JP2004351492A - Device for clamping mold in molten metal casting line - Google Patents

Device for clamping mold in molten metal casting line Download PDF

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Publication number
JP2004351492A
JP2004351492A JP2003153572A JP2003153572A JP2004351492A JP 2004351492 A JP2004351492 A JP 2004351492A JP 2003153572 A JP2003153572 A JP 2003153572A JP 2003153572 A JP2003153572 A JP 2003153572A JP 2004351492 A JP2004351492 A JP 2004351492A
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Japan
Prior art keywords
chain
mold
hook
support
support arm
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Granted
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JP2003153572A
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Japanese (ja)
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JP4284645B2 (en
Inventor
Akito Suzuki
明人 鈴木
Shinji Fujioka
眞二 藤岡
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Sintokogio Ltd
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Sintokogio Ltd
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Priority to JP2003153572A priority Critical patent/JP4284645B2/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a clamping device in which an upper and a lower molds are moved with a small force to an arbitrary position and clamped by solving the problems of heavy muscular work, low workability, and the like, in a molten metal casting line. <P>SOLUTION: The clamping device is provided with: a rail built along above the molten metal casting line; a plurality of supports which are hung on the rail and are movable to an arbitrary position and have a horizontal part; supporting arms provided movable vertically from the supports; mold pushers connected to the bottom ends of the supporting arms; chain wheels attached to both ends of the mold pushers; chain wheels with hooks, which are connected to the chain wheels with chains; a chain block, which is, with a chain, connected to one of the chain wheels with hooks; and a counter weight connected to the supporting arm through a chain. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、注湯ラインにおける枠なし鋳型、特に自硬性鋳型に注湯を行う際に利用する鋳型のクランプ装置に関する。
【０００２】
【従来の技術】
従来、ロ−ラコンベヤ等により注湯位置に搬入された枠なし鋳型、特に自硬性鋳型については注湯定盤上に載せた上下鋳型の上部に重錘を載せガイドピンで重錘の安定性を持たせるようにしている（例えば、特許文献１参照）。
【０００３】
【特許文献１】
特開平９−２３９４９２号公報（第１〜３頁、図１）
【０００４】
【発明が解決しようとする課題】
しかし上記特許文献に示す重錘載せ替えは、全て手作業で行われるのが一般的であり、重錘の重量が重く、鋳型が大きくなればなるほど重筋作業を余儀なくされている場合が多く、作業性が悪いものであった。
本発明は、上記の問題にかんがみてなされたもので、重筋作業、作業性が悪いなどの問題を解決できると共に小さな力で容易に注湯ラインの任意の位置に移動して、上下鋳型をクランプできる装置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】
上記の目的を達成するために本発明の注湯ラインにおける鋳型のクランプ装置は、注湯ライン上方に沿って架設されたレールと、該レールに懸架された任意の位置に移動でき水平部を有する複数の支持体と、該支持体から昇降可能に設けられた支持アームと、該支持アームの下端に接続された鋳型押えと、該鋳型押えの両端に設けられたチェーンホイールと、該チェーンホイールにチェーン連結されたフック付きチェーンホイールと、該フック付きチェーンホイールの一つにチェーン連結されたチェーンブロックと、を備えたことを特徴とする。
【０００６】
また、本発明の注湯ラインにおける鋳型のクランプ装置は、前記支持体に昇降可能に設けられ、前記支持アームに連結されて昇降させる昇降部材と、前記支持アーム及び前記鋳型押え及び前記フック付きチェーンホイール並びに前記チェーンブロックの昇降を補助する前記支持体に設けられたカウンターウェイトと、該カウンターウェイトと前記支持アームとを連結するチェーンと、を更に備えたことを特徴とする。
【０００７】
また、本発明の注湯ラインにおける鋳型のクランプ装置は、前記チェーンブロックのチェーン端部に張力吸収バネを設けたことを特徴とする。また、前記フック付きチェーンホイールにフックの上下位置を調整するスプリングを設けていることを特徴とする。
【０００８】
【発明の実施の形態】
以下本発明の実施の形態を図面に基づいて詳しく説明する。図１及び図２において注湯ライン１の外側に支持台２が並行に配置されており、該支持台２の上部には複数の逆Ｌ型の固定フレ−ム３、３が適当な間隔をおいて立設されている。該逆Ｌ型の固定フレ−ム３、３間の先端部下面には懸架用レ−ル４が注湯ライン１に沿って架設されている。
【０００９】
該懸架用レ−ル４にはロ−ラ４Ａを介して逆Ｌ型の支持体５が間隔をあけて複数個移動可能にして懸吊されており、該支持体５の水平部前後両端にホイ−ル６、６を備え、垂直部に昇降部材７を備えている。以下、図２のものを代表させて説明する。
該昇降部材７の前面には、注湯ライン１の中心部上方まで延びる支持ア−ム８が固着されており、該支持ア−ム８の先端下部には鋳型押え９の中心部がピン１０にて連結され、なおかつ支持ア−ム８の該昇降部材７寄り位置と該鋳型押え９間をバネピン１１で一定範囲内で伸縮できるようにして連結されている。
【００１０】
また前記鋳型押え９の両端部にはホイ−ル１２、１２が備えられていると共に前記昇降部材７寄り端部に張力吸収バネ１３を固着し、該張力吸収バネ１３の下端より、フックの上下位置を調整可能にしたフック付きチェ−ンホイ−ル１５及び前記鋳型押え９の２個のホイ−ル１２、１２並びに上下位置を調整可能にしたフック付きホイ−ル１６と連結されたチェーン１４を付属したチェ−ンブロック１７を備えている。なお注湯ライン１にはローラコンベヤ１８上に鋳型定盤１９が枠なしの鋳型２０、２１を型合せした状態で搬入、搬出される。
【００１１】
このように構成されたものは、前記チェ−ンブロック１７をゆるめて前記鋳型押え９を軽く手作業で押し上げて、前記支持体５の垂直部に設けられる図示しないカウンターウェイトと前記支持アーム８を該支持体５の水平部前後両端に設けられたホイ−ル６、６を介してチェーン７Ａにて連結することによりバランスを取りながら上方で停止させた状態にする。次ぎに注湯ライン１から鋳型定盤１９上に型合せされた鋳型２０、２１が搬入されてくる。
【００１２】
作業者は鋳型押え９を軽く押し下げて鋳型２０の上面に載置した後、前記フック付きチェ−ンホイ−ル１５のフックを鋳型定盤１９下面に引掛け、さらに前記フック付きホイ−ル１６のフックを鋳型定盤１９下面に掛けた後、チェ−ンブロック１７を操作してチェ−ン１４を締め付けてゆき、図示されないバネ変位量ゲ−ジで前記張力吸収バネ１３が若干伸びたことを確認してチェ−ンブロック１７を固定する。なお、該フック付きチェーンホイール１５のフックは常時はスプリングにより鋳型定盤１９の下面より下側に押し下げられ、チェ−ンブロック１７を操作してチェ−ン１４を締め付けることにより、引き上げられて注湯定盤１９の下面に引っかかるようになっている。
【００１３】
これにより型合わせされた鋳型２０、２１は、鋳型定盤１９と鋳型押え９によりクランプされた状態になる。また注湯後、はりけ、鋳型膨張等により鋳型が変形し鋳型高さが高くなることによるチェ−ン１４張力の上昇があっても張力吸収バネ１３で吸収することができ、チェ−ン１４張力が必要以上にならないようになっている。
【００１４】
次にクランプされた鋳型２０、２１に対し注湯が行われ、所定時間冷却された後、チェ−ンブロック１７をゆるめてクランプを解除し、作業者が鋳型押え９を軽く押し上げる。さらにローラコンベヤ１８上の注湯済の鋳型２０、２１を鋳型定盤１９と共に図示されない冷却ラインに搬出し、新しい鋳型２０、２１を載せた鋳型定盤１９がローラコンベヤ１８上に搬入されてくる。以上の作動を繰り返し行うものである。
【００１５】
【発明の効果】
上記の説明から明らかなように、本発明の注湯ラインにおける鋳型のクランプ装置は、注湯ライン上方に沿って架設されたレールと、該レールに懸架された任意の位置に移動でき水平部を有する複数の支持体と、該支持体から昇降可能に設けられた支持アームと、該支持アームの下端に接続された鋳型押えと、該鋳型押えの両端に設けられたチェーンホイールと、該チェーンホイールにチェーン連結されたフック付きチェーンホイールと、該フック付きチェーンホイールの一つにチェーン連結されたチェーンブロックと、を備えたことから、鋳型押え、チェ−ンブロック等の重量物をチェーンを用いて移動及び取り扱いができ、鋳型の大小を問わず鋳型をクランプできる。またカウンターウェイトの介在により上記重量物を軽く取り扱うことができる。さらに張力吸収バネの介在により鋳型の膨張によるチェ−ンの張力を吸収でき鋳型の型崩れを防ぐことができる。また鋳型押えは中央部でピンにて支持することにより、型の高さ寸法誤差による鋳型上面の傾斜に追従して鋳型がクランプされる等の優れた効果がある。
【図面の簡単な説明】
【図１】注湯ライン全体を示す平面図である。
【図２】図１におけるＡ−Ａ矢視図である。
【図３】図２におけるＢ−Ｂ矢視図である。
【符号の説明】
１ 注湯ライン
４ 懸架用レ−ル
４Ａ ロ−ラ
５ 支持体
７ 昇降部材
７Ａ チェ−ン
８ 支持ア−ム
９ 鋳型押え
１１ バネピン
１３ 張力吸収バネ
１４ チェ−ン
１５ フック付きチェ−ンホイ−ル
１６ フック付きホイ−ル
１７ チェ−ンブロック
１８ ローラコンベヤ
１９ 鋳型定盤
２０ ２１ 鋳型[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a mold clamping device used for pouring a frameless mold in a pouring line, particularly a self-hardening mold.
[0002]
[Prior art]
Conventionally, for frameless molds, especially self-hardening molds, which have been brought into the pouring position by a roller conveyor, etc., the weight is placed on the upper part of the upper and lower molds placed on the pouring platen, and the stability of the weight is guided by the guide pins. (For example, see Patent Document 1).
[0003]
[Patent Document 1]
JP-A-9-239492 (pages 1-3, FIG. 1)
[0004]
[Problems to be solved by the invention]
However, the replacement of the weight shown in the above-mentioned patent document is generally all performed manually, and the weight of the weight is heavy, and in many cases, the larger the mold is, the more it is obliged to perform the heavy muscle work, Workability was poor.
The present invention has been made in view of the above problems, and can solve problems such as heavy muscular work and poor workability, and can be easily moved to an arbitrary position of a pouring line with a small force to remove the upper and lower molds. It is an object to provide a device that can be clamped.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, a mold clamping device in a pouring line of the present invention has a rail erected along the pouring line, and a horizontal portion movable to an arbitrary position suspended on the rail. A plurality of supports, a support arm provided so as to be able to ascend and descend from the support, a mold retainer connected to a lower end of the support arm, chain wheels provided at both ends of the mold retainer, A chain wheel with a hook connected to a chain, and a chain block connected to one of the chain wheels with a hook are provided.
[0006]
Further, the mold clamping device in the pouring line of the present invention is provided with an elevating member that is provided on the support so as to be able to move up and down, and that is connected to the support arm to move up and down, the support arm, the mold holder, and the chain with the hook. It further comprises a counterweight provided on the support for assisting the lifting of the wheel and the chain block, and a chain connecting the counterweight and the support arm.
[0007]
Further, the mold clamping apparatus in the pouring line of the present invention is characterized in that a tension absorbing spring is provided at a chain end of the chain block. Further, the chain wheel with the hook is provided with a spring for adjusting a vertical position of the hook.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 1 and 2, a support 2 is arranged in parallel outside the pouring line 1, and a plurality of inverted L-shaped fixed frames 3, 3 are provided above the support 2 at appropriate intervals. It is erected. A suspension rail 4 is provided along the pouring line 1 on the lower surface of the distal end portion between the inverted L-shaped fixed frames 3 and 3.
[0009]
A plurality of inverted L-shaped supports 5 are suspended on the suspension rail 4 via rollers 4A so as to be movable at intervals, and are provided at both front and rear ends of the horizontal portion of the support 5. Wheels 6 are provided, and an elevating member 7 is provided at a vertical portion. Hereinafter, a description will be given with reference to FIG.
A support arm 8 extending above the center of the pouring line 1 is fixed to the front surface of the elevating member 7, and the lower end of the support arm 8 is provided with a pin In addition, the support arm 8 is connected so as to be able to expand and contract within a certain range by a spring pin 11 between a position of the support arm 8 near the elevating member 7 and the mold presser 9.
[0010]
Wheels 12 and 12 are provided at both ends of the mold retainer 9 and a tension absorbing spring 13 is fixed to an end near the elevating member 7. A chain wheel 15 with a hook whose position can be adjusted, two wheels 12 and 12 of the mold holder 9 and a chain 14 connected with a wheel 16 with a hook whose vertical position can be adjusted. An attached chain block 17 is provided. In addition, a mold platen 19 is carried into and out of the pouring line 1 in a state where molds 20 and 21 without frames are matched on a roller conveyor 18.
[0011]
With this structure, the chain block 17 is loosened and the mold holder 9 is lightly pushed up by hand to remove the counter weight (not shown) provided on the vertical portion of the support 5 and the support arm 8. The support 5 is connected to a chain 7A via wheels 6, 6 provided at both front and rear ends of the horizontal portion, so that the support 5 is stopped above while maintaining balance. Next, the molds 20 and 21 matched on the mold platen 19 are carried in from the pouring line 1.
[0012]
The operator presses down the mold retainer 9 lightly and places it on the upper surface of the mold 20, then hooks the hook of the chain wheel 15 with hook on the lower surface of the mold platen 19, and further moves the wheel 16 with hook. After hooking the hook on the lower surface of the mold platen 19, the chain block 17 is operated to tighten the chain 14, and the tension absorbing spring 13 is slightly extended by a spring displacement gauge (not shown). After confirmation, the chain block 17 is fixed. The hook of the chain wheel 15 with a hook is normally pushed down from the lower surface of the mold platen 19 by a spring, and is pulled up by operating the chain block 17 to tighten the chain 14. It is configured to be caught on the lower surface of the hot water table 19.
[0013]
Thus, the matched molds 20 and 21 are clamped by the mold platen 19 and the mold holder 9. Further, after pouring, even if there is an increase in the tension of the chain 14 due to deformation of the mold due to lamination or mold expansion and the height of the mold is increased, the tension absorbing spring 13 can absorb the tension. The tension is not exceeded.
[0014]
Next, the clamped molds 20 and 21 are poured and cooled for a predetermined time. Then, the chain block 17 is loosened to release the clamp, and the worker presses the mold holder 9 lightly. Further, the poured molds 20 and 21 on the roller conveyor 18 are carried out together with the mold base 19 to a cooling line (not shown), and the mold base 19 on which new molds 20 and 21 are placed is carried into the roller conveyor 18. . The above operation is repeatedly performed.
[0015]
【The invention's effect】
As is clear from the above description, the mold clamping device in the pouring line of the present invention has a rail erected along the pouring line and a horizontal part that can be moved to any position suspended on the rail. A plurality of supports, a support arm provided to be able to move up and down from the support, a mold holder connected to a lower end of the support arm, chain wheels provided at both ends of the mold holder, and the chain wheel Since a chain wheel with a hook connected to a chain and a chain block connected to one of the chain wheels with a hook are provided, a heavy object such as a mold retainer, a chain block, etc. The mold can be moved and handled, and the mold can be clamped regardless of the size of the mold. In addition, the heavy object can be handled lightly by the interposition of the counterweight. In addition, the tension absorbing spring can absorb the tension of the chain due to the expansion of the mold, thereby preventing the mold from collapsing. Further, since the mold retainer is supported by the pin at the center, there is an excellent effect that the mold is clamped following the inclination of the mold upper surface due to a height error of the mold.
[Brief description of the drawings]
FIG. 1 is a plan view showing an entire pouring line.
FIG. 2 is a view taken in the direction of arrows AA in FIG. 1;
FIG. 3 is a view taken in the direction of arrows BB in FIG. 2;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Pouring line 4 Suspension rail 4A Roller 5 Support 7 Lifting member 7A Chain 8 Support arm 9 Mold holder 11 Spring pin 13 Tension absorbing spring 14 Chain 15 Chain wheel with hook Reference Signs List 16 Wheel with hook 17 Chain block 18 Roller conveyor 19 Mold platen 20 21 Mold

Claims (6)

注湯ライン上方に沿って架設されたレールと、該レールに懸架された任意の位置に移動でき水平部を有する複数の支持体と、該支持体から昇降可能に設けられた支持アームと、該支持アームの下端に接続された鋳型押えと、該鋳型押えの両端に設けられたチェーンホイールと、該チェーンホイールにチェーン連結されたフック付きチェーンホイールと、該フック付きチェーンホイールの一つにチェーン連結されたチェーンブロックと、を備えたことを特徴とする注湯ラインにおける鋳型のクランプ装置。A rail erected along the top of the pouring line, a plurality of supports having a horizontal portion movable to an arbitrary position suspended on the rail, a support arm provided to be able to move up and down from the support, A mold retainer connected to the lower end of the support arm, chain wheels provided at both ends of the mold retainer, a chain wheel with a hook connected to the chain wheel, and a chain connected to one of the chain wheels with the hook A mold clamping device for a pouring line, comprising: a chain block; 前記支持体に昇降可能に設けられ、前記支持アームに連結されて昇降させる昇降部材と、前記支持アーム及び前記鋳型押え及び前記フック付きチェーンホイール並びに前記チェーンブロックの昇降を補助する前記支持体に設けられたカウンターウェイトと、該カウンターウェイトと前記支持アームとを連結するチェーンと、を更に備えたことを特徴とする請求項１記載の注湯ラインにおける鋳型のクランプ装置。An elevating member which is provided on the support so as to be able to ascend and descend, and which is connected to the support arm to elevate the elevating member; The mold clamping device for a pouring line according to claim 1, further comprising a counter weight provided, and a chain connecting the counter weight and the support arm. 前記チェーンブロックのチェーン端部に張力吸収バネを設けたことを特徴とする請求項１または請求項２記載の注湯ラインにおける鋳型のクランプ装置。3. The mold clamping apparatus according to claim 1, wherein a tension absorbing spring is provided at a chain end of the chain block. 前記フック付きチェーンホイールにフックの上下位置を調整するスプリングを設けていることを特徴とする請求項１から請求項３のいずれかに記載の注湯ラインにおける鋳型のクランプ装置。The apparatus for clamping a mold in a pouring line according to any one of claims 1 to 3, wherein a spring for adjusting a vertical position of the hook is provided on the chain wheel with the hook. 注湯ラインの上方に沿って架設されたレ−ルと、該レ−ルにロ−ラを介して複数懸吊された水平部を有する支持体と、該支持体の垂直部に昇降可能に配された昇降部材と、該昇降部材の前面に設けられた支持アームと、該支持ア−ムの先端下部を中心に揺動可能に支持された鋳型押えと、該鋳型押えの一端に固着された張力吸収バネと、該張力吸収バネにチェーン連結され、昇降調整可能にしたフック付きチェ−ンホイ−ルと、前記張力吸収バネ及び前記フック付きチェ−ンホイ−ル及び前記鋳型押え並びにフック付きホイ−ルを通って連結されたチェーンを付属したチェ−ンブロックと、を具備したことを特徴とする注湯ラインにおける鋳型のクランプ装置。A rail extending along a pouring line, a support having a plurality of horizontal portions suspended from the rail via rollers, and a vertically movable portion of the support. An elevating member arranged, a support arm provided on the front surface of the elevating member, a mold holder supported swingably around a lower end of the support arm, and fixed to one end of the mold holder. A tension-absorbing spring, a chain wheel with a hook connected to the tension-absorbing spring in a chain and adjustable in elevation, the tension-absorbing spring, the chain wheel with a hook, the mold retainer, and a wheel with a hook. A chain block attached with a chain connected through a pipe, and a mold clamping device for a pouring line. 注湯ライン１の外側上方に沿って架設された懸架用レ−ル４と、該懸架用レ−ル４にロ−ラ４Ａを介して複数懸吊された逆Ｌ型の支持体５と、各支持体５、５の水平部両端に設けられたホイ−ル６、６と、前記支持体５の垂直部に昇降可能に配された昇降部材７と、該昇降部材７の前面に注湯ラインの中心まで延びるように設けられた支持アーム８と、前記支持体５に配されたカウンターウェイトから支持ア−ム８の上面中心にわたって、掛け回すチェ−ン７Ａと、前記支持ア−ム８の先端下部を中心にその両端にホイ−ル１２、１２を設け、揺動可能に支持された鋳型押え９と、該鋳型押え９の前記昇降部材７寄り端部に固着された張力吸収バネ１３と、該張力吸収バネ１３の下端に配された昇降調整可能にしたフック付きチェ−ンホイ−ル１５と、前記張力吸収バネ１３及び前記フック付きチェ−ンホイ−ル１５及び前記鋳型押え９の２個のホイ−ル１２、１２並びにフック付きホイ−ル１６を通って終端に取り付けられたチェーン１４を付属したチェ−ンブロック１７と、を具備したことを特徴とする注湯ラインにおける鋳型のクランプ装置。A suspension rail 4 erected along the outside and upper side of the pouring line 1, an inverted L-shaped support body 5 suspended from the suspension rail 4 by a plurality of rollers 4A, Wheels 6, 6 provided at both ends of a horizontal portion of each of the supports 5, 5, an elevating member 7 arranged to be able to ascend and descend in a vertical portion of the support 5, and pouring a front surface of the elevating member 7 A support arm 8 provided to extend to the center of the line; a chain 7A extending from a counterweight disposed on the support 5 to the center of the upper surface of the support arm 8; Wheels 12 and 12 are provided at both ends of the lower end of the mold, and the mold presser 9 is supported so as to be swingable, and a tension absorbing spring 13 fixed to an end of the mold presser 9 near the elevating member 7. And a chain hoist with a hook disposed at the lower end of the tension absorbing spring 13 and capable of adjusting up and down. A chain 14 attached to the end through the tension absorbing spring 13, the chain wheel 15 with hook, the two wheels 12, 12 of the mold holder 9, and the wheel 16 with hook. And a chain block 17 to which a mold is attached in a pouring line.
JP2003153572A 2003-05-30 2003-05-30 Mold clamping device in pouring line Expired - Fee Related JP4284645B2 (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7768221B2 (en) 2006-06-02 2010-08-03 Power Efficiency Corporation Method, system, and apparatus for controlling an electric motor
US8723488B2 (en) 2007-08-13 2014-05-13 The Powerwise Group, Inc. IGBT/FET-based energy savings device for reducing a predetermined amount of voltage using pulse width modulation
US8823314B2 (en) 2007-09-14 2014-09-02 The Powerwise Group, Inc. Energy saving system and method for devices with rotating or reciprocating masses
US9240745B2 (en) 2009-09-08 2016-01-19 The Powerwise Group, Inc. System and method for saving energy when driving masses having periodic load variations
US9716449B2 (en) 2007-09-14 2017-07-25 The Powerwise Group, Inc. Energy saving system and method for devices with rotating or reciprocating masses

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7768221B2 (en) 2006-06-02 2010-08-03 Power Efficiency Corporation Method, system, and apparatus for controlling an electric motor
US8723488B2 (en) 2007-08-13 2014-05-13 The Powerwise Group, Inc. IGBT/FET-based energy savings device for reducing a predetermined amount of voltage using pulse width modulation
US9716431B2 (en) 2007-08-13 2017-07-25 The Powerwise Group, Inc. IGBT/FET-based energy savings device for reducing a predetermined amount of voltage using pulse width modulation
US8823314B2 (en) 2007-09-14 2014-09-02 The Powerwise Group, Inc. Energy saving system and method for devices with rotating or reciprocating masses
US9628015B2 (en) 2007-09-14 2017-04-18 The Powerwise Group, Inc. Energy saving system and method for devices with rotating or reciprocating masses
US9716449B2 (en) 2007-09-14 2017-07-25 The Powerwise Group, Inc. Energy saving system and method for devices with rotating or reciprocating masses
US9240745B2 (en) 2009-09-08 2016-01-19 The Powerwise Group, Inc. System and method for saving energy when driving masses having periodic load variations

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