Douglas A Macleod

US Patent:

40418880, Aug 16, 1977

Filed:

Oct 26, 1976

Appl. No.:

5/735435

Inventors:

Ralph W. Hooper - Newtown Square PA
Douglas A. MacLeod - Wenonah NJ
Clarence G. Murray - Media PA

Assignee:

Interstate and Ocean Transport Company - Philadelphia PA

International Classification:

B63B 2156

US Classification:

114248

Abstract:

Thrust transmittal means for push tug and barge comprises, on the barge, a rearwardly projecting thrust receiving member having a hemispheric convex rear surface and, on the tub, a concave hemispheric thrust exerting surface. Preferably, a plurality of such thrust exerting members are disposed at vertically spaced points along the bow of the tug. An articulated joint to permit relative pitching of tug and barge is thus provided with no coupling device other than the normal chains, cables or lines, suspended in tension between the tug and barge to prevent separation thereof. Preferably, such chains, cables or lines include a hook and eye link with releasable retainer to facilitate unhooking of same, even under emergency conditions. At the rear of the barge, a deep notch with sidewalls is provided to receive the bow of the tug with fenders between these sidewalls and the adjacent tug sides to prevent relative roll between tug and barge.

US Patent:

39930149, Nov 23, 1976

Filed:

Aug 7, 1975

Appl. No.:

5/602557

Inventors:

Ralph W. Hooper - Newtown Square PA
Douglas A. MacLeod - Wenonah NJ
Clarence Murray - Media PA

Assignee:

Interstate Oil Transport Company - Philadelphia PA

International Classification:

B63B 2156

US Classification:

114235R

Abstract:

Thrust transmittal means for push tug and barge comprises, on the tug, a forwardly projecting member with a hemispheric convex frontal surface and, on the barge, a concave hemispheric thrust receiving surface. Preferably, several (or at least two) such receiving members are mounted at vertically spaced points on the rear of the barge. An articulated joint (to permit relative pitching of tug and barge) is thus provided with no coupling device other than the normal chains, cables or lines, suspended in tension between the tug and barge to prevent separation thereof. Preferably, such chains, cables or lines include a hook and eye link with a releasable retainer to facilitate unhooking of same, even under emergency conditions. At the rear of the barge, a deep notch with sidewalls is provided to receive the bow of the tug with fenders between these sidewalls and the adjacent tug sides to prevent relative roll between tug and barge.