US3880389A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Riflescope mount
Assignee: Burris Co Inc
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Filing: 1973-07-09
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Granted: 1975-04-29
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Expires: 1993-07-09
Abstract
Abstract This invention relates to an improved riflescope mount, and, more specifically, to the novel detachable connection between the front ring and base. The ring has the underside thereof provided with a downwardly tapered frusto-conical self-centering post terminating at its apex in a short cylindrical section having springable tangs projecting both forwardly and rearwardly therefrom to define a clip. The base, in turn, has a complementary, though relatively shallower, frusto-conical seat adapted to mate with the post and an oversize transversely extending slot intersecting said seat sized to loosely receive the clip when aligned therewith. The clip and underside of the base bordering the slot therein are so shaped and dimensioned that upon rotation of the ring through an angle of 90*, the tangs will spring down enough to pass into position underneath the dimples produced by the seat thereabove while drawing the post snugly down atop the latter.
Inventors
- 👤 Donald J Burris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:50
CPC Classifications
F; F41; F41G; F41G11/00; F41G11/001; F41G11/005; F41G11/006
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
236 words
Apparatus for detachably fastening the front end of a riflescope to a rifle so as to permit limited relative pivotal movement of the former relative to the latter which comprises: a rigid base fixedly attachable to the rifle having a downwardly and inwardly tapered seat-forming frusto-conical depression in the top surface thereof, a socket in the underside thereof opposite said depression in the top terminating at its upper end in a roof-forming surface, and an elongate essentially diametrical slot intersecting said depression establishing communication between the latter and the socket therebeneath; ring means having a post depending from the underside thereof terminating at its lower end in a downwardly and inwardly tapered frusto-conical tip section complementary to the seat-forming depression in the base; and, latch-forming means shaped to enter the slot in the base when aligned therewith operative upon limited relative rotation between said base and ring to releasably lock same together in assembled relation, said means comprising a clip attached to the truncated apex of the tip section having a pair of springable tangs projecting in opposite directions from said point of attachment, said tangs being spaced beneath the frusto-conical section thereabove a distance such that they will seat against the roof-forming surface when rotated into face-to-face contacting relation therewith, and said tangs and roof-forming surface cooperating with one another in assembled relation to continually bias said opposed frustoconical surfaces into tight slidable mated engagement.
Claim 2
Dependent Claim
236 words
Apparatus for detachably fastening the front end of a riflescope to a rifle so as to permit limited relative pivotal movement of the former relative to the latter which comprises: a rigid base fixedly attachable to the rifle having a downwardly and inwardly tapered seat-forming frusto-conical depression in the top surface thereof, a socket in the underside thereof opposite said depression in the top terminating at its upper end in a roof-forming surface, and an elongate essentially diametrical slot intersecting said depression establishing communication between the latter and the socket therebeneath; ring means having a post depending from the underside thereof terminating at its lower end in a downwardly and inwardly tapered frusto-conical tip section complementary to the seat-forming depression in the base; and, latch-forming means shaped to enter the slot in the base when aligned therewith operative upon limited relative rotation between said base and ring to releasably lock same together in assembled relation, said means comprising a clip attached to the truncated apex of the tip section having a pair of springable tangs projecting in opposite directions from said point of attachment, said tangs being spaced beneath the frusto-conical section thereabove a distance such that they will seat against the roof-forming surface when rotated into face-to-face contacting relation therewith, and said tangs and roof-forming surface cooperating with one another in assembled relation to continually bias said opposed frustoconical surfaces into tight slidable mated engagement.
Claim 3
Dependent Claim
30 words
The apparatus as set forth in claim 1 in which: the roof-forming surface at the top of the socket is essentially planar and perpendicular to the axis of ring rotation.
Claim 4
Dependent Claim
33 words
The apparatus as set forth in claim 1 in which: the frusto-conical tip section of the post is a right conical section having its axis passing through the center of the ring means.
Claim 5
Dependent Claim
48 words
The apparatus as set forth in claim 1 in which: the complementary frusto-conical surfaces are both right conical sections; and, in which the tangs and roof-forming surface cooperate with one another in assembled relation to maintain a coaxial relationship between the respective axes of said complementary frusto-conical surfaces.
Claim 6
Dependent Claim
49 words
The apparatus as set forth in claim 1 in which: the frusto-conical tip section is larger at its base than the complementary frusto-conical seat-forming surface so as to extend above the latter when in assembled relation and define a stop effective to keep the post from contacting the base.
Claim 7
Dependent Claim
29 words
The apparatus as set forth in claim 1 in which: the upper base engaging surface of the tangs is essentially planar and normal to the axis of ring rotation.
Claim 8
Dependent Claim
50 words
The apparatus as set forth in claim 1 in which: downwardly facing shoulders define the margin separating the frusto-conical tip section from the post thereabove; and, in which the mated frusto-conical surfaces cooperate with one another in assembled relation to hold said shoulders spaced above the top of the base.
Claim 9
Dependent Claim
60 words
The apparatus as set forth in claim 1 in which: cam-forming means are provided on those opposed surfaces of the tangs or base bordering the slot therein that first engage one another upon rotational movement of the ring means from its released into its locked position, said cam-forming means being effective to deflect said tangs over onto the planar surface.
Claim 10
Dependent Claim
20 words
The apparatus as set forth in claim 8 in which: the cam-forming means comprise beveled leading edges in the tangs.
Claim 11
Dependent Claim
32 words
The apparatus as set forth in claim 8 in which: the cam-forming means comprise oppositely-inclined areas separating the roof-forming surface at the top of the socket from the margins of the slot.
Claim 12
Dependent Claim
159 words
The front riflescope mounting subassembly for use with a base having a downwardly and inwardly tapered seat-forming frusto-conical depression in its top surface, a socket in the underside thereof opposite said depression in the top terminating at its upper end in a roof-forming surface, and an elongate essentially diametrical slot intersecting said depression communicating the latter with the socket therebeneath which comprises: ring means having a post depending from the underside thereof terminating at its lower end in a downwardly and inwardly tapered frusto-conical tip section complementary to the seat-forming depression in the base, and an elongate clip sized to pass through the slot in the base depending from the apex of the truncated tip section, said clip defining a latch member effective to hold said ring means in assembled relation atop the base when inserted through the slot in the latter and rotated relative thereto into a position underlying the roof-forming portion at the top of the socket.
Claim 13
Dependent Claim
159 words
The front riflescope mounting subassembly for use with a base having a downwardly and inwardly tapered seat-forming frusto-conical depression in its top surface, a socket in the underside thereof opposite said depression in the top terminating at its upper end in a roof-forming surface, and an elongate essentially diametrical slot intersecting said depression communicating the latter with the socket therebeneath which comprises: ring means having a post depending from the underside thereof terminating at its lower end in a downwardly and inwardly tapered frusto-conical tip section complementary to the seat-forming depression in the base, and an elongate clip sized to pass through the slot in the base depending from the apex of the truncated tip section, said clip defining a latch member effective to hold said ring means in assembled relation atop the base when inserted through the slot in the latter and rotated relative thereto into a position underlying the roof-forming portion at the top of the socket.
Claim 14
Dependent Claim
70 words
The subassembly as set forth in claim 11 in which: the clip includes a pair of springable tangs projecting in opposite directions from its point of attachment to the apex of the frusto-conical tip section, said tangs being operative in assembled relation to engage the roof-forming surface at the top of the socket and cooperate therewith to continually bias the complementary frusto-conical surfaces into mated slidable engagement with one another.
Claim 15
Dependent Claim
33 words
The subassembly as set forth in claim 11 in which: the frusto-conical tip section of the post is a right conical section having its axis passing through the center of the ring means.
Claim 16
Dependent Claim
49 words
The subassembly as set forth in claim 11 in which: the frusto-conical tip section is larger at its base than the complementary frusto-conical seat-forming surface so as to extend above the latter when in aSsembled relation and define a stop effective to keep the post from contacting the base.
Claim 17
Dependent Claim
28 words
The subassembly as set forth in claim 11 in which: the upper base-engaging surface of the tangs is essentially planar and normal to the axis of ring rotation.
Claim 18
Dependent Claim
127 words
The base for detachably connecting a riflescope mounting ring to a rifle which comprises: a rigid platform having the underside thereof shaped to conform with the rifle barrel atop which it is to be mounted, a frusto-conical seat-forming depression in the upper surface thereof shaped to mate with a complementary frusto-conical post tip on the underside of the ring, a socket in the underside directly beneath the frusto-conical depression, and an elongate slot extending diametrically across said depression communicating the latter with the socket therebeneath, said socket and slot cooperating to receive and releasably retain a transversely-extending latch member depending from the apex of the post upon insertion of the latter through the slot and relative rotation through an angle sufficient to establish a misaligned relation therebetween.
Claim 19
Dependent Claim
127 words
The base for detachably connecting a riflescope mounting ring to a rifle which comprises: a rigid platform having the underside thereof shaped to conform with the rifle barrel atop which it is to be mounted, a frusto-conical seat-forming depression in the upper surface thereof shaped to mate with a complementary frusto-conical post tip on the underside of the ring, a socket in the underside directly beneath the frusto-conical depression, and an elongate slot extending diametrically across said depression communicating the latter with the socket therebeneath, said socket and slot cooperating to receive and releasably retain a transversely-extending latch member depending from the apex of the post upon insertion of the latter through the slot and relative rotation through an angle sufficient to establish a misaligned relation therebetween.
Claim 20
Dependent Claim
18 words
The base as set forth in claim 16 in which: the frusto-conical depression is a right conical surface.
Claim 21
Dependent Claim
35 words
The base as set forth in claim 16 in which: the socket terminates at its upper end in a roof-forming surface that is essentially planar and normal to the axis of the frustoconical depression thereabove.
References Cited (Backward Citations)
US2187054A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-28 | 1978-10-28 | 1979-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-28 | 1982-10-28 | 1983-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-28 | 1986-10-28 | 1987-04-29 | $7700.00 | Window Closed / Lapsed |