Back to results
US 5,213,025 AGranted
Conical rod piston
AssigneeThomas Industries, Inc.
InventorRoy J. Rozek
Life of this patent
Estimating the term…
Abstract
A one-piece piston assembly including a hollow frusto-conical piston is secured to a crankshaft ring via a hollow joint or waist member. Preferably the joint or waist member is frusto-conically shaped as well.
Claims11
A plastic piston assembly, comprising:
- (a) a plastic annular crankshaft ring;
- (b) a plastic hollow frusto-conical piston body having an apex and a piston head end remote from the apex;
- (c) a plastic hollow joint member extending between and joining said apex to said crankshaft ring, the joint member interconnecting an outer wall of the crankshaft ring and the apex of the frusto-conical piston body;
- (d) a plastic working surface member secured to the piston head end of the piston body remote from the apex;
- and
- (e) an annular seal secured between the working surface member and the piston head end of the piston body.
3 more elements
A unitary piston assembly, comprising:
- (a) a crankshaft ring molded about a bearing;
- (b) a piston formed by a frusto-conical body having an
- apex;
- and
- (c) a hollow frusto-conical joint member that connects said apex of said piston body to said crankshaft ring.
2 more elements
A pump, comprising:
- (a) a pump manifold;
- (b) a cylinder operatively attached to said manifold;
- and
- (c) a unitary piston assembly cooperating with said cylinder, said piston assembly including a hollow frusto-conically shaped piston body having an apex extending in converging fashion from said cylinder, a crankshaft ring attached to said apex and being molded about a bearing, and a hollow joint member extending between said piston body and said ring, said joint member extending between said apex and said crankshaft ring.
1 more element
Dependencies are inferred from the claim text.