US3731590A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improvements in reciprocating slide type handgun automatic firearms
Assignee: Individual
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Filing: 1970-10-05
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Granted: 1973-05-08
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Expires: 1990-10-05
Abstract
Abstract A reciprocating slide type handgun automatic firearm is disclosed comprising a slide, a recoil mechanism comprising front and rear spring guides and recoil compression spring means operative therebetween, and take-up means holding said spring guides slidable in respect to each other so that all parts of said recoil mechanism are held together as a subassembly without loose parts, said slide having means for holding the front end of said recoil mechanism, an internal radial slot formed in said slide on opposite sides of the vertical axis thereof, said slot being open at opposite ends thereof, a barrel bushing having spaced apart protuberant lock means thereon disposed in said slot, said barrel bushing rotatable in respect to said slide to facilitate assembly of said recoil mechanism in said firearm, said protuberant lock means holding said barrel bushing axially fast in the front end of said slide, said barrel bushing having means thereon for pushing upon the front end of said recoil mechanism during recoil of said firearm.
Inventors
- 👤 J Zimmerman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:12
CPC Classifications
F; F41; F41A; F41A25/00; F41A25/22; F41A5/00; F41A5/02; F41A5/04
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
165 words
A reciprocating slide type handgun automatic firearm having a slide, a recoil mechanism comprising front and rear spring guides and recoil compression spring means operative therebetween, and take-up means holding said spring guides slidable in respect to each other and so that all parts of said recoil mechanism are held together as a subassembly without loose parts, said slide having means for holding the front end of said recoil mechanism, an internal radial slot formed in said slide on opposite sides of the vertical axis thereof, said slot being open at opposite ends thereof, a barrel bushing having spaced apart protuberant lock means thereon disposed in said slot, said barrel bushing rotatable in respect to said slide to facilitate assembly of said recoil mechanism in said firearm, said protuberant lock means holding said barrel bushing axially fast in the front end of said slide, said barrel bushing having means thereon for pushing upon the front end of said recoil mechanism during recoil of said firearm.
Claim 2
Dependent Claim
165 words
A reciprocating slide type handgun automatic firearm having a slide, a recoil mechanism comprising front and rear spring guides and recoil compression spring means operative therebetween, and take-up means holding said spring guides slidable in respect to each other and so that all parts of said recoil mechanism are held together as a subassembly without loose parts, said slide having means for holding the front end of said recoil mechanism, an internal radial slot formed in said slide on opposite sides of the vertical axis thereof, said slot being open at opposite ends thereof, a barrel bushing having spaced apart protuberant lock means thereon disposed in said slot, said barrel bushing rotatable in respect to said slide to facilitate assembly of said recoil mechanism in said firearm, said protuberant lock means holding said barrel bushing axially fast in the front end of said slide, said barrel bushing having means thereon for pushing upon the front end of said recoil mechanism during recoil of said firearm.
Claim 3
Dependent Claim
55 words
A reciprocating slide type handgun automatic firearm as claimed in claim 1, said barrel bushing having a front plate portion which accomplishes said pushing and an integral cylindrical body portion projecting rearwardly from said plate portion, said lock means diametrically spaced from each other and upstanding from the outside cylindrical surface of said body portion.
Claim 4
Dependent Claim
139 words
A reciprocating slide type handgun automatic firearm as claimed in claim 2, said opposite ends of said slot being spaced apart, said slide having an access notch in the upper end thereof, said access notch extending axially inwardly from the front end of said slide and opening to said slot, said barrel bushing insertable in the front end of said slide in one rotated position in respect thereto in which one of said lock means is disposed in said access notch and the other of said lock means is disposed between said opposite ends of said slot, said barrel bushing rotatable in respect to said slide from said one position to another rotated position in which both of said lock means are disposed in said slot, whereby to hold said barrel bushing axially fast in respect to said slide.
Claim 5
Dependent Claim
131 words
A reciprocating slide type handgun automatic firearm having a slide, an internal radial slot formed in said slide on opposite sides of the vertical axis thereof, said slot being open at opposite ends thereof, said slide having an access notch in the upper end thereof, a barrel bushing having spaced apart protuberant lock means thereon disposed in said slot and holding said barrel bushing axially fast in the front end of said slide and so that said barrel bushing is rotatable in respect to said slide, one of said lock means being circumferentially wider than said other lock means, said wider lock means being disposed between said opposite ends of said slot and said other lock means being disposed in said access notch in one rotated position of said barrel bushing.
Claim 6
Dependent Claim
131 words
A reciprocating slide type handgun automatic firearm having a slide, an internal radial slot formed in said slide on opposite sides of the vertical axis thereof, said slot being open at opposite ends thereof, said slide having an access notch in the upper end thereof, a barrel bushing having spaced apart protuberant lock means thereon disposed in said slot and holding said barrel bushing axially fast in the front end of said slide and so that said barrel bushing is rotatable in respect to said slide, one of said lock means being circumferentially wider than said other lock means, said wider lock means being disposed between said opposite ends of said slot and said other lock means being disposed in said access notch in one rotated position of said barrel bushing.
Claim 7
Dependent Claim
142 words
In a reciprocating slide type handgun automatic firearm a recoil mechanism comprising front and rear spring guides and a compression recoil spring disposed about said front and rear spring guides and yieldably pushing said spring guides away from each other, take-up means holding said spring guides slidable in respect to each other, said take-up means including yieldable means yieldably urging said spring guides toward each other in opposition to said recoil spring, said front and rear spring guides and the part of said take-up means betWeen adjacent ends of said spring guides extending over the full length of said recoil spring in its expanded condition, and means at opposite ends of said spring guides for holding opposite end coils of said recoil spring so that all parts of said recoil mechanism are held and maintained together as a subassembly without loose parts.
Claim 8
Dependent Claim
142 words
In a reciprocating slide type handgun automatic firearm a recoil mechanism comprising front and rear spring guides and a compression recoil spring disposed about said front and rear spring guides and yieldably pushing said spring guides away from each other, take-up means holding said spring guides slidable in respect to each other, said take-up means including yieldable means yieldably urging said spring guides toward each other in opposition to said recoil spring, said front and rear spring guides and the part of said take-up means betWeen adjacent ends of said spring guides extending over the full length of said recoil spring in its expanded condition, and means at opposite ends of said spring guides for holding opposite end coils of said recoil spring so that all parts of said recoil mechanism are held and maintained together as a subassembly without loose parts.
Claim 9
Dependent Claim
64 words
In a reciprocating slide type handgun automatic firearm as claimed in claim 5, each of said spring guides being hollow cylindrical, and one having internal threads in opposite ends thereof, said take-up means including a take-up screw extending through the hollow interior of the other of said spring guides and threadably engaging the interior threads in an adjacent end of said one spring guide.
Claim 10
Dependent Claim
43 words
In a reciprocating slide type handgun automatic firearm as claimed in claim 5, said yieldable means including a take-up compression spring disposed about the shank of said take-up screw and operative upon said rear spring guide and the head of said take-up screw.
Claim 11
Dependent Claim
93 words
In a reciprocating slide type handgun automatic firearm as claimed in claim 5, front and rear plugs associated with said front and rear spring guides, respectively, each said plug constructed with a cavity for receiving an end coil of said recoil spring, said rear plug fast to said rear spring guide and said front plug slidable on said front spring guide, and means threadably engaged in the front end of said front spring guide serving as a stop for said front plug in the forward movement thereof during expansion of said recoil spring.
Claim 12
Dependent Claim
59 words
In a reciprocating slide type handgun automatic firearm having a slide and a barrel slidably carried in said slide, a recoil mechanism as claimed in claim 5 also carried in said slide, said recoil mechanism being held and maintained, together with said slide and said barrel, in a subassembly without loose parts to facilitate field stripping of said firearm.
Claim 13
Dependent Claim
103 words
A reciprocating slide type handgun automatic firearm as claimed in claim 1, and a barrel slidably carried in said slide, said recoil mechanism being held and maintained together with said slide and said barrel in a subassembly without loose parts to facilitate field stripping of said firearm, the lower end of said barrel bushing extending downwardly in front of the front end of said recoil mechanism when the axis of said barrel bushing is aligned with the axis of said slide, said lower end of said barrel bushing pushing upon the front end of said recoil mechanism during the recoil of said firearm.
Claim 14
Dependent Claim
185 words
In a reciprocating slide type handgun automatic firearm having a slide, a recoil mechanism held in said slide, a barrel bushing carried in said slide, a method of assembling said barrel bushing and said recoil mechanism in said slide comprising providing front and rear spring guides and recoil compression spring means operative therebetween, holding said spring guides slidable in respect to each other and so that all parts of said recoil mechanism are held together as a subassembly without loose parts, holding the front end of said recoil mechanism in said slide, forming an internal radial slot in said slide on opposite sides of the vertical axis thereof so that said slot is open at opposite ends thereof, forming spaced apart protuberant lock means on said barrel bushing, inserting said barrel bushing in the front of said slide so that said protuberant lock means are disposed in said slot, said barrel bushing rotatable in respect to said slide to facilitate assembly of said recoil mechanism in said firearm, said protuberant lock means holding said barrel bushing axially fast in the front end of said slide.
Claim 15
Dependent Claim
185 words
In a reciprocating slide type handgun automatic firearm having a slide, a recoil mechanism held in said slide, a barrel bushing carried in said slide, a method of assembling said barrel bushing and said recoil mechanism in said slide comprising providing front and rear spring guides and recoil compression spring means operative therebetween, holding said spring guides slidable in respect to each other and so that all parts of said recoil mechanism are held together as a subassembly without loose parts, holding the front end of said recoil mechanism in said slide, forming an internal radial slot in said slide on opposite sides of the vertical axis thereof so that said slot is open at opposite ends thereof, forming spaced apart protuberant lock means on said barrel bushing, inserting said barrel bushing in the front of said slide so that said protuberant lock means are disposed in said slot, said barrel bushing rotatable in respect to said slide to facilitate assembly of said recoil mechanism in said firearm, said protuberant lock means holding said barrel bushing axially fast in the front end of said slide.
Claim 16
Dependent Claim
127 words
In a reciprocating slide type handgun automatic firearm having a recoil spring, a method of guiding said recoil spring comprising forming front and rear spring guides, disposing a recoil spring about said spring guides so as to yieldably push said spring guides away from each other, providing take-up means to hold said spring guides slidable in respect to each other and to yieldably urge said spring guides toward each other in opposition to said recoil spring, extending said front and rear spring guides and the part of said take-up means between adjacent ends of said spring guides over the full length of said recoil spring in its expanded condition, whereby all parts of said recoil mechanism are held and maintained together as a subassembly without loose parts.
Claim 17
Dependent Claim
127 words
In a reciprocating slide type handgun automatic firearm having a recoil spring, a method of guiding said recoil spring comprising forming front and rear spring guides, disposing a recoil spring about said spring guides so as to yieldably push said spring guides away from each other, providing take-up means to hold said spring guides slidable in respect to each other and to yieldably urge said spring guides toward each other in opposition to said recoil spring, extending said front and rear spring guides and the part of said take-up means between adjacent ends of said spring guides over the full length of said recoil spring in its expanded condition, whereby all parts of said recoil mechanism are held and maintained together as a subassembly without loose parts.
Claim 18
Dependent Claim
144 words
In a reciprocating slide type handgun automatic firearm having a slide, a recoil mechanism held in said slide, a barrel bushing carried in said slide, a method of assembling said barrel bushing and said recoil mechanism in said slide as claimed in claim 12, said firearm having a barrel slidably carried in said slide, forming front and rear spring guides, disposing a recoil spring about said spring guides so as to yieldably push said spring guides away from each other, holding said spring guides slidable in respect to each other and yieldably urging said spring guides toward each other in opposition to said recoil spring, whereby all parts of said recoil mechanism are held and maintained together as a subassembly without loose parts, together with said slide and said barrel in a larger subassembly without loose parts, to facilitate field stripping of said firearm.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-07 | 1976-11-06 | 1977-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-07 | 1980-11-06 | 1981-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-07 | 1984-11-06 | 1985-05-08 | $7700.00 | Window Closed / Lapsed |