US5070829A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Primer bulb retainer for carburetor
Assignee: Briggs and Stratton Corp
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Filing: 1990-09-28
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Granted: 1991-12-10
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Expires: 2010-09-28
Abstract
Abstract The present invention discloses an engine primer bulb assembly having a base, a primer bulb and a retaining ring for securing the primer bulb to the base. The retaining ring is self-locking and provides a circumferential force against the bulb to seal it with the base to provide a primer chamber.
Inventors
- 👤 Thomas G. Guntly
- 👤 Richard T. Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:11
CPC Classifications
F; F02; F02M; F02M1/00; F02M1/16; Y; Y10; Y10S; Y10S261/00; Y10S261/08
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
169 words
A primer assembly for an internal combustion engine for introducing an amount of fuel into an intake system prior to starting the engine, comprising: a) a primer bulb comprised of a resilient material and including an enlarged annular outer rim; b) a base for receiving the annular rim of said primer bulb; and c) a retaining ring adapted to be received by and secured to the base for engaging and sealing the rim of the primer bulb to the base for defining a primer chamber between the base and the primer bulb, said base includes a pair of concentric annular walls defining a channel therebetween, wherein the annular rim of the primer bulb is adapted to fit over the interior annular wall and into the channel, and wherein the retaining ring includes an annular outer end dimensioned to fit around the bulb and between the rim and the outer annular wall of the base, for urging the rim of the primer bulb into engagement with the inner annular wall.
Claim 2
Dependent Claim
169 words
A primer assembly for an internal combustion engine for introducing an amount of fuel into an intake system prior to starting the engine, comprising: a) a primer bulb comprised of a resilient material and including an enlarged annular outer rim; b) a base for receiving the annular rim of said primer bulb; and c) a retaining ring adapted to be received by and secured to the base for engaging and sealing the rim of the primer bulb to the base for defining a primer chamber between the base and the primer bulb, said base includes a pair of concentric annular walls defining a channel therebetween, wherein the annular rim of the primer bulb is adapted to fit over the interior annular wall and into the channel, and wherein the retaining ring includes an annular outer end dimensioned to fit around the bulb and between the rim and the outer annular wall of the base, for urging the rim of the primer bulb into engagement with the inner annular wall.
Claim 3
Dependent Claim
22 words
The primer assembly of claim 1, wherein the retaining ring includes an integral self-locking means for securing the ring to the base.
Claim 4
Dependent Claim
54 words
The primer assembly of claim 1, the outer annular wall of the base including a pair of slots and the retaining ring including a pair of resilient tabs for defining detents which are received by the slots when the ring, bulb and base are fully assembled, thereby mechanically locking the assembly in assembled relationship.
Claim 5
Dependent Claim
42 words
The primer assembly of claim 3, the sealing ring further including a circumferential ridge spaced inwardly from the outer end of the ring and extending radially inward from the outer wall to provide a retainer against the rim of the primer bulb.
Claim 6
Dependent Claim
31 words
The primer assembly of claim 3 wherein said resilient tabs each include a tool-engaging portion selectively engageable by a tool for moving said tabs from their locked to their unlocked positions.
Claim 7
Dependent Claim
33 words
The primer assembly of claim 5 wherein said tool-engaging portion comprises a shoulder formed in said tabs and located adjacent said slots when the ring, bulb and base are in said assembled relationship.
Claim 8
Dependent Claim
109 words
A primer assembly for an internal combustion engine for introducing an amount of fuel into an intake system prior to starting the engine, comprising: a) a primer bulb comprised of a resilient material and including an enlarged annular outer rim; b) a base for receiving the annular rim of said primer bulb; c) a retaining ring adapted to be received by and secured to the base for engaging and sealing the rim of the primer bulb to the base for defining a primer chamber between the base and the primer bulb; and d) snap-lock mans cooperable between said ring and said base for securing the ring to the base.
Claim 9
Dependent Claim
109 words
A primer assembly for an internal combustion engine for introducing an amount of fuel into an intake system prior to starting the engine, comprising: a) a primer bulb comprised of a resilient material and including an enlarged annular outer rim; b) a base for receiving the annular rim of said primer bulb; c) a retaining ring adapted to be received by and secured to the base for engaging and sealing the rim of the primer bulb to the base for defining a primer chamber between the base and the primer bulb; and d) snap-lock mans cooperable between said ring and said base for securing the ring to the base.
Claim 10
Dependent Claim
39 words
The primer assembly of claim 7 wherein said snap-lock means includes at least one resilient tab on one of said base and ring and an abutment on the other of said base and right for engagement with said tab.
Claim 11
Dependent Claim
84 words
The primer assembly of claim 7, wherein the base includes a pair of concentric annular walls defining a channel therebetween, wherein the annular rim of the primer bulb is adapted to fit over the interior annular wall and into the channel, and wherein the retaining ring includes an annular outer end dimensioned to fit around the bulb and between the rim and the outer annular wall of the base, for urging the rim of the primer bulb into engagement with the inner annular wall.
Claim 12
Dependent Claim
61 words
The primer assembly of claim 9, wherein said snap-lock means includes a pair of slots formed in the outer annular wall of the base and a pair of resilient tabs formed in the retaining ring for defining detents which are received by the slots when the ring, bulb and base are fully assembled, thereby mechanically locking the assembly in assembled relationship.
Claim 13
Dependent Claim
42 words
The primer assembly of claim 10, the sealing ring further including a circumferential ridge spaced inwardly from the outer end of the ring and extending radially inward from the outer wall to provide a retainer against the rim of the primer bulb.
Claim 14
Dependent Claim
31 words
The primer assembly of claim 10 wherein said resilient tabs each include a tool-engaging portion selectively engageable by a tool for moving said tabs from their locked to their unlocked positions.
Claim 15
Dependent Claim
33 words
The primer assembly of claim 12 wherein said tool-engaging portion comprises a shoulder formed in said tabs and located adjacent said slots when the ring, bulb and base are in said assembled relationship.
References Cited (Backward Citations)
US4197825A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-12-09 | 1995-06-10 | 1995-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-12-09 | 1999-06-10 | 1999-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-12-09 | 2003-06-10 | 2003-12-10 | $7700.00 | Window Closed / Lapsed |