US3831423A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making golf ball molds
Assignee: Acushnet Co
•
Filing: 1973-01-26
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Granted: 1974-08-27
•
Expires: 1993-01-26
Abstract
Abstract A method of making molds for the production of golf balls is disclosed. A hob is made of approximately the same dimensions as half of the finished golf ball and then a mold is formed from the hob.
Inventors
- 👤 R Brown
- 👤 J Jepson
- 👤 H Lyon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:14
CPC Classifications
B; B21; B21K; B21K5/00; B21K5/20
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
166 words
The method of making a golf ball mold which comprises: a. forming a golf ball hob having an arcuate section of substantially the same dimensions as the finished, unpainted golf ball to be formed from the golf ball mold; b. contacting the arcuate section of the golf ball hob with the cavity of a golf ball mold blank having a cavity therein, said cavity having a depth less than the height of the arcuate section of the golf ball hob and said cavity having a diameter at its equator of greater dimension than the diameter of the arcuate section of the golf ball hob at the equator of the arcuate section; c. applying pressure to cause a negative of at least the arcuate section of the golf ball hob shape to be imparted to the golf ball mold blank; and d. separating the golf ball hob from the golf ball mold including expanding of the equator of the mold away from the equator of the hob.
Claim 2
Independent Claim
166 words
The method of making a golf ball mold which comprises: a. forming a golf ball hob having an arcuate section of substantially the same dimensions as the finished, unpainted golf ball to be formed from the golf ball mold; b. contacting the arcuate section of the golf ball hob with the cavity of a golf ball mold blank having a cavity therein, said cavity having a depth less than the height of the arcuate section of the golf ball hob and said cavity having a diameter at its equator of greater dimension than the diameter of the arcuate section of the golf ball hob at the equator of the arcuate section; c. applying pressure to cause a negative of at least the arcuate section of the golf ball hob shape to be imparted to the golf ball mold blank; and d. separating the golf ball hob from the golf ball mold including expanding of the equator of the mold away from the equator of the hob.
Claim 3
Dependent Claim
21 words
The method of claim 1 wherein the equator of the golf ball mold blank is heated to cause it to expand.
Claim 4
Dependent Claim
16 words
The method of claim 1 wherein the golf ball mold blank is provided with tapered sidewalls.
Claim 5
Dependent Claim
27 words
The method of claim 1 wherein the golf ball mold blank has a higher coefficient of expansion than the coefficient of expansion of the golf ball hob.
Claim 6
Dependent Claim
20 words
The method of claim 4 wherein the golf ball hob is steel and the golf ball mold blank is brass.
References Cited (Backward Citations)
US941032A
Cited
US2058395A
Cited
US2026337A
Cited
US1932426A
Cited
US2325989A
Cited
US2722047A
Cited
US2755689A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-26 | 1978-02-25 | 1978-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-26 | 1982-02-25 | 1982-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-26 | 1986-02-25 | 1986-08-27 | $7700.00 | Window Closed / Lapsed |