Zachary David Krapfl
Engineers at Shadow Crk Dr 302, Boulder, CO
License number
Colorado 52113
Issued Date
Jun 17, 1997
Renew Date
Jun 17, 1997
Type
Engineer Intern
Address
Address
2892 Shadow Creek Dr, Boulder, CO 80303
Professional information
Releasable Connection Mechanism For Variable Stride Exercise Devices
US Patent:
8062187, Nov 22, 2011
Filed:
Jun 15, 2010
Appl. No.:
12/815616
Inventors:
Andrew P. Lull - Boulder CO, US
Keith M. Weier - Poway CO, US
Zachary D. Krapfl - Boulder CO, US
Chester F. Kowalewski - Broomfield CO, US
Jonathan B. Watt - Broomfield CO, US
Keith M. Weier - Poway CO, US
Zachary D. Krapfl - Boulder CO, US
Chester F. Kowalewski - Broomfield CO, US
Jonathan B. Watt - Broomfield CO, US
Assignee:
Nautilus, Inc. - Vancouver WA
International Classification:
A63B 22/04
US Classification:
482 52, 482 57, 482 51
Abstract:
The present invention provides for a variable stride exercise device having a variable size close curved striding path during use. The exercise device described and depicted herein utilizes various configurations of linkage assemblies, cam members, and other components, connected with a frame to allow a user to dynamically vary his stride path during exercise. An exercise device conforming to aspects of the present invention provides a foot path that adapts to the change in stride length rather than forcing the user into a fixed size path. Some embodiments of the exercise device include a lockout device that selectively eliminates the variable stride features of the exercise device and allows the user to exercise in a stepping motion. Other aspects of the present invention relate to a releasable connection mechanism that can be used to selectively and/or automatically limit or eliminate the variable stride feature of an exercise device.
Releasable Connection Mechanism For Variable Stride Exercise Devices
US Patent:
7736278, Jun 15, 2010
Filed:
Jun 21, 2005
Appl. No.:
11/158887
Inventors:
Andrew P. Lull - Boulder CO, US
Keith M. Weier - Lafayette CO, US
Zachary D. Krapfl - Boulder CO, US
Chester F. Kowalewski - Broomfield CO, US
Jonathan B. Watt - Broomfield CO, US
Keith M. Weier - Lafayette CO, US
Zachary D. Krapfl - Boulder CO, US
Chester F. Kowalewski - Broomfield CO, US
Jonathan B. Watt - Broomfield CO, US
Assignee:
Nautilus, Inc. - Vancouver WA
International Classification:
A63B 22/04, A63B 22/06
US Classification:
482 52, 482 57
Abstract:
The present invention provides for a variable stride exercise device having a variable size close curved striding path during use. The exercise device described and depicted herein utilizes various configurations of linkage assemblies, cam members, and other components, connected with a frame to allow a user to dynamically vary his stride path during exercise. An exercise device conforming to aspects of the present invention provides a foot path that adapts to the change in stride length rather than forcing the user into a fixed size path. Some embodiments of the exercise device include a lockout device that selectively eliminates the variable stride features of the exercise device and allows the user to exercise in a stepping motion. Other aspects of the present invention relate to a releasable connection mechanism that can be used to selectively and/or automatically limit or eliminate the variable stride feature of an exercise device.
Variable Stride Exercise Device
US Patent:
7758473, Jul 20, 2010
Filed:
Aug 20, 2008
Appl. No.:
12/194616
Inventors:
Andrew P. Lull - Boulder CO, US
Zachary D. Krapfl - Boulder CO, US
Chester F. Kowalewski - Broomfield CO, US
Jonathan B. Watt - Broomfield CO, US
Zachary D. Krapfl - Boulder CO, US
Chester F. Kowalewski - Broomfield CO, US
Jonathan B. Watt - Broomfield CO, US
Assignee:
Nautilus, Inc. - Vancouver WA
International Classification:
A63B 69/16, A63B 22/02
US Classification:
482 52, 482 57, 482 51
Abstract:
The variable stride exercise device utilizes various configurations of linkage assemblies, cam members, and other components, connected with a frame to allow a user to dynamically vary the user's stride path during exercise. The exercise device allows for a foot engagement member travel path that adapts to the change in stride length rather than forcing the user into a fixed size path. A user's exertion level may have several components impacting the stride length provided by the machine, such as leg power, torso power, and (in versions of the exercise apparatus with arm supports or exercise components) arm power. The exercise device may include a lockout device that selectively eliminates the variable stride features of the exercise device and allows the user to exercise in a stepping motion.
Variable Stride Exercise Device
US Patent:
2010028, Nov 11, 2010
Filed:
Jul 19, 2010
Appl. No.:
12/839232
Inventors:
Andrew P. Lull - Boulder CO, US
Zachary D. Krapfl - Boulder CO, US
Chester F. Kowalewski - Broomfield CO, US
Jonathan B. Watt - Broomfield CO, US
Zachary D. Krapfl - Boulder CO, US
Chester F. Kowalewski - Broomfield CO, US
Jonathan B. Watt - Broomfield CO, US
Assignee:
Nautilus, Inc. - Vancouver WA
International Classification:
A63B 22/04
US Classification:
482 52
Abstract:
The variable stride exercise device utilizes various configurations of linkage assemblies, cam members, and other components, connected with a frame to allow a user to dynamically vary the user's stride path during exercise. The exercise device allows for a foot engagement member travel path that adapts to the change in stride length rather than forcing the user into a fixed size path. A user's exertion level may have several components impacting the stride length provided by the machine, such as leg power, torso power, and (in versions of the exercise apparatus with arm supports or exercise components) arm power. The exercise device may include a lockout device that selectively eliminates the variable stride features of the exercise device and allows the user to exercise in a stepping motion.