3】 本発明のドアビームの両端取付部の形状例と
プレス型の模式図である。 【図4】 実施例に使用したドアビームの断面形状を示
す図である。 【図5】 従来のドアビームの平面図(a)及び断面図
(b)である。 【符号の説明】 10 ドアビーム 10a その取付部分
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view (a), a plan view (b), a sectional view (c) and a front view (d) of a door beam of the present invention. FIG. 2 is a schematic diagram illustrating crushing and cutting of an extruded material by a press in the present invention. FIG. 3 is a schematic diagram of a shape example of a mounting portion at both ends of a door beam of the present invention and a press die. FIG. 4 is a diagram showing a cross-sectional shape of a door beam used in the example. FIG. 5 is a plan view (a) and a sectional view (b) of a conventional door beam. [Description of Signs] 10 Door beam 10a Attachment part

───────────────────────────────────────────────────── フロントページの続き (72)発明者 相浦 直 山口県下関市長府港町14番1号 株式会 社神戸製鋼所 長府製造所内 (72)発明者 貝田 一浩 山口県下関市長府港町14番1号 株式会 社神戸製鋼所 長府製造所内 (56)参考文献 特開 平4−63720(JP,A) 特開 平5−65531(JP,A) 特開 平8−85340(JP,A) (58)調査した分野(Int.Cl.7,DB名) B60R 21/02 B60J 5/00 F16F 7/00 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Nao Aiura 14-1, Nagafuminatocho, Shimonoseki City, Yamaguchi Prefecture Inside Kobe Steel, Ltd. Chofu Works (72) Inventor Kazuhiro Kaida 141-1 Nagafuminatomachi, Shimonoseki City, Yamaguchi Prefecture No. Kobe Steel, Ltd. Chofu Works (56) References JP-A-4-63720 (JP, A) JP-A-5-65531 (JP, A) JP-A-8-85340 (JP, A) ( 58) Field surveyed (Int. Cl. 7 , DB name) B60R 21/02 B60J 5/00 F16F 7/00

Claims (1)

(57)【特許請求の範囲】 【請求項1】 両端部をつぶしたアルミニウム合金製中
空押出形材からなり、当該両端部を取り付け部分とした
ドアビームであり、前記アルミニウム合金製中空押出形
材は、長さ方向に垂直な断面でみたとき、互いに平行な
一対のフランジの間を該フランジに対し垂直な一対のウ
エブで連結し、かつ各フランジの両端が両ウエブとの連
結部より外側に張り出した断面形状を有し、前記両端部
は前記フランジに垂直方向につぶれていて、各ウエブが
いずれも外側に座屈していることを特徴とするドアビー
ム。
(57) [Claim 1] A door beam made of an aluminum alloy hollow extruded member whose both ends are crushed, and the both ends are attached to the door beam. When viewed in a cross section perpendicular to the length direction, a pair of flanges parallel to each other are connected by a pair of webs perpendicular to the flanges, and both ends of each flange project outward from a connection portion between the two webs. A door beam having a bent cross-sectional shape, wherein the both ends are crushed in a direction perpendicular to the flange, and each web is buckled outward.
JP24366995A 1995-08-28 1995-08-28 Door beam Expired - Lifetime JP3465862B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP24366995A JP3465862B2 (en) 1995-08-28 1995-08-28 Door beam

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP24366995A JP3465862B2 (en) 1995-08-28 1995-08-28 Door beam

Publications (2)

Publication Number Publication Date
JPH0958386A JPH0958386A (en) 1997-03-04
JP3465862B2 true JP3465862B2 (en) 2003-11-10

Family

ID=17107238

Family Applications (1)

Application Number Title Priority Date Filing Date
JP24366995A Expired - Lifetime JP3465862B2 (en) 1995-08-28 1995-08-28 Door beam

Country Status (1)

Country Link
JP (1) JP3465862B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9371047B2 (en) 2013-09-09 2016-06-21 Kobe Steel, Ltd. Bumper structure and method for manufacturing bumper beam
US9399437B2 (en) 2013-09-09 2016-07-26 Kobe Steel, Ltd. Bumper reinforcement and method for manufacturing the same
US10138537B2 (en) 2013-01-30 2018-11-27 Kobe Steel, Ltd. 7xxx series aluminum alloy member excellent in stress corrosion cracking resistance and method for manufacturing the same

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Publication number Priority date Publication date Assignee Title
JP5106775B2 (en) * 2005-01-06 2012-12-26 日産自動車株式会社 Vehicle energy absorbing member and door guard beam using the same
JP4912614B2 (en) * 2005-05-09 2012-04-11 株式会社日立製作所 Rail vehicle
JP4878846B2 (en) * 2006-01-11 2012-02-15 日産自動車株式会社 VEHICLE DOOR STRUCTURE HAVING VEHICLE DOOR GUARD BAR AND MANUFACTURING METHOD FOR VEHICLE DOOR GUARD BAR
JP5852497B2 (en) * 2012-04-05 2016-02-03 株式会社神戸製鋼所 Hollow member for reinforcement and manufacturing method thereof
JP6170895B2 (en) 2014-10-22 2017-07-26 株式会社神戸製鋼所 Collision resistant parts for automobiles
JP6712173B2 (en) * 2015-08-06 2020-06-17 株式会社神戸製鋼所 Door beam and manufacturing method thereof

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10138537B2 (en) 2013-01-30 2018-11-27 Kobe Steel, Ltd. 7xxx series aluminum alloy member excellent in stress corrosion cracking resistance and method for manufacturing the same
US10144997B2 (en) 2013-01-30 2018-12-04 Kobe Steel, Ltd. 7xxx series aluminum alloy member excellent in stress corrosion cracking resistance and method for manufacturing the same
US9371047B2 (en) 2013-09-09 2016-06-21 Kobe Steel, Ltd. Bumper structure and method for manufacturing bumper beam
US9399437B2 (en) 2013-09-09 2016-07-26 Kobe Steel, Ltd. Bumper reinforcement and method for manufacturing the same

Also Published As

Publication number Publication date
JPH0958386A (en) 1997-03-04

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