# US 5,349,937 A · Torque free bow with improved handle grip assembly

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- Number: US 5,349,937 A
- Document ID: US5349937A
- Status: Granted
- Kind: A
- Application number: 08/001,446
- Filed: 1993-01-07
- Granted: 1994-09-27
- Earliest claimed: 1991-11-15
- Inventors: Michael R. Burling
- Web page: https://patentgrep.com/patent/US5349937A

## CPC

- F41B 5/1438: {Buttons}
- F41B 5/10: Compound bows {(compound crossbows F41B5/123)}
- F41B 5/143: {Arrow rests or guides}
- 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)

## Abstract

An archery bow with an offset handle is disclosed. The handle is hingedly connected to the riser of the bow so that the handle is free to pivot relative to the riser and vice versa. This connection prevents torque from being transmitted from the handle to the riser and offers improved accuracy. The connection between the riser and the handle allows rotation about an axis which coincides with the center plane of the bow. There is a substantial offset between the handle and the center plane of the bow. The offset provides substantial arm clearance and permits construction of the bow to accommodate remarkably short brace heights. Preferably, an arm brace is attached to the handle. An improved bow having such offset handle as well as reduced brace height and increased power stroke and increased standard rated velocity is also disclosed. A riser modification is taught wherein the limb angle is maintained to achieve the increases in power stroke and standard rated velocity.

## Claims

### Claim 1

A compound archery bow having a center plane, said bow comprising
a riser and limb assembly wherein said limbs are supported on said riser at a given limb angle for action about limb pivots,
cams secured to said limbs,
a bowstring
a grip assembly, said grip assembly comprising
a handle having a center plane and a low point, said handle being secured to and supported on said riser so that forces applied to said handle act on said riser through at least one point which is substantially coincident with the center plane of said bow, and string stop means for limiting over travel of said bow string after release of an arrow,
wherein said riser is constructed so that the bow has a brace height, when strung with said bow string, which is at least one inch less than seven inches and wherein the distance between said bowstring and said at least one point is substantially equal to the brace height and wherein said riser is constructed so that the limb pivots are at least one inch forward, relative to the handle low point and said at least one point, of the corresponding position that said limb pivots would have in a conventional bow with a brace height of approximately seven inches,
wherein the bow has a standard rated velocity which is at least six feet per second faster than a conventional bow comprising
a conventional riser,
said cams and
said limbs and
having a brace height of substantially seven inches and having a limb angle corresponding with the given limb angle, when strung with said bowstring.

### Claim 2 (depends on 1)

The bow claimed in claim 1 wherein said low point of said handle is offset a substantial distance from the center plane of the bow, and said handle is pivotally connected to said riser for pivotal movement about at least one point which is coincident with the center plane of said bow.

### Claim 3 (depends on 2)

The archery bow claimed in claim 2 which further comprises an arm brace secured to said handle and pivotable therewith.

### Claim 4 (depends on 1)

The archery bow claimed in claim 1 wherein said string stop is operable, when said bow string is at rest, to preload said bow string.

### Claim 5

A compound archery bow having a center plane, said bow comprising
a riser and limb assembly wherein said limbs are supported on said riser at a given limb angle for action about limb pivots,
cams secured to said limbs,
a bowstring
a grip assembly, said grip assembly comprising
riser hinge means,
a handle having a center plane and a low point,
handle hinge means for pivotally supporting said riser relative to said handle so that forces applied to said handle act on said riser through at least one point which is coincident with the center plane of said bow,
said riser hinge means and .said handle hinge means being connected for pivotal movement about an axis coincident with the bow center plane and said at least one point through which forces applied to said handle act on said riser, wherein said handle low point is offset a substantial distance from the center plane of said bow,
wherein said riser is constructed so that the bow has a brace height, when strung with said bow string, which is at least one inch less than seven inches and wherein the distance between said bowstring and said at least one point is substantially equal to the brace height and wherein said riser is constructed so that the limb pivots are at least one inch forward, relative to the handle low point and said at least one point, of the corresponding position that said limb pivots would have in a conventional bow with a brace height of approximately seven inches,
wherein the bow has a standard rated velocity which is at least six feet per second faster than a conventional bow comprising
a conventional riser,
said cams and
said limbs and
having a brace height of substantially seven inches and having a limb angle corresponding with the given limb angle, when strung with said bowstring.

### Claim 6 (depends on 5)

The bow claimed in claim 5 which further comprises string stop means for limiting over travel of said bow string after release of an arrow.

### Claim 7 (depends on 6)

The archery bow claimed in claim 6 wherein said string stop is operable, when said bow string is at rest, to preload said bow string.

### Claim 8 (depends on 5)

The archery bow claimed in claim 5 which further comprises an arm brace secured to said handle and pivotable therewith.