US3815925A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stuffing box assembly
Assignee: Individual
•
Filing: 1972-12-12
•
Granted: 1974-06-11
•
Expires: 1992-12-12
Abstract
Abstract A stuffing box assembly includes tubular means surrounding a pump piston rod and including a pair of longitudinally spaced stuffing boxes. The tubular means is formed as a pair of longitudinal portions having mutually engaging curved surfaces to provide a pivotal connection therebetween. Each portion includes a respective one of the stuffing boxes, and one of the portions forms a chamber surrounding the rod to receive fluid leaking through one of the stuffing boxes, this one portion having a passage communicating the chamber with the exterior of the one portion to enable a suitable pressure responsive means to be connected thereto.
Inventors
- 👤 R Mattoon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:13
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/02; E21B33/03; E21B33/068; E21B33/072; Y; Y10; Y10T; Y10T137/00; Y10T137/1624; Y10T137/1632
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
97 words
A stuffing box assembly including a movable rod, tubular means surrounding the rod, said tubular means including a pair of stuffing boxes surround the rod and longitudinally spaced along the rod, the tubular means being formed in two longitudinal portions having mutually engaging curved surfaces providing a pivotal connection therebetween, each portion including a respective one of said stuffing boxes, and one of said portions forming a chamber surrounding the rod to receive fluid leaking through one of the stuffing boxes, said one portion having a passage communicating the chamber with the exterior of said one portion.
Claim 2
Dependent Claim
97 words
A stuffing box assembly including a movable rod, tubular means surrounding the rod, said tubular means including a pair of stuffing boxes surround the rod and longitudinally spaced along the rod, the tubular means being formed in two longitudinal portions having mutually engaging curved surfaces providing a pivotal connection therebetween, each portion including a respective one of said stuffing boxes, and one of said portions forming a chamber surrounding the rod to receive fluid leaking through one of the stuffing boxes, said one portion having a passage communicating the chamber with the exterior of said one portion.
Claim 3
Dependent Claim
116 words
A stuffing box according to claim 1 wherein the other of said portions includes a tube containing a stuffing packing forming part of the stuffing box associated with said other portion, a packing gland engaging the stuffing packing at one end of said gland, said packing gland having a curved surface at its opposite end, said one portion terminating in an end member with a complementary curved surface engaging the curved surface of the packing gland to form the pivotal connection, and including a packing nut screwed onto the tube and engaging the end member to retain the end member in engagement with the packing gland and to urge the packing gland against the stuffing packing.
Claim 4
Dependent Claim
41 words
A stuffing box assembly according to claim 2 wherein the packing gland has an outwardly concave surface at its opposite end, the end member is ball-shaped, and the packing nut has a concavely curved inner surface engaging the ball-shaped end member.
Claim 5
Dependent Claim
16 words
A stuffing box assembly according to claim 1 including a pressure switch connected to said passage.
Claim 6
Dependent Claim
16 words
A stuffing box assembly according to claim 1 including a pressure gauge connected to said passage.
Claim 7
Dependent Claim
33 words
A pump assembly including a pump having a reciprocable drive rod, and a stuffing box assembly as claimed in claim 1, said reciprocable rod constituting said movable rod of said stuffing box assembly.
Claim 8
Dependent Claim
109 words
A stuffing box assembly according to claim 1 wherein the other of said portions includes a tube containing a stuffing packing forming part of the stuffing box associated with said other portion, a packing gland engaging said packing, a first nut screwed onto said tube to urge said gland against said packing, said nut having a curved end surface engaged by a complementary curved surface on said one portion to form said pivotal connection, and a second nut screwed onto said first nut and engaging said one portion to retain said complementary curved surface on said one portion in engagement with said curved end surface on said first nut.
Claim 9
Dependent Claim
46 words
A stuffing box assembly according to claim 1 wherein said chamber contains a ball valve resiliently urged against said rod, and said chamber terminates at a valve seat surrounding the rod against which said valve mamber is forced if said rod breaks and vacates the chamber.
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) | 1977-06-10 | 1977-12-10 | 1978-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-10 | 1981-12-10 | 1982-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-10 | 1985-12-10 | 1986-06-11 | $7700.00 | Window Closed / Lapsed |