Valley shaping reinforcement

1. An extendable reinforced convoluted pressure hose having an extended length and a retracted length, comprising:

a) a convoluted stretch hose body having a valley portion and a ridge portion;

b) a valley reinforcement cord comprising one or more of high strength fibers with a tensile strength greater than 15,000 psi;

c) a metal biasing spring having a tendency to return the hose from the extended length to the retracted length;

wherein:

A) the valley reinforcement cord is wound in a helical path along the valley portion of the convoluted stretch hose body, whereby the valley reinforcement cord stabilizes the valley portion of the convoluted stretch hose body and substantially maintains the radial position of the valley portion at the extended length;

B) the biasing spring is located along the ridge portion of the convoluted stretch hose body, whereby the biasing spring supports the ridge portion of the stretch hose body at both the extended length and the retracted length; and

C) the stretch hose body is between the valley reinforcement cord and the biasing spring, with the biasing spring disposed on the stretch hose body's interior, and the valley reinforcement cord disposed on the stretch hose body's exterior;

D) the extended length is at least twice the retracted length.

2. The reinforced convoluted hose in claim 1 , wherein the valley reinforcement cord is coated with a polymer matrix material, wherein the coated valley reinforcement cord can be bonded to the valley portion of the convoluted stretch hose body.

3. The reinforced convoluted hose in claim 2 , wherein the convoluted stretch hose body comprises a thermoplastic and/or an elastomer.

4. The reinforced convoluted hose in claim 1 , further including a means of bonding the valley reinforcement cord to the convoluted stretch hose body for further stabilizing the valley portion of the convoluted hose.

5. The reinforced convoluted hose in claim 4 , wherein convoluted stretch hose body comprises a thermoplastic and/or an elastomer.

6. The reinforced convoluted hose in claim 1 , further including one or more valley shaping cords positioned along the walls of the valley portion.

7. The reinforced convoluted hose in claim 1 , wherein the convoluted stretch hose body comprises bidirectional fiber reinforcement.

8. The reinforced convoluted hose in claim 1 , further including a plurality of longitudinal reinforcement cords positioned on convoluted stretch hose body under the valley reinforcement cord.

9. The reinforced convoluted hose in claim 8 , wherein the plurality of longitudinal reinforcement cords are oriented so that they spiral around the convoluted stretch hose opposite the direction of the valley portion spiral.

10. An extendable reinforced convoluted pressure hose having an extended length and a retracted length, comprising:

a) a convoluted stretch hose body having a valley portion and a ridge portion;

b) a metal biasing spring disposed along the ridge portion of the convoluted stretch hose body and adapted to:

i) allow the reinforced convoluted hose to extend to the extended length when pressurized;

ii) automatically retract the convoluted hose to the retracted length when depressurized; and

iii) support the ridge portion of the convoluted stretch hose body at both the extended length and the retracted length;

c) a valley reinforcement cord disposed along the valley portion of the convoluted stretch hose body, and adapted to maintain the valley portion's radial position at the extended length;

wherein:

A) at both the extended length and the retracted length, the ridge portion of the convoluted stretch hose body has an inside diameter which is:

I) greater than or equal to an outside diameter of the biasing spring; and

II) greater than any other portion of the convoluted stretch hose body's inside diameter;

B) at the extended length, the valley portion of the convoluted stretch hose body has an outside diameter which is:

I) less than or equal to an inside diameter of the valley reinforcement cord; and

II) less than any other portion of the convoluted stretch hose body's outside diameter;

C) the extended length is at least twice the retracted length.

11. The reinforced convoluted hose of claim 10 , wherein:

a) the valley portion and the ridge portion are both helical in shape; and

b) in a longitudinal cross section of the convoluted stretch hose body, the ridge portion comprises a plurality of peaks, and the valley portion comprises a plurality of troughs;

c) maintaining the valley portion's radial position comprises, for each trough from the plurality of troughs having two neighboring peaks from the plurality of peaks, maintaining that trough at a position on the convoluted stretch hose body where the bottom of that trough is equidistant from the tops of each of its neighboring peaks.

12. The reinforced convoluted hose of claim 10 , wherein:

a) the outside diameter of the valley portion of the convoluted stretch hose body is substantially equal to the inside diameter of the valley reinforcement cord; and

b) the inside diameter of the ridge portion of the convoluted stretch hose body is substantially equal to the outside diameter of the biasing spring.

13. A method of using an extendable reinforced convoluted pressure hose, the method comprising:

a) extending the reinforced convoluted pressure hose from a retracted length to an extended length by pressurizing the convoluted pressure hose;

b) while the reinforced convoluted pressure hose is at the extended length, using it to transport a fluid from a fluid source at a first end of the reinforced convoluted pressure hose to a second end of the reinforced convoluted pressure hose from which it is discharged;

c) after using the reinforced convoluted pressure hose to transport the fluid, allowing the reinforced convoluted pressure hose to self-retract while maintaining a convoluted shape by:

i) depressurizing the convoluted pressure hose such that a natural tendency of a metal biasing spring adapted to support a ridge portion of the reinforced convoluted pressure hose at both the extended length and the refracted length returns the reinforced convoluted pressure hose from the extended length to the retracted length; and

ii) stabilizing a valley portion of the of the reinforced convoluted pressure hose with a valley reinforcement cord which is disposed along the valley portion of the reinforced convoluted pressure hose and is adapted to maintain the valley portion's radial position at the extended length;

wherein the extended length is at least twice the retracted length.

14. The method of claim 13 , wherein:

a) the valley portion and the ridge portion are both helical in shape; and

b) in a longitudinal cross section of the reinforced convoluted pressure hose, the ridge portion comprises a plurality of peaks, and the valley portion comprises a plurality of troughs;

c) maintaining the valley portion's radial position comprises, for each trough from the plurality of troughs having two neighboring peaks from the plurality of peaks, maintaining that trough at a position where the bottom of that trough is equidistant from the tops of each of its neighboring peaks.

15. The method of claim 13 , wherein the reinforced convoluted pressure hose comprises a convoluted stretch hose body between the valley reinforcement cord and the biasing spring, with the biasing spring disposed on the stretch hose body's interior, and the valley reinforcement cord disposed on the stretch hose body's exterior.