US3817271A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigeration by-pass and service valve
Assignee: Individual
•
Filing: 1971-08-15
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Granted: 1974-06-18
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Expires: 1991-08-15
Abstract
Abstract A refrigeration by-pass service valve. The valve comprises a pair of mating blocks adapted to be clamped together. The blocks are provided with inner complementary semi-circular walls forming a seat for copper tubing or pipe. Means for pinching the copper tubing or pipe to interrupt the flow of gas are provided in the blocks. One of the blocks is provided with a by-pass passage and means for securing a gauge and for charging a refrigeration or air conditioner hermetically sealed unit. The one block is provided with a pair of cone-shaped cutters for cutting holes in the copper pipe or tubing for communicating their pinched-off sections with the by-pass passage in the block. The cone-shaped cutters also act as valve closures for the cut holes.
Inventors
- 👤 L Roven
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:58
CPC Classifications
F; F16; F16L; F16L41/00; F16L41/04; F16L41/06; F16L55/00; F16L55/16; F16L55/1604; Y; Y10; Y10T; Y10T137/00; Y10T137/598; Y10T137/612; Y10T137/6123
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
145 words
In a refrigeration system, isolating means for preventing air, moisture and dirt from entering the system for determining the efficiency of a compressor and removal of a compressor, said isolating means comprising a by-pass and service valve having a pair of upper and lower blocks, each of said blocks having mating semi-cylindrical grooves extending part way into said blocks and terminating as opposed pinching elements centrally of said blocks for pinching a copper tubing or pipe lodged between said semicylindrical grooves, means for securing said blocks in intimate contact with one another, cutter means displaceable in said upper block spaced on both sides of said pinching elements for cutting a pair of holes in a tubing or pipe, said upper block having a passageway for communicating with a pair of such cutholes, means extending from said passage for securing a gauge and gas filling manifold.
Claim 2
Dependent Claim
145 words
In a refrigeration system, isolating means for preventing air, moisture and dirt from entering the system for determining the efficiency of a compressor and removal of a compressor, said isolating means comprising a by-pass and service valve having a pair of upper and lower blocks, each of said blocks having mating semi-cylindrical grooves extending part way into said blocks and terminating as opposed pinching elements centrally of said blocks for pinching a copper tubing or pipe lodged between said semicylindrical grooves, means for securing said blocks in intimate contact with one another, cutter means displaceable in said upper block spaced on both sides of said pinching elements for cutting a pair of holes in a tubing or pipe, said upper block having a passageway for communicating with a pair of such cutholes, means extending from said passage for securing a gauge and gas filling manifold.
Claim 3
Dependent Claim
36 words
The device according to claim 1, wherein said cutter means are a pair of threaded rods formed as cone-shaped cutters on one end and wrench-receiving heads on the other end, disposed outwardly of said upper block.
Claim 4
Dependent Claim
46 words
The device as claimed in claim 2, further provided with threaded sealing caps securable to said other ends of said threaded rods and gaskets interposed between said sealing caps and said upper block for forming a gas-tight seal for said threaded rods and said upper block.
Claim 5
Dependent Claim
26 words
The device as claimed in claim 3, wherein said means for securing said upper and lower blocks are a plurality of bolts extending through said blocks.
Claim 6
Dependent Claim
33 words
The device as claimed in claim 1, wherein said means for securing a gauge is a spring biased valve adapted to be opened by the connection of a gauge or gas filling hose.
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) | 1977-06-17 | 1977-12-17 | 1978-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-17 | 1981-12-17 | 1982-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-17 | 1985-12-17 | 1986-06-18 | $7700.00 | Window Closed / Lapsed |