High vacuum gate valve having improved metal vacuum joint

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 4718637
SERIAL NO

07040198

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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A two part high vacuum gate valve construction includes a control mechanism part having a limited displacement stem passing through a first generally rectangular high vacuum flange and a valve body part including a generally rectangular case, a second generally rectangular high vacuum joint providing flange having a mirror image sealing geometry to the first high vacuum flange, two machined fluid flow flanges passing through openings defined through opposite sidewalls of said case and sealed thereto, at least one of the fluid flow flanges having an inside gate sealing surface machined prior to insertion through and sealing of the flange to the sidewall of the case; a two part, levered carriage having a central transverse pivot joint and having an endwall engagement mechanims for causing the pivot joint to pivot toward the inside gate sealing surface of the one flow flange in response to continued actuation force supplied by the control stem shaft after an inside endwall of said case has been contacted; a valve gate having a sealing surface for engaging the inside gate sealing surface of the one flow flange when the carriage means is opposite the other flow flange the gate being pivotally attached to the carriage at the central transverse pivot joint, a double jointed linkage assembly having one link part pivotally fixed to the second flange and linked to the control stem shaft for double jointed arcuate movement as the shaft is moved along its locus of rectilinear limited displacement, and having a second link part linked to the first link part and to the carriage means, for levering actuation force supplied by the central stem shaft to the carriage thereby to cause the gate to close and then to seal.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
MDC VACUUM PRODUCTS, LLCHAYWARD, CA1

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Contin, Jose L Orinda, CA 5 94

Cited Art Landscape

Patent Info (Count) # Cites Year
 
Thermionics Laboratories, Inc. (1)
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JOHNSTON PUMP/GENERAL VALVE, INC. (1)
* 4491145 Toggle gate valve 7 1982
* Cited By Examiner

Patent Citation Ranking

Forward Cite Landscape

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ASM JAPAN K.K. (1)
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Other [Check patent profile for assignment information] (6)
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6896239 Method and apparatus for locking a valve 9 2003
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Kimball Physics, Inc. (6)
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KITZ SCT CORPORATION (1)
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National University Corporation (1)
9793135 Method of cyclic dry etching using etchant film 0 2016
 
SMC CORPORATION (1)
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MDC VACUUM PRODUCTS, LLC (1)
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9812320 Method and apparatus for filling a gap 0 2016
 
Unaxis Trading AG (1)
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ASM America, Inc. (1)
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Irie Koken Co., Ltd. (1)
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TELEYDYNE EPSILON, INC. (1)
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VAT HOLDING AG (1)
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NEC CORPORATION (1)
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MDC VACUUM PRODUCTS CORPORATION (1)
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KING LAI HYGIENIC MATERIALS CO., LTD (1)
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ETS J.C. COUREAU, A FRENCH CORP. (1)
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* Cited By Examiner