# Patent

## Title
Range finder for weapons

## Abstract

A range finder includes housing, circuitry, a lens, a display, and a plurality of threaded apertures. The housing has a front end, a rear end, and a bottom portion extending between the front end and the rear end. The range finder circuitry is located within the housing. The lens is located at the front end of the housing. The display is located at the rear end of the housing. The plurality of threaded apertures are located in the bottom portion of the housing.

## Background
CROSS-REFERENCE TO RELATED APPLICATION(S)
This application is a continuation-in-part of U.S. patent application Ser. No. 11/327,123, filed Jan. 6, 2006 and titled “DEVICE MOUNT FOR A FIREARM” now U.S. Pat. No. 7,574,824. This application is also a continuation-in-part of application Ser. No. 11/106,828, filed Apr. 15, 2005 and titled “RANGE FINDER” now U.S. Pat. No. 7,643,132, which is a continuation-in-part of application Ser. No. 11/018,960, filed Dec. 21, 2004 and titled “RANGE FINDER”, now U.S. Pat. No. 7,100,321. Further, application Ser. No. 11/018,960 is a continuation of application Ser. No. 10/641,169, filed Aug. 14, 2003 and titled “RANGE FINDER”, now U.S. Pat. No. 6,988,331, which is a continuation of application Ser. No. 10/090,333, filed Mar. 4, 2002 and titled “RANGE FINDER”, now U.S. Pat. No. 6,615,531.


BACKGROUND
Range finders can be a useful tool when hunting for game. A ranger finder conveys the distance to an object (game target). This information is helpful to a hunter because it allows a hunter to determine if the target is beyond the range of a firearm or bow. Knowing the distance to a target also aids the hunter in the placement of the sight of the firearm or bow. For example, if the target is a great distance from a firearm, a hunter can raise the sight of the firearm over the target a select distance to compensate for the trajectory of a projectile (bullet) fired from the firearm. The distance found by the range finder can aid the hunter in determining how much the sight should be raised over the target.
SUMMARY
An embodiment of the present invention is an optical range finder which includes housing, circuitry, a lens, a display, and a plurality of threaded apertures. The housing has a front end, a rear end, and a bottom portion extending between the front end and the rear end. The range finder circuitry is located within the housing. The lens is located at the front end of the housing. The display is located at the rear end of the housing. The plurality of threaded apertures are located in the bottom portion of the housing.
In another embodiment, the range finder includes housing, a signal lens, a liquid crystal display, a range finder circuit, and at least one threaded aperture. The housing includes a front end, a back end, a top, a bottom, a left side and a right side. The signal lens for projects and receives range finding signals. The signal lens is mounted at the front end of the housing. The liquid crystal display displays the distance measured by the range finding signals. The liquid crystal display is mounted at the back end of the housing. The range finder circuit is located within the housing between the signal lens and the display. At least one threaded attaching aperture extends upwards into the rangefinder from the bottom to attach the range finder to a weapon mount.



BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1A is a side view of a mounting system of one embodiment of the present invention.
FIG. 1B is a side view of a mounting system of another embodiment of the present invention.
FIG. 2A is a side view of a mount of one embodiment of the present invention.
FIG. 2B is a back view of the mount of FIG. 2A illustrating a mounting rail of one embodiment of the present invention.
FIG. 2C is a top view of the mount of FIG. 2A.
FIG. 3A is a side view of a scope mount with a locking rod mechanism.
FIG. 3B is a side view of a scope mount engaging a mount of one embodiment of the present invention.
FIG. 3C is a side view of a scope mount with a thumb screw locking mechanism.
FIG. 4 is a front view of a mount of FIG. 2A attaching a camera to a scope.
FIG. 5 is a side view of a mount of FIG. 2A attaching a camera to a rifle.
FIG. 6 is a side perspective view of a rangefinder of one embodiment of the present invention.
FIG. 7A is a side view of a mounting rail of one embodiment of the present invention.
FIG. 7B is a top view of the mounting rail of FIG. 7A.
FIG. 8 is a side view of a rangefinder being attached to a scope of one embodiment of the present invention.
FIG. 9 is a front view of the rangefinder of FIG. 6 attached to a tripod.
FIG. 10 is a flow diagram of one embodiment of the present invention.
FIG. 11 is another flow diagram of another embodiment of the present invention.
FIG. 12 is a front view of a mount of one embodiment of the present invention mounted to a barrel of a firearm.
FIG. 13 is a perspective view of a rangefinder of another embodiment of the present invention mounted to a firearm.
FIG. 14 is a cross-sectional view of the rangefinder of FIG. 13.
FIG. 15 is a rear view of the rangefinder coupled to a firearm of FIG. 13.
FIG. 16 is a perspective view the rangefinder coupled to a firearm of FIG. 13.



In accordance with common practice, the various described features are not drawn to scale but are drawn to emphasize specific features relevant to the present invention. Reference characters denote like elements throughout Figures and text.
DETAILED DESCRIPTION
In the following detailed description, reference is made to the accompanying drawings, which form a part hereof, and in which is shown by way of illustration specific embodiments in which the inventions may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention, and it is to be understood that other embodiments may be utilized and that logical, mechanical and electrical changes may be made without departing from the spirit and scope of the present invention. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the present invention is defined only by the claims and equivalents thereof.
Embodiments of the present invention provide a mount that allows for the attachment of a device such as a video camera, rangefinder or the like, to a weapon. In particular, in one embodiment, the mount allows the device to be mounted to a scope of a weapon in a manner that does not hamper the operation of the scope (i.e. the elevation and/or windage adjustment knob for example) or other operations of the weapon. In another embodiment, a mounting rail adapted to mount a device to a firearm. In yet another embodiment, a rangefinder having a remote port and attaching treads that can be attached to the mount is provided.
Referring to FIG. 1A, a mounting system 100 of one embodiment of the present invention is illustrated. The mounting system 100 in this embodiment includes a scope 110 that is mounted on a weapon, which is a rifle 108 in this example, and a scope mount 102. The electronic device is a rangefinder 104 in this example that can be operated remotely with a remote control pad 106. In the example of FIG. 1A, the rangefinder 104 is mounted over the scope 110 from a perspective of the hunter. Referring to FIG. 1B, an example of another embodiment in which the rangefinder 104 is mounted on the side of the scope 110 from the perspective of the hunter.
FIG. 2A is a side view of a mount 200 of one embodiment of the present invention. The mount is used in embodiments of the present invention to mount a device to the weapon. The mount 200 includes a side plate 205 and a support plate 207 that generally makes the shape of an L. In particular, the support plate 207 extends from a first end of the side plate 205 at generally a right angle. The support plate 207 includes an engaging surface 206 to support a device and a stabilizing nub 204 designed to fit into a cavity of a device to provide stability and prevent the rotation of the device when mounted to the mount 200. The support plate 207 also includes a mounting aperture 208. The mounting aperture 208 is designed to allow a thumb screw (or any type of attaching device) to engage the device so that the device can be selectively coupled to the engaging surface 206 of the mount 200. The side plate 205 includes a mounting rail (or rail mount) 202 that is located near a second end of the side plate 205 that is opposite the first end of the side plate 205. As illustrated, the mounting rail 202 extends from the side plate 205 in a direction that is opposite the direction the support plate 207 extends from the side plate 205. FIG. 2B illustrates a back view of the mount 200 and in particular the mounting rail 202. FIG. 2C illustrates a top view of the mount 200 and in particular the stabilizing pin 204 and the mounting aperture 208.
FIG. 3A illustrates a side view of a scope 110 with a quick mount scope mount 300 attached thereto. Also illustrated is the adjustment knob 304 of the scope 300 which adjusts the elevation and/or windage of the scope. It is important that the mount 200 and the device using the mount not interfere with the operations of the scope such as the operation of the adjustment knob 304. FIG. 3B illustrates a mount 200 coupled to the scope 110 via the scope mount 300. In particular, the scope mount 300 engages the mounting rail 202 of mount 200. In this embodiment, the scope mount 300 locks the mount onto the scope via a locking mechanism having a locking rod 305 that is rotated into a locking position. In the embodiment of FIG. 3C, a scope mount 310 of one embodiment of the present invention is illustrated. The scope mount 310 includes a threaded thumb screw 312 with a triangle shaped head. The triangle shaped head allows for the applying of a twisting pressure to selectively lock and unlock the scope mount 312 to the scope 110 without the use of a screwdriver.
Referring to FIG. 4, a front view of the mount 200 attaching a video camera 400 to a scope 110 of one embodiment of the present invention is illustrated. As illustrated, a bottom side of camera 400 is positioned to abut the engaging surface 206 of the mount 200. The thumb screw mounting aperture 208 allows a triangular shaped head thumb screw 306 to be threaded into internal threads 404 of the camera 400 to secure the camera to the mount 200. Moreover, a hand strap 402 of the camera 400 can be wrapped around the mount as illustrated to further secure the camera to the mount 200. FIG. 4 further illustrates how the mounting rail 202 of the mount 200 is engaged with the scope mount 410. FIG. 5 illustrates the mounting system 500 on a rifle 108. As illustrated, the mount 20 allows for the camera to be mounted away from the elevation adjustment knob 309 of the scope 110. Moreover, as illustrated the eyepiece 503 of camera 400 is approximately at the same height as the eyepiece 505 of the scope 110 in relation to the hunter. That is, the eyepiece 503 of the camera 400 is basically at eye level with the aiming mechanism of the firearm. Accordingly, the hunter's movement to look between the scope and the view finder on the camera is minimal to avoid disruption of the hunt. This also applies to other devices such as a rangefinder with a display that is positioned relatively at eye level with the scope as illustrated in FIG. 1B. Also illustrated in FIG. 5 is a remote control pad 502 that is designed to control the camera 400.
An example of a rangefinder 600 of one embodiment of the present invention is illustrated in FIG. 6. Rangefinder 600 includes attaching threads 604 adapted to engage the threads of a thumb screw. Accordingly, the rangefinder can be attached to the mounting plate 200 similar to the camera 400 of FIG. 4. This embodiment is illustrated in FIG. 1B. The rangefinder 600 also includes display 610, a power button 605, a mode switch button 607, a battery cover 603 and a remote control port 602 that allows for the remote operation of the rangefinder 600. Moreover, the bottom surface of the rangefinder 600 further includes 606 attaching apertures 606. The attaching apertures 606 are used to mount a mounting rail to the rangefinder 600. The bottom surface of the rangefinder 600 further includes a stabilizing recess 608 that is designed to receive a stabilizing nub such as the stabilizing nub 204 on mount 200. In this embodiment, the battery cover 603 and the remote control port 602 are positioned on a left side of the rangefinder 600 so that when the rangefinder 600 is mounted to a mount 200 as illustrated in FIG. 1B, the battery compartment and the port 602 are assessable. In another embodiment, where the mount 200 is mounted to the other side of the scope 110, the battery cover 603 and the remote control port 602 are positioned on a right side of the rangefinder 600 to allow access to the battery chamber and the port 602 when mounted to the mount 200 in this embodiment. In addition, as illustrated in FIG. 1B, the placement of the power button 605 and mode switch button 607 on a rear side of the rangefinder 600 allows for the ease of operation of the rangefinder 600 while the firearm is shouldered in a shooting position.
An example of a mounting rail 700 of one embodiment of the present invention is illustrated in FIGS. 7A and 7B. The mounting rail 700 of this embodiment includes rail apertures 704 that are adapted to be aligned with the attaching apertures of the rangefinder 606 of other device. Screws or other attachment means are used to secure the rangefinder 606 to the mounting rail 700 through the rail apertures 704 and the associated attaching apertures 606. Further illustrated is a stabilizing recess 703. This stabilizing recess is also designed to receive a stabilizing nub such as the stabilizing nub 204 on mount 200. The rail apertures 704, stabilizing nub as well as a rail thumb screw aperture 702 are positioned between a first edge 075 and a second edge 707 of the mounting rail 700. Moreover as illustrated, a first rail 701 is positioned along the first edge 705 and a second rail 703 is positioned along a second edge 707 of the mounting rail 700.
An illustration of a rangefinder attached to a scope 110 using the mounting rail 700 and a scope mount 706 is illustrated in FIG. 8. As illustrated in this embodiment, the mounting rail 700 is directly coupled to the scope mount 706. In other embodiments, the mounting rail 700 is coupled to a mount 200 that is coupled to the scope mount 706. In these embodiments, the mount rail thumb screw aperture 702 is used to connect the mounting rail 700 and rangefinder 600 to the mount 200 via a thumb screw. The attaching threads 604 of the rangefinder 600 can also be used to mount the rangefinder 600 to a tripod 900 as illustrated in FIG. 9. As also illustrated in FIG. 9, the rangefinder 600 can be remotely operated by a remote control pad 902 that is in communication with the remote control port 602.
One method of using a rangefinder 600 and a mount rail (or mounting rail) 700 of one embodiment of the present invention is illustrated in FIG. 10. As illustrated, the method begins by attaching a mounting rail 700 to the rangefinder 600 (1102). In one embodiment, as illustrated in FIGS. 6 and 8 the attachment is at the bottom of the rangefinder. This illustration however, is shown by way of example and not by limitation. Accordingly, the location of the attachment of the mounting rail 700 is not limited to the bottom of the rangefinder. It is then determined if a mount 200 is already on the scope (1004). If a mount 200 is not on the scope (1004), the mounting rail 700 is directly attached to a scope mount 706 as illustrated in FIG. 8. If a mount 200 is already on the scope (1004), the rangefinder 600 is attached to the mount 200 as illustrated in FIG. 1B.
As discussed above, the mount 200 can be used by a plurality of devices. One method of using the mount with devices in one embodiment of the present invention is illustrated in FIG. 11. As illustrated, a rail mount 202 on the mount 200 is first attached to at least one scope mount 304 (1101). This is illustrated in FIG. 3B. The device is then attached to the mount (1104). In one embodiment, the visual operation of the device is positioned by the mount to be at eye level with an aiming mechanism of the firearm which is in this embodiment, an eye piece of the scope. For example, as discussed above, with a video camera device 400 (of FIG. 5), the eyepiece 503 of the camera 400 is positioned approximately at eye level with the eyepiece 505 of the scope 110 and with the rangefinder example the display on the range finder is positioned approximately at eye level with the eyepiece of the scope (FIG. 1B).
Although, the above examples of the embodiments of the present invention illustrate a device being coupled to a scope of a firearm, other embodiments attach the device directly to a barrel of a firearm. For example, please refer to FIG. 12. In the embodiment of FIG. 12, a mount 200 is coupled directly to a barrel 1200 of a firearm via scope mount 410. That is, in this embodiment, the scope mount 410 is directly coupled to the barrel 1200 and not a scope. Also illustrated in FIG. 12 is the aiming mechanism 1210 of the firearm which is, in this embodiment, approximately at eye level with the operating device of the video camera 400. Accordingly, the above embodiments of the present invention are not limited to being mounted to a scope.
Referring to FIG. 13, a rangefinder 1300 of another embodiment of the present invention is illustrated. As illustrated, the range finder 1300 includes a main housing 1302 and a power supply housing 1304. The main housing 1302 encases signal lens 1310A through which a radar signal is passed and received. Also illustrated in FIG. 13, is an operation panel 1306 that is used to operate the range finder 1300. The range finder 1300 can also be operated by a remote unit 1305. In particular, the remote unit 1305 is adapted to be attached to a firearm in such a manner that it allows easy manipulation of the range finder 1300. This feature is illustrated in FIG. 13. The range finder 1300 in this embodiment is adapted to be mounted to a scope 1309 that is in turn mounted to firearm 1311. Moreover, in this embodiment the range finder 1300 is mounted to the scope 1309 with mounting brackets 1308A and 1308B.
Referring to FIG. 14 a cross-sectional top view of the range finder 1300 is illustrated. As illustrated, the main housing 1302 includes a first section 1450 and a second section 1454. The first and second sections 1450 and 1454 are connected by a plurality of attaching screws. In other embodiments, other attaching means are used and this invention is not limited to the use of attaching screws. As illustrated, an inter attachment section 1452 abuts the first section 1450. The inter attachment section 1450 is adapted to hold a first and second signal lens 1310A and 1310B. Although, this embodiment uses two signal lenses 1310A and 1310B, it will be understood in the art that other signal focusing method and other projection methods could be used and that this invention is not limited to two signal lenses 1310A and 1310B. Also illustrated are signal generation circuit 1430, signal receiving circuit 1432, a process circuit 1434 and a control circuit 1435 that make up part of a range finding circuit. The signal generation circuit 1430 is adapted to generate a signal that is projected out of the signal end 1460 of the range finder 1300. The signal receiving circuit 1432 is adapted to receive signals reflected off of an object and reflected back through the signal end 1460 of the range finder 1300. The process circuit 1434 is adapted to process the received signals to determine the distance to the object the signal was reflected off of. The control circuit 1435 is adapted to control and synchronize the signal generation circuit 1430, the signal receiving circuit 1432 and the process circuit 1434 based on operating signals provided by a user. In one embodiment, a signal propagation time measuring method is used to determine the distance to an object. In other embodiments, a light-section method or a binocular sterosis method or other similar methods are used. Accordingly, the present invention is not limited to a specific type of method of determining distances to an object.
Further illustrated in FIG. 14, is the power supply housing 1404 in the second section 1454 of the range finder 1300. In this embodiment, the power supply 1414 is a battery that is received in a cavity of the power supply housing 1404. The power supply 1414 is retained in the power supply housing 1404 with a threaded cap 1412. In this embodiment, the display 1416 is coupled to the display end 1462 of the range finder 1300. The display 1416 is adapted to display indicia that represents the distance to an object when the range finder 1300 is activated. In one embodiment the display is an LCD. A display circuit 1418 is used to process signals from the processing circuit 1434 and to direct the display 1416 to display the distance. The control circuit 1425 is controlled by operating switches 1420, 1422 and 1424 on the operating panel 1406 and alternately through the jack 1426 which is selectively coupled to the remote unit 1305. The control switches may include an on/off switch 1424, an activation switch 1420, a brightness control switch 1422 and the like. In one embodiment, the switches are activation buttons 1420, 1422 and 1424. As illustrated, the operating switches 1420, 1422 and 1424 are connected to control the control circuit 1425.
FIG. 15 illustrates a rear view of the range finder 1300 coupled to a firearm 1311. As illustrated, the range finder 1300 includes the display 1416 which is located on the display end 1462. In one embodiment, the display 1416 is encased in the display end 1462 of range finder 1300. In another embodiment, the display 1416 extends from the display end 1462 of the range finder 1300.
FIG. 16, is another perspective of the range finder 1300 of the present invention. FIG. 16, illustrates the path of the beam or signal and the line of sight provided by the scope 109. In this embodiment, the mounting brackets 1600A and 1600B of the range finder 1300 are integrated with the mounting brackets 1605A and 1605B that mount the scope 1309 to the firearm 1311. Mounting brackets 1605A and 1605B can be referred to as the receiver of the scope. Accordingly, in some embodiments of the present invention, the mounting mechanism of the scope is used to mount the range finder 1300 to the scope 1309. Further in some embodiments of the present invention where the range finder 1300 is directly mounted to a scope mount, a scope 1309 need not be present. This embodiment is especially useful for individuals who have eye problems or disabilities that do not allow them to use a scope 1039. Further in this embodiment, when the scope 1309 is not attached, the user can simply use the iron sights on the firearm to aim through the scope ring of the scope mounting brackets 1605A, 1605B.
While the invention has been described with reference to an exemplary embodiment(s), it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment(s) disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.

## Claims

1. An optical range finder comprising:
a housing having a front end, a rear end, a side plate, and a bottom surface extending between the front end and the rear end;
range finder circuitry located within the housing;
a lens located at the front end of the housing;
a display located at the rear end of the housing;
a port extending into the side plate;
a plurality of threaded apertures extending upwardly into the bottom surface of the housing;
a stabilizing recess extending upwardly into the bottom surface of the housing for receiving a stabilizing nub on a weapon mount; and
screws extending upwardly through the weapon mount and into at least one of the plurality of attaching apertures thereby securing the range finder to the weapon mount.

2. The range finder of claim 1, further comprising:
buttons for controlling operation of the rangefinder located on the housing.

3. The range finder of claim 2, wherein the buttons are located on the rear end adjacent the display.

4. The range finder of claim 1, wherein the side plate extends perpendicularly between the front end and the rear end.

5. The range finder of claim 4, further comprising:
a battery compartment extending into the side plate.

6. The range finder of claim 1, further comprising:
a plurality of screws extending into the side plate for attaching the side plate to the housing.

7. A range finder for a weapon, the range finder comprising:
a housing including a front end, a back end, a top, a bottom, a left side and a right side;
a lens mounted at the front end of the housing;
a signal generation circuit located within the housing for generating signals to project out of the front end of the housing;
a signal receiving circuit located within the housing for receiving the generated signals reflected off an object and back through the lens;
a range finding circuit located within the housing for processing the received signals and determining distance to the object;
a liquid crystal display for displaying the distance determined by the range finding circuit, the liquid crystal display mounted at the back end of the housing; and
at least one threaded attaching aperture extending upwards into the rangefinder from the bottom for attaching the range finder to a weapon mount having a mounting rail;
a stabilizing recess extending upwards into the rangefinder from the bottom for receiving a stabilizing nub on the weapon mount;
at least one screw extending upwards through the weapon mount into the at least one threaded attaching aperture, thereby securing the range finder to the weapon mount.

8. The range finder of claim 7, wherein the front end is parallel to the back end, the top is parallel to the bottom, and the left side is parallel to the right side.

9. The range finder of claim 7, further comprising:
buttons for controlling the operation of the range finder located below the display on the back end of the housing.

10. The range finder of claim 7, further comprising:
a battery compartment extending into the range finder from one side, the battery compartment having a circular, threaded cover.

11. The range finder of claim 7, further comprising:
a remote control port extending into the range finder from one side.

12. The range finder of claim of claim 11, further comprising:
a remote control electrically connected to the range finder circuit through the remote control port.

13. The range finder of claim 7, wherein the weapon mount comprises a scope ring.

14. The range finder of claim 7, wherein the weapon mount comprises a clamp.