Vojtech A Dvorak

US Patent:

8602784, Dec 10, 2013

Filed:

Dec 4, 2009

Appl. No.:

13/132965

Inventors:

Vojtech Dvorak - Tulsa OK, US

International Classification:

F41A 33/00

US Classification:

434 18, 434 11

Abstract:

An apparatus for non-permanent conversion of a semiautomatic pistol into a compressed gas powered weapon simulator. The apparatus replaces the pistol's barrel, recoil spring and magazine with no modification of the pistol, which allows retaining the operational functions of the pistol's remaining components. Compressed gas, from the simulation magazine unit, is used in the compressed gas valve means, in the barrel unit, to operate the slide mechanism, to compress the simulation recoil spring, and to emit a laser pulse beam on a target when activated by the firing mechanism; and battery power, from the simulation magazine unit, is used to count the number of shots, lock the slide after a predetermined number of shots and transmit information from the weapon simulator to a remote data system. The compressed simulation recoil spring returns the slide mechanism back to its original position, unless locked open by the apparatus.

US Patent:

20050191601, Sep 1, 2005

Filed:

Feb 26, 2004

Appl. No.:

10/787690

Inventors:

Vojtech Dvorak - Jenks OK, US

International Classification:

G09B019/00

US Classification:

434016000

Abstract:

A training weapon which is quickly and easilyassembled from a standard weapon without requiring any physical modification (alteration) of any component of the standard weapon. A few components of the standard weapon are removed and replaced by components of the invention. This replacement does not exceed skill level beyond a standard field-strip procedure of the particular weapon. Action of the training weapon is of the same character as the action of the standard weapon, while developing trainee's responses to the substitute firing action, and at the same time improving trainee's skill, all without the use of live ammunition. Installed components include means of cycling the the weapon's mechanism thus simulating recoil using compressed gas, optional laser pointer activating a target, and a replacement magazine including source of electricity and an electronic control circuit and operable with a gas passage unit. Weapon's original trigger mechanism remains unchanged and is utilized to initiate the substitute firing cycle.

US Patent:

57619549, Jun 9, 1998

Filed:

Jan 21, 1997

Appl. No.:

8/785383

Inventors:

Vojtech Dvorak - Tulsa OK

International Classification:

G01L 514

US Classification:

73167

Abstract:

A device for measuring the entire profile of a firearm's trigger performance. This device may be either hand held or permanently mounted. The device may be connected to a sensor for sensing strike of the firing pin and connected to a computer for graphically and numerically displaying data relating to the firearm's performance. The device is capable of calculating key firearm performance parameters, including lock time and roughness of the trigger profile.

US Patent:

20210348720, Nov 11, 2021

Filed:

Mar 8, 2021

Appl. No.:

17/195637

Inventors:

Vojtech Dvorak - Tulsa OK, US

International Classification:

F17C 5/00
F41A 33/06
F17C 13/04

Abstract:

A gas magazine for a pneumatic weapon simulator. A gas magazine fill station for a pneumatic weapon simulator. A method of filling a gas magazine for a pneumatic weapon simulator. The apparatus for filling and refilling a fluid reservoir of a magazine for a pneumatic firearm simulator from a source of pressurized fluid of the present disclosure includes: a receiver for receiving the magazine; a passage for conveying the pressurized fluid from the source of pressurized fluid to the fluid reservoir of the magazine received in the receiver; and, a vent valve in fluid communication with the passage for venting the pressurized fluid from the passage. The apparatus may further include a vent channel in fluid communication with the vent valve. The apparatus may also include a valve in fluid communication with the passage which is adapted for permitting pressurized fluid to be conveyed through the passage; and alternately, prevent pressurized fluid from being conveyed through the passage.

US Patent:

20190226792, Jul 25, 2019

Filed:

Jan 22, 2019

Appl. No.:

16/254253

Inventors:

Vojtech Dvorak - Tulsa OK, US

International Classification:

F41A 33/06
F41A 19/13

Abstract:

A composite striker for a firearm simulator which employs a firing pin and provides pneumatic recoil. The composite striker including at least a first segment constructed of a material which is softer than the firing pin and at least a second segment being suitable for displacing a valve in order to initiate the pneumatic recoil.

US Patent:

20150226516, Aug 13, 2015

Filed:

Sep 9, 2014

Appl. No.:

14/480635

Inventors:

Vojtech Dvorak - Tulsa OK, US

International Classification:

F41B 11/62
F41B 11/50
F41B 11/723
F41A 33/06
F41A 33/02

Abstract:

Apparatus for conversion of a firearm into a compressed gas powered firearm simulator for simulating shooting including a simulated barrel unit, which includes a rechargeable compressed gas reservoir therein. The reservoir in the barrel unit is rechargeable via a fill port included in the barrel unit, and a metering valve provided in the barrel unit permits the pulsed release of compressed gas from the barrel unit to simulate firing.