David Leonard Rohrer

US Patent:

47214287, Jan 26, 1988

Filed:

Sep 10, 1986

Appl. No.:

6/905857

Inventors:

David C. Rohrer - Gaston OR
Daniel F. Rohrer - Redmond OR

Assignee:

Double D Corporation - Forest Grove OR

International Classification:

B60P 100

US Classification:

414439

Abstract:

A tennis ball retrieving apparatus comprises a wheeled vehicle having a front end and a rear end. The vehicle has a ball storage container disposed at a level enabling ready removal of balls therefrom by a person next to the vehicle while the person is in a standing position. There are a pair of horizontal ball gathering arms at the front of the vehicle arranged in V formation to provide an apex portion to which gathered balls are fed. A pair of the wheels of the wheeled vehicle are in traction contact with the surface on which the vehicle is supported to be driven thereby in rotary fashion as the vehicle is moved over the supporting surface. The wheels are supported with the lower portions of the tires spaced from one another less than the diameter of a tennis ball so as to grip the same when a ball is fed thereto. A chute extends from the area just rearwardly of the lower portions of the tires upwardly to the storage container. The feed wheels are operable by successively feeding balls into the chute to cause previously fed balls by nudging contact to be fed upwardly to deposit the balls into the storage container.

US Patent:

46841261, Aug 4, 1987

Filed:

Dec 31, 1985

Appl. No.:

6/815750

Inventors:

William T. Dalebout - Portland OR
Sohrab Vassoughi - Vancouver WA
William J. Martinell - Vancouver WA
David C. Rohrer - Gaston OR
Steven W. Martinell - Vancouver WA
Robert L. Marchant - Portland OR

Assignee:

Pro Form, Inc. - Beaverton OR

International Classification:

A63B 2100

US Classification:

272134

Abstract:

An exercise machine having a frame supporting a seat in an off-the-floor position. A pair of arm levers are mounted on the frame and provide resistance to movement in two directions, with the resistance to pushing from rest positions being less than the resistance to pulling to return the arms to the rest positions. The machine has a pair of leg levers wherein resistance to movement in a pushing direction is greater than in a pulling direction. The resistance to movement of the exercising levers is provided by friction mechanisms and springs, with the frictional force being greater than the spring force. The friction mechanisms offer the same resistance in either direction of movement, but the springs aid movement of the arm levers in push, when returning them to rest positions, while aiding the foot levers in a pulling direction. The arm levers have grips rearwardly inclined from the main portions thereof for better in-line application of force by the user. The seat is rearwardly tilted to a position where hyperextension of the legs is prevented.