# US 8,770,178 B2 · Shooting bow

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- Number: US 8,770,178 B2
- Document ID: US8770178B2
- Status: Granted
- Kind: B2
- Application number: 13/066,146
- Filed: 2011-04-07
- Published: 2011-10-20
- Granted: 2014-07-08
- Earliest claimed: 2009-01-14
- Applicants: James J. Kempf
- Inventors: James J. Kempf
- Web page: https://patentgrep.com/patent/US8770178B2

## CPC

- F41B 5/1469: {Bow-string drawing or releasing devices (F41B5/1473 takes precedence)}
- F41A 19/10: Triggers; Trigger mountings
- F41B 5/12: Crossbows
- F41B 5/123: {Compound crossbows}
- F41B: WEAPONS FOR PROJECTING MISSILES WITHOUT USE OF EXPLOSIVE OR COMBUSTIBLE PROPELLANT CHARGE; WEAPONS NOT OTHERWISE PROVIDED FOR (projectiles for fishing, e.g. fish-spears, A01K81/00; sports implements for throwing A63B65/00, e.g. boomerangs A63B65/08; stationary apparatus for projecting sports balls, e.g. tennis balls, A63B69/40; throwing or slinging toys A63H33/18; knives, axes B26B; projectiles or missiles other than those incorporating springs as projecting means F42B6/00)
- F41A: FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE

## 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.

## Claims

### Claim 1

A shooting bow comprising:
(a) a frame;
(b) a bow coupled to said frame;
(c) a string coupled to said bow;
(d) a string retainer coupled to said string;
(e) a sear engager coupled to said string retainer;
(f) a sear coupled to said sear engager;
(g) a trigger arm pivotably coupled to said sear;
(h) a trigger bar coupled to said frame; and
(i) wherein the uppermost point at which said trigger arm is coupled to said trigger bar is below the lowermost point at which said trigger arm is coupled to said sear.

### Claim 2 (depends on 1)

The shooting bow of claim 1, further comprising a dry fire pin coupled to said string retainer.

### Claim 3 (depends on 2)

The shooting bow of claim 2, further comprising an arrow coupled to said string.

### Claim 4 (depends on 3)

The shooting bow of claim 3, wherein said arrow is in contact with said dry fire pin.

### Claim 5

A shooting bow comprising:
(a) a frame;
(b) a bow coupled to said frame;
(c) a string coupled to said bow;
(d) a string retainer coupled to said string;
(e) a sear engager coupled to said string retainer;
(f) a sear coupled to said sear engager;
(g) a trigger arm pivotably coupled to said sear;
(h) a trigger bar coupled to said frame;
(i) wherein the rearwardmost portion of said trigger bar is located forward of the forwardmost portion of said sear.

### Claim 6

A shooting bow comprising:
(a) a frame;
(b) a bow coupled to said frame;
(c) a string coupled to said bow;
(d) a string retainer coupled to said string;
(e) a sear engager coupled to said string retainer;
(f) a sear coupled to said sear engager;
(g) a trigger arm pivotably coupled to said sear;
(h) a trigger bar coupled to said frame; and
(i) wherein said trigger arm is pivotably coupled to said trigger bar.