Abstract: One manifestation of an advanced superventuri power source comprises: (i) a series of at least three venturi tubes with at least one threesome of the tubes labeled an alpha-, beta-, and gamma-venturi tube respectively, and of predetermined successively increasing flow capacity respectively; (ii) the alpha- and beta-venturi tubes each having an open entrance to permit flow through the respective open entrance and out of the respective open exit; (iii) respective inlets of the threesome each facing the intended direction of flow; (iv) the open exits of the alpha- and beta-venturi tubes placed adjacent the throats of the beta- and gamma-venturi tubes, respectively, so that respective central axes of the threesome essentially merge into a central super-axis along an intended line of flow; (v) as referenced from the super-axis, the inlets of the alpha-, beta-, and gamma-venturi tubes being positioned to intercept relatively inner, intermediate, and outer portions of the selected medium as an alpha-, beta-, and gam

Abstract: A superventuri power source comprises: (i) a series of at least two venturi tubes with at least one twosome of the tubes labeled an alpha- and a beta-venturi tube, respectively, and of predetermined successively increasing flow capacity, respectively; (ii) the alpha-venturi tube having an open entrance and an open exit to permit flow through the open entrance and out of the open exit; (iii) respective inlets of the twosome each facing the intended direction of flow; (iv) the open exit of the alpha-venturi tube placed adjacent the throat of the beta-venturi tube so that respective central axes of the twosome essentially merge into a central super-axis along an intended line of flow; (v) as referenced from the super-axis, the inlets of the alpha- and beta-venturi tubes being positioned to intercept relatively inner and outer portions of a selected medium as an alpha- and a beta-flow, respectively, whereby alpha-flow as exhaust from the open exit of the alpha-venturi tube joins accelerated beta-flow adjacent the

Abstract: A golf clubhead with enhanced moments of inertia along both its twist and loft axes has a toe weight means of a first predetermined density comprising first and second substantial percentages as upper and lower concentrations of mass positioned respectively in predetermined fixed locations adjacent the top and bottom corners of the toe between the striking surface and the back. A medium of a second predetermined density less dense than the first predetermined density of the toe weight means may substantially separate the upper concentration from the lower concentration, the upper concentration and may generally separate from the central boundary of the toe section.

Abstract: A golf clubhead comprises a body having a predetermined lower density and a head weight means is of a predetermined higher density. There is also a toe weight means of the portion of the head weight means in the toe section. The clubhead may have a mass profile means to position: (i) a substantial portion of the mass of the toe weight means away from the center of mass of the clubhead toward the toe; and (ii) the center of mass of the toe weight means behind the extreme front of the ball striking surface no higher than the mid-height of the toe weight means. A characteristic feature of said substantial portion of the toe weight means adjacent the toe comprises an expanded surface whereby both the height and width of the substantial portion of the toe weight means are generally greater than the length of said substantial portion of the toe weight means.

Abstract: In its basic form, the corner-back configuration has a weight extending behind each corner of the ball striking surface. This may be viewed as a double split of the weights. The first split positions the weights toward the toe and heel, respectively, to reduce twisting along the vertical twist axis. The second split positions the respective toe and heel weights so that there are weights of the upper and lower toe together with weights of the upper and lower heel to reduce loft variations along the horizontal loft axis. The corner-back design offers the clubhead designer the opportunity to optimize moments of inertia and inertial efficiencies along both the vertical twist axis and the horizontal loft axis. The degree of optimization along a particular axis becomes his or her choice. The quantizing of the weights arises in part because of the need to constrain the center of mass of the clubhead. It is desirable that the center of mass be neither too far behind the striking face not too high on the clubhead.

Abstract: A golf clubhead includes a lower density body with a corner-back system of higher density weights. In its basic form the corner-back system has a weight in each corner of the golf clubhead. In other forms the weights may be variously joined, one or more may be deleted, or there may be more than four. The basic form of the corner-back system may be viewed as having a double split of a head weight. The first split yields a toe wieght and a heel weight to reduce twisting along the vertical twist axis. The second split yields upper and lower toe weights and upper and lower heel weights to reduce twisting along the horizontal loft axis. The corner-back system offers a designer an opportunity to optimize moments of inertia along both the vertical twist and the horizontal loft axes. The degree of optimization along either axis is a matter of choice. The quantization of the weights into a double split arises because of constraints by the clubhead's center of mass.

Abstract: There is disclosed a putter head no longer, no wider, no higher, nor heavier than ordinary at 5.0.times.2.0.times.1.2 inches and 302 grams. Yet, it has a polar moment of inertia about 8300 g-cm.sup.2.The polar inertial efficiency of a golf clubhead is defined as its actual moment of inertia divided by its maximum theoretical polar moment of inertia.The theoretical polar moment of inertia is an intrinsic property of every golf clubhead. It is determined by positioning half the mass of the head at a toe point and the other half at a heel point a heel-to-toe length apart, and then calculating the polar moment of inertia from the center of mass for the system. Thus, for the preceeding head the theoretical moment of inertia is 12,200 g-cm.sup.2 giving an inertial efficiency in excess of 0.69.By comparison, the polar inertial efficiency of any thin bar is shown to be 0.33. Prior art clubheads generally have inertial efficiencies close to this value, with the best clubheads having values slightly larger.