Agustin RojoSan Juan, PR

4629904, Dec 16, 1986

Mar 21, 1984

6/591952

Agustin Rojo - Guaynabo PR
Jorge Leiseca - Santurce PR

F03B 1308

290 52

A small-scale hydroelectric generator has a micro-hydro axial-flow turbine mounted in a lower end of a penstock, preferrably of the siphon type, through which water is diverted from an intake basin. The turbine comprises a stator section formed with an axial core providing an annular passageway having an outlet end in close proximity to a rotor of a coaxial adjacent rotor section. The blades of the rotor have a length equal to the internal radius of the passageway. A plurality of flaps are arranged in an expandable circle between the stator section and rotor. A float mechanism located in the intake basin follows the water level and controls the extended positions of the flaps reducing the water flow through the penstock in a predetermined relation to the water level. The annular passageway has fixed vanes directing the stream of water in a helical swirling motion of predetermined pitch to impinge upon the blades which are disposed to receive the stream at an optimum angle of 90. degree. . The generator is located remote from the turbine with a closed hydraulic system comprising a variable displacement pump located at and driven by the turbine and a hydraulic motor located at and driving the generator.

D251616, Apr 17, 1979

Apr 12, 1977

5/786789

Agustin Rojo - Bayamon PR

D2503

D25 33

4127971, Dec 5, 1978

May 16, 1977

5/797292

Agustin Rojo - Bayamon PR

E04H 112
E04H 906

52 7911

A tripling or more in the production rate of precast concrete building units utilizing reusable mold forms is achieved by casting the units vertically on a wheeled base between separable vertical mold forms. The partially cured poured concrete unit is horizontally transported on the wheeled base from between the separated molds to complete the curing independently thereof, the forms being immediately serviceable with another wheeled base for molding another unit. A building is erected on a concrete slab foundation using a plurality of precast concrete units in the form of L-shaped walls positioned as corner structure and spaced intermediate exterior wall elements and as interior partitions and roof supports. The L-shaped walls are bolted to the foundation by anchoring means located in cutout portions along the bottom of each wall and H-beams are placed to extend across the tops of the walls and are filled with concrete to serve as support and anchoring means for precast concrete roof slabs and to bridge the spaces between the concrete walls as lintels for doors and windows which complete the exterior wall enclosure of the building.