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US 4,890,406 AGranted
Ramrod
AssigneeK. W. Thompson Tool Company, Inc.
InventorKendrick L. French
Life of this patent
Estimating the term…
Abstract
Ramrod having an inner rod formed of glass-reinforced polymer and an outer tube formed of a non-abrasive, heat-shrinkable polymer.
Claims4
A ramrod, comprising:
- (a) an elongated rod having a first and a second end and formed of a rigid material, and
- (b) a tube covering a substantial portion of the rod, the tube being formed of a non-abrasive substance wherein the rod is formed of a glass-fibre reinforced polymer, and wherein the tube is formed of a heat-shrinkable polymer.
A ramrod, comprising:
- (a) an elongated rod having a first and a second end and formed of a rigid material, and
- (b) a tube covering a substantial portion of the rod, the tube being formed of a non-abrasive substance, wherein a cap element is mounted on the first end of the rod, wherein a jag element is mounted on the second end of the rod, and wherein the cap element has a conical recess on its end face and an axially-extending relief bore extending through its length.
Dependencies are inferred from the claim text.