US4108104A
Expired / Lapsed
US
⏱️ 0.0 years remaining
One piece plastic molded structural unit and door knocker constructed therefrom
Assignee: Rb Toy Development Co
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Filing: 1977-06-29
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Granted: 1978-08-22
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Expires: 1997-06-29
Abstract
Abstract A one piece molded synthetic organic resin structure including a base and an arm connected thereto at spaced apart points by thin struts easily severed to separate the arm from the base. Connection means are provided on the arm and the base so that one end of the arm can be fixedly connected to the base leaving a free end of the arm overlying a portion of the base, the free end normally being urged against and in contact with the base. The arm is sufficiently flexible to permit the free end to be bent away from the base without breaking the arm, the release of the arm resulting in a snap movement thereof against the base causing a loud noise.
Inventors
- 👤 Sam Kupperman
- 👤 Dennis Kupperman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:56
CPC Classifications
G; G10; G10K; G10K3/00; Y; Y10; Y10S; Y10S116/00; Y10S116/12; Y10S425/00; Y10S425/806
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
258 words
An integrally connected one piece molded synthetic organic resin structure, for easy assembly into a door knocker capable of producing a predetermined audible sound, comprising a synthetic organic resin base having at least a portion of the rear surface thereof flat, a synthetic organic resin arm connected to said base at spaced apart points by at least two relatively thin struts, each of the struts being easily severed to separate said arm from said base, at least one boss receiving means on one of said arm and the front surface of said base and integral therewith, at least one boss on the other of said arm and the front surface of said base and integral therewith extending therefrom sized to snap fit within said boss receiving means and to be frictionally engaged and maintained thereby, said arm having a size such that when said boss and said boss receiving means are frictionally engaged said arm has a free end thereof overlying a portion of said base which is normally urged toward said base, said arm being flexible to permit the free end thereof when said boss is frictionally engaged and maintained by said boss receiving means to be bent away from said base without breaking said arm, said boss and boss receiving means cooperating with said arm thus mounted on said base to cause said arm to snap back toward and against said base upon release of said arm from the bent away position thereof, thereby striking said base with a predetermined force to make an audible sound.
Claim 2
Dependent Claim
258 words
An integrally connected one piece molded synthetic organic resin structure, for easy assembly into a door knocker capable of producing a predetermined audible sound, comprising a synthetic organic resin base having at least a portion of the rear surface thereof flat, a synthetic organic resin arm connected to said base at spaced apart points by at least two relatively thin struts, each of the struts being easily severed to separate said arm from said base, at least one boss receiving means on one of said arm and the front surface of said base and integral therewith, at least one boss on the other of said arm and the front surface of said base and integral therewith extending therefrom sized to snap fit within said boss receiving means and to be frictionally engaged and maintained thereby, said arm having a size such that when said boss and said boss receiving means are frictionally engaged said arm has a free end thereof overlying a portion of said base which is normally urged toward said base, said arm being flexible to permit the free end thereof when said boss is frictionally engaged and maintained by said boss receiving means to be bent away from said base without breaking said arm, said boss and boss receiving means cooperating with said arm thus mounted on said base to cause said arm to snap back toward and against said base upon release of said arm from the bent away position thereof, thereby striking said base with a predetermined force to make an audible sound.
Claim 3
Dependent Claim
30 words
The one piece structure set forth in claim 1, wherein said boss receiving means extends outwardly from said base and said boss extends from said arm in the same direction.
Claim 4
Dependent Claim
26 words
The one piece structure set forth in claim 2, wherein said arm has a tab thereon extending away therefrom in a direction opposite to said boss.
Claim 5
Dependent Claim
23 words
The one piece structure set forth in claim 3, wherein said arm has a protuberance thereon opposite said tab and extending away therefrom.
Claim 6
Dependent Claim
35 words
The one piece structure set forth in claim 1, wherein said arm is arcuate having two legs interconnected by a bight, the base being positioned between said legs and connected thereto and to said bight.
Claim 7
Dependent Claim
21 words
The one piece structure set forth in claim 1, wherein said base has on the front surface thereof indicia receiving means.
Claim 8
Dependent Claim
29 words
The one piece structure set forth in claim 1, and further comprising means on said flat rear surface of said base for adhering said base to a preselected substrate.
Claim 9
Dependent Claim
21 words
The one piece structure set forth in claim 1, wherein the synthetic organic resin is a rigid polyolefin or rigid polystyrene.
Claim 10
Dependent Claim
21 words
The one piece structure set forth in claim 1, wherein said arm has spaced apart ribs extending the entire length thereof.
Claim 11
Dependent Claim
146 words
An all plastic material door knocker comprising a base having at least a portion of the rear surface thereof flat, an arm a boss and boss receiving means sized frictionally to engage and maintain said boss in said boss receiving means in a snap fit connecting said arm to the front surface of said base to provide a free end of said arm overlying a portion of said base which is normally urged toward said base, said arm being flexible to permit the free end thereof to be bent away from said base without breaking said arm, said base, said boss and boss receiving means cooperating with said arm to cause said arm to snap back toward and against said base upon release of said arm from the bent away position thereof, thereby to strike said base with a predetermined force to make an audible sound.
Claim 12
Dependent Claim
146 words
An all plastic material door knocker comprising a base having at least a portion of the rear surface thereof flat, an arm a boss and boss receiving means sized frictionally to engage and maintain said boss in said boss receiving means in a snap fit connecting said arm to the front surface of said base to provide a free end of said arm overlying a portion of said base which is normally urged toward said base, said arm being flexible to permit the free end thereof to be bent away from said base without breaking said arm, said base, said boss and boss receiving means cooperating with said arm to cause said arm to snap back toward and against said base upon release of said arm from the bent away position thereof, thereby to strike said base with a predetermined force to make an audible sound.
Claim 13
Dependent Claim
19 words
The door knocker set forth in claim 10, wherein said boss is a cylinder extending outwardly of said arm.
Claim 14
Dependent Claim
24 words
The door knocker set forth in claim 11, wherein said arm is U-shaped having a cylindrical boss at each end thereof extending outwardly therefrom.
Claim 15
Dependent Claim
56 words
The door knocker set forth in claim 12, and further comprising a protuberance on said arm intermediate said bosses extending outwardly of said arm to the same extent as said boss receiving means extends from said base, thereby to ensure contact between said protuberance and said boss when said arm is in the normal position thereof.
Claim 16
Dependent Claim
50 words
The door knocker set forth in claim 10, wherein said arm has a tab centrally thereof extending outwardly therefrom in a direction opposite to said boss, said tab extending below the bottom edge of said base to facilitate movement by the user of said arm from the normal position thereof.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-08-21 | 1982-02-20 | 1982-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-08-21 | 1986-02-20 | 1986-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-08-21 | 1990-02-20 | 1990-08-22 | $7700.00 | Window Closed / Lapsed |