Patent US1093112A successfully refreshed from Google Patents.
US3803988A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diesel fuel primer pump
Assignee: OVICO
•
Filing: 1973-04-30
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Granted: 1974-04-16
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Expires: 1993-04-30
Abstract
Abstract A diesel fuel primer pump includes a piston assembly and cylinder having a filter media for air exhausted from the cylinder and biasing means between the actuating handle for the piston and the cylinder to resist vibration of the primer pump when it is not in operation.
Inventors
- 👤 T Orr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:19
CPC Classifications
F; F04; F04B; F04B9/00; F04B9/14; F04B53/00; F04B53/10; F04B53/1037; F16; F16J; F16J15/00; F16J15/16; F16J15/18; F02; F02B; F02B3/00; F02B3/06
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
149 words
A diesel fuel primer pump comprising a cylinder having a reciprocable piston assembly within the bore of the cylinder, means on one end of the cylinder for mounting the pump and including an inlet and outlet for fuel, the piston assembly including a piston having means for opening and closing the inlet and outlet and a piston rod attached to the piston, a closure secured to the other end of the cylinder, the piston rod extending through the closure and having a handle on the extending end, filter media on the piston rod within the closure, a gland secured to the closure to compress the media, means for locking the piston rod to the gland comprising a pin in the piston rod and engageable with the gland and biasing means between the handle and the pin for retaining the piston rod in locked position under vibration of the pump.
Claim 2
Dependent Claim
149 words
A diesel fuel primer pump comprising a cylinder having a reciprocable piston assembly within the bore of the cylinder, means on one end of the cylinder for mounting the pump and including an inlet and outlet for fuel, the piston assembly including a piston having means for opening and closing the inlet and outlet and a piston rod attached to the piston, a closure secured to the other end of the cylinder, the piston rod extending through the closure and having a handle on the extending end, filter media on the piston rod within the closure, a gland secured to the closure to compress the media, means for locking the piston rod to the gland comprising a pin in the piston rod and engageable with the gland and biasing means between the handle and the pin for retaining the piston rod in locked position under vibration of the pump.
Claim 3
Dependent Claim
68 words
A diesel fuel primer pump as set forth iN claim 1 wherein the filter media comprise a pair of porous metallic rings mounted on the piston rod and separated from each other by a non-metallic sealing ring, the diameter of the filter rings being greater than the diameter of the sealing ring to permit air exhausted from the pump cylinder to pass through the filter media to atmosphere.
Claim 4
Dependent Claim
19 words
A diesel fuel primer pump as set forth in claim 1 wherein the biasing means comprises a coil spring.
Claim 5
Dependent Claim
46 words
A diesel fuel primer pump as set forth in claim 1 wherein the end of the cylinder opposite the mounting end is of greater diameter than the extend of the bore of the cylinder to permit the piston to be assembled in the cylinder without damage.
Claim 6
Dependent Claim
79 words
In a diesel fuel primer pump comprising a cylinder and a piston assembly which is reciprocable within the cylinder, the improvement in means for exhausting air from the cylinder above the piston comprising filter media including a pair of porous metallic filter rings separated by a non-metallic sealing ring mounted on a piston rod, the diameter of the sealing ring being smaller than the diameter of the filter rings to permit air to pass from the cylinder to atmosphere.
Claim 7
Dependent Claim
79 words
In a diesel fuel primer pump comprising a cylinder and a piston assembly which is reciprocable within the cylinder, the improvement in means for exhausting air from the cylinder above the piston comprising filter media including a pair of porous metallic filter rings separated by a non-metallic sealing ring mounted on a piston rod, the diameter of the sealing ring being smaller than the diameter of the filter rings to permit air to pass from the cylinder to atmosphere.
Claim 8
Dependent Claim
48 words
A diesel fuel primer pump as set forth in claim 5 and including the improvement in means for resisting vibration of the pump comprising biasing means disposed on the piston rod between a locking pin for locking the handle in position and the handle for actuating the piston.
Claim 9
Dependent Claim
107 words
A diesel fuel primer pump comprising a cylinder having a reciprocable piston assembly within the bore of the cylinder, gland means threadably secured in the closure, a piston rod for actuating the piston extending through the closure and through the gland, filter media disposed on the piston rod within the closure and adapted to be compressed within the closure by the gland, said filter media comprising a pair of porous sintered filter rings separated by a non-metallic sealing ring, said filter media permitting air from the cylinder above the piston to be exhausted through the filter media to atmosphere upon the return stroke of the piston assembly.
Claim 10
Dependent Claim
107 words
A diesel fuel primer pump comprising a cylinder having a reciprocable piston assembly within the bore of the cylinder, gland means threadably secured in the closure, a piston rod for actuating the piston extending through the closure and through the gland, filter media disposed on the piston rod within the closure and adapted to be compressed within the closure by the gland, said filter media comprising a pair of porous sintered filter rings separated by a non-metallic sealing ring, said filter media permitting air from the cylinder above the piston to be exhausted through the filter media to atmosphere upon the return stroke of the piston assembly.
Claim 11
Dependent Claim
103 words
A diesel fuel primer pump comprising a cylinder having a piston assembly reciprocable therein, one end of said cylinder being closed and including a locking mechanism, said locking mechanism comprising a gland having an internal recess, a pin extending through the piston rod and adapted to enter said recess in the gland and to be rotated therein, a handle on the piston rod for rotating it within the gland, and a coil spring between the pin and the handle for biasing the gland and handle to force the pin against the recess to retain the locking mechanism against vibration of the primer pump.
Claim 12
Dependent Claim
103 words
A diesel fuel primer pump comprising a cylinder having a piston assembly reciprocable therein, one end of said cylinder being closed and including a locking mechanism, said locking mechanism comprising a gland having an internal recess, a pin extending through the piston rod and adapted to enter said recess in the gland and to be rotated therein, a handle on the piston rod for rotating it within the gland, and a coil spring between the pin and the handle for biasing the gland and handle to force the pin against the recess to retain the locking mechanism against vibration of the primer pump.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-04-15 | 1977-10-15 | 1978-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-15 | 1981-10-15 | 1982-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-15 | 1985-10-15 | 1986-04-16 | $7700.00 | Window Closed / Lapsed |