PROJECTILE FOR A MUZZLE LOADING RIFLE-BORE MORTAR

• US 3,613,596 A
• Filed: 04/30/1969
• Issued: 10/19/1971
• Est. Priority Date: 03/04/1969
• Status: Expired due to Term

• Current Assignee: Erik Walde
• Original Assignee: Erik Walde
• Inventors: Walde, Erik
• Primary Examiner(s): Stahl, Robert F.
• Application Number:
  US04/820,567
• Time in Patent Office: 902 Days
• Field of Search: 102/93,94,49.1,49.2
• US Class Current: 102/525
• CPC Class Codes: A61K 31/00 Medicinal preparations containing organic active ingredients
• CPC Class Codes: C03B 18/06 using mechanical means, e.g. restrictor bars, edge rollers
• CPC Class Codes: C07D 213/71 to which a second hetero atom is attached
• CPC Class Codes: F41F 1/06 Mortars base plates therefor F41A23/54
• CPC Class Codes: F42B 14/02 Driving bands; Rotating bands F42B14/04 takes precedence

Abstract

A projectile for a muzzle loading rifle-bore mortar, with the projectile having an annular, circumferential groove provided with a rifled surface; an angularly split ring is located in the groove and is of less width than the groove so that the ring can move within the groove. The ring has resiliency sufficient to permit it to expand to a diameter similar to the diameter of a rearward nonrifled area of the mortar barrel and the said nonrifled part of the barrel has a diameter similar to that of the bases of the rifling. The depth of the groove increases steadily from the rearmost to the foremost of its flank surfaces.

Claims

1. A projectile for a muzzle loading mortar with a bore having a forward rifled portion and a rearward chamber comprising, in combination a rigid body;

said rigid body having a circumferential groove formed therein and comprising a front end, a rear end in fixed spaced relation to said front end, and generally conical surface means between said ends and tapering inwardly in a direction toward a front portion of the body;

deformable drive band means in said groove and extending around said conical surface means, said drive band means having a width substantially less than the width of said groove as measured between said front and rear ends, said drive band means being movable along said conical surface means to a first position adjacent said front end and in which said band is contracted and has a diameter smaller than the diameter of the rifled portion of said bore, and to a second position in seating engagement with said rear end and in which said band is expanded by said conical surface means to a diameter greater than the rifled portion of the bore;

said band being movable to said second position in response to inertia of the projectile when it is fired;

whereby, said projectile can be dropped through said rifled portion of the bore and into said chamber with said band in said first position; and

said band expands to engage said rifled portion, when the projectile is fired, upon movement to said second position.

2. A projectile according to claim 1 wherein said drive band means comprises a ring of resilient material transversely split at an angle to the longitudinal axis of the projectile.

3. A projectile according to claim 2 wherein said ring has a uniform cross-sectional configuration.

4. A projectile according to claim 2 wherein the bottom of the groove has rifling extending in a direction along the longitudinal axis of the projectile;

and said conical surface means is the exterior surface of the rifling in the groove.

5. A projectile according to claim 4 wherein the depth of the rifling in said groove decreases in a direction toward the front end of said groove.