# US 9,752,842 B1 · Archery bow with a cam timing belt

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- Number: US 9,752,842 B1
- Document ID: US9752842B1
- Status: Granted
- Kind: B1
- Application number: 15/428,215
- Filed: 2017-02-09
- Granted: 2017-09-05
- Earliest claimed: 2017-02-09
- Applicants: Dorge O. Huang
- Inventors: Dorge O. Huang
- Web page: https://patentgrep.com/patent/US9752842B1

## CPC

- F41B 5/105: {Cams or pulleys for compound bows}
- F41B 5/1403: {Details of bows; (camera's on bows F41B5/1492)}
- 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 a cam timing belt preferably includes a first cam pulley, a first cam cable, a first timing pulley, a second cam pulley, a second cam cable, a second timing pulley and a timing belt. An archery bow includes a riser, a first limb, a second limb, a first cam and a second cam. The riser preferably includes a first timing projection and a second timing projection. The first cam pulley and the first timing pulley are rotatably retained on the first timing projection. The first cable is preferably secured to a first cam axle and the first cam. The second cam pulley and the second timing pulley are rotatably retained on the second timing projection. The second cable is preferably secured to a second cam axle and the second cam. The timing belt is secured to the first and second timing pulleys.

## Claims

### Claim 1

A cam timing system for an archery bow, the archery bow includes a riser, a first limb extending from a first end of the riser, a second limb extending from a second end of the riser, a first cam rotatably retained on the first limb, a second cam rotatably retained on the second limb, comprising:
a first cam pulley is capable of being rotated relative to the riser;
a first cam cable is capable of having one end attached to the first cam, an opposing end of said first cam cable is attached to one of the first cam and a first cam axle, said first cam cable contacts said first cam pulley;
a first timing pulley includes a drive connection with said first cam pulley;
a second cam pulley is capable of being rotated relative to the riser;
a second cam cable is capable of having one end attached to the second cam, an opposing end of said second cam cable is attached to one of the second cam and a second cam axle, said second cam cable contacts said second cam pulley;
a second timing pulley includes a drive connection with said second cam pulley; and
a timing belt is retained on said first and second timing pulleys, said timing belt is twisted to ensure that said first and second timing pulleys rotate in opposite directions.

### Claim 2 (depends on 1)

The cam timing system for an archery bow of claim 1 wherein:
the riser includes a first timing projection and a second timing projection, the first timing projection extends from the riser near the first limb, the second timing projection extends from the riser near the second limb, said first cam pulley is capable of being rotatably retained on an end of the first timing projection, said second cam pulley is capable of being rotatably retained on an end of the second timing projection.

### Claim 3 (depends on 1)

The cam timing system for an archery bow of claim 1, further comprising:
a bowstring having a first end retained on the first cam and a second end retained on the second cam.

### Claim 4 (depends on 1)

The cam timing system for an archery bow of claim 1 wherein:
said timing belt is horizontally offset from said riser to provide clearance for an arm or hand of an archer.

### Claim 5

An archery bow having a cam timing belt comprising:
an archery bow includes a riser, a first limb, a second limb, a first cam, a second cam, said first limb extends from a first end of said riser, said second limb extends from a second end of said riser, said first cam is rotatably retained on said first limb, said second cam is rotatably retained on said second limb;
a first cam pulley is rotatably retained relative to said riser;
a first cam cable having one end attached to said first cam, an opposing end of said first cam cable is attached to one of said first cam and a first cam axle, said first cam cable contacts said first cam pulley;
a first timing pulley includes a first drive connection with said first cam pulley;
a second cam pulley is rotatably retained relative to said riser;
a second cam cable having one end attached to the second cam, an opposing end of said second cam cable is attached to one of the second cam and a second cam axle, said second cam cable contacts said second cam pulley;
a second timing pulley includes a second drive connection with said second cam pulley; and
said timing belt is retained on said first and second timing pulleys.

### Claim 6 (depends on 5)

The cam timing system for an archery bow of claim 5 wherein:
said riser includes a first timing projection and a second timing projection, said first timing projection extends from said riser near said first limb, said second timing projection extends from said riser near said second limb, said first cam pulley is rotatably retained on an end of said first timing projection, said second cam pulley is rotatably retained on an end of said second timing projection.

### Claim 7 (depends on 5)

The cam timing system for an archery bow of claim 5, further comprising:
a bowstring having a first end retained on the first cam and a second end retained on the second cam.

### Claim 8 (depends on 7)

The cam timing system for an archery bow of claim 7 wherein:
said timing belt is horizontally offset from said riser to provide clearance for an arm or hand of an archer.