Patent US3799299A successfully refreshed from Google Patents.
US3799299A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Damping dashpot assembly
Assignee: AIRPOT CORP
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Filing: 1972-11-06
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Granted: 1974-03-26
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Expires: 1992-11-06
Abstract
Abstract A piston-connecting rod assembly for use in damping dash-pot cylinders. The connecting rod in the assembly has a fluid passage extending therethrough and a sleeve member mounted on the rod with a movable flap which overlies and covers the passage. The movement of the flap between open and closed positions is responsive to the fluid flow induced by the movement of the piston in the cylinder, the closed position corresponding to an operative damping position and the open position corresponding to an inoperative position. The sleeve aids in securing the piston to the connecting rod without any play therebetween.
Inventors
- 👤 A Cohen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:47
CPC Classifications
F; F16; F16F; F16F9/00; F16F9/32; F16F9/50; F16F9/34; F16F9/3415; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7879; Y10T137/7888; Y10T137/7891
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
172 words
A piston-connecting rod assembly for use in a damping dashpot cylinder with an aperture therethrough and valve means in said aperture for providing single direction fluid flow out of said cylinder; said assembly comprising a piston and a connecting rod operatively connected thereto; said connecting rod having a recess on the periphery thereof and a ledge on which said piston rests, said ledge dividing said connecting rod into upper and lower sections; a fluid passage aperture extending through said rod between said upper and lower sections; and a resilient sleeve member mounted on said upper section, said sleeve member having a projection fitting into said recess and resiliently urging said piston against said ledge to operatively connect said pistion and said connecting rod and to minimize play therebetween, and a flap secured to said sleeve movable in response to pressure variations within said cylinder between a first position overlying and covering the opening of said fluid passage located in the upper section of said rod and a second position uncovering said opening.
Claim 2
Dependent Claim
172 words
A piston-connecting rod assembly for use in a damping dashpot cylinder with an aperture therethrough and valve means in said aperture for providing single direction fluid flow out of said cylinder; said assembly comprising a piston and a connecting rod operatively connected thereto; said connecting rod having a recess on the periphery thereof and a ledge on which said piston rests, said ledge dividing said connecting rod into upper and lower sections; a fluid passage aperture extending through said rod between said upper and lower sections; and a resilient sleeve member mounted on said upper section, said sleeve member having a projection fitting into said recess and resiliently urging said piston against said ledge to operatively connect said pistion and said connecting rod and to minimize play therebetween, and a flap secured to said sleeve movable in response to pressure variations within said cylinder between a first position overlying and covering the opening of said fluid passage located in the upper section of said rod and a second position uncovering said opening.
Claim 3
Dependent Claim
134 words
A damping dashpot assembly comprising a damping dashpot cylinder with an aperture therethrough and valve means in said aperture for providing single direction fluid flow out of said cylinder; a piston-connectIng rod subassembly comprising a piston and a connecting rod operatively connected thereto; said connecting rod having receiving means for receiving said piston, said receiving means dividing said connecting rod into upper and lower sections; a fluid passage aperture extending through said rod between said upper and lower sections; and a sleeve member mounted on said upper section, said sleeve member having a movable flap secured thereto normally overlying and covering the opening of said fluid passage located in the upper section of said rod and movable to a position uncovering said opening, said sleeve providing means to secure the piston to the rod.
Claim 4
Dependent Claim
134 words
A damping dashpot assembly comprising a damping dashpot cylinder with an aperture therethrough and valve means in said aperture for providing single direction fluid flow out of said cylinder; a piston-connectIng rod subassembly comprising a piston and a connecting rod operatively connected thereto; said connecting rod having receiving means for receiving said piston, said receiving means dividing said connecting rod into upper and lower sections; a fluid passage aperture extending through said rod between said upper and lower sections; and a sleeve member mounted on said upper section, said sleeve member having a movable flap secured thereto normally overlying and covering the opening of said fluid passage located in the upper section of said rod and movable to a position uncovering said opening, said sleeve providing means to secure the piston to the rod.
Claim 5
Dependent Claim
11 words
The assembly of claim 2, wherein said sleeve member is resilient.
Claim 6
Dependent Claim
17 words
The assembly of claim 2, wherein said movable flap is an integral part of said sleeve member.
Claim 7
Dependent Claim
14 words
The assembly of claim 2, wherein said connecting rod comprises a molded plastic construction.
Claim 8
Dependent Claim
17 words
The assembly of claim 2, wherein return means are positioned on the upper surface of said piston.
Claim 9
Dependent Claim
13 words
The assembly of claim 6, wherein said return means is a compression spring.
Claim 10
Dependent Claim
25 words
The assembly of claim 2, wherein said sleeve member is received in said receiving means and there engages both said piston and said connecting rod.
Claim 11
Dependent Claim
35 words
The assembly of claim 8, wherein said connecting rod has a recess on the periphery thereof and said sleeve member has a projection fitting into said recess to secure said piston to said connecting rod.
Claim 12
Dependent Claim
38 words
The assembly of claim 8, wherein said receiving means comprises a ledge on which said piston rests, said sleeve member engaging said piston on the surface opposite to said ledge and thereby urges said piston against said ledge.
Claim 13
Dependent Claim
11 words
The assembly of claim 8, wherein said sleeve member is resilient.
Claim 14
Dependent Claim
15 words
The assembly of claim 11, wherein said piston is resiliently secured to said connecting rod.
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) | 1977-03-25 | 1977-09-24 | 1978-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-25 | 1981-09-24 | 1982-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-25 | 1985-09-24 | 1986-03-26 | $7700.00 | Window Closed / Lapsed |