公开(公告)号：US10215522B1

公开(公告)日：2019-02-26

申请号：US15818794

申请日：2017-11-21

Applicant: James J. Kempf ,  Rex E. Isenhower

Inventor： James J. Kempf ,  Rex E. Isenhower

IPC: F41B5/12 ,  F41B5/14

Abstract: An adjustable trigger mechanism assembly for a crossbow includes a trigger housing, a sear lever, a latch, trigger lever, and a linkage arm. The sear lever is pivotally engaged with the trigger housing and controls the movement of the latch. One end of the linkage arm is pivotally engaged with the sear lever. The trigger lever is pivotally engaged with the trigger housing. The trigger lever includes at least two moment arm holes for pivotally engaging an opposing end of the linkage arm. In an alternative embodiment, the at least two moment arm holes are formed in the sear lever. The at least two moment arms cause the trigger lever to have at least two different pull distances and pull forces.

公开(公告)号：US10139189B1

公开(公告)日：2018-11-27

申请号：US15678150

申请日：2017-08-16

Applicant: Rex E. Isenhower ,  James J. Kempf

Inventor： Rex E. Isenhower ,  James J. Kempf

IPC: F41B5/12 ,  F41B5/10

Abstract: A multi-draw weight archery bow with cable timing includes a shooting bow and a timing-draw device. The shooting bow includes a riser, a barrel, a first limb, a second limb, a first cam, a second cam, a bowstring, a first cable and a second cable. A rotational timing-draw device includes a rotational timing housing and a rotational timing hub. The rotational timing housing is mounted in a limb. A cable is secured to the rotational timing hub and the rotational timing hub is secured to the rotational timing housing. A multi-position draw weight and rotation device includes a multi-position and rotational draw timing hub and the rotational timing housing. The end of a cable is secured to one of four positions on the multi-position and rotation draw timing hub. A multi-position draw weight device includes a multi-position adjustable draw weight plate and a timing housing.

公开(公告)号：US10126089B1

公开(公告)日：2018-11-13

申请号：US15865313

申请日：2018-01-09

Applicant: James J. Kempf ,  Rex E. Isenhower

Inventor： James J. Kempf ,  Rex E. Isenhower

IPC: F41B5/12 ,  F41B5/10

Abstract: An extreme reverse style crossbow, a reverse style crossbow or a reverse style crossbow with a single stirrup includes two cams, one string, two pulleys and two cables. The pulleys are rotatably retained on the limbs, adjacent the two cams. A dual stirrup crossbow includes two cams, one string, two pulleys and one cable. The two pulleys are rotatably retained on two cam axles. A second dual stirrup crossbow includes two cams, one string, two pulleys and two cables. The two pulleys are rotatably retained on two cam axles. A non-conventional crossbow includes two cams, one string, two pulleys and one cable. The two cams are rotatably retained on limbs between the proximal and distal ends thereof. The two pulleys are rotatably retained on two cam axles. A vertical bow includes two cams, one string, two pulleys and one cable. The two pulleys are rotatably retained on two cam axles.

公开(公告)号：US10018442B1

公开(公告)日：2018-07-10

申请号：US15463503

申请日：2017-03-20

Applicant: James J. Kempf ,  Rex E. Isenhower

Inventor： James J. Kempf ,  Rex E. Isenhower

IPC: F41B5/12 ,  F41B5/10

CPC classification number: F41B5/123 ,  F41B5/10 ,  F41B5/105

Abstract: An extreme reverse style crossbow, a reverse style crossbow or a reverse style crossbow with a single stirrup includes two cams, one string, two pulleys and two cables. The pulleys are rotatably retained on the limbs, adjacent the two cams. A dual stirrup crossbow includes two cams, one string, two pulleys and one cable. The two pulleys are rotatably retained on two cam axles. A second dual stirrup crossbow includes two cams, one string, two pulleys and two cables. The two pulleys are rotatably retained on two cam axles. A non-conventional crossbow includes two cams, one string, two pulleys and one cable. The two cams are rotatably retained on limbs between the proximal and distal ends thereof. The two pulleys are rotatably retained on two cam axles. A vertical bow includes two cams, one string, two pulleys and one cable. The two pulleys are rotatably retained on two cam axles.

公开(公告)号：US09945634B1

公开(公告)日：2018-04-17

申请号：US15341016

申请日：2016-11-15

Applicant: Rex E. Isenhower ,  James J. Kempf

Inventor： Rex E. Isenhower ,  James J. Kempf

IPC: F41B5/10 ,  F41B5/12

CPC classification number: F41B5/123 ,  F41B5/10

Abstract: A multi-draw weight archery bow with cable timing includes a shooting bow and a timing-draw device. The shooting bow includes a riser, a barrel, a first limb, a second limb, a first cam, a second cam, a bowstring, a first cable and a second cable. A rotational timing-draw device includes a rotational timing housing and a rotational timing hub. The rotational timing housing is mounted in a limb. A cable is secured to the rotational timing hub and the rotational timing hub is secured to the rotational timing housing. A multi-position draw weight and rotation device includes a multi-position and rotational draw timing hub and the rotational timing housing. The end of a cable is secured to one of four positions on the multi-position and rotation draw timing hub. A multi-position draw weight device includes a multi-position adjustable draw weight plate and a timing housing.

公开(公告)号：US09243861B1

公开(公告)日：2016-01-26

申请号：US14829735

申请日：2015-08-19

Applicant: James J. Kempf ,  Rex E. Isenhower

Inventor： James J. Kempf ,  Rex E. Isenhower

IPC: F41B5/12 ,  F41B5/10

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

Abstract: A shooting bow includes pulleys, a string latch, 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，弓形提升器，枪管，第一肢，第二肢，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。

公开(公告)号：US08899218B2

公开(公告)日：2014-12-02

申请号：US13622744

申请日：2012-09-19

Applicant: James J. Kempf

Inventor： James J. Kempf

IPC: F41B5/18

CPC classification number: F41B5/1469 ,  F41B5/12

Abstract: A trigger assembly for a crossbow or other weapon system. The trigger assembly includes a trigger arm coupled between a trigger and a sear. The trigger arm is not parallel to the line of fire, thereby allowing for increased mechanical advantage and a smoother, safer trigger pull. The trigger assembly incorporates various safety measures, including a dry fire mechanism which prevents the unintentional damaging and potentially dangerous release of the bowstring before an arrow is positioned on the rail of the crossbow. The trigger assembly allows for various adjustments to vary the trigger length and pull, while maintaining smoothness and preventing the unintentional or inadvertent release of the bowstring.

公开(公告)号：US08104461B2

公开(公告)日：2012-01-31

申请号：US11656845

申请日：2007-01-23

Applicant: James J. Kempf

Inventor： James J. Kempf

IPC: F41B5/12

CPC classification number: F41B5/12

Abstract: A crossbow with an improved cocking assembly. The improvement includes a means for automatically disengaging a hook associated with a cocking assembly from a bowstring once the bowstring has been drawn the desired distance behind a bowstring retainer. The automatic disengagement of the hook from the bowstring reduces movement and sound associated with disengagement, and reduces the likelihood of injury associated with placement of the fingers in front of the cocked bowstring. The disengagement mechanism may either be mechanical or magnetic as desired.

Abstract translation: 具有改进的起动组件的弩。 该改进包括一旦弓弦已被拉伸到弓弦保持器后面所需距离的位置，则自动地将与起弧组件相关联的钩子与弓弦杆分离的装置。 钩子与弓弦杆的自动分离减少与脱离相关联的运动和声音，并且减少与在翘起的弓弦前面放置手指相关的受伤的可能性。 分离机构可以根据需要是机械的或磁性的。

公开(公告)号：US07836871B2

公开(公告)日：2010-11-23

申请号：US11654418

申请日：2007-01-17

Applicant: James J. Kempf

Inventor： James J. Kempf

IPC: F41B5/12

CPC classification number: F41B5/1469 ,  F41B5/123

Abstract: A crossbow having an increased powerstroke and reduced noise. The powerstroke is increased by inverting the limb orientation from the standard crossbow arrangement and locating string guides at least partially forward and rearward of the ends of the limbs. The bowstring is drawn from the tops of the string guides to maximize the powerstroke, reducing noise and increasing the retained and delivered energy over existing crossbows.

Abstract translation: 弩具有增加的动力中和噪音降低。 通过从标准弩装置反转肢体方向并将肢体引导件至少部分地位于肢体端部的前方和后方来增加动力行程。 琴弦从琴弦导轨的顶部拉出，以最大化动力行程，减少噪音，并增加在现有弩上的保留和传递能量。

公开(公告)号：US06921424B2

公开(公告)日：2005-07-26

申请号：US10213899

申请日：2002-08-06

Applicant: Neville J. Bugli ,  James J. Kempf ,  William C. Montgomery ,  Charles B. Peterson

Inventor： Neville J. Bugli ,  James J. Kempf ,  William C. Montgomery ,  Charles B. Peterson

IPC: B01D45/16 ,  B04C3/06 ,  B01D45/12

CPC classification number: B04C3/06 ,  B01D45/16 ,  B04C2003/006 ,  B04C2005/133

Abstract: A pre-separator removes contaminants from dirty air and an air intake system of an automobile engine. The pre-separator includes a central body connected to a plurality of vanes, the central body including a leading nose-cone portion and a trailing nose-cone portion. An exit tube defines an outlet that is sized and positioned relative to the central body. The pre-separator is capable of easy packaging within the air intake system, while minimizing the restriction and maximizing horsepower of the engine. In one embodiment, the separation efficiency, the restriction, and acoustic tuning may be selectively controlled for the particular application.

Abstract translation: 预分离器从脏空气和汽车发动机的进气系统中去除污染物。 预分离器包括连接到多个叶片的中心体，中心体包括前鼻锥部分和后鼻锥部分。 出口管限定了相对于中心体的尺寸和位置的出口。 预分离器能够在进气系统内容易地包装，同时最小化发动机的限制和最大化马力。 在一个实施例中，可以针对特定应用选择性地控制分离效率，限制和声调谐。