Golf club heads and methods to manufacture golf club heads

Abstract

Embodiments of golf club heads, golf clubs, and methods to manufacture golf club heads and golf clubs are described herein. In one example, a golf club head includes a body portion with a front opening and a back opening, a face portion closing the front opening, and a back cover portion that closes the back opening and includes at least 50% of the total area of the back portion, a first port, and a second port. A first mass portion and a second mass portion engage the first port and the second port to close the first port and a second port, respectively. The first mass portion and the second mass portion each includes a material with a greater density than the material of the body portion and the material of the back cover portion. Other examples and embodiments may be described and claimed.

What is claimed is: 
     
         1 . A golf club head comprising:
 a hollow body portion comprising a front portion with a face portion, a back portion with a back opening, a first flange portion between the back opening and the face portion and including a first flange bore, and a second flange portion between the back opening and the face portion and including a second flange bore;   a back cover portion coupled to the hollow body portion to close the back opening, the back cover portion comprising:
 a first port extending through the back cover portion and axially aligned with the first flange bore, a distance between the first port and a toe portion edge of the hollow body portion being less than a distance between the first port and a heel portion edge of the hollow body portion; and 
 a second port extending through the back cover portion and axially aligned with the second flange bore, a distance between the second port and the heel portion edge being less than a distance between the first port and the heel portion edge; 
   a first mass portion configured to engage the first port and the first flange bore to secure the back cover portion to the first flange portion; and   a second mass portion configured to engage the second port and the second flange bore to secure the back cover portion to the second flange portion,   wherein the first mass portion comprises a material having a greater density than a material of the hollow body portion and a material of the back cover portion,   wherein the second mass portion comprises a material having a greater density than a material of the hollow body portion and a material of the back cover portion,   wherein the hollow body portion has a volume of less than or equal to 100 cubic centimeters, and   wherein the back cover portion comprises at least 50% of a total area of the back opening.   
     
     
         2 . A golf club head as defined in  claim 1 , wherein the hollow body portion is at least partially filled with a filler material. 
     
     
         3 . A golf club head as defined in  claim 1 , wherein the back cover portion comprises a material having a lower density than the material of the hollow body portion. 
     
     
         4 . A golf club head as defined in  claim 1 , wherein the back cover portion comprises a composite-type material. 
     
     
         5 . A golf club head as defined in  claim 1 , wherein the first port and the second port are configured to interchangeably receive the first mass portion and the second mass portion. 
     
     
         6 . A golf club head as defined in  claim 1  further comprising a third mass portion coupled to the hollow body portion between the first mass portion and the second mass portion, wherein the third mass portion has a greater mass than the first mass portion, and wherein the third mass portion has a greater mass than the second mass portion. 
     
     
         7 . A golf club head as defined in  claim 1  further comprising a third mass portion coupled to the hollow body portion between the first mass portion and the second mass portion, wherein a maximum width of the hollow body portion is between the first mass portion and the third mass portion proximate to the toe portion edge. 
     
     
         8 . An iron-type golf club head comprising:
 a hollow body portion comprising a front portion with a front opening and a back portion with a back opening;   a face portion coupled to the front portion to close the front opening;   a back cover portion coupled to the back portion to close the back opening, the back cover portion comprising:   a first port extending through the back cover portion, a distance between the first port and a toe portion edge of the hollow body portion being less than a distance between the first port and a heel portion edge of the hollow body portion; and   a second port extending through the back cover portion, a distance between the second port and the heel portion edge being less than a distance between the first port and the heel portion edge;   a first mass portion configured to engage the first port to close the first port; and   a second mass portion configured to engage the second port to close the second port,   wherein the first mass portion comprises a material having a greater density than a material of the hollow body portion and a material of the back cover portion,   wherein the second mass portion comprises a material having a greater density than a material of the hollow body portion and a material of the back cover portion, and   wherein the back cover portion comprises at least 50% of a total area of the back portion.   
     
     
         9 . An iron-type golf club head as defined in  claim 8 , wherein the hollow body portion is at least partially filled with a filler material having a greater elasticity than a material of the hollow body portion and a material of the face portion. 
     
     
         10 . An iron-type golf club head as defined in  claim 8 , wherein the back cover portion comprises a composite-type material. 
     
     
         11 . An iron-type golf club head as defined in  claim 8 , wherein the first mass portion engages the hollow body portion to attach the back cover portion to the hollow body portion. 
     
     
         12 . An iron-type golf club head as defined in  claim 8 , wherein the second mass portion engages the hollow body portion to attach the back cover portion to the hollow body portion. 
     
     
         13 . An iron-type golf club head as defined in  claim 8 , wherein a perimeter portion of the back cover portion engages a perimeter portion of the back opening to maintain the back cover portion coupled to the hollow body portion. 
     
     
         14 . An iron-type golf club head as defined in  claim 8  further comprising a third mass portion having a greater mass than the first mass portion and the second mass portion. 
     
     
         15 . An iron-type golf club head comprising:
 a body portion comprising an interior cavity, a front portion with a front opening, and a back portion with a back opening;   a face portion coupled to the front portion to close the front opening;   a back cover portion coupled to the back portion to close the back opening, the back cover portion comprising a composite-type material;   a first mass portion comprising a material having a greater density than a material of the body portion; and   a second mass portion comprising a material having a greater density than the material of the body portion,   wherein the first mass portion is configured to attach the back portion to the body portion at a location between a center portion of the back portion and a toe portion edge of the body portion,   wherein the second mass portion is configured to attach the back portion to the body portion at a location between the center portion of the back portion and a heel portion edge of the body portion,   wherein the body portion has a volume of less than or equal to 100 cubic centimeters, and   wherein the back cover portion comprises at least 50% of a total area of the back portion.   
     
     
         16 . An iron-type golf club head as defined in  claim 15 , wherein the face portion and the back cover portion define the interior cavity, and wherein the interior cavity is at least partially filled with a filler material. 
     
     
         17 . An iron-type golf club head as defined in  claim 15  further comprising a third mass portion coupled to the body portion at or proximate to the center portion of the back portion. 
     
     
         18 . An iron-type golf club head as defined in  claim 15  further comprising a third mass portion coupled to the body portion at or proximate to the center portion of the back portion, wherein the face portion and the back cover portion define the interior cavity, wherein a maximum width of the body portion is between the first mass portion and the third mass portion proximate to the toe portion edge of the body portion. 
     
     
         19 . An iron-type golf club head as defined in  claim 15 , wherein a perimeter portion of the back cover portion engages a perimeter portion of the back opening to maintain the back cover portion coupled to the body portion. 
     
     
         20 . An iron-type golf club head as defined in  claim 15 , wherein the face portion comprises a plurality of grooves on an outer side of the face portion, and at least one groove on an inner side of the face portion.