Injection molded threaded rotor and manufacture method
AssigneeTritex Corporation
InventorsKeith Kowalski, Nino Maini
Life of this patent
Estimating the term…
Abstract
In a preferred embodiment, a threaded rotor for a linear actuator, including: a generally cylindrical, metallic shell/insert (20); and a generally cylindrical threaded thermoplastic member (72) disposed in a wall of the generally cylindrical shell/insert, the threaded thermoplastic member having threads formed on an inner surface thereof and engagable with complementary threads formed on an outer surface of a shaft to be inserted in the generally cylindrical shell/insert.
Claims6
A threaded rotor for a linear actuator, comprising:
- (a) a generally cylindrical, metallic shell/insert having two bearing areas on an external surface thereof;
- and
- (b) a generally cylindrical threaded thermoplastic member fixedly disposed in a wall of said generally cylindrical, metallic shell/insert, said threaded thermoplastic member having threads formed on an inner surface thereof and engagable with complementary threads formed on an outer surface of a shaft to be inserted in said generally cylindrical, metallic shell/insert.
A method of manufacture of a threaded rotor for a linear actuator, comprising:
- (a) machining a generally cylindrical shell/insert having two bearing areas;
- (b) placing said generally cylindrical shell/insert in a mold;
- and
- (c) injecting a thermoplastic material into said mold such as to form a threaded thermoplastic member disposed in a wall of said shell/insert, said threaded thermoplastic member having threads formed on an inner surface thereof and engagable with complementary threads formed on an outer surface of a shaft to be inserted in said generally cylindrical shell/insert.
A method of manufacture of a threaded rotor for a linear actuator, comprising:
- (a) machining a generally cylindrical shell/insert having two bearing areas;
- (b) placing said generally cylindrical shell/insert in a mold;
- (c) injecting a thermoplastic material into said mold such as to form a threaded thermoplastic member disposed in a wall of said shell/insert, said threaded thermoplastic member having threads formed on an inner surface thereof and engagable with complementary threads formed on an outer surface of a shaft to be inserted in said generally cylindrical shell/insert, and injecting said thermoplastic material into at least one slot formed in said generally cylindrical shell/insert to permit some of said thermoplastic material to extend outwardly therein to prevent rotation of said threaded thermoplastic member in said shell/insert;
- and
- (d) inserting into said generally cylindrical shell/insert, before insertion of said shell/insert into said mold, a locking core pin and a threaded locking core pin, a thread on said threaded locking core pin forming a thread on said threaded thermoplastic material when said thermoplastic material is injected into said mold.
Dependencies are inferred from the claim text.