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公开(公告)号：US10806440B2
公开(公告)日：2020-10-20
申请号：US16538116
申请日：2019-08-12
申请人： Surendra K. Chawla
发明人： Surendra K. Chawla
摘要： A hands-free mitral papillary muscle exposure device provides a clear view of the papillary muscles, including the pathology of the leaflets and chordae tendineae of a mitral valve apparatus, and comprises a retractor device comprises two arm members pivotally connected to one another which can be manually spread and adjusted about a pivot point to a desired arrangement relative to the mitral valve apparatus to prevent injury to surrounding muscle and tissue during an operative procedure. Each arm member includes a respective downwardly extending longitudinal projection to hold one of the anterior and posterior leaflets adjacent to said arm member when the retractor device is positioned relative to the mitral valve apparatus. The longitudinal projection on the anterior side of the retractor device is longer than the corresponding longitudinal projection on the posterior side to accommodate the longer size of the anterior leaflet in comparison with the posterior leaflet.
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公开(公告)号：US09248018B2
公开(公告)日：2016-02-02
申请号：US14039568
申请日：2013-09-27
申请人： Surendra K. Chawla
发明人： Surendra K. Chawla
IPC分类号： A61F2/24
CPC分类号： A61F2/2457
摘要： A valve repair device and method of repair for the mitral valve of the heart is disclosed. The valve repair device includes a leaflet portion, a muscle portion, and a plurality of chords connecting the leaflet portion to the muscle portion. The leaflet portion includes a plurality of partition members to assist the surgeon in sizing the repair device to the patient. A single partition member may form the leaflet portion. Alternatively, multiple partition members may form the leaflet portion. A partition member may include predetermined openings for the attachment of a suture.
摘要翻译： 公开了一种瓣膜修复装置及心脏二尖瓣修复方法。 瓣膜修复装置包括小叶部分，肌肉部分和将小叶部分连接到肌肉部分的多个和弦。 小叶部分包括多个分隔构件，以帮助外科医生将修复装置调整到患者体内。 单个分隔构件可以形成小叶部分。 或者，多个分隔构件可以形成小叶部分。 分隔构件可以包括用于附接缝合线的预定开口。
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公开(公告)号：US5323829A
公开(公告)日：1994-06-28
申请号：US997061
申请日：1992-12-28
申请人： Joseph K. Hubbell , Perry W. Bell , David L. Bair , Surendra K. Chawla , Mahmoud; C. Assaad , Warren L. Croyle , Joanne E. Shaw , Donald G. Vera
发明人： Joseph K. Hubbell , Perry W. Bell , David L. Bair , Surendra K. Chawla , Mahmoud; C. Assaad , Warren L. Croyle , Joanne E. Shaw , Donald G. Vera
CPC分类号： B60C9/0042 , B60C15/06 , B60C9/26 , Y10T152/10828 , Y10T152/10864
摘要： A pneumatic tire with carbon fiber cord reinforcement wherein the carbon fiber cords have a round cross sectional shape and a twist per inch (TPI) of 1.2 to 1.6 turns per inch (TPI) is provided. Preferably, the carbon fiber cords are coated with an RFL or epoxy/RFL adhesive. It is also preferred that carbon fiber cords having an S twist and carbon fiber cords having a Z twist be used in the same reinforcing plies in the tire. Especially preferred is the incorporation of carbon fiber cords in a folded belt.
摘要翻译： 一种具有碳纤维帘线加强件的充气轮胎，其中碳纤维帘线具有圆形横截面形状，并且提供每英寸1.2-1.6匝（TPI）的英寸扭转（TPI）。 优选地，碳纤维帘线涂覆有RFL或环氧树脂/ RFL粘合剂。 也优选在轮胎中的相同加强层中使用具有S捻的碳纤维帘线和具有Z捻的碳纤维帘线。 特别优选的是将碳纤维帘线结合在折叠带中。
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4.发明授权
公开(公告)号：US4682892A
公开(公告)日：1987-07-28
申请号：US770937
申请日：1985-08-30
申请人： Surendra K. Chawla
发明人： Surendra K. Chawla
CPC分类号： G01B9/02098 , G01B11/162 , G01B9/02095
摘要： A nondestructive means of testing tires for subsurface defects by speckle-shearing interferometry. The tire is illuminated with a beam of coherent light. The light reflected from a surface of the tire is directed through a converging lens having one-half of one of its surfaces covered by a transparent plate having flat parallel sides such that a photographic media is exposed to a first pair of focused images of the tire displaced with respect to one another. The tire is then subjected to a stress, and a second pair of slightly displaced images is recorded on the same photographic media. The photographic media is developed to form a transparency, and then a first surface of the developed photographic media is illuminated with a collimated white light source. Interference fringes that are observed by viewing the opposite surface of the photographic media may then be analyzed.
摘要翻译： 通过斑点剪切干涉法测试地下缺陷的轮胎的非破坏性手段。 轮胎用相干光束照射。 从轮胎的表面反射的光被引导通过会聚透镜，该会聚透镜的一半表面由具有平坦平行侧面的透明板覆盖，使得照相介质暴露于轮胎的第一对聚焦图像 相互移动。 然后使轮胎受到应力，并且在相同的照相介质上记录第二对稍微移动的图像。 将照相介质显影以形成透明体，然后用准直的白色光源照射显影的照相介质的第一表面。 然后可以分析通过观察照相介质的相对表面观察到的干涉条纹。
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公开(公告)号：US20150094800A1
公开(公告)日：2015-04-02
申请号：US14039568
申请日：2013-09-27
申请人： Surendra K. Chawla
发明人： Surendra K. Chawla
IPC分类号： A61F2/24
CPC分类号： A61F2/2457
摘要： A valve repair device and method of repair for the mitral valve of the heart is disclosed. The valve repair device includes a leaflet portion, a muscle portion, and a plurality of chords connecting the leaflet portion to the muscle portion. The leaflet portion includes a plurality of partition members to assist the surgeon in sizing the repair device to the patient. A single partition member may form the leaflet portion. Alternatively, multiple partition members may form the leaflet portion. A partition member may include predetermined openings for the attachment of a suture.
摘要翻译： 公开了一种瓣膜修复装置及心脏二尖瓣修复方法。 瓣膜修复装置包括小叶部分，肌肉部分和将小叶部分连接到肌肉部分的多个和弦。 小叶部分包括多个分隔构件，以帮助外科医生将修复装置调整到患者体内。 单个分隔构件可以形成小叶部分。 或者，多个分隔构件可以形成小叶部分。 分隔构件可以包括用于附接缝合线的预定开口。
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公开(公告)号：US5225448A
公开(公告)日：1993-07-06
申请号：US978616
申请日：1992-11-19
CPC分类号： C08J3/16 , C08J9/28 , C08J2367/02
摘要： High molecular weight polyethyleneterephthalate resin is currently being used in vast quantities in manufacturing tire cord and in manufacturing trays for frozen foods which can be heated in either microwave or convection ovens. In some applications polyester resins having ultra-high molecular weights are required. For example, some techniques for producing polyester yarn by solution spinning demand ultra-high molecular weight polyester. Unfortunately, it becomes progressively more difficult and expensive to produce polyester resins having higher and higher molecular weights utilizing standard commercial polymerization techniques. This invention discloses a technique for preparing porous polyester beads which can be solid state polymerized very rapidly to ultra-high molecular weights. This invention more specifically discloses a process for preparing ultra-high molecular weight polyester resin which comprises: (1) dissolving a polyester prepolymer in a suitable organic solvent to produce a polyester prepolymer solution; (2) allowing droplets of the polyester prepolymer solution to drip into a coagulation bath to produce porous polyester beads; (3) recovering the porous polyester beads from the coagulation bath; (4) removing residual organic solvent from the porous beads; and (5) solid state polymerizing the porous polyester beads at an elevated temperature to produce the ultra-high molecular weight polyester resin.
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公开(公告)号：US20130013056A1
公开(公告)日：2013-01-10
申请号：US13176127
申请日：2011-07-05
申请人： Surendra K. Chawla
发明人： Surendra K. Chawla
IPC分类号： A61F2/24
CPC分类号： A61F2/2457 , A61F2/2463 , A61F2/2466
摘要： A valve repair instrument and method of repair for the mitral valve of the heart is disclosed. The valve repair instrument includes an elongated body having two ends. One of the ends being configured to maintain a muscle portion of a valve repair device in an expanded position for attachment to the papillary muscle, the other end being configured to maintain a leaflet portion of a valve repair device in an expanded position for attachment to a valve leaflet. The valve repair device is attached to the diseased valve by suturing the leaflet portion to the affected leaflet and suturing the muscle portion to the affected muscle.
摘要翻译： 公开了一种瓣膜修复仪及心脏二尖瓣修复方法。 瓣膜修复器包括具有两端的细长体。 其中一个端部构造成将瓣膜修复装置的肌肉部分维持在用于附着到乳头肌的扩张位置，另一端构造成将瓣膜修复装置的小叶部分维持在扩展位置，以便附接到 阀门传单。 瓣膜修复装置通过将小叶部分缝合到受影响的小叶上并将肌肉部分缝合到受影响的肌肉而附接到患病瓣膜。
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公开(公告)号：US5240566A
公开(公告)日：1993-08-31
申请号：US986201
申请日：1992-12-07
摘要： A process for separating acetone, dichloromethane and trifluoroacetic acid from a mixture of acetone, dichloromethane, and a trifluoroacetic acid/acetone azeotropeby (1) fractionally distilling the mixture of acetone, dichloromethane, and the trifluoroacetic acid/acetone azeotrope;(2) fractionally distilling the mixture of the trifluoroacetic acid/acetone azeotrope and free acetone;(3) adding at least about 16 parts of water to the trifluoroacetic acid/acetone azeotrope per 100 parts by volume of the trifluoroacetic acid/acetone azeotrope;(4) fractionally distilling the mixture of free acetone and the water/trifluoroacetic acid azeotrope;(5) adding at least about 10 parts of sulfuric acid to the water/trifluoroacetic acid azeotrope per 100 parts by volume of the water/trifluoroacetic acid azeotrope;(6) fractionally distilling the mixture of trifluoroacetic acid and the water/sulfuric acid complex.
摘要翻译： （1）分批蒸馏丙酮，二氯甲烷和三氟乙酸/丙酮共沸物的混合物，从丙酮，二氯甲烷和三氟乙酸/丙酮共沸物的混合物中分离丙酮，二氯甲烷和三氟乙酸的方法; （2）分馏三氟乙酸/丙酮共沸物与游离丙酮的混合物; （3）每100份体积的三氟乙酸/丙酮共沸物向三氟乙酸/丙酮共沸物中加入至少约16份水; （4）分级蒸馏游离丙酮和水/三氟乙酸共沸混合物; （5）每100份体积的水/三氟乙酸共沸物向水/三氟乙酸共沸物中加入至少约10份硫酸; （6）对三氟乙酸和水/硫酸络合物的混合物进行分馏。
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公开(公告)号：US20200060670A1
公开(公告)日：2020-02-27
申请号：US16538116
申请日：2019-08-12
申请人： Surendra K. Chawla
发明人： Surendra K. Chawla
摘要： A hands-free mitral papillary muscle exposure device provides a clear view of the papillary muscles, including the pathology of the leaflets and chordae tendineae of a mitral valve apparatus, and comprises a retractor device comprises two arm members pivotally connected to one another which can be manually spread and adjusted about a pivot point to a desired arrangement relative to the mitral valve apparatus to prevent injury to surrounding muscle and tissue during an operative procedure. Each arm member includes a respective downwardly extending longitudinal projection to hold one of the anterior and posterior leaflets adjacent to said arm member when the retractor device is positioned relative to the mitral valve apparatus. The longitudinal projection on the anterior side of the retractor device is longer than the corresponding longitudinal projection on the posterior side to accommodate the longer size of the anterior leaflet in comparison with the posterior leaflet.
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公开(公告)号：US06997950B2
公开(公告)日：2006-02-14
申请号：US10345750
申请日：2003-01-16
申请人： Surendra K. Chawla
发明人： Surendra K. Chawla
IPC分类号： A61F2/24
CPC分类号： A61F2/2463 , A61F2/2457
摘要： A valve repair device and method of repair for the mitral valve of the heart is disclosed. The valve repair device includes a leaflet portion, a muscle portion, and a plurality of chords connecting the leaflet portion to the muscle portion. The valve repair device is attached to the diseased valve by suturing the leaflet portion to the affected leaflet and suturing the muscle portion to the affected muscle. The leaflet portion and muscle portion are constructed of cloth made from expanded polytetraflouroethylene. The chords are sutures also constructed from expanded polytetraflouroethylene. The suture position for the muscle portion is determined by positioning the valve repair device adjacent to a normal marginal chord. The valve repair device may be employed to repair the anterior leaflet or posterior leaflet of the mitral valve.
摘要翻译： 公开了一种瓣膜修复装置及心脏二尖瓣修复方法。 瓣膜修复装置包括小叶部分，肌肉部分和将小叶部分连接到肌肉部分的多个和弦。 瓣膜修复装置通过将小叶部分缝合到受影响的小叶上并将肌肉部分缝合到受影响的肌肉而附接到患病瓣膜。 小叶部分和肌肉部分由膨胀聚四氟乙烯制成的布构成。 弦也是由扩展的聚四氟乙烯构成的缝合线。 肌肉部分的缝合位置通过将瓣膜修复装置定位成与正常边缘弦相邻来确定。 瓣膜修复装置可用于修复二尖瓣的前小叶或后叶。
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