公开(公告)号：US20080121296A1

公开(公告)日：2008-05-29

申请号：US11590298

申请日：2006-10-31

Applicant: Erich J. Vorenkamp ,  James J. Kempf ,  Richard V. Rich ,  Gregory S. Green

Inventor： Erich J. Vorenkamp ,  James J. Kempf ,  Richard V. Rich ,  Gregory S. Green

IPC: F16K47/08

CPC classification number: F02D9/14 ,  F02M35/10045 ,  F02M35/10354 ,  F02M35/104 ,  Y10T137/86759

Abstract: A slide valve for use in an air intake manifold is disclosed, wherein a durability of the valve and a quality of a seal created while the valve is in a closed position are maximized, and a cost and a weight of the valve are minimized.

Abstract translation: 公开了一种用于进气歧管的滑阀，其中阀的耐久性和阀处于关闭位置时形成的密封件的质量最大化，并且阀的成本和重量最小化。

公开(公告)号：US07328693B2

公开(公告)日：2008-02-12

申请号：US10942264

申请日：2004-09-16

Applicant: James J. Kempf

Inventor： James J. Kempf

IPC: F41B5/12 ,  F41B5/10

CPC classification number: F41B5/123

Abstract: The nature of the current invention is an archery device that uses what I claim as Reverse Draw Technology. In essance, what this is, is pulling the launch string of a bow or crossbow in the opposite direction that it is pulled in all prior art. Pulling the launch string into the curve of the opposing limbs, instead of away from them, allows for a longer power stroke, thus increasing performance and allowing, if so chosen, a lower draw weight, which translates to less noise at the same arrow speed. Arrow speed is determined by the force required to pull the launch string from an at rest position to the ready to fire position, and the distance the string is pulled. This distance is called the power stroke. By increasing the power stroke and decreasing the drawing force, comparable arrow speed is achieved with much less noise and effort on the part of the archer.

Abstract translation: 本发明的性质是使用所谓的反向拉拔技术的射箭装置。 从本质上讲，这是在所有现有技术中拉起弓箭或弩的发射弦杆的方向相反的方向。 将发射弦线拉回到相对的四肢的曲线中，而不是远离它们，允许更长的动力冲程，从而提高性能，并允许如果这样选择较低的牵引重量，这在相同的箭头速度下转化为更少的噪音 。 箭头速度由将发射弦从静止位置拉到准备就绪位置所需的力以及弦被拉动的距离来确定。 该距离称为动力冲程。 通过增加动力行程并降低拉力，实现了相当的箭头速度，而弓箭手的噪音和精力要少得多。

公开(公告)号：US07174884B2

公开(公告)日：2007-02-13

申请号：US11029878

申请日：2005-01-05

Applicant: James J. Kempf ,  Lewis A. Van Winkle ,  Alan Van Winkle ,  Samel Collora

Inventor： James J. Kempf ,  Lewis A. Van Winkle ,  Alan Van Winkle ,  Samel Collora

IPC: F41B5/12

CPC classification number: F41B5/1469 ,  F41B5/105 ,  F41B5/123

Abstract: A crossbow having an improved firing assembly. The improved assembly attaches to a bowstring at a single point and draws the string back to have the string retained between a first string retainer and a second string retainer. By allowing the string to be drawn utilizing a single contact point on the bowstring as opposed to the prior art methods of dual engagement points with the bowstring, the cost, maintenance and undesired variance in string retention associated with the prior art are substantially eliminated.

Abstract translation: 具有改进的发射组件的弩。 改进的组件在单个点处附接到弓弦，并将琴弦拉回，以使琴弦保持在第一弦杆保持器和第二弦杆保持器之间。 通过允许使用弓弦上的单个接触点来绘制弦线，与现有技术的具有弓弦的双重接合点的方法相反，基本上消除了与现有技术相关联的琴弦保持的成本，维护和不希望的方差。

公开(公告)号：US20250130007A1

公开(公告)日：2025-04-24

申请号：US19003079

申请日：2024-12-27

Applicant: James J. Kempf

Inventor： James J. Kempf

IPC: F41B5/14 ,  F41B5/12

Abstract: A cranking mechanism preferably includes a planetary gear set, a drive shaft, a one way bearing, a clutch assembly, and at least one drive unit. The clutch preferably includes a clutch pressure plate, a flywheel, friction surfaces and at least one friction plate. Each drive unit includes a carrier, a spool and a flywheel. The one way bearing and the clutch assembly are axial on the drive shaft. A pressure locking nut is threaded on to a threaded end of the crank shaft to exert pressure on the clutch assembly. The sun gear is fixed on the drive shaft. The at least one drive unit is axial with the drive shaft, and fixed with the carrier of the planetary gear set. The pressure locking nut is tightened against the clutch assembly to frictionally engage the drive shaft with the at least one drive unit.

公开(公告)号：US10359254B1

公开(公告)日：2019-07-23

申请号：US16120565

申请日：2018-09-04

Applicant: James J. Kempf ,  Rex E. Isenhower ,  Dorge O. Huang

Inventor： James J. Kempf ,  Rex E. Isenhower ,  Dorge O. Huang

IPC: F41B5/18 ,  F41B5/14 ,  F41B5/12

Abstract: A crossbow with built in electric cocking preferably includes a motor, a drive device, a pair of carriage drive shafts and a pair of string carriages. The motor preferably includes a gearbox with an output shaft. The drive device includes a support frame and a drive shaft rotatably retained in the support frame. A drive gear is retained on one end of the drive shaft. An opposing end of the drive shaft is connected the output shaft. First and second carriage drive shafts each include a threaded drive shaft and a carriage drive gear retained on one end of the threaded drive shaft. The drive gear drives the carriage drive gear. First and second string carriages each include a string catch and a threaded tap. The threaded tap is sized to threadably receive the threaded drive shaft.

公开(公告)号：US09879938B1

公开(公告)日：2018-01-30

申请号：US15589381

申请日：2017-05-08

Applicant: Rex E. Isenhower ,  James J. Kempf

Inventor： Rex E. Isenhower ,  James J. Kempf

IPC: F41B5/12

CPC classification number: F41B5/123

Abstract: A reverse style crossbow having four pulleys preferably includes a barrel, a riser, a first limb, a second limb, a first cam and a second cam. The riser is attached to the barrel. The first and second limbs extend from opposing ends of the riser. The first and second cams are rotatably retained on distal ends of the first and second limbs. First and second barrel pulleys are rotatably retained on opposing sides of the barrel. A first limb pulley is rotatably retained by the first limb and a second limb pulley is rotatably retained by the second limb. One end of a first cable is attached to the first cam and the other end is attached to the barrel. One end of a second cable is attached to the second cam and the other end is attached to the barrel. A single cable may also be used.

公开(公告)号：US09759510B1

公开(公告)日：2017-09-12

申请号：US15064979

申请日：2016-03-09

Applicant: James J. Kempf ,  Dorge O. Huang

Inventor： James J. Kempf ,  Dorge O. Huang

IPC: F16B35/06 ,  F41B5/14 ,  F16B37/14

CPC classification number: F41B5/1426 ,  F16B5/0241 ,  F16B37/145

Abstract: A vibration dampening limb bolt preferably includes a hollow bolt and a vibration-dampening member. The hollow bolt includes a countersunk head and a bore. At least a portion of the bore is threaded to form a threaded bore. It is preferably that a tool cavity in the countersunk head has a multiple tooth cavity configuration, which would be shaped to receive a TORX bit. The vibration-dampening member includes a vibration block and a threaded shaft. The threaded shaft extends outward from a bottom of the vibration block. The threaded shaft is threadably engagable with the threaded bore. The vibration dampening material is obtained from a vibration stabilizer manufacturer. A second embodiment of the vibration dampening limb bolt includes the hollow bolt with an unthreaded bore and a vibration-dampening member with a rod projection having at least one o-ring.

公开(公告)号：US09551544B1

公开(公告)日：2017-01-24

申请号：US14974262

申请日：2015-12-18

Applicant: James J. Kempf

Inventor： James J. Kempf

IPC: F41B5/12 ,  F41A17/46 ,  F41B5/14

CPC classification number: F41A17/46 ,  F41B5/12 ,  F41B5/1403

Abstract: An improved crossbow lock mechanism includes the trigger housing, the seer lever, the seer lock lever, the latch, the trigger and an auto safety. The auto safety preferably includes a safety block, a safety lever arm and a safety lever arm lock. The safety lever arm lock is pivotally retained on one end of the safety lever arm with a safety arm lock pin. A finger engagement portion extends from one end of the safety lever arm lock and a stop portion extends from an opposing end thereof. A hand grip extends from the housing. The safety lever arm is pivotally retained in the hand grip with a safety lever arm pivot pin. A safety block actuator pocket is formed in a bottom of the safety block to receive the other end of the safety lever arm. A safety block spring biases the safety block away from the trigger lever.

Abstract translation: 改进的十字弓锁定机构包括触发器壳体，先导杆，塞子锁定杆，闩锁，触发器和自动安全装置。 自动安全优选地包括安全块，安全杆臂和安全杠杆臂锁。 安全杠杆臂锁定件通过安全臂锁定销枢转地保持在安全杆臂的一端。 手指接合部分从安全杆臂锁的一端延伸，并且止动部分从其相对的一端延伸。 手柄从壳体延伸。 安全杠杆臂用安全杆臂枢轴销枢转地保持在手柄中。 在安全块的底部形成安全块致动器袋，以容纳安全杆臂的另一端。 安全块弹簧将安全块偏离触发杆。

公开(公告)号：US09372045B1

公开(公告)日：2016-06-21

申请号：US14881454

申请日：2015-10-13

Applicant: James J. Kempf

Inventor： James J. Kempf

IPC: F41B5/06

CPC classification number: F41B5/06 ,  F41B5/066 ,  Y10S224/916

Abstract: An adjustable multi-level archery quiver preferably includes a quiver hood, a quiver frame, a first arrow gripper and a second arrow gripper. The quiver hood includes a plurality of broad head cavities and at least three frame mounting cavities. A centerline of the plurality of broad head cavities are aligned in a straight line. However, depths of adjacent broad head cavities are staggered from each other. An alternative embodiment of a quiver hood includes adjacent broad head cavities that are offset from each other in a Y-axis. The quiver frame includes a first hood mounting leg and a second hood mounting leg extending from one end. The first and second hood mounting legs are retained in the frame mounting openings. The first and second arrow grippers may be attached to the quiver frame to create right or left hand quivers.

Abstract translation: 优选地，可调式多级射箭颤动器包括颤抖罩，颤音框架，第一箭头夹持器和第二箭头夹持器。 颤抖罩包括多个宽的头腔和至少三个框架安装腔。 多个宽头腔的中心线以直线对准。 然而，相邻的宽头腔的深度彼此交错。 颤音罩的替代实施例包括在Y轴上彼此偏移的相邻的宽头腔。 颤音框架包括从一端延伸的第一罩安装腿和第二罩安装腿。 第一和第二罩安装腿保持在框架安装开口中。 第一和第二箭头夹持器可以附接到颤抖框架以创建右手或左手摇摆。

公开(公告)号：US09234719B1

公开(公告)日：2016-01-12

申请号：US14495919

申请日：2014-09-25

Applicant: James J. Kempf

Inventor： James J. Kempf

IPC: F41B5/12 ,  F41B5/10

CPC classification number: F41B5/123 ,  F41B5/105 ,  F41B5/12

Abstract: A shooting bow includes pulleys, a string latch housing, bow riser, barrel, first limb, second limb, a first cam, and a second cam. The bow riser is enjoined with the barrel. The first and second limbs extend from the bow riser. The first and second cams are pivotally retained on the first and second limbs. A bowstring is retained by the first and second cams. A first pulley and a second pulley are retained on the barrel. Both cams have a string track and a cable track. One end of the string is coupled to the first cam and the other end is coupled to the second cam. As for both cables, one end is coupled to the first cam, the middle of the cable travels around a pulley or track, and the other end is coupled to the first limb, first cam axle or back to the cam.

Abstract translation: 射击弓包括滑轮，弦乐器闩锁壳体，弓形提升器，枪管，第一肢体，第二肢体，第一凸轮和第二凸轮。 弓提升管被枪管。 第一和第二肢从弓形提升器延伸。 第一和第二凸轮被枢转地保持在第一和第二分支上。 弓弦由第一和第二凸轮保持。 第一滑轮和第二滑轮保持在筒体上。 两个凸轮都有一个弦轨和一条电缆轨道。 弦的一端连接到第一凸轮，另一端连接到第二凸轮。 对于两个电缆，一端联接到第一凸轮，电缆的中部绕着滑轮或轨道行进，另一端连接到第一分支，第一凸轮轴或者回到凸轮。