John R Ditsch

US Patent:

56905858, Nov 25, 1997

Filed:

Jan 23, 1996

Appl. No.:

8/590164

Inventors:

John R. Ditsch - Bolingbrook IL

Assignee:

HDS, Inc. - Bolingbrook IL

International Classification:

A63B 2316

US Classification:

482 47

Abstract:

A hand development apparatus is provided with a first housing having an interior cavity formed therein and a gripping portion adapted to fit the palm of a person's hand and a second housing having an interior cavity formed therein and a gripping portion adapted to fit the palm of a person's hand. The apparatus has a carrier adapted to be removably fitted within the interior cavity of the first housing or within the interior cavity of the second housing, a plurality of movable elements associated with the carrier, the movable elements being adapted to accommodate the fingers of a person's hand and being movable along a movement direction, and springs for resisting movement of the movable elements along the movement direction. The width of the first housing is substantially different than the width of the second housing so that the apparatus may be configured either for a person having relatively large hands or a person having relatively small hands. The movable elements may be provided in a staggered relationship when in their extended positions.

US Patent:

46781811, Jul 7, 1987

Filed:

Sep 8, 1986

Appl. No.:

6/904851

Inventors:

John R. Ditsch - Tinley Park IL
Theodore G. Williams - Lyons IL
Luis H. Berrios - Chicago IL

Assignee:

HDS, Inc. - Tinley Park IL

International Classification:

A63B 1108

US Classification:

272 68

Abstract:

A hand development system to increase the strength and flexibility of the hands, fingers and forearms of a user. It includes a body adapted to be gripped by the hand of the user and a plurality of individually movable members operatively associated with the body. Each of the individually movable members, which may be in the form of keys, is adapted to be moved by one of the fingers of the user against resistance to movement provided by a component such as a spring. It includes a set of replaceable cartridges disposed in an interior compartment of the body for this purpose. With this construction, the cartridges each include at least one spring having a selected resistance to movement and each of the cartridges is positioned to resist movement of one of the keys.

US Patent:

D2946149, Mar 8, 1988

Filed:

Jul 16, 1985

Appl. No.:

6/755695

Inventors:

John R. Ditsch - Tinley Park IL
Theodore G. Williams - Lyons IL
Luis H. Berrios - Chicago IL

Assignee:

HDS, Inc. - Tinley Park IL

US Classification:

D21198

US Patent:

D3856038, Oct 28, 1997

Filed:

Jan 23, 1996

Appl. No.:

D/049343

Inventors:

John R. Ditsch - Bolingbrook IL

Assignee:

HDS, Inc. - Bolingbrook IL

International Classification:

2102

US Classification:

D21198